LinuxLists.cc - [PATCH v10 0/8] Add MediaTek MT6370 PMIC support

2022-09-06 09:19:44

Subject: [PATCH v10 0/8] Add MediaTek MT6370 PMIC support

From: ChiaEn Wu <[email protected]>

This patch series add MediaTek MT6370 PMIC support and add a index macro
to <linear_range.h>. The MT6370 is a highly-integrated smart power
management IC, which includes a single cell Li-Ion/Li-Polymer switching
battery charger, a USB Type-C & Power Delivery (PD) controller, dual
Flash LED current sources, a RGB LED driver, a backlight WLED driver,
a display bias driver and a general LDO for portable devices.

First, in this series of patches,
- 'dt-binding: mfd' and 'mfd driver' have been applied by Lee in the v7.
https://lore.kernel.org/all/[email protected]/
https://lore.kernel.org/all/[email protected]/

- 'tcpci driver' has been applied by Greg in the v8.
https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git/commit/?h=usb-next&id=c2a8ea5997fdfeb43eda259d5533234c3cae05d7

- 'dt-binding: backlight' and 'backlight driver' have been applied
by Lee in v9.
https://lore.kernel.org/all/[email protected]/
https://lore.kernel.org/all/YxYS7%[email protected]/

Second, the LED RGB driver is based on Andy's patch which moves
led_init_default_state_get() to the global header.
https://lore.kernel.org/all/[email protected]/

In addition, we added a macro to the <linear_range.h> for declaring the
linear_range struct simply (see patch v10-0004) and made some changes for
MT6370 drivers (see v10 section of the change log below).

Thank you,
ChiaEn Wu
---
Change in v10:
- In Patch 6/8 (MT6370 Charger):
- Add a feature (disable input current limit) in
'mt6370_chg_init_setting()'
- Add the header file <linux/devm-helpers.h> for using
'devm_work_autocancel()' and 'devm_delayed_work_autocancel()
- Rename 'pwr_rdy' to 'opposite_pwr_rdy' in
'mt6370_chg_pwr_rdy_check()'
- Rename enum elements
('MT6370_ATTACH_STAT_ATTACH_BC12_NOT_DONE' -->
'MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12')
- Revise the assignment value of 'val.intval' in
'mt6370_chg_pwr_rdy_check()' to make the code easy to read.
- Revise the initialization of bc12_work (INIT_WORK() -->
using devm_work_autocancel()) and mivr_dwork
(INIT_DELAYED_WORK + devm_add_action_or_reset() -->
devm_delayed_work_autocancel())

- In Patch 8/8 (MT6370 LED Flashlight):
- Add the revert code when '__mt6370_flash_brightness_set()'
return failed.
- Revise type of 'led_no' (u32 -> u8)
- Revise type of 'default_state' (u32 -> enum led_default_state)
- Revise the return value of '_mt6370_flash_brightness_set()'
- Remove the useless function 'mt6370_init_common_properties()'
- Use 'led_init_default_state_get()' to init 'led->default_state'

Changes in v9:
- In Patch 05/10:
- Revise LINEAR_RANGE() and LINEAR_RANGE_IDX()

- In Patch 07/10:
- Fix wrong 'F_IINLMTSEL' setting in 'mt6370_chg_init_setting()'
- Revise the usage of LINEAR_RANGE_IDX()

- In Patch 09/10:
- Revise the format of the comments.

- In Patch 10/10:
- Revise the format of the comments.

Changes in v8:
- In Patch 06/12:
- Add linear_range_idx macro for declaring the linear_range
struct simply.

- In Patch 09/12:
- Remove MT6370_CHG_LINEAR_RANGE() macro, and change to use
LINEAR_RANGE_IDX() macro

- In Patch 10/12:
- Add include header file <linux/leds.h>
- Remove useless 'enum mt6370_state' because of using 'enum led_default_state'
- Revise the calculation of 'val' in 'mt6370_gen_breath_pattern()'
- Replace the medthod of getting default-state by using
led_init_default_state_get()

- In Patch 11/12:
- Add missing 'dependency config' in Kconfig
- Revise all multi-line comments

- In Patch 12/12:
- Add missing header file <linux/property.h>
- Remove useledd header file <linux/of_device.h>
- Revise the comment of 'mt6370_check_vendor_info()'

Changes in v7:
- In Patch 05/13:
- Add the second compatible string for 'mt6372'
- Add 'mediatek,bled-exponential-mode-enable' property for enable the
exponential mode of backlight brightness
- Add validation for the maximum value of 'default-brightness' and
'max-brightness'

- In Patch 07/13:
- Move '#define MT6370_REG_MAXADDR' to the next line of
'#define MT6370_REG_CHG_MASK1'
- Rename 'MT6370_REG_ADDRLEN' to 'MT6370_MAX_ADDRLEN'

- In Patch 08/13:
- Revise 'devm_add_action_or_reset(dev, ...)' to one line
- Revise 'return regmap_update_bits(...)' with using positive
conditional

- In Patch 09/13:
- Add AICR(100mA ~ 350mA), ICHG(100mA ~ 800mA) macros
- Remove 400mA AICR and 900mA ICHG macros
- Revise using 'if-else' to 'switch-case' in mt6370_adc_read_scale()
where the adc channel is ibus or ibat

- In Patch 10/13:
- Revise the method to enable/disable irq
- Revise all 'if (ret < 0)' to 'if (ret)' after using
mt6370_chg_field_set/get()
- Revise all 'OTG' text again

- In Patch 11/13:
- Add the comment for the union of 'struct mt6370_led'
- Revise the wrong description of 'Authors'
- Revise some typos (e.g. led --> LED)
- Revise 'if (!fwnode_property_read_string())' to
'ret = fwnode_property_read_string()'
- Replace 'memcpy(...)' with 'put_unaligned_be24()' in
mt6370_gen_breath_pattern()
- Replace all 'LED_OFF' with 0
- Remove the redundant assignment in mt6370_mc_pattern_clear()

- In Patch 12/13:
- Fix the indentation.
- For the well defined macro, the parenthesis is needed for input parameters.
- Replace some dev_warn to dev_info in 'init_flash_properties'.
- Add sentinel comment for the terminator entry of of_device_id.
- Use priv->fled_torch_used directly.
- Delete 0 in {}.
- Use _uA instead of _UA in definition.
- Refine the description.
- Use usleep_range instead of udelay.
- Rename config to LEDS_MT6370_FLASH.
- Add missing ">" in copyright.
- Change the Kconfig order

- In Patch 13/13:
- Add support 'exponential mode' property parsing
- Add 'return dev_err_probe()' after 'if (IS_ERR(priv->enable_gpio))'
- Add 'mt6372' compatible string
- Revise Kconfig help text
- Revise update()/get() for supporting 16384 steps (MT6372)
- Revise all shift usages form using 'ffs() and fls()' to defining the
_SHIFT macros.
- Revise 'brightness ? 1 : 0' to '!!brightness' in gpiod_set_value()

Changes in v6:
- In Patch 03/13:
- Add 'reg' property of led of multi-led to prevent checking
error.

- In Patch 08/13:
- Convert tcpci as device resource managed with
'devm_add_action_or_reset' api.
- Refine remvoe callback.
- Refine the commit text from 'this commit add' to 'add'.

- In Patch 09/13:
- Using 'struct device *dev = &pdev->dev' in probe()
- Revise the sixth parameter of regmap_read_poll_timeout() by
Replacing '1000' with 'MILLI'
- Revise the units of three macros
- MT6370_AICR_400MA --> MT6370_AICR_400_mA
- MT6370_ICHG_500MA --> MT6370_ICHG_500_mA
- MT6370_ICHG_900MA --> MT6370_ICHG_900_mA

- In patch 10/13:
- Remove the varable (*psy_desc) of struct mt6370_priv
- Remove the deprecated usb type (POWER_SUPPLY_TYPE_USB_CDP and
POWER_SUPPLY_TYPE_USB_DCP)
- Remove useless remove()
- Revise all units from mini- to micro-
- Revise get/set power_supply_prop (change to directly return get/set
regmap_field)
- Revise probe() and use devm_add_action_or_reset() for handling of the
workqueue/delayed_work/mutex
- Revise mt6370_chg_psy_desc
- Add '.name = "mt6370-charger"'
- Use 'static const'

- In patch 11/13:
- Remove the 'ko' from mt6370 led Kconfig description.
- Add both authors for Alice and ChiYuan.
- Use pdata to distinguish the code from mt6370/71 to mt6372.
- Instead of 'state' define, use the 'state' enum.
- Fix the typo for 'MT6372_PMW_DUTY'.
- For pwm_duty define, replace with bit macro - 1.
- Refine all the labels from 'out' to 'out_unlock'.
- Use struct 'dev' variable and 'dev_err_probe' to optimize the LOC.
- Revise for the array initialization from {0} to {}.
- Move into rgb folder and rename file name to 'leds-mt6370-rgb'.
- Refine the 'comma' usage in struct/enum.

- In patch 12/13:
- Use 'GENMASK' instead of 'BIT'.
- Use dev_err_probe to decrease LOC.
- Use 'dev' variable to make probe function more clean.
- Refine the return of _mt6370_flash_brightness_set function.
- Refine the descriptions.
- Use mt6370_clamp() instead of clamp_align().
- Use device resource managed API for v4l2 flash_release.

Changes in v5:
- In patch 07/13:
- Add the comma in the last REGMAP_IRQ_REG_LINE(),
DEFINE_RES_IRQ_NAMED() and MFD_CELL_RES()
- Add the prefix in the first parameter of all mfd_cell
- Move enum and struct mt6370_info to mt6370.h
- Remove struct device *dev in struct mt6370_info
- Revise the description of Kconfig help text
- Revise MODULE_DESCRIPTION()

- In patch 08/13:
- Add comma for the last index of mt6370_reg_init.
- Use dev_err_probe to decrease LOC.
- Use 'dev' variable to make probe function more clean.
- Refine kconfig text.
- Remove both 'else' in set_vbus callback.
- Remove comma for of_device_id if the assigned member is only one.

- In patch 09/13:
- Replace using snprintf() with sysfs_emit() in mt6370_adc_read_label()
- Remove macro ADC_CONV_TIME_US
- Revise all variable ordering
- Revise the description of Kconfig help text
- Revise MODULE_DESCRIPTION()

- In patch 10/13:
- Replace unsigned int type of pwr_rdy with bool in
mt6370_chg_set_online()
- Remove redundant 'else' in mt6370_chg_field_get()
- Revise 'if-else' in mt6370_chg_field_set()
- Revise 'if' condition in mt6370_chg_enable_irq()
- Revise all text 'otg' --> 'OTG'
- Revise MT6370_MIVR_IBUS_TH_100_MA --> MT6370_MIVR_IBUS_TH_100_mA
- Revise the description of Kconfig help text

- In patch 12/13:
- Refine the coding style.
- Use "dev" instead of "&pdev->dev".

- In patch 13/13:
- Add missed <mod_devicetable.h>
- Add struct device *dev in probe() to make code cleaning
- Remove useless including header file <gpio/driver.h>, <of.h>
- Remove useless variable uasage in mt6370_init_backlight_properties()
- Remove redundant checking enable_gpio in mt6370_bl_update_status()
- Remove redundant parentheses in mt6370_bl_get_brightness()
- Revise the description of Kconfig help text
- Revise the calculation of hys_th_steps

Changes in v4:
- In patch 02/13:
- Add minItems of "io-channel-names"
- Replace text "Mediatek" with "MediaTek"

- In patch 06/13:
- Roll back all "$ref: " to v2 patch style (using "/schemas/...")

- In patch 07/13:
- Replace text "Mediatek" with "MediaTek" in Kconfig
- Replace "first break and then return" with "return directly"
in "mt6370_check_vendor_info()"
- Add module name related description in Kconfig helptext
- Add Copyright in the source code
- Add header file "mt6370.h" for all "#define IRQ"
- Adjust Makefile order of MT6370
- Refine "bank_idx" and "bank_addr" in
"mt6375_regmap_read()" / "mt6375_regmap_write()"
- Refine redundant "else if" in "mt6370_regmap_read()"

- In patch 08/13:
- Replace text "Mediatek" with "MediaTek" in Kconfig
- Replace "first ret=regulator_(dis/en)able and then return"
with "return directly" in "mt6370_tcpc_set_vbus()"
- Replace header file <linux/of.h> with <linux/mod_devicetable.h>
- Add Copyright in the source code
- Add module name related description in Kconfig helptext
- Remove header file <linux/of.h>
- Refine all probe error by using dev_err_probe()

- In patch 09/13:
- Replace text "Mediatek" with "MediaTek"
- Replace all "first dev_err() and then return" with
"return dev_err_probe()"
- Add Copyright in the source code
- Add module name related description in Kconfig
- Add unit suffix of macro "ADC_CONV_POLLING_TIME"
- Add new macro "ADC_CONV_TIME_MS"
- Adjust the position of include file <mediatek,mt6370_adc.h>
- Adjust the postions between <linux/module.h> and
<linux/mod_devicetable.h>
- Fix some incorrect characters

- In patch 10/13:
- Replace text "Mediatek" with "MediaTek" in Kconfig and
MODULE_DESCRIPTION()
- Replace "mt6370_chg_val_to_reg" and "mt6370_chg_reg_to_val"
with "linear_range" API
- Replace "first break and then return" with "return directly"
in all cases of get/set power_supply_property
- Replace all "first dev_err() and then return" with "return
dev_err_probe()"
- Replace all "return IS_ERR(priv->rdev) ? PTR_ERR(priv->rdev) : 0"
with "PTR_ERR_OR_ZERO()"
- Replace "priv->dev->of_node" with "dev_of_node()"
- Add Copyright in the source code
- Add module name related description in Kconfig helptext
- Add proper unit of "MT6370_MIVR_IBUS_TH"
- Add error check in "mt6370_chg_get_status"
- Remove including <mediatek,mt6370_adc.h> header file
- Remove redundant comma of every enum terminator line
- Remove unwanted blank lines
- Remove the useless label (toggle_cfo_exit:)
- Remove using atomic
- Remove using of_match_ptr()
- Fix some incorrect characters
- Fix updating wrong bits when using ena_gpiod of OTG regulator
- Adjust the probe order in probe()

- In patch 11/13:
- Replace text "Mediatek" with "MediaTek" in Kconfig
- Replace text "const" with "constant" in Kconfig
- Add Copyright in the source code

- In patch 12/13:
- Replace text "Mediatek" with "MediaTek" in Kconfig
- Add Copyright in the source code

- In patch 13/13:
- Replace text "Mediatek" with "MediaTek" in Kconfig
- Add Copyright in the source code
- Revise the comment of "PWM HYS STEPS"

Changes in v3:
- Remove ADC ABI file, which is added in v2 Patch 7
- In patch 02/14:
- Add items and remove maxItems of io-channels
- Add io-channel-names and describe each item
- Add "unevaluatedProperties: false" in "usb-otg-vbus-regulator"
- Rename "enable-gpio" to "enable-gpios" in "usb-otg-vbus-regulator"

- In patch 03/14:
- Use leds-class-multicolor.yaml instead of common.yaml.
- Split multi-led and led node.
- Add subdevice "led" in "multi-led".

- In patch 04/14:
- Remove the description of enum.

- In patch 05/14:
- Rename "mediatek,bled-pwm-hys-input-threshold-steps" to
"mediatek,bled-pwm-hys-input-th-steps"
- Refine "bled-pwm-hys-input-th-steps", "bled-ovp-microvolt",
"bled-ocp-microamp" enum values

- In patch 06/14:
- Use " in entire patchset
- Refine ADC description
- Rename "enable-gpio" to "enable-gpios" in "regualtor"

- In patch 07/14:
- Refine Kconfig help text
- Refine error message of unknown vendor ID in
mt6370_check_vendor_info()
- Refine return value handling of mt6370_regmap_read()
- Refine all probe error by using dev_err_probe()
- Refine "bank_idx" and "bank_addr" in mt6370_regmap_read() and
mt6370_regmap_write()
- Add "#define VENID*" and drop the comments in
mt6370_check_vendor_info()
- Drop "MFD" in MODULE_DESCRIPTION()

- In patch 09/14:
- Refine Kconfig help text

- In patch 10/14:
- Refine Kconfig help text
- Refine all channel value in read_scale()
a. current: uA --> mA
b. voltage: uV --> mV
c. temperature: degrees Celsius --> milli degrees Celsius
- Add "default:" condition of switch statement in read_scale() and read_raw()
- Add error message for reading ADC register failed
- Add the comment for adc_lock
- Add <linux/mod_devicetable.h> header file for struct of_device_id
- Replace "adc" text with "ADC" in all of the error messages

- In patch 12/14:
- Refine the grammer of the Kconfig.
- Change reg mode to the const current mode.

- In patch 14/14:
- Refine bool properties parsing (pwm-enable, ovp-shutdown, ocp-shutdown) in DT
parsing function
- Refine u32 and u8 properties parsing (pwm-hys-input-th-steps, ovp-microvolt,
ocp-microamp), from using register value to using actual value
- Refine error string of "channle-use" parsing failed
- Refine Kconfig help text

Changes in v2:
- In patch 01/15:
- Add "unevaluatedProperties: false".
- Delete "DT bindings".
- Refine the description to fit in 80 columns.
- Skip the connector description.

- In patch 02/15:
- Refine items description of interrupt-name
- Rename "usb-otg-vbus" to "usb-otg-vbus-regulator"
- Add constraint properties for ADC

- In patch 03/15:
- Skip not useful description of "^(multi-)?led@[0-3]$"
and reg.
- Due to the dependency, remove the mention of mfd
document directory.
- Delete Soft-start property. In design aspect, we think
soft-restart should always be enabled, our new chip
has deleted the related setting register , also, we don’t
allow user adjust this parameter in this chip.
- Refine the commit message.

- In patch 04/15:
- Skip not useful description of "^led@[0-1]$" and reg.
- Add apace after '#'.
- Refine the commit message.

- In patch 05/15:
- Remove "binding documentation" in subject title
- Refine description of mt6370 backlight binding
document
- Refine properties name(bled-pwm-hys-input-bit,
bled-ovp-microvolt, bled-ocp-microamp) and their
description

- In patch 06/15:
- Refine ADC and Regulator descriptions
- Refine include header usage in example
- Refine node name to generic node name("pmic@34")
- Refine led example indentation
- Refine license of mediatek,mt6370_adc.h
- Rename the dts example from IRQ define to number.
- Remove mediatek,mt6370.h

- In patch 07/15:
- Add ABI documentation for mt6370 non-standard ADC
sysfs interfaces.

- In patch 08/15:
- Add all IRQ define into mt6370.c.
- Refine include header usage

- In patch 09/15:
- No changes.

- In patch 10/15:
- Use 'gpiod_get_from_of_node' to replace
'fwnode_gpiod_get_index'.

- In patch 11/15:
- Refine Kconfig mt6370 help text
- Refine mask&shift to FIELD_PREP()
- Refine mutex lock name ("lock" -> "adc_lock")
- Refine mt6370_adc_read_scale()
- Refine mt6370_adc_read_offset()
- Refine mt6370_channel_labels[] by using enum to index
chan spec
- Refine MT6370_ADC_CHAN()
- Refine indio_dev->name
- Remove useless include header files

- In patch 12/15:
- Refine mt6370_chg_otg_rdesc.of_match
("mt6370,otg-vbus" -> "usb-otg-vbus-regulator") to match
DT binding

- In patch 13/15:
- Refine Kconfig description.
- Remove include "linux/of.h" and use
"linux/mod_devicetable.h".
- Place a comma for the last element of the const
unsigned int array.
- Add a comment line for the mutex 'lock'.
- In probe function, use 'dev_err_probe' in some
judgement to reduce the LOC.
- Refine include header usage.
BIT/GENMASK -> linux/bits.h
FIELD_GET -> linux/bitfield.h

- In patch 14/15:
- Add blank line.
- Replace container_of() with to_mt6370_led() .
- Refine description of ramping.
- Refine the mt6370_init_common_properties function.
- Refine the probe return.

- In patch 15/15:
- Refine MT6370 help text in Kconfig
- Refine DT Parse function
- Remove useless enum
- Add comment for 6372 backward compatible in
bl_update_status() and
check_vendor_info()
- Using dev_err_probe(); insteads dev_err()&return; in
the probe()

Alice Chen (2):
dt-bindings: leds: Add MediaTek MT6370 flashlight
leds: flash: mt6370: Add MediaTek MT6370 flashlight support

ChiYuan Huang (2):
dt-bindings: leds: mt6370: Add MediaTek MT6370 current sink type LED
indicator
leds: rgb: mt6370: Add MediaTek MT6370 current sink type LED Indicator
support

ChiaEn Wu (4):
dt-bindings: power: supply: Add MediaTek MT6370 Charger
lib: add linear range index macro
iio: adc: mt6370: Add MediaTek MT6370 support
power: supply: mt6370: Add MediaTek MT6370 charger driver

.../bindings/leds/mediatek,mt6370-flashlight.yaml | 41 +
.../bindings/leds/mediatek,mt6370-indicator.yaml | 81 ++
.../power/supply/mediatek,mt6370-charger.yaml | 88 ++
drivers/iio/adc/Kconfig | 12 +
drivers/iio/adc/Makefile | 1 +
drivers/iio/adc/mt6370-adc.c | 305 ++++++
drivers/leds/flash/Kconfig | 14 +
drivers/leds/flash/Makefile | 1 +
drivers/leds/flash/leds-mt6370-flash.c | 630 ++++++++++++
drivers/leds/rgb/Kconfig | 13 +
drivers/leds/rgb/Makefile | 1 +
drivers/leds/rgb/leds-mt6370-rgb.c | 1010 ++++++++++++++++++++
drivers/power/supply/Kconfig | 14 +
drivers/power/supply/Makefile | 1 +
drivers/power/supply/mt6370-charger.c | 961 +++++++++++++++++++
include/linux/linear_range.h | 11 +
16 files changed, 3184 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/mediatek,mt6370-flashlight.yaml
create mode 100644 Documentation/devicetree/bindings/leds/mediatek,mt6370-indicator.yaml
create mode 100644 Documentation/devicetree/bindings/power/supply/mediatek,mt6370-charger.yaml
create mode 100644 drivers/iio/adc/mt6370-adc.c
create mode 100644 drivers/leds/flash/leds-mt6370-flash.c
create mode 100644 drivers/leds/rgb/leds-mt6370-rgb.c
create mode 100644 drivers/power/supply/mt6370-charger.c

--
2.7.4

2022-09-06 09:20:32

by ChiaEn Wu

[permalink] [raw]

Subject: [PATCH v10 5/8] iio: adc: mt6370: Add MediaTek MT6370 support

2022-09-06 09:20:51

by ChiaEn Wu

[permalink] [raw]

Subject: [PATCH v10 7/8] leds: rgb: mt6370: Add MediaTek MT6370 current sink type LED Indicator support

From: ChiYuan Huang <[email protected]>

The MediaTek MT6370 is a highly-integrated smart power management IC,
which includes a single cell Li-Ion/Li-Polymer switching battery
charger, a USB Type-C & Power Delivery (PD) controller, dual
Flash LED current sources, a RGB LED driver, a backlight WLED driver,
a display bias driver and a general LDO for portable devices.

Add support for the MediaTek MT6370 Current Sink Type LED Indicator
driver. It can control four channels current-sink RGB LEDs with 3 modes:
constant current, PWM, and breath mode.

Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
Co-developed-by: Alice Chen <[email protected]>
Signed-off-by: Alice Chen <[email protected]>
Signed-off-by: ChiYuan Huang <[email protected]>
Signed-off-by: ChiaEn Wu <[email protected]>
---
drivers/leds/rgb/Kconfig | 13 +
drivers/leds/rgb/Makefile | 1 +
drivers/leds/rgb/leds-mt6370-rgb.c | 1010 ++++++++++++++++++++++++++++++++++++
3 files changed, 1024 insertions(+)
create mode 100644 drivers/leds/rgb/leds-mt6370-rgb.c

diff --git a/drivers/leds/rgb/Kconfig b/drivers/leds/rgb/Kconfig
index 204cf47..7d86bb2 100644
--- a/drivers/leds/rgb/Kconfig
+++ b/drivers/leds/rgb/Kconfig
@@ -26,4 +26,17 @@ config LEDS_QCOM_LPG

If compiled as a module, the module will be named leds-qcom-lpg.

+config LEDS_MT6370_RGB
+ tristate "LED Support for MediaTek MT6370 PMIC"
+ depends on MFD_MT6370
+ select LINEAR_RANGE
+ help
+ Say Y here to enable support for MT6370_RGB LED device.
+ In MT6370, there are four channel current-sink LED drivers that
+ support hardware pattern for constant current, PWM, and breath mode.
+ Isink4 channel can also be used as a CHG_VIN power good indicator.
+
+ This driver can also be built as a module. If so, the module
+ will be called "leds-mt6370-rgb".
+
endif # LEDS_CLASS_MULTICOLOR
diff --git a/drivers/leds/rgb/Makefile b/drivers/leds/rgb/Makefile
index 0675bc0..8c01daf 100644
--- a/drivers/leds/rgb/Makefile
+++ b/drivers/leds/rgb/Makefile
@@ -2,3 +2,4 @@

obj-$(CONFIG_LEDS_PWM_MULTICOLOR) += leds-pwm-multicolor.o
obj-$(CONFIG_LEDS_QCOM_LPG) += leds-qcom-lpg.o
+obj-$(CONFIG_LEDS_MT6370_RGB) += leds-mt6370-rgb.o
diff --git a/drivers/leds/rgb/leds-mt6370-rgb.c b/drivers/leds/rgb/leds-mt6370-rgb.c
new file mode 100644
index 0000000..1f9d648
--- /dev/null
+++ b/drivers/leds/rgb/leds-mt6370-rgb.c
@@ -0,0 +1,1010 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Authors:
+ * ChiYuan Huang <[email protected]>
+ * Alice Chen <[email protected]>
+ *
+ */
+
+#include <linux/bitops.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/led-class-multicolor.h>
+#include <linux/linear_range.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/util_macros.h>
+
+#include <asm-generic/unaligned.h>
+
+enum {
+ MT6370_LED_ISNK1 = 0,
+ MT6370_LED_ISNK2,
+ MT6370_LED_ISNK3,
+ MT6370_LED_ISNK4,
+ MT6370_MAX_LEDS
+};
+
+enum mt6370_led_mode {
+ MT6370_LED_PWM_MODE = 0,
+ MT6370_LED_BREATH_MODE,
+ MT6370_LED_REG_MODE,
+ MT6370_LED_MAX_MODE
+};
+
+enum mt6370_led_field {
+ F_RGB_EN = 0,
+ F_CHGIND_EN,
+ F_LED1_CURR,
+ F_LED2_CURR,
+ F_LED3_CURR,
+ F_LED4_CURR,
+ F_LED1_MODE,
+ F_LED2_MODE,
+ F_LED3_MODE,
+ F_LED4_MODE,
+ F_LED1_DUTY,
+ F_LED2_DUTY,
+ F_LED3_DUTY,
+ F_LED4_DUTY,
+ F_LED1_FREQ,
+ F_LED2_FREQ,
+ F_LED3_FREQ,
+ F_LED4_FREQ,
+ F_MAX_FIELDS
+};
+
+enum mt6370_led_ranges {
+ R_LED123_CURR = 0,
+ R_LED4_CURR,
+ R_LED_TRFON,
+ R_LED_TOFF,
+ R_MAX_RANGES
+};
+
+enum mt6370_pattern {
+ P_LED_TR1 = 0,
+ P_LED_TR2,
+ P_LED_TF1,
+ P_LED_TF2,
+ P_LED_TON,
+ P_LED_TOFF,
+ P_MAX_PATTERNS
+};
+
+#define MT6370_REG_DEV_INFO 0x100
+#define MT6370_REG_RGB1_DIM 0x182
+#define MT6370_REG_RGB2_DIM 0x183
+#define MT6370_REG_RGB3_DIM 0x184
+#define MT6370_REG_RGB_EN 0x185
+#define MT6370_REG_RGB1_ISNK 0x186
+#define MT6370_REG_RGB2_ISNK 0x187
+#define MT6370_REG_RGB3_ISNK 0x188
+#define MT6370_REG_RGB1_TR 0x189
+#define MT6370_REG_RGB_CHRIND_DIM 0x192
+#define MT6370_REG_RGB_CHRIND_CTRL 0x193
+#define MT6370_REG_RGB_CHRIND_TR 0x194
+
+#define MT6372_REG_RGB_EN 0x182
+#define MT6372_REG_RGB1_ISNK 0x183
+#define MT6372_REG_RGB2_ISNK 0x184
+#define MT6372_REG_RGB3_ISNK 0x185
+#define MT6372_REG_RGB4_ISNK 0x186
+#define MT6372_REG_RGB1_DIM 0x187
+#define MT6372_REG_RGB2_DIM 0x188
+#define MT6372_REG_RGB3_DIM 0x189
+#define MT6372_REG_RGB4_DIM 0x18A
+#define MT6372_REG_RGB12_FREQ 0x18B
+#define MT6372_REG_RGB34_FREQ 0x18C
+#define MT6372_REG_RGB1_TR 0x18D
+
+#define MT6370_VENID_MASK GENMASK(7, 4)
+#define MT6370_CHEN_BIT(id) BIT(MT6370_LED_ISNK4 - id)
+#define MT6370_VIRTUAL_MULTICOLOR 5
+#define MC_CHANNEL_NUM 3
+#define MT6370_PWM_DUTY (BIT(5) - 1)
+#define MT6372_PWM_DUTY (BIT(8) - 1)
+
+struct mt6370_led {
+ /*
+ * If the color of the LED in DT is set to
+ * - 'LED_COLOR_ID_RGB'
+ * - 'LED_COLOR_ID_MULTI'
+ * The member 'index' of this struct will be set to
+ * 'MT6370_VIRTUAL_MULTICOLOR'.
+ * If so, this LED will choose 'struct led_classdev_mc mc' to use.
+ * Instead, if the member 'index' of this struct is set to
+ * 'MT6370_LED_ISNK1' ~ 'MT6370_LED_ISNK4', then this LED will choose
+ * 'struct led_classdev isink' to use.
+ */
+ union {
+ struct led_classdev isink;
+ struct led_classdev_mc mc;
+ };
+ struct mt6370_priv *priv;
+ enum led_default_state default_state;
+ u32 index;
+};
+
+struct mt6370_pdata {
+ const unsigned int *tfreq;
+ unsigned int tfreq_len;
+ u8 pwm_duty;
+ u16 reg_rgb1_tr;
+ s16 reg_rgb_chrind_tr;
+};
+
+struct mt6370_priv {
+ /* Per LED access lock */
+ struct mutex lock;
+ struct device *dev;
+ struct regmap *regmap;
+ struct regmap_field *fields[F_MAX_FIELDS];
+ const struct reg_field *reg_fields;
+ const struct linear_range *ranges;
+ struct reg_cfg *reg_cfgs;
+ const struct mt6370_pdata *pdata;
+ unsigned int leds_count;
+ unsigned int leds_active;
+ struct mt6370_led leds[];
+};
+
+static const struct reg_field common_reg_fields[F_MAX_FIELDS] = {
+ [F_RGB_EN] = REG_FIELD(MT6370_REG_RGB_EN, 4, 7),
+ [F_CHGIND_EN] = REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 7, 7),
+ [F_LED1_CURR] = REG_FIELD(MT6370_REG_RGB1_ISNK, 0, 2),
+ [F_LED2_CURR] = REG_FIELD(MT6370_REG_RGB2_ISNK, 0, 2),
+ [F_LED3_CURR] = REG_FIELD(MT6370_REG_RGB3_ISNK, 0, 2),
+ [F_LED4_CURR] = REG_FIELD(MT6370_REG_RGB_CHRIND_CTRL, 0, 1),
+ [F_LED1_MODE] = REG_FIELD(MT6370_REG_RGB1_DIM, 5, 6),
+ [F_LED2_MODE] = REG_FIELD(MT6370_REG_RGB2_DIM, 5, 6),
+ [F_LED3_MODE] = REG_FIELD(MT6370_REG_RGB3_DIM, 5, 6),
+ [F_LED4_MODE] = REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 5, 6),
+ [F_LED1_DUTY] = REG_FIELD(MT6370_REG_RGB1_DIM, 0, 4),
+ [F_LED2_DUTY] = REG_FIELD(MT6370_REG_RGB2_DIM, 0, 4),
+ [F_LED3_DUTY] = REG_FIELD(MT6370_REG_RGB3_DIM, 0, 4),
+ [F_LED4_DUTY] = REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 0, 4),
+ [F_LED1_FREQ] = REG_FIELD(MT6370_REG_RGB1_ISNK, 3, 5),
+ [F_LED2_FREQ] = REG_FIELD(MT6370_REG_RGB2_ISNK, 3, 5),
+ [F_LED3_FREQ] = REG_FIELD(MT6370_REG_RGB3_ISNK, 3, 5),
+ [F_LED4_FREQ] = REG_FIELD(MT6370_REG_RGB_CHRIND_CTRL, 2, 4),
+};
+
+static const struct reg_field mt6372_reg_fields[F_MAX_FIELDS] = {
+ [F_RGB_EN] = REG_FIELD(MT6372_REG_RGB_EN, 4, 7),
+ [F_CHGIND_EN] = REG_FIELD(MT6372_REG_RGB_EN, 3, 3),
+ [F_LED1_CURR] = REG_FIELD(MT6372_REG_RGB1_ISNK, 0, 3),
+ [F_LED2_CURR] = REG_FIELD(MT6372_REG_RGB2_ISNK, 0, 3),
+ [F_LED3_CURR] = REG_FIELD(MT6372_REG_RGB3_ISNK, 0, 3),
+ [F_LED4_CURR] = REG_FIELD(MT6372_REG_RGB4_ISNK, 0, 3),
+ [F_LED1_MODE] = REG_FIELD(MT6372_REG_RGB1_ISNK, 6, 7),
+ [F_LED2_MODE] = REG_FIELD(MT6372_REG_RGB2_ISNK, 6, 7),
+ [F_LED3_MODE] = REG_FIELD(MT6372_REG_RGB3_ISNK, 6, 7),
+ [F_LED4_MODE] = REG_FIELD(MT6372_REG_RGB4_ISNK, 6, 7),
+ [F_LED1_DUTY] = REG_FIELD(MT6372_REG_RGB1_DIM, 0, 7),
+ [F_LED2_DUTY] = REG_FIELD(MT6372_REG_RGB2_DIM, 0, 7),
+ [F_LED3_DUTY] = REG_FIELD(MT6372_REG_RGB3_DIM, 0, 7),
+ [F_LED4_DUTY] = REG_FIELD(MT6372_REG_RGB4_DIM, 0, 7),
+ [F_LED1_FREQ] = REG_FIELD(MT6372_REG_RGB12_FREQ, 5, 7),
+ [F_LED2_FREQ] = REG_FIELD(MT6372_REG_RGB12_FREQ, 2, 4),
+ [F_LED3_FREQ] = REG_FIELD(MT6372_REG_RGB34_FREQ, 5, 7),
+ [F_LED4_FREQ] = REG_FIELD(MT6372_REG_RGB34_FREQ, 2, 4),
+};
+
+/* Current unit: microamp, time unit: millisecond */
+static const struct linear_range common_led_ranges[R_MAX_RANGES] = {
+ [R_LED123_CURR] = { 4000, 1, 6, 4000 },
+ [R_LED4_CURR] = { 2000, 1, 3, 2000 },
+ [R_LED_TRFON] = { 125, 0, 15, 200 },
+ [R_LED_TOFF] = { 250, 0, 15, 400 },
+};
+
+static const struct linear_range mt6372_led_ranges[R_MAX_RANGES] = {
+ [R_LED123_CURR] = { 2000, 1, 14, 2000 },
+ [R_LED4_CURR] = { 2000, 1, 14, 2000 },
+ [R_LED_TRFON] = { 125, 0, 15, 250 },
+ [R_LED_TOFF] = { 250, 0, 15, 500 },
+};
+
+static const unsigned int common_tfreqs[] = {
+ 10000, 5000, 2000, 1000, 500, 200, 5, 1,
+};
+
+static const unsigned int mt6372_tfreqs[] = {
+ 8000, 4000, 2000, 1000, 500, 250, 8, 4,
+};
+
+static const struct mt6370_pdata common_pdata = {
+ .tfreq = common_tfreqs,
+ .tfreq_len = ARRAY_SIZE(common_tfreqs),
+ .pwm_duty = MT6370_PWM_DUTY,
+ .reg_rgb1_tr = MT6370_REG_RGB1_TR,
+ .reg_rgb_chrind_tr = MT6370_REG_RGB_CHRIND_TR,
+};
+
+static const struct mt6370_pdata mt6372_pdata = {
+ .tfreq = mt6372_tfreqs,
+ .tfreq_len = ARRAY_SIZE(mt6372_tfreqs),
+ .pwm_duty = MT6372_PWM_DUTY,
+ .reg_rgb1_tr = MT6372_REG_RGB1_TR,
+ .reg_rgb_chrind_tr = -1,
+};
+
+static enum mt6370_led_field mt6370_get_led_current_field(unsigned int led_no)
+{
+ switch (led_no) {
+ case MT6370_LED_ISNK1:
+ return F_LED1_CURR;
+ case MT6370_LED_ISNK2:
+ return F_LED2_CURR;
+ case MT6370_LED_ISNK3:
+ return F_LED3_CURR;
+ default:
+ return F_LED4_CURR;
+ }
+}
+
+static int mt6370_set_led_brightness(struct mt6370_priv *priv,
+ unsigned int led_no, unsigned int level)
+{
+ enum mt6370_led_field sel_field;
+
+ sel_field = mt6370_get_led_current_field(led_no);
+
+ return regmap_field_write(priv->fields[sel_field], level);
+}
+
+static int mt6370_get_led_brightness(struct mt6370_priv *priv,
+ unsigned int led_no, unsigned int *level)
+{
+ enum mt6370_led_field sel_field;
+
+ sel_field = mt6370_get_led_current_field(led_no);
+
+ return regmap_field_read(priv->fields[sel_field], level);
+}
+
+static int mt6370_set_led_duty(struct mt6370_priv *priv, unsigned int led_no,
+ unsigned int ton, unsigned int toff)
+{
+ const struct mt6370_pdata *pdata = priv->pdata;
+ enum mt6370_led_field sel_field;
+ unsigned int divisor, ratio;
+
+ divisor = pdata->pwm_duty;
+ ratio = ton * divisor / (ton + toff);
+
+ switch (led_no) {
+ case MT6370_LED_ISNK1:
+ sel_field = F_LED1_DUTY;
+ break;
+ case MT6370_LED_ISNK2:
+ sel_field = F_LED2_DUTY;
+ break;
+ case MT6370_LED_ISNK3:
+ sel_field = F_LED3_DUTY;
+ break;
+ default:
+ sel_field = F_LED4_DUTY;
+ break;
+ }
+
+ return regmap_field_write(priv->fields[sel_field], ratio);
+}
+
+static int mt6370_set_led_freq(struct mt6370_priv *priv, unsigned int led_no,
+ unsigned int ton, unsigned int toff)
+{
+ const struct mt6370_pdata *pdata = priv->pdata;
+ enum mt6370_led_field sel_field;
+ unsigned int tfreq_len = pdata->tfreq_len;
+ unsigned int tsum, sel;
+
+ tsum = ton + toff;
+
+ if (tsum > pdata->tfreq[0] || tsum < pdata->tfreq[tfreq_len - 1])
+ return -EOPNOTSUPP;
+
+ sel = find_closest_descending(tsum, pdata->tfreq, tfreq_len);
+
+ switch (led_no) {
+ case MT6370_LED_ISNK1:
+ sel_field = F_LED1_FREQ;
+ break;
+ case MT6370_LED_ISNK2:
+ sel_field = F_LED2_FREQ;
+ break;
+ case MT6370_LED_ISNK3:
+ sel_field = F_LED3_FREQ;
+ break;
+ default:
+ sel_field = F_LED4_FREQ;
+ break;
+ }
+
+ return regmap_field_write(priv->fields[sel_field], sel);
+}
+
+static void mt6370_get_breath_reg_base(struct mt6370_priv *priv,
+ unsigned int led_no, unsigned int *base)
+{
+ const struct mt6370_pdata *pdata = priv->pdata;
+
+ if (pdata->reg_rgb_chrind_tr < 0) {
+ *base = pdata->reg_rgb1_tr + led_no * 3;
+ return;
+ }
+
+ switch (led_no) {
+ case MT6370_LED_ISNK1:
+ case MT6370_LED_ISNK2:
+ case MT6370_LED_ISNK3:
+ *base = pdata->reg_rgb1_tr + led_no * 3;
+ break;
+ default:
+ *base = pdata->reg_rgb_chrind_tr;
+ break;
+ }
+}
+
+static int mt6370_gen_breath_pattern(struct mt6370_priv *priv,
+ struct led_pattern *pattern, u32 len,
+ u8 *pattern_val, u32 val_len)
+{
+ enum mt6370_led_ranges sel_range;
+ struct led_pattern *curr;
+ unsigned int sel;
+ u32 val = 0;
+ int i;
+
+ if (len < P_MAX_PATTERNS && val_len < P_MAX_PATTERNS / 2)
+ return -EINVAL;
+
+ /*
+ * Pattern list
+ * tr1: byte 0, b'[7: 4]
+ * tr2: byte 0, b'[3: 0]
+ * tf1: byte 1, b'[7: 4]
+ * tf2: byte 1, b'[3: 0]
+ * ton: byte 2, b'[7: 4]
+ * toff: byte 2, b'[3: 0]
+ */
+ for (i = 0; i < P_MAX_PATTERNS; i++) {
+ curr = pattern + i;
+
+ sel_range = i == P_LED_TOFF ? R_LED_TOFF : R_LED_TRFON;
+
+ linear_range_get_selector_within(priv->ranges + sel_range,
+ curr->delta_t, &sel);
+
+ if (i % 2) {
+ val |= sel;
+ } else {
+ val <<= 8;
+ val |= sel << 4;
+ }
+ }
+
+ put_unaligned_be24(val, pattern_val);
+
+ return 0;
+}
+
+static int mt6370_set_led_mode(struct mt6370_priv *priv, unsigned int led_no,
+ enum mt6370_led_mode mode)
+{
+ enum mt6370_led_field sel_field;
+
+ switch (led_no) {
+ case MT6370_LED_ISNK1:
+ sel_field = F_LED1_MODE;
+ break;
+ case MT6370_LED_ISNK2:
+ sel_field = F_LED2_MODE;
+ break;
+ case MT6370_LED_ISNK3:
+ sel_field = F_LED3_MODE;
+ break;
+ default:
+ sel_field = F_LED4_MODE;
+ break;
+ }
+
+ return regmap_field_write(priv->fields[sel_field], mode);
+}
+
+static int mt6370_mc_brightness_set(struct led_classdev *lcdev,
+ enum led_brightness level)
+{
+ struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
+ struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
+ struct mt6370_priv *priv = led->priv;
+ struct mc_subled *subled;
+ unsigned int enable, disable;
+ int i, ret;
+
+ mutex_lock(&priv->lock);
+
+ led_mc_calc_color_components(mccdev, level);
+
+ ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+ if (ret)
+ goto out_unlock;
+
+ disable = enable;
+
+ for (i = 0; i < mccdev->num_colors; i++) {
+ u32 brightness;
+
+ subled = mccdev->subled_info + i;
+ brightness = min(subled->brightness, lcdev->max_brightness);
+ disable &= ~MT6370_CHEN_BIT(subled->channel);
+
+ if (level == 0) {
+ enable &= ~MT6370_CHEN_BIT(subled->channel);
+
+ ret = mt6370_set_led_mode(priv, subled->channel,
+ MT6370_LED_REG_MODE);
+ if (ret)
+ goto out_unlock;
+
+ continue;
+ }
+
+ if (brightness == 0) {
+ enable &= ~MT6370_CHEN_BIT(subled->channel);
+ continue;
+ }
+
+ enable |= MT6370_CHEN_BIT(subled->channel);
+
+ ret = mt6370_set_led_brightness(priv, subled->channel,
+ brightness);
+ if (ret)
+ goto out_unlock;
+ }
+
+ ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
+
+out_unlock:
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static int mt6370_mc_blink_set(struct led_classdev *lcdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
+ struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
+ struct mt6370_priv *priv = led->priv;
+ struct mc_subled *subled;
+ unsigned int enable, disable;
+ int i, ret;
+
+ mutex_lock(&priv->lock);
+
+ if (!*delay_on && !*delay_off)
+ *delay_on = *delay_off = 500;
+
+ ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+ if (ret)
+ goto out_unlock;
+
+ disable = enable;
+
+ for (i = 0; i < mccdev->num_colors; i++) {
+ subled = mccdev->subled_info + i;
+
+ disable &= ~MT6370_CHEN_BIT(subled->channel);
+
+ ret = mt6370_set_led_duty(priv, subled->channel, *delay_on,
+ *delay_off);
+ if (ret)
+ goto out_unlock;
+
+ ret = mt6370_set_led_freq(priv, subled->channel, *delay_on,
+ *delay_off);
+ if (ret)
+ goto out_unlock;
+
+ ret = mt6370_set_led_mode(priv, subled->channel,
+ MT6370_LED_PWM_MODE);
+ if (ret)
+ goto out_unlock;
+ }
+
+ /* Toggle to make pattern timing the same */
+ ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
+
+out_unlock:
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static int mt6370_mc_pattern_set(struct led_classdev *lcdev,
+ struct led_pattern *pattern, u32 len, int repeat)
+{
+ struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
+ struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
+ struct mt6370_priv *priv = led->priv;
+ struct mc_subled *subled;
+ unsigned int reg_base, enable, disable;
+ u8 params[P_MAX_PATTERNS / 2];
+ int i, ret;
+
+ mutex_lock(&priv->lock);
+
+ ret = mt6370_gen_breath_pattern(priv, pattern, len, params,
+ sizeof(params));
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+ if (ret)
+ goto out_unlock;
+
+ disable = enable;
+
+ for (i = 0; i < mccdev->num_colors; i++) {
+ subled = mccdev->subled_info + i;
+
+ mt6370_get_breath_reg_base(priv, subled->channel, &reg_base);
+ disable &= ~MT6370_CHEN_BIT(subled->channel);
+
+ ret = regmap_raw_write(priv->regmap, reg_base, params,
+ sizeof(params));
+ if (ret)
+ goto out_unlock;
+
+ ret = mt6370_set_led_mode(priv, subled->channel,
+ MT6370_LED_BREATH_MODE);
+ if (ret)
+ goto out_unlock;
+ }
+
+ /* Toggle to make pattern timing be the same */
+ ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
+
+out_unlock:
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static inline int mt6370_mc_pattern_clear(struct led_classdev *lcdev)
+{
+ struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
+ struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
+ struct mt6370_priv *priv = led->priv;
+ struct mc_subled *subled;
+ int i, ret;
+
+ mutex_lock(&led->priv->lock);
+
+ for (i = 0; i < mccdev->num_colors; i++) {
+ subled = mccdev->subled_info + i;
+
+ ret = mt6370_set_led_mode(priv, subled->channel,
+ MT6370_LED_REG_MODE);
+ if (ret)
+ break;
+ }
+
+ mutex_unlock(&led->priv->lock);
+
+ return ret;
+}
+
+static int mt6370_isnk_brightness_set(struct led_classdev *lcdev,
+ enum led_brightness level)
+{
+ struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
+ struct mt6370_priv *priv = led->priv;
+ unsigned int enable;
+ int ret;
+
+ mutex_lock(&priv->lock);
+
+ ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+ if (ret)
+ goto out_unlock;
+
+ if (level == 0) {
+ enable &= ~MT6370_CHEN_BIT(led->index);
+
+ ret = mt6370_set_led_mode(priv, led->index,
+ MT6370_LED_REG_MODE);
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
+ } else {
+ enable |= MT6370_CHEN_BIT(led->index);
+
+ ret = mt6370_set_led_brightness(priv, led->index, level);
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
+ }
+
+out_unlock:
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static int mt6370_isnk_blink_set(struct led_classdev *lcdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
+ struct mt6370_priv *priv = led->priv;
+ int ret;
+
+ mutex_lock(&priv->lock);
+
+ if (!*delay_on && !*delay_off)
+ *delay_on = *delay_off = 500;
+
+ ret = mt6370_set_led_duty(priv, led->index, *delay_on, *delay_off);
+ if (ret)
+ goto out_unlock;
+
+ ret = mt6370_set_led_freq(priv, led->index, *delay_on, *delay_off);
+ if (ret)
+ goto out_unlock;
+
+ ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_PWM_MODE);
+
+out_unlock:
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static int mt6370_isnk_pattern_set(struct led_classdev *lcdev,
+ struct led_pattern *pattern, u32 len,
+ int repeat)
+{
+ struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
+ struct mt6370_priv *priv = led->priv;
+ unsigned int reg_base;
+ u8 params[P_MAX_PATTERNS / 2];
+ int ret;
+
+ mutex_lock(&priv->lock);
+
+ ret = mt6370_gen_breath_pattern(priv, pattern, len, params,
+ sizeof(params));
+ if (ret)
+ goto out_unlock;
+
+ mt6370_get_breath_reg_base(priv, led->index, &reg_base);
+
+ ret = regmap_raw_write(priv->regmap, reg_base, params, sizeof(params));
+ if (ret)
+ goto out_unlock;
+
+ ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_BREATH_MODE);
+
+out_unlock:
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static inline int mt6370_isnk_pattern_clear(struct led_classdev *lcdev)
+{
+ struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
+ struct mt6370_priv *priv = led->priv;
+ int ret;
+
+ mutex_lock(&led->priv->lock);
+ ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_REG_MODE);
+ mutex_unlock(&led->priv->lock);
+
+ return ret;
+}
+
+static int mt6370_init_led_properties(struct mt6370_led *led,
+ struct led_init_data *init_data)
+{
+ struct mt6370_priv *priv = led->priv;
+ struct device *dev = priv->dev;
+ struct led_classdev *lcdev;
+ struct fwnode_handle *child;
+ enum mt6370_led_ranges sel_range;
+ u32 max_uA, max_level;
+ int ret;
+
+ if (led->index == MT6370_VIRTUAL_MULTICOLOR) {
+ struct mc_subled *sub_led;
+ u32 num_color = 0;
+
+ sub_led = devm_kcalloc(dev, MC_CHANNEL_NUM, sizeof(*sub_led),
+ GFP_KERNEL);
+ if (!sub_led)
+ return -ENOMEM;
+
+ fwnode_for_each_child_node(init_data->fwnode, child) {
+ u32 reg, color;
+
+ ret = fwnode_property_read_u32(child, "reg", &reg);
+ if (ret || reg > MT6370_LED_ISNK3 ||
+ priv->leds_active & BIT(reg))
+ return -EINVAL;
+
+ ret = fwnode_property_read_u32(child, "color", &color);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "LED %d, no color specified\n",
+ led->index);
+
+ priv->leds_active |= BIT(reg);
+ sub_led[num_color].color_index = color;
+ sub_led[num_color].channel = reg;
+ sub_led[num_color].intensity = 0;
+ num_color++;
+ }
+
+ if (num_color < 2)
+ return dev_err_probe(dev, -EINVAL,
+ "Multicolor must include 2 or more LED channels\n");
+
+ led->mc.num_colors = num_color;
+ led->mc.subled_info = sub_led;
+
+ lcdev = &led->mc.led_cdev;
+ lcdev->brightness_set_blocking = mt6370_mc_brightness_set;
+ lcdev->blink_set = mt6370_mc_blink_set;
+ lcdev->pattern_set = mt6370_mc_pattern_set;
+ lcdev->pattern_clear = mt6370_mc_pattern_clear;
+ } else {
+ lcdev = &led->isink;
+ lcdev->brightness_set_blocking = mt6370_isnk_brightness_set;
+ lcdev->blink_set = mt6370_isnk_blink_set;
+ lcdev->pattern_set = mt6370_isnk_pattern_set;
+ lcdev->pattern_clear = mt6370_isnk_pattern_clear;
+ }
+
+ ret = fwnode_property_read_u32(init_data->fwnode, "led-max-microamp",
+ &max_uA);
+ if (ret) {
+ dev_warn(dev,
+ "Not specified led-max-microamp, config to the minimum\n");
+ max_uA = 0;
+ }
+
+ if (led->index == MT6370_LED_ISNK4)
+ sel_range = R_LED4_CURR;
+ else
+ sel_range = R_LED123_CURR;
+
+ linear_range_get_selector_within(priv->ranges + sel_range, max_uA,
+ &max_level);
+
+ lcdev->max_brightness = max_level;
+
+ fwnode_property_read_string(init_data->fwnode, "linux,default-trigger",
+ &lcdev->default_trigger);
+
+ led->default_state = led_init_default_state_get(init_data->fwnode);
+
+ return 0;
+}
+
+static int mt6370_isnk_init_default_state(struct mt6370_led *led)
+{
+ struct mt6370_priv *priv = led->priv;
+ unsigned int enable, level;
+ int ret;
+
+ ret = mt6370_get_led_brightness(priv, led->index, &level);
+ if (ret)
+ return ret;
+
+ ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+ if (ret)
+ return ret;
+
+ if (!(enable & MT6370_CHEN_BIT(led->index)))
+ level = 0;
+
+ switch (led->default_state) {
+ case LEDS_DEFSTATE_ON:
+ led->isink.brightness = led->isink.max_brightness;
+ break;
+ case LEDS_DEFSTATE_KEEP:
+ led->isink.brightness = min(level, led->isink.max_brightness);
+ break;
+ default:
+ led->isink.brightness = 0;
+ break;
+ }
+
+ return mt6370_isnk_brightness_set(&led->isink, led->isink.brightness);
+}
+
+static int mt6370_led_register(struct device *parent, struct mt6370_led *led,
+ struct led_init_data *init_data)
+{
+ struct mt6370_priv *priv = led->priv;
+ int ret;
+
+ if (led->index == MT6370_VIRTUAL_MULTICOLOR) {
+ ret = mt6370_mc_brightness_set(&led->mc.led_cdev, 0);
+ if (ret)
+ return dev_err_probe(parent, ret,
+ "Couldn't set multicolor brightness\n");
+
+ ret = devm_led_classdev_multicolor_register_ext(parent,
+ &led->mc,
+ init_data);
+ if (ret)
+ return dev_err_probe(parent, ret,
+ "Couldn't register multicolor\n");
+ } else {
+ if (led->index == MT6370_LED_ISNK4) {
+ ret = regmap_field_write(priv->fields[F_CHGIND_EN], 1);
+ if (ret)
+ return dev_err_probe(parent, ret,
+ "Failed to set CHRIND to SW\n");
+ }
+
+ ret = mt6370_isnk_init_default_state(led);
+ if (ret)
+ return dev_err_probe(parent, ret,
+ "Failed to init %d isnk state\n",
+ led->index);
+
+ ret = devm_led_classdev_register_ext(parent, &led->isink,
+ init_data);
+ if (ret)
+ return dev_err_probe(parent, ret,
+ "Couldn't register isink %d\n",
+ led->index);
+ }
+
+ return 0;
+}
+
+static int mt6370_check_vendor_info(struct mt6370_priv *priv)
+{
+ unsigned int devinfo, vid;
+ int ret;
+
+ ret = regmap_read(priv->regmap, MT6370_REG_DEV_INFO, &devinfo);
+ if (ret)
+ return ret;
+
+ vid = FIELD_GET(MT6370_VENID_MASK, devinfo);
+ if (vid == 0x9 || vid == 0xb) {
+ priv->reg_fields = mt6372_reg_fields;
+ priv->ranges = mt6372_led_ranges;
+ priv->pdata = &mt6372_pdata;
+ } else {
+ /* Common for MT6370/71 */
+ priv->reg_fields = common_reg_fields;
+ priv->ranges = common_led_ranges;
+ priv->pdata = &common_pdata;
+ }
+
+ return 0;
+}
+
+static int mt6370_leds_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mt6370_priv *priv;
+ struct fwnode_handle *child;
+ size_t count;
+ unsigned int i = 0;
+ int ret;
+
+ count = device_get_child_node_count(dev);
+ if (!count || count > MT6370_MAX_LEDS)
+ return dev_err_probe(dev, -EINVAL,
+ "No child node or node count over max LED number %zu\n",
+ count);
+
+ priv = devm_kzalloc(dev, struct_size(priv, leds, count), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->leds_count = count;
+ priv->dev = dev;
+ mutex_init(&priv->lock);
+
+ priv->regmap = dev_get_regmap(dev->parent, NULL);
+ if (!priv->regmap)
+ return dev_err_probe(dev, -ENODEV, "Failed to get parent regmap\n");
+
+ ret = mt6370_check_vendor_info(priv);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to check vendor info\n");
+
+ ret = devm_regmap_field_bulk_alloc(dev, priv->regmap, priv->fields,
+ priv->reg_fields, F_MAX_FIELDS);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to allocate regmap field\n");
+
+ device_for_each_child_node(dev, child) {
+ struct mt6370_led *led = priv->leds + i++;
+ struct led_init_data init_data = { .fwnode = child };
+ u32 reg, color;
+
+ ret = fwnode_property_read_u32(child, "reg", &reg);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to parse reg property\n");
+
+ if (reg >= MT6370_MAX_LEDS)
+ return dev_err_probe(dev, -EINVAL, "Error reg property number\n");
+
+ ret = fwnode_property_read_u32(child, "color", &color);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to parse color property\n");
+
+ if (color == LED_COLOR_ID_RGB || color == LED_COLOR_ID_MULTI)
+ reg = MT6370_VIRTUAL_MULTICOLOR;
+
+ if (priv->leds_active & BIT(reg))
+ return dev_err_probe(dev, -EINVAL, "Duplicate reg property\n");
+
+ priv->leds_active |= BIT(reg);
+
+ led->index = reg;
+ led->priv = priv;
+
+ ret = mt6370_init_led_properties(led, &init_data);
+ if (ret)
+ return ret;
+
+ ret = mt6370_led_register(&pdev->dev, led, &init_data);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct of_device_id mt6370_rgbled_device_table[] = {
+ { .compatible = "mediatek,mt6370-indicator" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, mt6370_rgbled_device_table);
+
+static struct platform_driver mt6370_rgbled_driver = {
+ .driver = {
+ .name = "mt6370-indicator",
+ .of_match_table = mt6370_rgbled_device_table,
+ },
+ .probe = mt6370_leds_probe,
+};
+module_platform_driver(mt6370_rgbled_driver);
+
+MODULE_AUTHOR("Alice Chen <[email protected]>");
+MODULE_AUTHOR("ChiYuan Huang <[email protected]>");
+MODULE_DESCRIPTION("MediaTek MT6370 RGB LED Driver");
+MODULE_LICENSE("GPL v2");
--
2.7.4

2022-09-06 09:21:26

by ChiaEn Wu

[permalink] [raw]

Subject: [PATCH v10 8/8] leds: flash: mt6370: Add MediaTek MT6370 flashlight support

From: Alice Chen <[email protected]>

The MediaTek MT6370 is a highly-integrated smart power management IC,
which includes a single cell Li-Ion/Li-Polymer switching battery
charger, a USB Type-C & Power Delivery (PD) controller, dual Flash
LED current sources, a RGB LED driver, a backlight WLED driver,
a display bias driver and a general LDO for portable devices.

Add support for the MT6370 Flash LED driver. Flash LED in MT6370
has 2 channels and support torch/strobe mode.

Signed-off-by: Alice Chen <[email protected]>
Signed-off-by: ChiaEn Wu <[email protected]>
---

v10:
- Add the revert code when '__mt6370_flash_brightness_set()' return
failed.
- Revise type of 'led_no' (u32 -> u8)
- Revise type of 'default_state' (u32 -> enum led_default_state)
- Revise the return value of '_mt6370_flash_brightness_set()'
- Remove the useless function 'mt6370_init_common_properties()'
- Use 'led_init_default_state_get()' to init 'led->default_state'
---
drivers/leds/flash/Kconfig | 14 +
drivers/leds/flash/Makefile | 1 +
drivers/leds/flash/leds-mt6370-flash.c | 630 +++++++++++++++++++++++++++++++++
3 files changed, 645 insertions(+)
create mode 100644 drivers/leds/flash/leds-mt6370-flash.c

diff --git a/drivers/leds/flash/Kconfig b/drivers/leds/flash/Kconfig
index d3eb689..405bd16 100644
--- a/drivers/leds/flash/Kconfig
+++ b/drivers/leds/flash/Kconfig
@@ -61,6 +61,20 @@ config LEDS_MT6360
Independent current sources supply for each flash LED support torch
and strobe mode.

+config LEDS_MT6370_FLASH
+ tristate "Flash LED Support for MediaTek MT6370 PMIC"
+ depends on LEDS_CLASS && OF
+ depends on LEDS_CLASS_FLASH || !LEDS_CLASS_FLASH
+ depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
+ depends on MFD_MT6370
+ help
+ Support 2 channels and torch/strobe mode.
+ Say Y here to enable support for
+ MT6370_FLASH_LED device.
+
+ This driver can also be built as a module. If so, the module
+ will be called "leds-mt6370-flash".
+
config LEDS_RT4505
tristate "LED support for RT4505 flashlight controller"
depends on I2C && OF
diff --git a/drivers/leds/flash/Makefile b/drivers/leds/flash/Makefile
index 0acbddc..0c1f3c5 100644
--- a/drivers/leds/flash/Makefile
+++ b/drivers/leds/flash/Makefile
@@ -9,3 +9,4 @@ obj-$(CONFIG_LEDS_MAX77693) += leds-max77693.o
obj-$(CONFIG_LEDS_RT4505) += leds-rt4505.o
obj-$(CONFIG_LEDS_RT8515) += leds-rt8515.o
obj-$(CONFIG_LEDS_SGM3140) += leds-sgm3140.o
+obj-$(CONFIG_LEDS_MT6370_FLASH) += leds-mt6370-flash.o
diff --git a/drivers/leds/flash/leds-mt6370-flash.c b/drivers/leds/flash/leds-mt6370-flash.c
new file mode 100644
index 0000000..03fa816
--- /dev/null
+++ b/drivers/leds/flash/leds-mt6370-flash.c
@@ -0,0 +1,630 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Author: Alice Chen <[email protected]>
+ */
+
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/led-class-flash.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+
+#include <media/v4l2-flash-led-class.h>
+
+enum {
+ MT6370_LED_FLASH1,
+ MT6370_LED_FLASH2,
+ MT6370_MAX_LEDS
+};
+
+/* Virtual definition for multicolor */
+
+#define MT6370_REG_FLEDEN 0x17E
+#define MT6370_REG_STRBTO 0x173
+#define MT6370_REG_CHGSTAT2 0x1D1
+#define MT6370_REG_FLEDSTAT1 0x1D9
+#define MT6370_REG_FLEDISTRB(_id) (0x174 + 4 * (_id))
+#define MT6370_REG_FLEDITOR(_id) (0x175 + 4 * (_id))
+#define MT6370_ITORCH_MASK GENMASK(4, 0)
+#define MT6370_ISTROBE_MASK GENMASK(6, 0)
+#define MT6370_STRBTO_MASK GENMASK(6, 0)
+#define MT6370_TORCHEN_MASK BIT(3)
+#define MT6370_STROBEN_MASK BIT(2)
+#define MT6370_FLCSEN_MASK(_id) BIT(MT6370_LED_FLASH2 - (_id))
+#define MT6370_FLCSEN_MASK_ALL GENMASK(1, 0)
+#define MT6370_FLEDCHGVINOVP_MASK BIT(3)
+#define MT6370_FLED1STRBTO_MASK BIT(11)
+#define MT6370_FLED2STRBTO_MASK BIT(10)
+#define MT6370_FLED1STRB_MASK BIT(9)
+#define MT6370_FLED2STRB_MASK BIT(8)
+#define MT6370_FLED1SHORT_MASK BIT(7)
+#define MT6370_FLED2SHORT_MASK BIT(6)
+#define MT6370_FLEDLVF_MASK BIT(3)
+
+#define MT6370_LED_JOINT 2
+#define MT6370_RANGE_FLED_REG 4
+#define MT6370_ITORCH_MIN_uA 25000
+#define MT6370_ITORCH_STEP_uA 12500
+#define MT6370_ITORCH_MAX_uA 400000
+#define MT6370_ITORCH_DOUBLE_MAX_uA 800000
+#define MT6370_ISTRB_MIN_uA 50000
+#define MT6370_ISTRB_STEP_uA 12500
+#define MT6370_ISTRB_MAX_uA 1500000
+#define MT6370_ISTRB_DOUBLE_MAX_uA 3000000
+#define MT6370_STRBTO_MIN_US 64000
+#define MT6370_STRBTO_STEP_US 32000
+#define MT6370_STRBTO_MAX_US 2432000
+
+#define STATE_OFF 0
+#define STATE_KEEP 1
+#define STATE_ON 2
+
+#define to_mt6370_led(ptr, member) container_of(ptr, struct mt6370_led, member)
+
+struct mt6370_led {
+ struct led_classdev_flash flash;
+ struct v4l2_flash *v4l2_flash;
+ struct mt6370_priv *priv;
+ enum led_default_state default_state;
+ u8 led_no;
+};
+
+struct mt6370_priv {
+ struct device *dev;
+ struct regmap *regmap;
+ struct mutex lock;
+ unsigned int fled_strobe_used;
+ unsigned int fled_torch_used;
+ unsigned int leds_active;
+ unsigned int leds_count;
+ struct mt6370_led leds[];
+};
+
+static int mt6370_torch_brightness_set(struct led_classdev *lcdev,
+ enum led_brightness level)
+{
+ struct mt6370_led *led = to_mt6370_led(lcdev, flash.led_cdev);
+ struct mt6370_priv *priv = led->priv;
+ u32 led_enable_mask = (led->led_no == MT6370_LED_JOINT) ?
+ MT6370_FLCSEN_MASK_ALL :
+ MT6370_FLCSEN_MASK(led->led_no);
+ u32 enable_mask = MT6370_TORCHEN_MASK | led_enable_mask;
+ u32 val = level ? led_enable_mask : 0;
+ u32 curr;
+ int ret, i;
+
+ mutex_lock(&priv->lock);
+
+ /*
+ * There is only one set of flash control logic, and this
+ * flag is used to check if 'strobe' is currently being used.
+ */
+ if (priv->fled_strobe_used) {
+ dev_warn(lcdev->dev, "Please disable strobe first [%d]\n",
+ priv->fled_strobe_used);
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ if (level)
+ curr = priv->fled_torch_used | BIT(led->led_no);
+ else
+ curr = priv->fled_torch_used & ~BIT(led->led_no);
+
+ if (curr)
+ val |= MT6370_TORCHEN_MASK;
+
+ if (level) {
+ level -= 1;
+ if (led->led_no == MT6370_LED_JOINT) {
+ u32 flevel[MT6370_MAX_LEDS];
+
+ flevel[0] = level / 2;
+ flevel[1] = level - flevel[0];
+ for (i = 0; i < MT6370_MAX_LEDS; i++) {
+ ret = regmap_update_bits(priv->regmap,
+ MT6370_REG_FLEDITOR(i),
+ MT6370_ITORCH_MASK, flevel[i]);
+ if (ret)
+ goto unlock;
+ }
+ } else {
+ ret = regmap_update_bits(priv->regmap,
+ MT6370_REG_FLEDITOR(led->led_no),
+ MT6370_ITORCH_MASK, level);
+ if (ret)
+ goto unlock;
+ }
+ }
+
+ ret = regmap_update_bits(priv->regmap, MT6370_REG_FLEDEN,
+ enable_mask, val);
+ if (ret)
+ goto unlock;
+
+ priv->fled_torch_used = curr;
+
+unlock:
+ mutex_unlock(&priv->lock);
+ return ret;
+}
+
+static int mt6370_flash_brightness_set(struct led_classdev_flash *fl_cdev,
+ u32 brightness)
+{
+ /*
+ * Because of the current spikes when turning on the flash,
+ * the brightness should be kept by the LED framework. This
+ * empty function is used to prevent checking failure when
+ * led_classdev_flash registers ops.
+ */
+ return 0;
+}
+
+static int _mt6370_flash_brightness_set(struct led_classdev_flash *fl_cdev,
+ u32 brightness)
+{
+ struct mt6370_led *led = to_mt6370_led(fl_cdev, flash);
+ struct mt6370_priv *priv = led->priv;
+ struct led_flash_setting *s = &fl_cdev->brightness;
+ u32 val = (brightness - s->min) / s->step;
+ int ret, i;
+
+ if (led->led_no == MT6370_LED_JOINT) {
+ u32 flevel[MT6370_MAX_LEDS];
+
+ flevel[0] = val / 2;
+ flevel[1] = val - flevel[0];
+ for (i = 0; i < MT6370_MAX_LEDS; i++) {
+ ret = regmap_update_bits(priv->regmap,
+ MT6370_REG_FLEDISTRB(i),
+ MT6370_ISTROBE_MASK, flevel[i]);
+ if (ret)
+ break;
+ }
+
+ return ret;
+ } else {
+ return regmap_update_bits(priv->regmap,
+ MT6370_REG_FLEDISTRB(led->led_no),
+ MT6370_ISTROBE_MASK, val);
+ }
+}
+
+static int mt6370_strobe_set(struct led_classdev_flash *fl_cdev, bool state)
+{
+ struct mt6370_led *led = to_mt6370_led(fl_cdev, flash);
+ struct mt6370_priv *priv = led->priv;
+ struct led_classdev *lcdev = &fl_cdev->led_cdev;
+ struct led_flash_setting *s = &fl_cdev->brightness;
+ u32 led_enable_mask = (led->led_no == MT6370_LED_JOINT) ?
+ MT6370_FLCSEN_MASK_ALL :
+ MT6370_FLCSEN_MASK(led->led_no);
+ u32 enable_mask = MT6370_STROBEN_MASK | led_enable_mask;
+ u32 val = state ? led_enable_mask : 0;
+ u32 curr;
+ int ret;
+
+ mutex_lock(&priv->lock);
+
+ /*
+ * There is only one set of flash control logic, and this
+ * flag is used to check if 'torch' is currently being used.
+ */
+ if (priv->fled_torch_used) {
+ dev_warn(lcdev->dev, "Please disable torch first [0x%x]\n",
+ priv->fled_torch_used);
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ if (state)
+ curr = priv->fled_strobe_used | BIT(led->led_no);
+ else
+ curr = priv->fled_strobe_used & ~BIT(led->led_no);
+
+ if (curr)
+ val |= MT6370_STROBEN_MASK;
+
+ ret = regmap_update_bits(priv->regmap, MT6370_REG_FLEDEN, enable_mask,
+ val);
+ if (ret) {
+ dev_err(lcdev->dev, "[%d] control current source %d fail\n",
+ led->led_no, state);
+ goto unlock;
+ }
+
+ /*
+ * If the flash needs to turn on, configure the flash current to
+ * ramp up to the setting value. Otherwise, always revert to the
+ * minimum one.
+ */
+ ret = _mt6370_flash_brightness_set(fl_cdev, state ? s->val : s->min);
+ if (ret) {
+ dev_err(lcdev->dev, "[%d] Failed to set brightness\n", led->led_no);
+ goto out_revert_state;
+ }
+
+ /*
+ * For the flash to turn on/off, we must wait for HW ramping
+ * up/down time 5ms/500us to prevent the unexpected problem.
+ */
+ if (!priv->fled_strobe_used && curr)
+ usleep_range(5000, 6000);
+ else if (priv->fled_strobe_used && !curr)
+ usleep_range(500, 600);
+
+ priv->fled_strobe_used = curr;
+
+out_revert_state:
+ if (state)
+ curr = priv->fled_strobe_used & ~BIT(led->led_no);
+ else
+ curr = priv->fled_strobe_used | BIT(led->led_no);
+
+ if (curr)
+ val |= MT6370_STROBEN_MASK;
+
+ ret = regmap_update_bits(priv->regmap, MT6370_REG_FLEDEN, enable_mask,
+ val);
+ if (ret)
+ dev_err(lcdev->dev, "[%d] revert current source fail\n", led->led_no);
+unlock:
+ mutex_unlock(&priv->lock);
+ return ret;
+}
+
+static int mt6370_strobe_get(struct led_classdev_flash *fl_cdev, bool *state)
+{
+ struct mt6370_led *led = to_mt6370_led(fl_cdev, flash);
+ struct mt6370_priv *priv = led->priv;
+
+ mutex_lock(&priv->lock);
+ *state = !!(priv->fled_strobe_used & BIT(led->led_no));
+ mutex_unlock(&priv->lock);
+
+ return 0;
+}
+
+static int mt6370_timeout_set(struct led_classdev_flash *fl_cdev, u32 timeout)
+{
+ struct mt6370_led *led = to_mt6370_led(fl_cdev, flash);
+ struct mt6370_priv *priv = led->priv;
+ struct led_flash_setting *s = &fl_cdev->timeout;
+ u32 val = (timeout - s->min) / s->step;
+ int ret;
+
+ mutex_lock(&priv->lock);
+ ret = regmap_update_bits(priv->regmap, MT6370_REG_STRBTO,
+ MT6370_STRBTO_MASK, val);
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static int mt6370_fault_get(struct led_classdev_flash *fl_cdev, u32 *fault)
+{
+ struct mt6370_led *led = to_mt6370_led(fl_cdev, flash);
+ struct mt6370_priv *priv = led->priv;
+ u16 fled_stat;
+ unsigned int chg_stat, strobe_timeout_mask, fled_short_mask;
+ u32 rfault = 0;
+ int ret;
+
+ mutex_lock(&priv->lock);
+ ret = regmap_read(priv->regmap, MT6370_REG_CHGSTAT2, &chg_stat);
+ if (ret)
+ goto unlock;
+
+ ret = regmap_raw_read(priv->regmap, MT6370_REG_FLEDSTAT1, &fled_stat,
+ sizeof(fled_stat));
+ if (ret)
+ goto unlock;
+
+ switch (led->led_no) {
+ case MT6370_LED_FLASH1:
+ strobe_timeout_mask = MT6370_FLED1STRBTO_MASK;
+ fled_short_mask = MT6370_FLED1SHORT_MASK;
+ break;
+
+ case MT6370_LED_FLASH2:
+ strobe_timeout_mask = MT6370_FLED2STRBTO_MASK;
+ fled_short_mask = MT6370_FLED2SHORT_MASK;
+ break;
+
+ case MT6370_LED_JOINT:
+ strobe_timeout_mask = MT6370_FLED1STRBTO_MASK |
+ MT6370_FLED2STRBTO_MASK;
+ fled_short_mask = MT6370_FLED1SHORT_MASK |
+ MT6370_FLED2SHORT_MASK;
+ }
+
+ if (chg_stat & MT6370_FLEDCHGVINOVP_MASK)
+ rfault |= LED_FAULT_INPUT_VOLTAGE;
+
+ if (fled_stat & strobe_timeout_mask)
+ rfault |= LED_FAULT_TIMEOUT;
+
+ if (fled_stat & fled_short_mask)
+ rfault |= LED_FAULT_SHORT_CIRCUIT;
+
+ if (fled_stat & MT6370_FLEDLVF_MASK)
+ rfault |= LED_FAULT_UNDER_VOLTAGE;
+
+ *fault = rfault;
+unlock:
+ mutex_unlock(&priv->lock);
+ return ret;
+}
+
+static const struct led_flash_ops mt6370_flash_ops = {
+ .flash_brightness_set = mt6370_flash_brightness_set,
+ .strobe_set = mt6370_strobe_set,
+ .strobe_get = mt6370_strobe_get,
+ .timeout_set = mt6370_timeout_set,
+ .fault_get = mt6370_fault_get,
+};
+
+#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
+static int mt6370_flash_external_strobe_set(struct v4l2_flash *v4l2_flash,
+ bool enable)
+{
+ struct led_classdev_flash *flash = v4l2_flash->fled_cdev;
+ struct mt6370_led *led = to_mt6370_led(flash, flash);
+ struct mt6370_priv *priv = led->priv;
+ u32 mask = (led->led_no == MT6370_LED_JOINT) ? MT6370_FLCSEN_MASK_ALL :
+ MT6370_FLCSEN_MASK(led->led_no);
+ u32 val = enable ? mask : 0;
+ int ret;
+
+ mutex_lock(&priv->lock);
+ ret = regmap_update_bits(priv->regmap, MT6370_REG_FLEDEN, mask, val);
+ if (ret)
+ goto unlock;
+
+ if (enable)
+ priv->fled_strobe_used |= BIT(led->led_no);
+ else
+ priv->fled_strobe_used &= ~BIT(led->led_no);
+
+unlock:
+ mutex_unlock(&priv->lock);
+ return ret;
+}
+
+static const struct v4l2_flash_ops v4l2_flash_ops = {
+ .external_strobe_set = mt6370_flash_external_strobe_set,
+};
+
+static void mt6370_init_v4l2_flash_config(struct mt6370_led *led,
+ struct v4l2_flash_config *config)
+{
+ struct led_classdev *lcdev;
+ struct led_flash_setting *s = &config->intensity;
+
+ lcdev = &led->flash.led_cdev;
+
+ s->min = MT6370_ITORCH_MIN_uA;
+ s->step = MT6370_ITORCH_STEP_uA;
+ s->val = s->max = s->min + (lcdev->max_brightness - 1) * s->step;
+
+ config->has_external_strobe = 1;
+ strscpy(config->dev_name, lcdev->dev->kobj.name,
+ sizeof(config->dev_name));
+
+ config->flash_faults = LED_FAULT_SHORT_CIRCUIT | LED_FAULT_TIMEOUT |
+ LED_FAULT_INPUT_VOLTAGE |
+ LED_FAULT_UNDER_VOLTAGE;
+}
+#else
+static const struct v4l2_flash_ops v4l2_flash_ops;
+static void mt6370_init_v4l2_flash_config(struct mt6370_led *led,
+ struct v4l2_flash_config *config)
+{
+}
+#endif
+
+static void mt6370_v4l2_flash_release(void *v4l2_flash)
+{
+ v4l2_flash_release(v4l2_flash);
+}
+
+static int mt6370_led_register(struct device *parent, struct mt6370_led *led,
+ struct led_init_data *init_data)
+{
+ struct v4l2_flash_config v4l2_config = {};
+ int ret;
+
+ ret = devm_led_classdev_flash_register_ext(parent, &led->flash,
+ init_data);
+ if (ret)
+ return dev_err_probe(parent, ret,
+ "Couldn't register flash %d\n", led->led_no);
+
+ mt6370_init_v4l2_flash_config(led, &v4l2_config);
+ led->v4l2_flash = v4l2_flash_init(parent, init_data->fwnode,
+ &led->flash, &v4l2_flash_ops,
+ &v4l2_config);
+ if (IS_ERR(led->v4l2_flash))
+ return dev_err_probe(parent, PTR_ERR(led->v4l2_flash),
+ "Failed to register %d v4l2 sd\n", led->led_no);
+
+ return devm_add_action_or_reset(parent, mt6370_v4l2_flash_release,
+ led->v4l2_flash);
+}
+
+static u32 mt6370_clamp(u32 val, u32 min, u32 max, u32 step)
+{
+ u32 retval;
+
+ retval = clamp_val(val, min, max);
+ if (step > 1)
+ retval = rounddown(retval - min, step) + min;
+
+ return retval;
+}
+
+static int mt6370_init_flash_properties(struct mt6370_led *led,
+ struct led_init_data *init_data)
+{
+ struct led_classdev_flash *flash = &led->flash;
+ struct led_classdev *lcdev = &flash->led_cdev;
+ struct mt6370_priv *priv = led->priv;
+ struct led_flash_setting *s;
+ u32 sources[MT6370_MAX_LEDS];
+ u32 max_uA, val;
+ int i, ret, num;
+
+ num = fwnode_property_count_u32(init_data->fwnode, "led-sources");
+ if (num < 1 || num > MT6370_MAX_LEDS)
+ return dev_err_probe(priv->dev, -EINVAL,
+ "Not specified or wrong number of led-sources\n");
+
+ ret = fwnode_property_read_u32_array(init_data->fwnode, "led-sources", sources, num);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < num; i++) {
+ if (sources[i] >= MT6370_MAX_LEDS)
+ return -EINVAL;
+ if (priv->leds_active & BIT(sources[i]))
+ return -EINVAL;
+ priv->leds_active |= BIT(sources[i]);
+
+ }
+ led->led_no = (num == MT6370_MAX_LEDS) ? MT6370_LED_JOINT :
+ sources[0];
+
+ max_uA = (num == 2) ? MT6370_ITORCH_DOUBLE_MAX_uA : MT6370_ITORCH_MAX_uA;
+ ret = fwnode_property_read_u32(init_data->fwnode, "led-max-microamp", &val);
+ if (ret) {
+ dev_info(priv->dev,
+ "Not specified led-max-microamp, config to the minimum\n");
+ val = MT6370_ITORCH_MIN_uA;
+ } else {
+ val = mt6370_clamp(val, MT6370_ITORCH_MIN_uA, max_uA,
+ MT6370_ITORCH_STEP_uA);
+ }
+
+ lcdev->max_brightness = (val - MT6370_ITORCH_MIN_uA) /
+ MT6370_ITORCH_STEP_uA + 1;
+ lcdev->brightness_set_blocking = mt6370_torch_brightness_set;
+ lcdev->flags |= LED_DEV_CAP_FLASH;
+
+ max_uA = (num == 2) ? MT6370_ISTRB_DOUBLE_MAX_uA : MT6370_ISTRB_MAX_uA;
+ ret = fwnode_property_read_u32(init_data->fwnode, "flash-max-microamp", &val);
+ if (ret) {
+ dev_info(priv->dev,
+ "Not specified flash-max-microamp, config to the minimum\n");
+ val = MT6370_ISTRB_MIN_uA;
+ } else {
+ val = mt6370_clamp(val, MT6370_ISTRB_MIN_uA, max_uA,
+ MT6370_ISTRB_STEP_uA);
+ }
+
+ s = &flash->brightness;
+ s->min = MT6370_ISTRB_MIN_uA;
+ s->step = MT6370_ISTRB_STEP_uA;
+ s->val = s->max = val;
+
+ /*
+ * Always configure to the minimum level when
+ * off to prevent flash current spikes.
+ */
+ ret = _mt6370_flash_brightness_set(flash, s->min);
+ if (ret)
+ return ret;
+
+ ret = fwnode_property_read_u32(init_data->fwnode,
+ "flash-max-timeout-us", &val);
+ if (ret) {
+ dev_info(priv->dev,
+ "Not specified flash-max-timeout-us, config to the minimum\n");
+ val = MT6370_STRBTO_MIN_US;
+ } else {
+ val = mt6370_clamp(val, MT6370_STRBTO_MIN_US,
+ MT6370_STRBTO_MAX_US, MT6370_STRBTO_STEP_US);
+ }
+
+ s = &flash->timeout;
+ s->min = MT6370_STRBTO_MIN_US;
+ s->step = MT6370_STRBTO_STEP_US;
+ s->val = s->max = val;
+
+ flash->ops = &mt6370_flash_ops;
+
+ return 0;
+}
+
+static int mt6370_led_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mt6370_priv *priv;
+ struct fwnode_handle *child;
+ size_t count;
+ int i = 0, ret;
+
+ count = device_get_child_node_count(dev);
+ if (!count || count > MT6370_MAX_LEDS)
+ return dev_err_probe(dev, -EINVAL,
+ "No child node or node count over max led number %zu\n", count);
+
+ priv = devm_kzalloc(dev, struct_size(priv, leds, count), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->leds_count = count;
+ priv->dev = dev;
+ mutex_init(&priv->lock);
+
+ priv->regmap = dev_get_regmap(dev->parent, NULL);
+ if (!priv->regmap)
+ return dev_err_probe(dev, -ENODEV, "Failed to get parent regmap\n");
+
+ device_for_each_child_node(dev, child) {
+ struct mt6370_led *led = priv->leds + i;
+ struct led_init_data init_data = { .fwnode = child, };
+
+ led->priv = priv;
+ led->default_state = led_init_default_state_get(init_data.fwnode);
+
+ ret = mt6370_init_flash_properties(led, &init_data);
+ if (ret)
+ return ret;
+
+ ret = mt6370_led_register(dev, led, &init_data);
+ if (ret)
+ return ret;
+
+ i++;
+ }
+
+ return 0;
+}
+
+static const struct of_device_id mt6370_led_of_id[] = {
+ { .compatible = "mediatek,mt6370-flashlight" },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, mt6370_led_of_id);
+
+static struct platform_driver mt6370_led_driver = {
+ .driver = {
+ .name = "mt6370-flashlight",
+ .of_match_table = mt6370_led_of_id,
+ },
+ .probe = mt6370_led_probe,
+};
+module_platform_driver(mt6370_led_driver);
+
+MODULE_AUTHOR("Alice Chen <[email protected]>");
+MODULE_DESCRIPTION("MT6370 FLASH LED Driver");
+MODULE_LICENSE("GPL v2");
--
2.7.4

2022-09-06 09:24:54

by ChiaEn Wu

[permalink] [raw]

Subject: [PATCH v10 6/8] power: supply: mt6370: Add MediaTek MT6370 charger driver

From: ChiaEn Wu <[email protected]>

MediaTek MT6370 is a SubPMIC consisting of a single cell battery charger
with ADC monitoring, RGB LEDs, dual channel flashlight, WLED backlight
driver, display bias voltage supply, one general purpose LDO, and the
USB Type-C & PD controller complies with the latest USB Type-C and PD
standards.

Add support for the MediaTek MT6370 Charger driver. The charger module
of MT6370 supports High-Accuracy Voltage/Current Regulation,
Average Input Current Regulation, Battery Temperature Sensing,
Over-Temperature Protection, DPDM Detection for BC1.2.

Reviewed-by: Andy Shevchenko <[email protected]>
Signed-off-by: ChiaEn Wu <[email protected]>
---

v10
- Add a feature (disable input current limit) in 'mt6370_chg_init_setting()'
- Add the header file <linux/devm-helpers.h> for using
'devm_work_autocancel()' and 'devm_delayed_work_autocancel()
- Rename 'pwr_rdy' to 'opposite_pwr_rdy' in 'mt6370_chg_pwr_rdy_check()'
- Rename enum elements
('MT6370_ATTACH_STAT_ATTACH_BC12_NOT_DONE' -->
'MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12')
- Revise the assignment value of 'val.intval' in
'mt6370_chg_pwr_rdy_check()' to make the code easy to read.
- Revise the initialization of bc12_work (INIT_WORK() -->
using devm_work_autocancel()) and mivr_dwork
(INIT_DELAYED_WORK + devm_add_action_or_reset() -->
devm_delayed_work_autocancel())
---
drivers/power/supply/Kconfig | 14 +
drivers/power/supply/Makefile | 1 +
drivers/power/supply/mt6370-charger.c | 961 ++++++++++++++++++++++++++++++++++
3 files changed, 976 insertions(+)
create mode 100644 drivers/power/supply/mt6370-charger.c

diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 1aa8323..591deb8 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -619,6 +619,20 @@ config CHARGER_MT6360
Average Input Current Regulation, Battery Temperature Sensing,
Over-Temperature Protection, DPDM Detection for BC1.2.

+config CHARGER_MT6370
+ tristate "MediaTek MT6370 Charger Driver"
+ depends on MFD_MT6370
+ depends on REGULATOR
+ select LINEAR_RANGES
+ help
+ Say Y here to enable MT6370 Charger Part.
+ The device supports High-Accuracy Voltage/Current Regulation,
+ Average Input Current Regulation, Battery Temperature Sensing,
+ Over-Temperature Protection, DPDM Detection for BC1.2.
+
+ This driver can also be built as a module. If so, the module
+ will be called "mt6370-charger".
+
config CHARGER_QCOM_SMBB
tristate "Qualcomm Switch-Mode Battery Charger and Boost"
depends on MFD_SPMI_PMIC || COMPILE_TEST
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index 7f02f36..8c95276 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -82,6 +82,7 @@ obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o
obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o
obj-$(CONFIG_CHARGER_MP2629) += mp2629_charger.o
obj-$(CONFIG_CHARGER_MT6360) += mt6360_charger.o
+obj-$(CONFIG_CHARGER_MT6370) += mt6370-charger.o
obj-$(CONFIG_CHARGER_QCOM_SMBB) += qcom_smbb.o
obj-$(CONFIG_CHARGER_BQ2415X) += bq2415x_charger.o
obj-$(CONFIG_CHARGER_BQ24190) += bq24190_charger.o
diff --git a/drivers/power/supply/mt6370-charger.c b/drivers/power/supply/mt6370-charger.c
new file mode 100644
index 0000000..716cba2
--- /dev/null
+++ b/drivers/power/supply/mt6370-charger.c
@@ -0,0 +1,961 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Author: ChiaEn Wu <[email protected]>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/devm-helpers.h>
+#include <linux/gpio/consumer.h>
+#include <linux/iio/consumer.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/linear_range.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/workqueue.h>
+
+#define MT6370_REG_CHG_CTRL1 0x111
+#define MT6370_REG_CHG_CTRL2 0x112
+#define MT6370_REG_CHG_CTRL3 0x113
+#define MT6370_REG_CHG_CTRL4 0x114
+#define MT6370_REG_CHG_CTRL5 0x115
+#define MT6370_REG_CHG_CTRL6 0x116
+#define MT6370_REG_CHG_CTRL7 0x117
+#define MT6370_REG_CHG_CTRL8 0x118
+#define MT6370_REG_CHG_CTRL9 0x119
+#define MT6370_REG_CHG_CTRL10 0x11A
+#define MT6370_REG_DEVICE_TYPE 0x122
+#define MT6370_REG_USB_STATUS1 0x127
+#define MT6370_REG_CHG_STAT 0x14A
+#define MT6370_REG_FLED_EN 0x17E
+#define MT6370_REG_CHG_STAT1 0X1D0
+#define MT6370_REG_OVPCTRL_STAT 0x1D8
+
+#define MT6370_VOBST_MASK GENMASK(7, 2)
+#define MT6370_OTG_PIN_EN_MASK BIT(1)
+#define MT6370_OPA_MODE_MASK BIT(0)
+#define MT6370_OTG_OC_MASK GENMASK(2, 0)
+
+#define MT6370_MIVR_IBUS_TH_100_mA 100000
+#define MT6370_ADC_CHAN_IBUS 5
+#define MT6370_ADC_CHAN_MAX 9
+
+enum mt6370_chg_reg_field {
+ /* MT6370_REG_CHG_CTRL2 */
+ F_IINLMTSEL, F_CFO_EN, F_CHG_EN,
+ /* MT6370_REG_CHG_CTRL3 */
+ F_IAICR, F_AICR_EN, F_ILIM_EN,
+ /* MT6370_REG_CHG_CTRL4 */
+ F_VOREG,
+ /* MT6370_REG_CHG_CTRL6 */
+ F_VMIVR,
+ /* MT6370_REG_CHG_CTRL7 */
+ F_ICHG,
+ /* MT6370_REG_CHG_CTRL8 */
+ F_IPREC,
+ /* MT6370_REG_CHG_CTRL9 */
+ F_IEOC,
+ /* MT6370_REG_DEVICE_TYPE */
+ F_USBCHGEN,
+ /* MT6370_REG_USB_STATUS1 */
+ F_USB_STAT, F_CHGDET,
+ /* MT6370_REG_CHG_STAT */
+ F_CHG_STAT, F_BOOST_STAT, F_VBAT_LVL,
+ /* MT6370_REG_FLED_EN */
+ F_FL_STROBE,
+ /* MT6370_REG_CHG_STAT1 */
+ F_CHG_MIVR_STAT,
+ /* MT6370_REG_OVPCTRL_STAT */
+ F_UVP_D_STAT,
+ F_MAX
+};
+
+enum mt6370_irq {
+ MT6370_IRQ_ATTACH_I = 0,
+ MT6370_IRQ_UVP_D_EVT,
+ MT6370_IRQ_MIVR,
+ MT6370_IRQ_MAX
+};
+
+struct mt6370_priv {
+ struct device *dev;
+ struct iio_channel *iio_adcs;
+ struct mutex attach_lock;
+ struct power_supply *psy;
+ struct regmap *regmap;
+ struct regmap_field *rmap_fields[F_MAX];
+ struct regulator_dev *rdev;
+ struct workqueue_struct *wq;
+ struct work_struct bc12_work;
+ struct delayed_work mivr_dwork;
+ unsigned int irq_nums[MT6370_IRQ_MAX];
+ int attach;
+ int psy_usb_type;
+ bool pwr_rdy;
+};
+
+enum mt6370_usb_status {
+ MT6370_USB_STAT_NO_VBUS = 0,
+ MT6370_USB_STAT_VBUS_FLOW_IS_UNDER_GOING,
+ MT6370_USB_STAT_SDP,
+ MT6370_USB_STAT_SDP_NSTD,
+ MT6370_USB_STAT_DCP,
+ MT6370_USB_STAT_CDP,
+ MT6370_USB_STAT_MAX
+};
+
+struct mt6370_chg_field {
+ const char *name;
+ const struct linear_range *range;
+ struct reg_field field;
+};
+
+enum {
+ MT6370_RANGE_F_IAICR = 0,
+ MT6370_RANGE_F_VOREG,
+ MT6370_RANGE_F_VMIVR,
+ MT6370_RANGE_F_ICHG,
+ MT6370_RANGE_F_IPREC,
+ MT6370_RANGE_F_IEOC,
+ MT6370_RANGE_F_MAX
+};
+
+static const struct linear_range mt6370_chg_ranges[MT6370_RANGE_F_MAX] = {
+ LINEAR_RANGE_IDX(MT6370_RANGE_F_IAICR, 100000, 0x0, 0x3F, 50000),
+ LINEAR_RANGE_IDX(MT6370_RANGE_F_VOREG, 3900000, 0x0, 0x51, 10000),
+ LINEAR_RANGE_IDX(MT6370_RANGE_F_VMIVR, 3900000, 0x0, 0x5F, 100000),
+ LINEAR_RANGE_IDX(MT6370_RANGE_F_ICHG, 900000, 0x08, 0x31, 100000),
+ LINEAR_RANGE_IDX(MT6370_RANGE_F_IPREC, 100000, 0x0, 0x0F, 50000),
+ LINEAR_RANGE_IDX(MT6370_RANGE_F_IEOC, 100000, 0x0, 0x0F, 50000),
+};
+
+#define MT6370_CHG_FIELD(_fd, _reg, _lsb, _msb) \
+[_fd] = { \
+ .name = #_fd, \
+ .range = NULL, \
+ .field = REG_FIELD(_reg, _lsb, _msb), \
+}
+
+#define MT6370_CHG_FIELD_RANGE(_fd, _reg, _lsb, _msb) \
+[_fd] = { \
+ .name = #_fd, \
+ .range = &mt6370_chg_ranges[MT6370_RANGE_##_fd], \
+ .field = REG_FIELD(_reg, _lsb, _msb), \
+}
+
+static const struct mt6370_chg_field mt6370_chg_fields[F_MAX] = {
+ MT6370_CHG_FIELD(F_IINLMTSEL, MT6370_REG_CHG_CTRL2, 2, 3),
+ MT6370_CHG_FIELD(F_CFO_EN, MT6370_REG_CHG_CTRL2, 1, 1),
+ MT6370_CHG_FIELD(F_CHG_EN, MT6370_REG_CHG_CTRL2, 0, 0),
+ MT6370_CHG_FIELD_RANGE(F_IAICR, MT6370_REG_CHG_CTRL3, 2, 7),
+ MT6370_CHG_FIELD(F_AICR_EN, MT6370_REG_CHG_CTRL3, 1, 1),
+ MT6370_CHG_FIELD(F_ILIM_EN, MT6370_REG_CHG_CTRL3, 0, 0),
+ MT6370_CHG_FIELD_RANGE(F_VOREG, MT6370_REG_CHG_CTRL4, 1, 7),
+ MT6370_CHG_FIELD_RANGE(F_VMIVR, MT6370_REG_CHG_CTRL6, 1, 7),
+ MT6370_CHG_FIELD_RANGE(F_ICHG, MT6370_REG_CHG_CTRL7, 2, 7),
+ MT6370_CHG_FIELD_RANGE(F_IPREC, MT6370_REG_CHG_CTRL8, 0, 3),
+ MT6370_CHG_FIELD_RANGE(F_IEOC, MT6370_REG_CHG_CTRL9, 4, 7),
+ MT6370_CHG_FIELD(F_USBCHGEN, MT6370_REG_DEVICE_TYPE, 7, 7),
+ MT6370_CHG_FIELD(F_USB_STAT, MT6370_REG_USB_STATUS1, 4, 6),
+ MT6370_CHG_FIELD(F_CHGDET, MT6370_REG_USB_STATUS1, 3, 3),
+ MT6370_CHG_FIELD(F_CHG_STAT, MT6370_REG_CHG_STAT, 6, 7),
+ MT6370_CHG_FIELD(F_BOOST_STAT, MT6370_REG_CHG_STAT, 3, 3),
+ MT6370_CHG_FIELD(F_VBAT_LVL, MT6370_REG_CHG_STAT, 5, 5),
+ MT6370_CHG_FIELD(F_FL_STROBE, MT6370_REG_FLED_EN, 2, 2),
+ MT6370_CHG_FIELD(F_CHG_MIVR_STAT, MT6370_REG_CHG_STAT1, 6, 6),
+ MT6370_CHG_FIELD(F_UVP_D_STAT, MT6370_REG_OVPCTRL_STAT, 4, 4),
+};
+
+static inline int mt6370_chg_field_get(struct mt6370_priv *priv,
+ enum mt6370_chg_reg_field fd,
+ unsigned int *val)
+{
+ int ret;
+ unsigned int reg_val;
+
+ ret = regmap_field_read(priv->rmap_fields[fd], &reg_val);
+ if (ret)
+ return ret;
+
+ if (mt6370_chg_fields[fd].range)
+ return linear_range_get_value(mt6370_chg_fields[fd].range,
+ reg_val, val);
+
+ *val = reg_val;
+ return 0;
+}
+
+static inline int mt6370_chg_field_set(struct mt6370_priv *priv,
+ enum mt6370_chg_reg_field fd,
+ unsigned int val)
+{
+ int ret;
+ bool f;
+ const struct linear_range *r;
+
+ if (mt6370_chg_fields[fd].range) {
+ r = mt6370_chg_fields[fd].range;
+
+ if (fd == F_VMIVR) {
+ ret = linear_range_get_selector_high(r, val, &val, &f);
+ if (ret)
+ val = r->max_sel;
+ } else {
+ linear_range_get_selector_within(r, val, &val);
+ }
+ }
+
+ return regmap_field_write(priv->rmap_fields[fd], val);
+}
+
+enum {
+ MT6370_CHG_STAT_READY = 0,
+ MT6370_CHG_STAT_CHARGE_IN_PROGRESS,
+ MT6370_CHG_STAT_DONE,
+ MT6370_CHG_STAT_FAULT,
+ MT6370_CHG_STAT_MAX
+};
+
+enum {
+ MT6370_ATTACH_STAT_DETACH = 0,
+ MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12,
+ MT6370_ATTACH_STAT_ATTACH_BC12_DONE,
+ MT6370_ATTACH_STAT_ATTACH_MAX
+};
+
+static int mt6370_chg_otg_of_parse_cb(struct device_node *of,
+ const struct regulator_desc *rdesc,
+ struct regulator_config *rcfg)
+{
+ struct mt6370_priv *priv = rcfg->driver_data;
+
+ rcfg->ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(of),
+ "enable", 0, GPIOD_OUT_LOW |
+ GPIOD_FLAGS_BIT_NONEXCLUSIVE,
+ rdesc->name);
+ if (IS_ERR(rcfg->ena_gpiod)) {
+ rcfg->ena_gpiod = NULL;
+ return 0;
+ }
+
+ return regmap_update_bits(priv->regmap, MT6370_REG_CHG_CTRL1,
+ MT6370_OTG_PIN_EN_MASK,
+ MT6370_OTG_PIN_EN_MASK);
+}
+
+static void mt6370_chg_bc12_work_func(struct work_struct *work)
+{
+ struct mt6370_priv *priv = container_of(work, struct mt6370_priv,
+ bc12_work);
+ int ret;
+ bool rpt_psy = false;
+ unsigned int attach, usb_stat;
+
+ mutex_lock(&priv->attach_lock);
+ attach = priv->attach;
+
+ switch (attach) {
+ case MT6370_ATTACH_STAT_DETACH:
+ usb_stat = 0;
+ break;
+ case MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12:
+ ret = mt6370_chg_field_set(priv, F_USBCHGEN, attach);
+ if (ret)
+ dev_err(priv->dev, "Failed to enable USB CHG EN\n");
+ goto bc12_work_func_out;
+ case MT6370_ATTACH_STAT_ATTACH_BC12_DONE:
+ ret = mt6370_chg_field_get(priv, F_USB_STAT, &usb_stat);
+ if (ret) {
+ dev_err(priv->dev, "Failed to get USB status\n");
+ goto bc12_work_func_out;
+ }
+ break;
+ default:
+ dev_err(priv->dev, "Invalid attach state\n");
+ goto bc12_work_func_out;
+ }
+
+ rpt_psy = true;
+
+ switch (usb_stat) {
+ case MT6370_USB_STAT_SDP:
+ case MT6370_USB_STAT_SDP_NSTD:
+ priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
+ break;
+ case MT6370_USB_STAT_DCP:
+ priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
+ break;
+ case MT6370_USB_STAT_CDP:
+ priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
+ break;
+ case MT6370_USB_STAT_NO_VBUS:
+ case MT6370_USB_STAT_VBUS_FLOW_IS_UNDER_GOING:
+ default:
+ priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
+ break;
+ }
+
+bc12_work_func_out:
+ mutex_unlock(&priv->attach_lock);
+
+ if (rpt_psy)
+ power_supply_changed(priv->psy);
+}
+
+static int mt6370_chg_toggle_cfo(struct mt6370_priv *priv)
+{
+ int ret;
+ unsigned int fl_strobe;
+
+ /* check if flash led in strobe mode */
+ ret = mt6370_chg_field_get(priv, F_FL_STROBE, &fl_strobe);
+ if (ret) {
+ dev_err(priv->dev, "Failed to get FL_STROBE_EN\n");
+ return ret;
+ }
+
+ if (fl_strobe) {
+ dev_err(priv->dev, "Flash led is still in strobe mode\n");
+ return ret;
+ }
+
+ /* cfo off */
+ ret = mt6370_chg_field_set(priv, F_CFO_EN, 0);
+ if (ret) {
+ dev_err(priv->dev, "Failed to disable CFO_EN\n");
+ return ret;
+ }
+
+ /* cfo on */
+ ret = mt6370_chg_field_set(priv, F_CFO_EN, 1);
+ if (ret)
+ dev_err(priv->dev, "Failed to enable CFO_EN\n");
+
+ return ret;
+}
+
+static int mt6370_chg_read_adc_chan(struct mt6370_priv *priv, unsigned int chan,
+ int *val)
+{
+ int ret;
+
+ if (chan >= MT6370_ADC_CHAN_MAX)
+ return -EINVAL;
+
+ ret = iio_read_channel_processed(&priv->iio_adcs[chan], val);
+ if (ret)
+ dev_err(priv->dev, "Failed to read ADC\n");
+
+ return ret;
+}
+
+static void mt6370_chg_mivr_dwork_func(struct work_struct *work)
+{
+ struct mt6370_priv *priv = container_of(work, struct mt6370_priv,
+ mivr_dwork.work);
+ int ret;
+ unsigned int mivr_stat, ibus;
+
+ ret = mt6370_chg_field_get(priv, F_CHG_MIVR_STAT, &mivr_stat);
+ if (ret) {
+ dev_err(priv->dev, "Failed to get mivr state\n");
+ goto mivr_handler_out;
+ }
+
+ if (!mivr_stat)
+ goto mivr_handler_out;
+
+ ret = mt6370_chg_read_adc_chan(priv, MT6370_ADC_CHAN_IBUS, &ibus);
+ if (ret) {
+ dev_err(priv->dev, "Failed to get ibus\n");
+ goto mivr_handler_out;
+ }
+
+ if (ibus < MT6370_MIVR_IBUS_TH_100_mA) {
+ ret = mt6370_chg_toggle_cfo(priv);
+ if (ret)
+ dev_err(priv->dev, "Failed to toggle cfo\n");
+ }
+
+mivr_handler_out:
+ enable_irq(priv->irq_nums[MT6370_IRQ_MIVR]);
+ pm_relax(priv->dev);
+}
+
+static void mt6370_chg_pwr_rdy_check(struct mt6370_priv *priv)
+{
+ int ret;
+ unsigned int opposite_pwr_rdy, otg_en;
+ union power_supply_propval val;
+
+ /* Check in OTG mode or not */
+ ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
+ if (ret) {
+ dev_err(priv->dev, "Failed to get OTG state\n");
+ return;
+ }
+
+ if (otg_en)
+ return;
+
+ ret = mt6370_chg_field_get(priv, F_UVP_D_STAT, &opposite_pwr_rdy);
+ if (ret) {
+ dev_err(priv->dev, "Failed to get opposite power ready state\n");
+ return;
+ }
+
+ val.intval = opposite_pwr_rdy ?
+ MT6370_ATTACH_STAT_DETACH :
+ MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12;
+
+ ret = power_supply_set_property(priv->psy, POWER_SUPPLY_PROP_ONLINE,
+ &val);
+ if (ret)
+ dev_err(priv->dev, "Failed to start attach/detach flow\n");
+}
+
+static int mt6370_chg_get_online(struct mt6370_priv *priv,
+ union power_supply_propval *val)
+{
+ mutex_lock(&priv->attach_lock);
+ val->intval = !!priv->attach;
+ mutex_unlock(&priv->attach_lock);
+
+ return 0;
+}
+
+static int mt6370_chg_get_status(struct mt6370_priv *priv,
+ union power_supply_propval *val)
+{
+ int ret;
+ unsigned int chg_stat;
+ union power_supply_propval online;
+
+ ret = power_supply_get_property(priv->psy, POWER_SUPPLY_PROP_ONLINE,
+ &online);
+ if (ret) {
+ dev_err(priv->dev, "Failed to get online status\n");
+ return ret;
+ }
+
+ if (!online.intval) {
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ return 0;
+ }
+
+ ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
+ if (ret)
+ return ret;
+
+ switch (chg_stat) {
+ case MT6370_CHG_STAT_READY:
+ case MT6370_CHG_STAT_FAULT:
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ return ret;
+ case MT6370_CHG_STAT_CHARGE_IN_PROGRESS:
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ return ret;
+ case MT6370_CHG_STAT_DONE:
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ return ret;
+ default:
+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+ return ret;
+ }
+}
+
+static int mt6370_chg_get_charge_type(struct mt6370_priv *priv,
+ union power_supply_propval *val)
+{
+ int type, ret;
+ unsigned int chg_stat, vbat_lvl;
+
+ ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
+ if (ret)
+ return ret;
+
+ ret = mt6370_chg_field_get(priv, F_VBAT_LVL, &vbat_lvl);
+ if (ret)
+ return ret;
+
+ switch (chg_stat) {
+ case MT6370_CHG_STAT_CHARGE_IN_PROGRESS:
+ if (vbat_lvl)
+ type = POWER_SUPPLY_CHARGE_TYPE_FAST;
+ else
+ type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+ break;
+ case MT6370_CHG_STAT_READY:
+ case MT6370_CHG_STAT_DONE:
+ case MT6370_CHG_STAT_FAULT:
+ default:
+ type = POWER_SUPPLY_CHARGE_TYPE_NONE;
+ break;
+ }
+
+ val->intval = type;
+
+ return 0;
+}
+
+static int mt6370_chg_set_online(struct mt6370_priv *priv,
+ const union power_supply_propval *val)
+{
+ bool pwr_rdy = !!val->intval;
+
+ mutex_lock(&priv->attach_lock);
+ if (pwr_rdy == !!priv->attach) {
+ dev_err(priv->dev, "pwr_rdy is same(%d)\n", pwr_rdy);
+ mutex_unlock(&priv->attach_lock);
+ return 0;
+ }
+
+ priv->attach = pwr_rdy;
+ mutex_unlock(&priv->attach_lock);
+
+ if (!queue_work(priv->wq, &priv->bc12_work))
+ dev_err(priv->dev, "bc12 work has already queued\n");
+
+ return 0;
+}
+
+static int mt6370_chg_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct mt6370_priv *priv = power_supply_get_drvdata(psy);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ return mt6370_chg_get_online(priv, val);
+ case POWER_SUPPLY_PROP_STATUS:
+ return mt6370_chg_get_status(priv, val);
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ return mt6370_chg_get_charge_type(priv, val);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ return mt6370_chg_field_get(priv, F_ICHG, &val->intval);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ val->intval = linear_range_get_max_value(&mt6370_chg_ranges[MT6370_RANGE_F_ICHG]);
+ return 0;
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ return mt6370_chg_field_get(priv, F_VOREG, &val->intval);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ val->intval = linear_range_get_max_value(&mt6370_chg_ranges[MT6370_RANGE_F_VOREG]);
+ return 0;
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+ return mt6370_chg_field_get(priv, F_IAICR, &val->intval);
+ case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+ return mt6370_chg_field_get(priv, F_VMIVR, &val->intval);
+ case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+ return mt6370_chg_field_get(priv, F_IPREC, &val->intval);
+ case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+ return mt6370_chg_field_get(priv, F_IEOC, &val->intval);
+ case POWER_SUPPLY_PROP_USB_TYPE:
+ val->intval = priv->psy_usb_type;
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mt6370_chg_set_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ const union power_supply_propval *val)
+{
+ struct mt6370_priv *priv = power_supply_get_drvdata(psy);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ return mt6370_chg_set_online(priv, val);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ return mt6370_chg_field_set(priv, F_ICHG, val->intval);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ return mt6370_chg_field_set(priv, F_VOREG, val->intval);
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+ return mt6370_chg_field_set(priv, F_IAICR, val->intval);
+ case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+ return mt6370_chg_field_set(priv, F_VMIVR, val->intval);
+ case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+ return mt6370_chg_field_set(priv, F_IPREC, val->intval);
+ case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+ return mt6370_chg_field_set(priv, F_IEOC, val->intval);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mt6370_chg_property_is_writeable(struct power_supply *psy,
+ enum power_supply_property psp)
+{
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+ case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+ case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+ case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+static enum power_supply_property mt6370_chg_properties[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
+ POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
+ POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
+ POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
+ POWER_SUPPLY_PROP_USB_TYPE,
+};
+
+static enum power_supply_usb_type mt6370_chg_usb_types[] = {
+ POWER_SUPPLY_USB_TYPE_UNKNOWN,
+ POWER_SUPPLY_USB_TYPE_SDP,
+ POWER_SUPPLY_USB_TYPE_CDP,
+ POWER_SUPPLY_USB_TYPE_DCP,
+};
+
+static const struct power_supply_desc mt6370_chg_psy_desc = {
+ .name = "mt6370-charger",
+ .type = POWER_SUPPLY_TYPE_USB,
+ .properties = mt6370_chg_properties,
+ .num_properties = ARRAY_SIZE(mt6370_chg_properties),
+ .get_property = mt6370_chg_get_property,
+ .set_property = mt6370_chg_set_property,
+ .property_is_writeable = mt6370_chg_property_is_writeable,
+ .usb_types = mt6370_chg_usb_types,
+ .num_usb_types = ARRAY_SIZE(mt6370_chg_usb_types),
+};
+
+static const struct regulator_ops mt6370_chg_otg_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_current_limit = regulator_set_current_limit_regmap,
+ .get_current_limit = regulator_get_current_limit_regmap,
+};
+
+static const u32 mt6370_chg_otg_oc_ma[] = {
+ 500000, 700000, 1100000, 1300000, 1800000, 2100000, 2400000,
+};
+
+static const struct regulator_desc mt6370_chg_otg_rdesc = {
+ .of_match = "usb-otg-vbus-regulator",
+ .of_parse_cb = mt6370_chg_otg_of_parse_cb,
+ .name = "mt6370-usb-otg-vbus",
+ .ops = &mt6370_chg_otg_ops,
+ .owner = THIS_MODULE,
+ .type = REGULATOR_VOLTAGE,
+ .min_uV = 4425000,
+ .uV_step = 25000,
+ .n_voltages = 57,
+ .vsel_reg = MT6370_REG_CHG_CTRL5,
+ .vsel_mask = MT6370_VOBST_MASK,
+ .enable_reg = MT6370_REG_CHG_CTRL1,
+ .enable_mask = MT6370_OPA_MODE_MASK,
+ .curr_table = mt6370_chg_otg_oc_ma,
+ .n_current_limits = ARRAY_SIZE(mt6370_chg_otg_oc_ma),
+ .csel_reg = MT6370_REG_CHG_CTRL10,
+ .csel_mask = MT6370_OTG_OC_MASK,
+};
+
+static int mt6370_chg_init_rmap_fields(struct mt6370_priv *priv)
+{
+ int i;
+ const struct mt6370_chg_field *fds = mt6370_chg_fields;
+
+ for (i = 0; i < F_MAX; i++) {
+ priv->rmap_fields[i] = devm_regmap_field_alloc(priv->dev,
+ priv->regmap,
+ fds[i].field);
+ if (IS_ERR(priv->rmap_fields[i]))
+ return dev_err_probe(priv->dev,
+ PTR_ERR(priv->rmap_fields[i]),
+ "Failed to allocate regmapfield[%s]\n",
+ fds[i].name);
+ }
+
+ return 0;
+}
+
+static int mt6370_chg_init_setting(struct mt6370_priv *priv)
+{
+ int ret;
+
+ /* Disable usb_chg_en */
+ ret = mt6370_chg_field_set(priv, F_USBCHGEN, 0);
+ if (ret) {
+ dev_err(priv->dev, "Failed to disable usb_chg_en\n");
+ return ret;
+ }
+
+ /* Disable input current limit */
+ ret = mt6370_chg_field_set(priv, F_ILIM_EN, 0);
+ if (ret) {
+ dev_err(priv->dev, "Failed to disable input current limit\n");
+ return ret;
+ }
+
+ /* ICHG/IEOC Workaround, ICHG can not be set less than 900mA */
+ ret = mt6370_chg_field_set(priv, F_ICHG, 900000);
+ if (ret) {
+ dev_err(priv->dev, "Failed to set ICHG to 900mA");
+ return ret;
+ }
+
+ /* Change input current limit selection to using IAICR results */
+ ret = mt6370_chg_field_set(priv, F_IINLMTSEL, 2);
+ if (ret) {
+ dev_err(priv->dev, "Failed to set IINLMTSEL\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+#define MT6370_CHG_DT_PROP_DECL(_name, _type, _field) \
+{ \
+ .name = "mediatek,chg-" #_name, \
+ .type = MT6370_PARSE_TYPE_##_type, \
+ .fd = _field, \
+}
+
+static int mt6370_chg_init_otg_regulator(struct mt6370_priv *priv)
+{
+ struct regulator_config rcfg = {
+ .dev = priv->dev,
+ .regmap = priv->regmap,
+ .driver_data = priv,
+ };
+
+ priv->rdev = devm_regulator_register(priv->dev, &mt6370_chg_otg_rdesc,
+ &rcfg);
+
+ return PTR_ERR_OR_ZERO(priv->rdev);
+}
+
+static int mt6370_chg_init_psy(struct mt6370_priv *priv)
+{
+ struct power_supply_config cfg = {
+ .drv_data = priv,
+ .of_node = dev_of_node(priv->dev),
+ };
+
+ priv->psy = devm_power_supply_register(priv->dev, &mt6370_chg_psy_desc,
+ &cfg);
+
+ return PTR_ERR_OR_ZERO(priv->psy);
+}
+
+static void mt6370_chg_destroy_attach_lock(void *data)
+{
+ struct mutex *attach_lock = data;
+
+ mutex_destroy(attach_lock);
+}
+
+static void mt6370_chg_destroy_wq(void *data)
+{
+ struct workqueue_struct *wq = data;
+
+ flush_workqueue(wq);
+ destroy_workqueue(wq);
+}
+
+static irqreturn_t mt6370_attach_i_handler(int irq, void *data)
+{
+ struct mt6370_priv *priv = data;
+ unsigned int otg_en;
+ int ret;
+
+ /* Check in OTG mode or not */
+ ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
+ if (ret) {
+ dev_err(priv->dev, "Failed to get OTG state\n");
+ return IRQ_NONE;
+ }
+
+ if (otg_en)
+ return IRQ_HANDLED;
+
+ mutex_lock(&priv->attach_lock);
+ priv->attach = MT6370_ATTACH_STAT_ATTACH_BC12_DONE;
+ mutex_unlock(&priv->attach_lock);
+
+ if (!queue_work(priv->wq, &priv->bc12_work))
+ dev_err(priv->dev, "bc12 work has already queued\n");
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t mt6370_uvp_d_evt_handler(int irq, void *data)
+{
+ struct mt6370_priv *priv = data;
+
+ mt6370_chg_pwr_rdy_check(priv);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t mt6370_mivr_handler(int irq, void *data)
+{
+ struct mt6370_priv *priv = data;
+
+ pm_stay_awake(priv->dev);
+ disable_irq_nosync(priv->irq_nums[MT6370_IRQ_MIVR]);
+ schedule_delayed_work(&priv->mivr_dwork, msecs_to_jiffies(200));
+
+ return IRQ_HANDLED;
+}
+
+#define MT6370_CHG_IRQ(_name) \
+{ \
+ .name = #_name, \
+ .handler = mt6370_##_name##_handler, \
+}
+
+static int mt6370_chg_init_irq(struct mt6370_priv *priv)
+{
+ int i, ret;
+ const struct {
+ char *name;
+ irq_handler_t handler;
+ } mt6370_chg_irqs[] = {
+ MT6370_CHG_IRQ(attach_i),
+ MT6370_CHG_IRQ(uvp_d_evt),
+ MT6370_CHG_IRQ(mivr),
+ };
+
+ for (i = 0; i < ARRAY_SIZE(mt6370_chg_irqs); i++) {
+ ret = platform_get_irq_byname(to_platform_device(priv->dev),
+ mt6370_chg_irqs[i].name);
+ if (ret < 0)
+ return dev_err_probe(priv->dev, ret,
+ "Failed to get irq %s\n",
+ mt6370_chg_irqs[i].name);
+
+ priv->irq_nums[i] = ret;
+ ret = devm_request_threaded_irq(priv->dev, ret, NULL,
+ mt6370_chg_irqs[i].handler,
+ IRQF_TRIGGER_FALLING,
+ dev_name(priv->dev), priv);
+ if (ret)
+ return dev_err_probe(priv->dev, ret,
+ "Failed to request irq %s\n",
+ mt6370_chg_irqs[i].name);
+ }
+
+ return 0;
+}
+
+static int mt6370_chg_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mt6370_priv *priv;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->dev = &pdev->dev;
+
+ priv->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!priv->regmap)
+ return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");
+
+ ret = mt6370_chg_init_rmap_fields(priv);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to init regmap fields\n");
+
+ platform_set_drvdata(pdev, priv);
+
+ priv->iio_adcs = devm_iio_channel_get_all(priv->dev);
+ if (IS_ERR(priv->iio_adcs))
+ return dev_err_probe(dev, PTR_ERR(priv->iio_adcs),
+ "Failed to get iio adc\n");
+
+ ret = mt6370_chg_init_otg_regulator(priv);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to init OTG regulator\n");
+
+ ret = mt6370_chg_init_psy(priv);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to init psy\n");
+
+ mutex_init(&priv->attach_lock);
+ ret = devm_add_action_or_reset(dev, mt6370_chg_destroy_attach_lock,
+ &priv->attach_lock);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to init attach lock\n");
+
+ priv->attach = MT6370_ATTACH_STAT_DETACH;
+
+ priv->wq = create_singlethread_workqueue(dev_name(priv->dev));
+ if (IS_ERR(priv->wq))
+ return dev_err_probe(dev, PTR_ERR(priv->wq),
+ "Failed to create workqueue\n");
+
+ ret = devm_add_action_or_reset(dev, mt6370_chg_destroy_wq, priv->wq);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to init wq\n");
+
+ ret = devm_work_autocancel(dev, &priv->bc12_work, mt6370_chg_bc12_work_func);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to init bc12 work\n");
+
+ ret = devm_delayed_work_autocancel(dev, &priv->mivr_dwork, mt6370_chg_mivr_dwork_func);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to init mivr delayed work\n");
+
+ ret = mt6370_chg_init_setting(priv);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "Failed to init mt6370 charger setting\n");
+
+ ret = mt6370_chg_init_irq(priv);
+ if (ret)
+ return ret;
+
+ mt6370_chg_pwr_rdy_check(priv);
+
+ return 0;
+}
+
+static const struct of_device_id mt6370_chg_of_match[] = {
+ { .compatible = "mediatek,mt6370-charger", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, mt6370_chg_of_match);
+
+static struct platform_driver mt6370_chg_driver = {
+ .probe = mt6370_chg_probe,
+ .driver = {
+ .name = "mt6370-charger",
+ .of_match_table = mt6370_chg_of_match,
+ },
+};
+module_platform_driver(mt6370_chg_driver);
+
+MODULE_AUTHOR("ChiaEn Wu <[email protected]>");
+MODULE_DESCRIPTION("MediaTek MT6370 Charger Driver");
+MODULE_LICENSE("GPL v2");
--
2.7.4

2022-09-12 10:30:31

by Sebastian Reichel

[permalink] [raw]

Subject: Re: [PATCH v10 6/8] power: supply: mt6370: Add MediaTek MT6370 charger driver

Hi,

On Tue, Sep 06, 2022 at 04:34:02PM +0800, ChiaEn Wu wrote:
> From: ChiaEn Wu <[email protected]>
>
> MediaTek MT6370 is a SubPMIC consisting of a single cell battery charger
> with ADC monitoring, RGB LEDs, dual channel flashlight, WLED backlight
> driver, display bias voltage supply, one general purpose LDO, and the
> USB Type-C & PD controller complies with the latest USB Type-C and PD
> standards.
>
> Add support for the MediaTek MT6370 Charger driver. The charger module
> of MT6370 supports High-Accuracy Voltage/Current Regulation,
> Average Input Current Regulation, Battery Temperature Sensing,
> Over-Temperature Protection, DPDM Detection for BC1.2.
>
> Reviewed-by: Andy Shevchenko <[email protected]>
> Signed-off-by: ChiaEn Wu <[email protected]>
> ---

Acked-by: Sebastian Reichel <[email protected]>

-- Sebastian

>
> v10
> - Add a feature (disable input current limit) in 'mt6370_chg_init_setting()'
> - Add the header file <linux/devm-helpers.h> for using
> 'devm_work_autocancel()' and 'devm_delayed_work_autocancel()
> - Rename 'pwr_rdy' to 'opposite_pwr_rdy' in 'mt6370_chg_pwr_rdy_check()'
> - Rename enum elements
> ('MT6370_ATTACH_STAT_ATTACH_BC12_NOT_DONE' -->
> 'MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12')
> - Revise the assignment value of 'val.intval' in
> 'mt6370_chg_pwr_rdy_check()' to make the code easy to read.
> - Revise the initialization of bc12_work (INIT_WORK() -->
> using devm_work_autocancel()) and mivr_dwork
> (INIT_DELAYED_WORK + devm_add_action_or_reset() -->
> devm_delayed_work_autocancel())
> ---
> drivers/power/supply/Kconfig | 14 +
> drivers/power/supply/Makefile | 1 +
> drivers/power/supply/mt6370-charger.c | 961 ++++++++++++++++++++++++++++++++++
> 3 files changed, 976 insertions(+)
> create mode 100644 drivers/power/supply/mt6370-charger.c
>
> diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
> index 1aa8323..591deb8 100644
> --- a/drivers/power/supply/Kconfig
> +++ b/drivers/power/supply/Kconfig
> @@ -619,6 +619,20 @@ config CHARGER_MT6360
> Average Input Current Regulation, Battery Temperature Sensing,
> Over-Temperature Protection, DPDM Detection for BC1.2.
>
> +config CHARGER_MT6370
> + tristate "MediaTek MT6370 Charger Driver"
> + depends on MFD_MT6370
> + depends on REGULATOR
> + select LINEAR_RANGES
> + help
> + Say Y here to enable MT6370 Charger Part.
> + The device supports High-Accuracy Voltage/Current Regulation,
> + Average Input Current Regulation, Battery Temperature Sensing,
> + Over-Temperature Protection, DPDM Detection for BC1.2.
> +
> + This driver can also be built as a module. If so, the module
> + will be called "mt6370-charger".
> +
> config CHARGER_QCOM_SMBB
> tristate "Qualcomm Switch-Mode Battery Charger and Boost"
> depends on MFD_SPMI_PMIC || COMPILE_TEST
> diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
> index 7f02f36..8c95276 100644
> --- a/drivers/power/supply/Makefile
> +++ b/drivers/power/supply/Makefile
> @@ -82,6 +82,7 @@ obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o
> obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o
> obj-$(CONFIG_CHARGER_MP2629) += mp2629_charger.o
> obj-$(CONFIG_CHARGER_MT6360) += mt6360_charger.o
> +obj-$(CONFIG_CHARGER_MT6370) += mt6370-charger.o
> obj-$(CONFIG_CHARGER_QCOM_SMBB) += qcom_smbb.o
> obj-$(CONFIG_CHARGER_BQ2415X) += bq2415x_charger.o
> obj-$(CONFIG_CHARGER_BQ24190) += bq24190_charger.o
> diff --git a/drivers/power/supply/mt6370-charger.c b/drivers/power/supply/mt6370-charger.c
> new file mode 100644
> index 0000000..716cba2
> --- /dev/null
> +++ b/drivers/power/supply/mt6370-charger.c
> @@ -0,0 +1,961 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2022 Richtek Technology Corp.
> + *
> + * Author: ChiaEn Wu <[email protected]>
> + */
> +
> +#include <linux/bitfield.h>
> +#include <linux/bits.h>
> +#include <linux/devm-helpers.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/iio/consumer.h>
> +#include <linux/init.h>
> +#include <linux/interrupt.h>
> +#include <linux/kernel.h>
> +#include <linux/linear_range.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/platform_device.h>
> +#include <linux/power_supply.h>
> +#include <linux/regmap.h>
> +#include <linux/regulator/driver.h>
> +#include <linux/workqueue.h>
> +
> +#define MT6370_REG_CHG_CTRL1 0x111
> +#define MT6370_REG_CHG_CTRL2 0x112
> +#define MT6370_REG_CHG_CTRL3 0x113
> +#define MT6370_REG_CHG_CTRL4 0x114
> +#define MT6370_REG_CHG_CTRL5 0x115
> +#define MT6370_REG_CHG_CTRL6 0x116
> +#define MT6370_REG_CHG_CTRL7 0x117
> +#define MT6370_REG_CHG_CTRL8 0x118
> +#define MT6370_REG_CHG_CTRL9 0x119
> +#define MT6370_REG_CHG_CTRL10 0x11A
> +#define MT6370_REG_DEVICE_TYPE 0x122
> +#define MT6370_REG_USB_STATUS1 0x127
> +#define MT6370_REG_CHG_STAT 0x14A
> +#define MT6370_REG_FLED_EN 0x17E
> +#define MT6370_REG_CHG_STAT1 0X1D0
> +#define MT6370_REG_OVPCTRL_STAT 0x1D8
> +
> +#define MT6370_VOBST_MASK GENMASK(7, 2)
> +#define MT6370_OTG_PIN_EN_MASK BIT(1)
> +#define MT6370_OPA_MODE_MASK BIT(0)
> +#define MT6370_OTG_OC_MASK GENMASK(2, 0)
> +
> +#define MT6370_MIVR_IBUS_TH_100_mA 100000
> +#define MT6370_ADC_CHAN_IBUS 5
> +#define MT6370_ADC_CHAN_MAX 9
> +
> +enum mt6370_chg_reg_field {
> + /* MT6370_REG_CHG_CTRL2 */
> + F_IINLMTSEL, F_CFO_EN, F_CHG_EN,
> + /* MT6370_REG_CHG_CTRL3 */
> + F_IAICR, F_AICR_EN, F_ILIM_EN,
> + /* MT6370_REG_CHG_CTRL4 */
> + F_VOREG,
> + /* MT6370_REG_CHG_CTRL6 */
> + F_VMIVR,
> + /* MT6370_REG_CHG_CTRL7 */
> + F_ICHG,
> + /* MT6370_REG_CHG_CTRL8 */
> + F_IPREC,
> + /* MT6370_REG_CHG_CTRL9 */
> + F_IEOC,
> + /* MT6370_REG_DEVICE_TYPE */
> + F_USBCHGEN,
> + /* MT6370_REG_USB_STATUS1 */
> + F_USB_STAT, F_CHGDET,
> + /* MT6370_REG_CHG_STAT */
> + F_CHG_STAT, F_BOOST_STAT, F_VBAT_LVL,
> + /* MT6370_REG_FLED_EN */
> + F_FL_STROBE,
> + /* MT6370_REG_CHG_STAT1 */
> + F_CHG_MIVR_STAT,
> + /* MT6370_REG_OVPCTRL_STAT */
> + F_UVP_D_STAT,
> + F_MAX
> +};
> +
> +enum mt6370_irq {
> + MT6370_IRQ_ATTACH_I = 0,
> + MT6370_IRQ_UVP_D_EVT,
> + MT6370_IRQ_MIVR,
> + MT6370_IRQ_MAX
> +};
> +
> +struct mt6370_priv {
> + struct device *dev;
> + struct iio_channel *iio_adcs;
> + struct mutex attach_lock;
> + struct power_supply *psy;
> + struct regmap *regmap;
> + struct regmap_field *rmap_fields[F_MAX];
> + struct regulator_dev *rdev;
> + struct workqueue_struct *wq;
> + struct work_struct bc12_work;
> + struct delayed_work mivr_dwork;
> + unsigned int irq_nums[MT6370_IRQ_MAX];
> + int attach;
> + int psy_usb_type;
> + bool pwr_rdy;
> +};
> +
> +enum mt6370_usb_status {
> + MT6370_USB_STAT_NO_VBUS = 0,
> + MT6370_USB_STAT_VBUS_FLOW_IS_UNDER_GOING,
> + MT6370_USB_STAT_SDP,
> + MT6370_USB_STAT_SDP_NSTD,
> + MT6370_USB_STAT_DCP,
> + MT6370_USB_STAT_CDP,
> + MT6370_USB_STAT_MAX
> +};
> +
> +struct mt6370_chg_field {
> + const char *name;
> + const struct linear_range *range;
> + struct reg_field field;
> +};
> +
> +enum {
> + MT6370_RANGE_F_IAICR = 0,
> + MT6370_RANGE_F_VOREG,
> + MT6370_RANGE_F_VMIVR,
> + MT6370_RANGE_F_ICHG,
> + MT6370_RANGE_F_IPREC,
> + MT6370_RANGE_F_IEOC,
> + MT6370_RANGE_F_MAX
> +};
> +
> +static const struct linear_range mt6370_chg_ranges[MT6370_RANGE_F_MAX] = {
> + LINEAR_RANGE_IDX(MT6370_RANGE_F_IAICR, 100000, 0x0, 0x3F, 50000),
> + LINEAR_RANGE_IDX(MT6370_RANGE_F_VOREG, 3900000, 0x0, 0x51, 10000),
> + LINEAR_RANGE_IDX(MT6370_RANGE_F_VMIVR, 3900000, 0x0, 0x5F, 100000),
> + LINEAR_RANGE_IDX(MT6370_RANGE_F_ICHG, 900000, 0x08, 0x31, 100000),
> + LINEAR_RANGE_IDX(MT6370_RANGE_F_IPREC, 100000, 0x0, 0x0F, 50000),
> + LINEAR_RANGE_IDX(MT6370_RANGE_F_IEOC, 100000, 0x0, 0x0F, 50000),
> +};
> +
> +#define MT6370_CHG_FIELD(_fd, _reg, _lsb, _msb) \
> +[_fd] = { \
> + .name = #_fd, \
> + .range = NULL, \
> + .field = REG_FIELD(_reg, _lsb, _msb), \
> +}
> +
> +#define MT6370_CHG_FIELD_RANGE(_fd, _reg, _lsb, _msb) \
> +[_fd] = { \
> + .name = #_fd, \
> + .range = &mt6370_chg_ranges[MT6370_RANGE_##_fd], \
> + .field = REG_FIELD(_reg, _lsb, _msb), \
> +}
> +
> +static const struct mt6370_chg_field mt6370_chg_fields[F_MAX] = {
> + MT6370_CHG_FIELD(F_IINLMTSEL, MT6370_REG_CHG_CTRL2, 2, 3),
> + MT6370_CHG_FIELD(F_CFO_EN, MT6370_REG_CHG_CTRL2, 1, 1),
> + MT6370_CHG_FIELD(F_CHG_EN, MT6370_REG_CHG_CTRL2, 0, 0),
> + MT6370_CHG_FIELD_RANGE(F_IAICR, MT6370_REG_CHG_CTRL3, 2, 7),
> + MT6370_CHG_FIELD(F_AICR_EN, MT6370_REG_CHG_CTRL3, 1, 1),
> + MT6370_CHG_FIELD(F_ILIM_EN, MT6370_REG_CHG_CTRL3, 0, 0),
> + MT6370_CHG_FIELD_RANGE(F_VOREG, MT6370_REG_CHG_CTRL4, 1, 7),
> + MT6370_CHG_FIELD_RANGE(F_VMIVR, MT6370_REG_CHG_CTRL6, 1, 7),
> + MT6370_CHG_FIELD_RANGE(F_ICHG, MT6370_REG_CHG_CTRL7, 2, 7),
> + MT6370_CHG_FIELD_RANGE(F_IPREC, MT6370_REG_CHG_CTRL8, 0, 3),
> + MT6370_CHG_FIELD_RANGE(F_IEOC, MT6370_REG_CHG_CTRL9, 4, 7),
> + MT6370_CHG_FIELD(F_USBCHGEN, MT6370_REG_DEVICE_TYPE, 7, 7),
> + MT6370_CHG_FIELD(F_USB_STAT, MT6370_REG_USB_STATUS1, 4, 6),
> + MT6370_CHG_FIELD(F_CHGDET, MT6370_REG_USB_STATUS1, 3, 3),
> + MT6370_CHG_FIELD(F_CHG_STAT, MT6370_REG_CHG_STAT, 6, 7),
> + MT6370_CHG_FIELD(F_BOOST_STAT, MT6370_REG_CHG_STAT, 3, 3),
> + MT6370_CHG_FIELD(F_VBAT_LVL, MT6370_REG_CHG_STAT, 5, 5),
> + MT6370_CHG_FIELD(F_FL_STROBE, MT6370_REG_FLED_EN, 2, 2),
> + MT6370_CHG_FIELD(F_CHG_MIVR_STAT, MT6370_REG_CHG_STAT1, 6, 6),
> + MT6370_CHG_FIELD(F_UVP_D_STAT, MT6370_REG_OVPCTRL_STAT, 4, 4),
> +};
> +
> +static inline int mt6370_chg_field_get(struct mt6370_priv *priv,
> + enum mt6370_chg_reg_field fd,
> + unsigned int *val)
> +{
> + int ret;
> + unsigned int reg_val;
> +
> + ret = regmap_field_read(priv->rmap_fields[fd], &reg_val);
> + if (ret)
> + return ret;
> +
> + if (mt6370_chg_fields[fd].range)
> + return linear_range_get_value(mt6370_chg_fields[fd].range,
> + reg_val, val);
> +
> + *val = reg_val;
> + return 0;
> +}
> +
> +static inline int mt6370_chg_field_set(struct mt6370_priv *priv,
> + enum mt6370_chg_reg_field fd,
> + unsigned int val)
> +{
> + int ret;
> + bool f;
> + const struct linear_range *r;
> +
> + if (mt6370_chg_fields[fd].range) {
> + r = mt6370_chg_fields[fd].range;
> +
> + if (fd == F_VMIVR) {
> + ret = linear_range_get_selector_high(r, val, &val, &f);
> + if (ret)
> + val = r->max_sel;
> + } else {
> + linear_range_get_selector_within(r, val, &val);
> + }
> + }
> +
> + return regmap_field_write(priv->rmap_fields[fd], val);
> +}
> +
> +enum {
> + MT6370_CHG_STAT_READY = 0,
> + MT6370_CHG_STAT_CHARGE_IN_PROGRESS,
> + MT6370_CHG_STAT_DONE,
> + MT6370_CHG_STAT_FAULT,
> + MT6370_CHG_STAT_MAX
> +};
> +
> +enum {
> + MT6370_ATTACH_STAT_DETACH = 0,
> + MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12,
> + MT6370_ATTACH_STAT_ATTACH_BC12_DONE,
> + MT6370_ATTACH_STAT_ATTACH_MAX
> +};
> +
> +static int mt6370_chg_otg_of_parse_cb(struct device_node *of,
> + const struct regulator_desc *rdesc,
> + struct regulator_config *rcfg)
> +{
> + struct mt6370_priv *priv = rcfg->driver_data;
> +
> + rcfg->ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(of),
> + "enable", 0, GPIOD_OUT_LOW |
> + GPIOD_FLAGS_BIT_NONEXCLUSIVE,
> + rdesc->name);
> + if (IS_ERR(rcfg->ena_gpiod)) {
> + rcfg->ena_gpiod = NULL;
> + return 0;
> + }
> +
> + return regmap_update_bits(priv->regmap, MT6370_REG_CHG_CTRL1,
> + MT6370_OTG_PIN_EN_MASK,
> + MT6370_OTG_PIN_EN_MASK);
> +}
> +
> +static void mt6370_chg_bc12_work_func(struct work_struct *work)
> +{
> + struct mt6370_priv *priv = container_of(work, struct mt6370_priv,
> + bc12_work);
> + int ret;
> + bool rpt_psy = false;
> + unsigned int attach, usb_stat;
> +
> + mutex_lock(&priv->attach_lock);
> + attach = priv->attach;
> +
> + switch (attach) {
> + case MT6370_ATTACH_STAT_DETACH:
> + usb_stat = 0;
> + break;
> + case MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12:
> + ret = mt6370_chg_field_set(priv, F_USBCHGEN, attach);
> + if (ret)
> + dev_err(priv->dev, "Failed to enable USB CHG EN\n");
> + goto bc12_work_func_out;
> + case MT6370_ATTACH_STAT_ATTACH_BC12_DONE:
> + ret = mt6370_chg_field_get(priv, F_USB_STAT, &usb_stat);
> + if (ret) {
> + dev_err(priv->dev, "Failed to get USB status\n");
> + goto bc12_work_func_out;
> + }
> + break;
> + default:
> + dev_err(priv->dev, "Invalid attach state\n");
> + goto bc12_work_func_out;
> + }
> +
> + rpt_psy = true;
> +
> + switch (usb_stat) {
> + case MT6370_USB_STAT_SDP:
> + case MT6370_USB_STAT_SDP_NSTD:
> + priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
> + break;
> + case MT6370_USB_STAT_DCP:
> + priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
> + break;
> + case MT6370_USB_STAT_CDP:
> + priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
> + break;
> + case MT6370_USB_STAT_NO_VBUS:
> + case MT6370_USB_STAT_VBUS_FLOW_IS_UNDER_GOING:
> + default:
> + priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
> + break;
> + }
> +
> +bc12_work_func_out:
> + mutex_unlock(&priv->attach_lock);
> +
> + if (rpt_psy)
> + power_supply_changed(priv->psy);
> +}
> +
> +static int mt6370_chg_toggle_cfo(struct mt6370_priv *priv)
> +{
> + int ret;
> + unsigned int fl_strobe;
> +
> + /* check if flash led in strobe mode */
> + ret = mt6370_chg_field_get(priv, F_FL_STROBE, &fl_strobe);
> + if (ret) {
> + dev_err(priv->dev, "Failed to get FL_STROBE_EN\n");
> + return ret;
> + }
> +
> + if (fl_strobe) {
> + dev_err(priv->dev, "Flash led is still in strobe mode\n");
> + return ret;
> + }
> +
> + /* cfo off */
> + ret = mt6370_chg_field_set(priv, F_CFO_EN, 0);
> + if (ret) {
> + dev_err(priv->dev, "Failed to disable CFO_EN\n");
> + return ret;
> + }
> +
> + /* cfo on */
> + ret = mt6370_chg_field_set(priv, F_CFO_EN, 1);
> + if (ret)
> + dev_err(priv->dev, "Failed to enable CFO_EN\n");
> +
> + return ret;
> +}
> +
> +static int mt6370_chg_read_adc_chan(struct mt6370_priv *priv, unsigned int chan,
> + int *val)
> +{
> + int ret;
> +
> + if (chan >= MT6370_ADC_CHAN_MAX)
> + return -EINVAL;
> +
> + ret = iio_read_channel_processed(&priv->iio_adcs[chan], val);
> + if (ret)
> + dev_err(priv->dev, "Failed to read ADC\n");
> +
> + return ret;
> +}
> +
> +static void mt6370_chg_mivr_dwork_func(struct work_struct *work)
> +{
> + struct mt6370_priv *priv = container_of(work, struct mt6370_priv,
> + mivr_dwork.work);
> + int ret;
> + unsigned int mivr_stat, ibus;
> +
> + ret = mt6370_chg_field_get(priv, F_CHG_MIVR_STAT, &mivr_stat);
> + if (ret) {
> + dev_err(priv->dev, "Failed to get mivr state\n");
> + goto mivr_handler_out;
> + }
> +
> + if (!mivr_stat)
> + goto mivr_handler_out;
> +
> + ret = mt6370_chg_read_adc_chan(priv, MT6370_ADC_CHAN_IBUS, &ibus);
> + if (ret) {
> + dev_err(priv->dev, "Failed to get ibus\n");
> + goto mivr_handler_out;
> + }
> +
> + if (ibus < MT6370_MIVR_IBUS_TH_100_mA) {
> + ret = mt6370_chg_toggle_cfo(priv);
> + if (ret)
> + dev_err(priv->dev, "Failed to toggle cfo\n");
> + }
> +
> +mivr_handler_out:
> + enable_irq(priv->irq_nums[MT6370_IRQ_MIVR]);
> + pm_relax(priv->dev);
> +}
> +
> +static void mt6370_chg_pwr_rdy_check(struct mt6370_priv *priv)
> +{
> + int ret;
> + unsigned int opposite_pwr_rdy, otg_en;
> + union power_supply_propval val;
> +
> + /* Check in OTG mode or not */
> + ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
> + if (ret) {
> + dev_err(priv->dev, "Failed to get OTG state\n");
> + return;
> + }
> +
> + if (otg_en)
> + return;
> +
> + ret = mt6370_chg_field_get(priv, F_UVP_D_STAT, &opposite_pwr_rdy);
> + if (ret) {
> + dev_err(priv->dev, "Failed to get opposite power ready state\n");
> + return;
> + }
> +
> + val.intval = opposite_pwr_rdy ?
> + MT6370_ATTACH_STAT_DETACH :
> + MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12;
> +
> + ret = power_supply_set_property(priv->psy, POWER_SUPPLY_PROP_ONLINE,
> + &val);
> + if (ret)
> + dev_err(priv->dev, "Failed to start attach/detach flow\n");
> +}
> +
> +static int mt6370_chg_get_online(struct mt6370_priv *priv,
> + union power_supply_propval *val)
> +{
> + mutex_lock(&priv->attach_lock);
> + val->intval = !!priv->attach;
> + mutex_unlock(&priv->attach_lock);
> +
> + return 0;
> +}
> +
> +static int mt6370_chg_get_status(struct mt6370_priv *priv,
> + union power_supply_propval *val)
> +{
> + int ret;
> + unsigned int chg_stat;
> + union power_supply_propval online;
> +
> + ret = power_supply_get_property(priv->psy, POWER_SUPPLY_PROP_ONLINE,
> + &online);
> + if (ret) {
> + dev_err(priv->dev, "Failed to get online status\n");
> + return ret;
> + }
> +
> + if (!online.intval) {
> + val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
> + return 0;
> + }
> +
> + ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
> + if (ret)
> + return ret;
> +
> + switch (chg_stat) {
> + case MT6370_CHG_STAT_READY:
> + case MT6370_CHG_STAT_FAULT:
> + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
> + return ret;
> + case MT6370_CHG_STAT_CHARGE_IN_PROGRESS:
> + val->intval = POWER_SUPPLY_STATUS_CHARGING;
> + return ret;
> + case MT6370_CHG_STAT_DONE:
> + val->intval = POWER_SUPPLY_STATUS_FULL;
> + return ret;
> + default:
> + val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
> + return ret;
> + }
> +}
> +
> +static int mt6370_chg_get_charge_type(struct mt6370_priv *priv,
> + union power_supply_propval *val)
> +{
> + int type, ret;
> + unsigned int chg_stat, vbat_lvl;
> +
> + ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
> + if (ret)
> + return ret;
> +
> + ret = mt6370_chg_field_get(priv, F_VBAT_LVL, &vbat_lvl);
> + if (ret)
> + return ret;
> +
> + switch (chg_stat) {
> + case MT6370_CHG_STAT_CHARGE_IN_PROGRESS:
> + if (vbat_lvl)
> + type = POWER_SUPPLY_CHARGE_TYPE_FAST;
> + else
> + type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
> + break;
> + case MT6370_CHG_STAT_READY:
> + case MT6370_CHG_STAT_DONE:
> + case MT6370_CHG_STAT_FAULT:
> + default:
> + type = POWER_SUPPLY_CHARGE_TYPE_NONE;
> + break;
> + }
> +
> + val->intval = type;
> +
> + return 0;
> +}
> +
> +static int mt6370_chg_set_online(struct mt6370_priv *priv,
> + const union power_supply_propval *val)
> +{
> + bool pwr_rdy = !!val->intval;
> +
> + mutex_lock(&priv->attach_lock);
> + if (pwr_rdy == !!priv->attach) {
> + dev_err(priv->dev, "pwr_rdy is same(%d)\n", pwr_rdy);
> + mutex_unlock(&priv->attach_lock);
> + return 0;
> + }
> +
> + priv->attach = pwr_rdy;
> + mutex_unlock(&priv->attach_lock);
> +
> + if (!queue_work(priv->wq, &priv->bc12_work))
> + dev_err(priv->dev, "bc12 work has already queued\n");
> +
> + return 0;
> +}
> +
> +static int mt6370_chg_get_property(struct power_supply *psy,
> + enum power_supply_property psp,
> + union power_supply_propval *val)
> +{
> + struct mt6370_priv *priv = power_supply_get_drvdata(psy);
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_ONLINE:
> + return mt6370_chg_get_online(priv, val);
> + case POWER_SUPPLY_PROP_STATUS:
> + return mt6370_chg_get_status(priv, val);
> + case POWER_SUPPLY_PROP_CHARGE_TYPE:
> + return mt6370_chg_get_charge_type(priv, val);
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
> + return mt6370_chg_field_get(priv, F_ICHG, &val->intval);
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
> + val->intval = linear_range_get_max_value(&mt6370_chg_ranges[MT6370_RANGE_F_ICHG]);
> + return 0;
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
> + return mt6370_chg_field_get(priv, F_VOREG, &val->intval);
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
> + val->intval = linear_range_get_max_value(&mt6370_chg_ranges[MT6370_RANGE_F_VOREG]);
> + return 0;
> + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
> + return mt6370_chg_field_get(priv, F_IAICR, &val->intval);
> + case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
> + return mt6370_chg_field_get(priv, F_VMIVR, &val->intval);
> + case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
> + return mt6370_chg_field_get(priv, F_IPREC, &val->intval);
> + case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
> + return mt6370_chg_field_get(priv, F_IEOC, &val->intval);
> + case POWER_SUPPLY_PROP_USB_TYPE:
> + val->intval = priv->psy_usb_type;
> + return 0;
> + default:
> + return -EINVAL;
> + }
> +}
> +
> +static int mt6370_chg_set_property(struct power_supply *psy,
> + enum power_supply_property psp,
> + const union power_supply_propval *val)
> +{
> + struct mt6370_priv *priv = power_supply_get_drvdata(psy);
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_ONLINE:
> + return mt6370_chg_set_online(priv, val);
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
> + return mt6370_chg_field_set(priv, F_ICHG, val->intval);
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
> + return mt6370_chg_field_set(priv, F_VOREG, val->intval);
> + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
> + return mt6370_chg_field_set(priv, F_IAICR, val->intval);
> + case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
> + return mt6370_chg_field_set(priv, F_VMIVR, val->intval);
> + case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
> + return mt6370_chg_field_set(priv, F_IPREC, val->intval);
> + case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
> + return mt6370_chg_field_set(priv, F_IEOC, val->intval);
> + default:
> + return -EINVAL;
> + }
> +}
> +
> +static int mt6370_chg_property_is_writeable(struct power_supply *psy,
> + enum power_supply_property psp)
> +{
> + switch (psp) {
> + case POWER_SUPPLY_PROP_ONLINE:
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
> + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
> + case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
> + case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
> + case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
> + return 1;
> + default:
> + return 0;
> + }
> +}
> +
> +static enum power_supply_property mt6370_chg_properties[] = {
> + POWER_SUPPLY_PROP_ONLINE,
> + POWER_SUPPLY_PROP_STATUS,
> + POWER_SUPPLY_PROP_CHARGE_TYPE,
> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
> + POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
> + POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
> + POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
> + POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
> + POWER_SUPPLY_PROP_USB_TYPE,
> +};
> +
> +static enum power_supply_usb_type mt6370_chg_usb_types[] = {
> + POWER_SUPPLY_USB_TYPE_UNKNOWN,
> + POWER_SUPPLY_USB_TYPE_SDP,
> + POWER_SUPPLY_USB_TYPE_CDP,
> + POWER_SUPPLY_USB_TYPE_DCP,
> +};
> +
> +static const struct power_supply_desc mt6370_chg_psy_desc = {
> + .name = "mt6370-charger",
> + .type = POWER_SUPPLY_TYPE_USB,
> + .properties = mt6370_chg_properties,
> + .num_properties = ARRAY_SIZE(mt6370_chg_properties),
> + .get_property = mt6370_chg_get_property,
> + .set_property = mt6370_chg_set_property,
> + .property_is_writeable = mt6370_chg_property_is_writeable,
> + .usb_types = mt6370_chg_usb_types,
> + .num_usb_types = ARRAY_SIZE(mt6370_chg_usb_types),
> +};
> +
> +static const struct regulator_ops mt6370_chg_otg_ops = {
> + .list_voltage = regulator_list_voltage_linear,
> + .enable = regulator_enable_regmap,
> + .disable = regulator_disable_regmap,
> + .is_enabled = regulator_is_enabled_regmap,
> + .set_voltage_sel = regulator_set_voltage_sel_regmap,
> + .get_voltage_sel = regulator_get_voltage_sel_regmap,
> + .set_current_limit = regulator_set_current_limit_regmap,
> + .get_current_limit = regulator_get_current_limit_regmap,
> +};
> +
> +static const u32 mt6370_chg_otg_oc_ma[] = {
> + 500000, 700000, 1100000, 1300000, 1800000, 2100000, 2400000,
> +};
> +
> +static const struct regulator_desc mt6370_chg_otg_rdesc = {
> + .of_match = "usb-otg-vbus-regulator",
> + .of_parse_cb = mt6370_chg_otg_of_parse_cb,
> + .name = "mt6370-usb-otg-vbus",
> + .ops = &mt6370_chg_otg_ops,
> + .owner = THIS_MODULE,
> + .type = REGULATOR_VOLTAGE,
> + .min_uV = 4425000,
> + .uV_step = 25000,
> + .n_voltages = 57,
> + .vsel_reg = MT6370_REG_CHG_CTRL5,
> + .vsel_mask = MT6370_VOBST_MASK,
> + .enable_reg = MT6370_REG_CHG_CTRL1,
> + .enable_mask = MT6370_OPA_MODE_MASK,
> + .curr_table = mt6370_chg_otg_oc_ma,
> + .n_current_limits = ARRAY_SIZE(mt6370_chg_otg_oc_ma),
> + .csel_reg = MT6370_REG_CHG_CTRL10,
> + .csel_mask = MT6370_OTG_OC_MASK,
> +};
> +
> +static int mt6370_chg_init_rmap_fields(struct mt6370_priv *priv)
> +{
> + int i;
> + const struct mt6370_chg_field *fds = mt6370_chg_fields;
> +
> + for (i = 0; i < F_MAX; i++) {
> + priv->rmap_fields[i] = devm_regmap_field_alloc(priv->dev,
> + priv->regmap,
> + fds[i].field);
> + if (IS_ERR(priv->rmap_fields[i]))
> + return dev_err_probe(priv->dev,
> + PTR_ERR(priv->rmap_fields[i]),
> + "Failed to allocate regmapfield[%s]\n",
> + fds[i].name);
> + }
> +
> + return 0;
> +}
> +
> +static int mt6370_chg_init_setting(struct mt6370_priv *priv)
> +{
> + int ret;
> +
> + /* Disable usb_chg_en */
> + ret = mt6370_chg_field_set(priv, F_USBCHGEN, 0);
> + if (ret) {
> + dev_err(priv->dev, "Failed to disable usb_chg_en\n");
> + return ret;
> + }
> +
> + /* Disable input current limit */
> + ret = mt6370_chg_field_set(priv, F_ILIM_EN, 0);
> + if (ret) {
> + dev_err(priv->dev, "Failed to disable input current limit\n");
> + return ret;
> + }
> +
> + /* ICHG/IEOC Workaround, ICHG can not be set less than 900mA */
> + ret = mt6370_chg_field_set(priv, F_ICHG, 900000);
> + if (ret) {
> + dev_err(priv->dev, "Failed to set ICHG to 900mA");
> + return ret;
> + }
> +
> + /* Change input current limit selection to using IAICR results */
> + ret = mt6370_chg_field_set(priv, F_IINLMTSEL, 2);
> + if (ret) {
> + dev_err(priv->dev, "Failed to set IINLMTSEL\n");
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +#define MT6370_CHG_DT_PROP_DECL(_name, _type, _field) \
> +{ \
> + .name = "mediatek,chg-" #_name, \
> + .type = MT6370_PARSE_TYPE_##_type, \
> + .fd = _field, \
> +}
> +
> +static int mt6370_chg_init_otg_regulator(struct mt6370_priv *priv)
> +{
> + struct regulator_config rcfg = {
> + .dev = priv->dev,
> + .regmap = priv->regmap,
> + .driver_data = priv,
> + };
> +
> + priv->rdev = devm_regulator_register(priv->dev, &mt6370_chg_otg_rdesc,
> + &rcfg);
> +
> + return PTR_ERR_OR_ZERO(priv->rdev);
> +}
> +
> +static int mt6370_chg_init_psy(struct mt6370_priv *priv)
> +{
> + struct power_supply_config cfg = {
> + .drv_data = priv,
> + .of_node = dev_of_node(priv->dev),
> + };
> +
> + priv->psy = devm_power_supply_register(priv->dev, &mt6370_chg_psy_desc,
> + &cfg);
> +
> + return PTR_ERR_OR_ZERO(priv->psy);
> +}
> +
> +static void mt6370_chg_destroy_attach_lock(void *data)
> +{
> + struct mutex *attach_lock = data;
> +
> + mutex_destroy(attach_lock);
> +}
> +
> +static void mt6370_chg_destroy_wq(void *data)
> +{
> + struct workqueue_struct *wq = data;
> +
> + flush_workqueue(wq);
> + destroy_workqueue(wq);
> +}
> +
> +static irqreturn_t mt6370_attach_i_handler(int irq, void *data)
> +{
> + struct mt6370_priv *priv = data;
> + unsigned int otg_en;
> + int ret;
> +
> + /* Check in OTG mode or not */
> + ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
> + if (ret) {
> + dev_err(priv->dev, "Failed to get OTG state\n");
> + return IRQ_NONE;
> + }
> +
> + if (otg_en)
> + return IRQ_HANDLED;
> +
> + mutex_lock(&priv->attach_lock);
> + priv->attach = MT6370_ATTACH_STAT_ATTACH_BC12_DONE;
> + mutex_unlock(&priv->attach_lock);
> +
> + if (!queue_work(priv->wq, &priv->bc12_work))
> + dev_err(priv->dev, "bc12 work has already queued\n");
> +
> + return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t mt6370_uvp_d_evt_handler(int irq, void *data)
> +{
> + struct mt6370_priv *priv = data;
> +
> + mt6370_chg_pwr_rdy_check(priv);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t mt6370_mivr_handler(int irq, void *data)
> +{
> + struct mt6370_priv *priv = data;
> +
> + pm_stay_awake(priv->dev);
> + disable_irq_nosync(priv->irq_nums[MT6370_IRQ_MIVR]);
> + schedule_delayed_work(&priv->mivr_dwork, msecs_to_jiffies(200));
> +
> + return IRQ_HANDLED;
> +}
> +
> +#define MT6370_CHG_IRQ(_name) \
> +{ \
> + .name = #_name, \
> + .handler = mt6370_##_name##_handler, \
> +}
> +
> +static int mt6370_chg_init_irq(struct mt6370_priv *priv)
> +{
> + int i, ret;
> + const struct {
> + char *name;
> + irq_handler_t handler;
> + } mt6370_chg_irqs[] = {
> + MT6370_CHG_IRQ(attach_i),
> + MT6370_CHG_IRQ(uvp_d_evt),
> + MT6370_CHG_IRQ(mivr),
> + };
> +
> + for (i = 0; i < ARRAY_SIZE(mt6370_chg_irqs); i++) {
> + ret = platform_get_irq_byname(to_platform_device(priv->dev),
> + mt6370_chg_irqs[i].name);
> + if (ret < 0)
> + return dev_err_probe(priv->dev, ret,
> + "Failed to get irq %s\n",
> + mt6370_chg_irqs[i].name);
> +
> + priv->irq_nums[i] = ret;
> + ret = devm_request_threaded_irq(priv->dev, ret, NULL,
> + mt6370_chg_irqs[i].handler,
> + IRQF_TRIGGER_FALLING,
> + dev_name(priv->dev), priv);
> + if (ret)
> + return dev_err_probe(priv->dev, ret,
> + "Failed to request irq %s\n",
> + mt6370_chg_irqs[i].name);
> + }
> +
> + return 0;
> +}
> +
> +static int mt6370_chg_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct mt6370_priv *priv;
> + int ret;
> +
> + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> + if (!priv)
> + return -ENOMEM;
> +
> + priv->dev = &pdev->dev;
> +
> + priv->regmap = dev_get_regmap(pdev->dev.parent, NULL);
> + if (!priv->regmap)
> + return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");
> +
> + ret = mt6370_chg_init_rmap_fields(priv);
> + if (ret)
> + return dev_err_probe(dev, ret, "Failed to init regmap fields\n");
> +
> + platform_set_drvdata(pdev, priv);
> +
> + priv->iio_adcs = devm_iio_channel_get_all(priv->dev);
> + if (IS_ERR(priv->iio_adcs))
> + return dev_err_probe(dev, PTR_ERR(priv->iio_adcs),
> + "Failed to get iio adc\n");
> +
> + ret = mt6370_chg_init_otg_regulator(priv);
> + if (ret)
> + return dev_err_probe(dev, ret, "Failed to init OTG regulator\n");
> +
> + ret = mt6370_chg_init_psy(priv);
> + if (ret)
> + return dev_err_probe(dev, ret, "Failed to init psy\n");
> +
> + mutex_init(&priv->attach_lock);
> + ret = devm_add_action_or_reset(dev, mt6370_chg_destroy_attach_lock,
> + &priv->attach_lock);
> + if (ret)
> + return dev_err_probe(dev, ret, "Failed to init attach lock\n");
> +
> + priv->attach = MT6370_ATTACH_STAT_DETACH;
> +
> + priv->wq = create_singlethread_workqueue(dev_name(priv->dev));
> + if (IS_ERR(priv->wq))
> + return dev_err_probe(dev, PTR_ERR(priv->wq),
> + "Failed to create workqueue\n");
> +
> + ret = devm_add_action_or_reset(dev, mt6370_chg_destroy_wq, priv->wq);
> + if (ret)
> + return dev_err_probe(dev, ret, "Failed to init wq\n");
> +
> + ret = devm_work_autocancel(dev, &priv->bc12_work, mt6370_chg_bc12_work_func);
> + if (ret)
> + return dev_err_probe(dev, ret, "Failed to init bc12 work\n");
> +
> + ret = devm_delayed_work_autocancel(dev, &priv->mivr_dwork, mt6370_chg_mivr_dwork_func);
> + if (ret)
> + return dev_err_probe(dev, ret, "Failed to init mivr delayed work\n");
> +
> + ret = mt6370_chg_init_setting(priv);
> + if (ret)
> + return dev_err_probe(dev, ret,
> + "Failed to init mt6370 charger setting\n");
> +
> + ret = mt6370_chg_init_irq(priv);
> + if (ret)
> + return ret;
> +
> + mt6370_chg_pwr_rdy_check(priv);
> +
> + return 0;
> +}
> +
> +static const struct of_device_id mt6370_chg_of_match[] = {
> + { .compatible = "mediatek,mt6370-charger", },
> + {}
> +};
> +MODULE_DEVICE_TABLE(of, mt6370_chg_of_match);
> +
> +static struct platform_driver mt6370_chg_driver = {
> + .probe = mt6370_chg_probe,
> + .driver = {
> + .name = "mt6370-charger",
> + .of_match_table = mt6370_chg_of_match,
> + },
> +};
> +module_platform_driver(mt6370_chg_driver);
> +
> +MODULE_AUTHOR("ChiaEn Wu <[email protected]>");
> +MODULE_DESCRIPTION("MediaTek MT6370 Charger Driver");
> +MODULE_LICENSE("GPL v2");
> --
> 2.7.4
>

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