From: ChiaEn Wu <[email protected]>
This patch series add MediaTek MT6370 PMIC support. 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.
In this series of patches, we based on Andy Shevchenko's mfd patch which
is used to adjust the Makefile order.
(https://lore.kernel.org/all/[email protected]/)
Among this, we also took some changes for MT6370 drivers, revised the
MT6370 device tree files to comply with DT specifications, and revised
the wrong SoB chain in entire patches.
PS.
"[PATCH v7 06/13] dt-bindings: mfd: Add MediaTek MT6370" depends on previous
DT binding patches, so before applying this patch, please apply other DT
patches first. Thanks!
PS2.
Our MFD DT-binding depends on LED flash and LED RGB DT-bindings, but the
Kconfigs of LED flash and LED RGB depend on MFD. Due to dependency
consideration, we also submit LED flash and LED RGB with other patches
at this time.
Thank you,
ChiaEn Wu
---
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
- 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 (7):
dt-bindings: usb: Add MediaTek MT6370 TCPC
dt-bindings: leds: mt6370: Add MediaTek MT6370 current sink type LED
indicator
dt-bindings: backlight: Add MediaTek MT6370 backlight
dt-bindings: mfd: Add MediaTek MT6370
mfd: mt6370: Add MediaTek MT6370 support
usb: typec: tcpci_mt6370: Add MediaTek MT6370 tcpci driver
leds: rgb: mt6370: Add MediaTek MT6370 current sink type LED Indicator
support
ChiaEn Wu (4):
dt-bindings: power: supply: Add MediaTek MT6370 Charger
iio: adc: mt6370: Add MediaTek MT6370 support
power: supply: mt6370: Add MediaTek MT6370 charger driver
video: backlight: mt6370: Add MediaTek MT6370 support
.../leds/backlight/mediatek,mt6370-backlight.yaml | 121 +++
.../bindings/leds/mediatek,mt6370-flashlight.yaml | 41 +
.../bindings/leds/mediatek,mt6370-indicator.yaml | 81 ++
.../devicetree/bindings/mfd/mediatek,mt6370.yaml | 280 ++++++
.../power/supply/mediatek,mt6370-charger.yaml | 88 ++
.../bindings/usb/mediatek,mt6370-tcpc.yaml | 36 +
drivers/iio/adc/Kconfig | 12 +
drivers/iio/adc/Makefile | 1 +
drivers/iio/adc/mt6370-adc.c | 305 ++++++
drivers/leds/flash/Kconfig | 12 +
drivers/leds/flash/Makefile | 1 +
drivers/leds/flash/leds-mt6370-flash.c | 632 ++++++++++++
drivers/leds/rgb/Kconfig | 13 +
drivers/leds/rgb/Makefile | 1 +
drivers/leds/rgb/leds-mt6370-rgb.c | 1022 ++++++++++++++++++++
drivers/mfd/Kconfig | 16 +
drivers/mfd/Makefile | 1 +
drivers/mfd/mt6370.c | 312 ++++++
drivers/mfd/mt6370.h | 99 ++
drivers/power/supply/Kconfig | 14 +
drivers/power/supply/Makefile | 1 +
drivers/power/supply/mt6370-charger.c | 965 ++++++++++++++++++
drivers/usb/typec/tcpm/Kconfig | 11 +
drivers/usb/typec/tcpm/Makefile | 1 +
drivers/usb/typec/tcpm/tcpci_mt6370.c | 207 ++++
drivers/video/backlight/Kconfig | 13 +
drivers/video/backlight/Makefile | 1 +
drivers/video/backlight/mt6370-backlight.c | 351 +++++++
include/dt-bindings/iio/adc/mediatek,mt6370_adc.h | 18 +
29 files changed, 4656 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml
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/mfd/mediatek,mt6370.yaml
create mode 100644 Documentation/devicetree/bindings/power/supply/mediatek,mt6370-charger.yaml
create mode 100644 Documentation/devicetree/bindings/usb/mediatek,mt6370-tcpc.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/mfd/mt6370.c
create mode 100644 drivers/mfd/mt6370.h
create mode 100644 drivers/power/supply/mt6370-charger.c
create mode 100644 drivers/usb/typec/tcpm/tcpci_mt6370.c
create mode 100644 drivers/video/backlight/mt6370-backlight.c
create mode 100644 include/dt-bindings/iio/adc/mediatek,mt6370_adc.h
--
2.7.4
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 a support for the MT6370 ADC driver for system monitoring, including
charger current, voltage, and temperature.
Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
Signed-off-by: ChiaEn Wu <[email protected]>
---
v7
- 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
---
drivers/iio/adc/Kconfig | 12 ++
drivers/iio/adc/Makefile | 1 +
drivers/iio/adc/mt6370-adc.c | 305 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 318 insertions(+)
create mode 100644 drivers/iio/adc/mt6370-adc.c
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index 7fe5930..995cbb5 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -736,6 +736,18 @@ config MEDIATEK_MT6360_ADC
is used in smartphones and tablets and supports a 11 channel
general purpose ADC.
+config MEDIATEK_MT6370_ADC
+ tristate "MediaTek MT6370 ADC driver"
+ depends on MFD_MT6370
+ help
+ Say yes here to enable MediaTek MT6370 ADC support.
+
+ This ADC driver provides 9 channels for system monitoring (charger
+ current, voltage, and temperature).
+
+ This driver can also be built as a module. If so, the module
+ will be called "mt6370-adc".
+
config MEDIATEK_MT6577_AUXADC
tristate "MediaTek AUXADC driver"
depends on ARCH_MEDIATEK || COMPILE_TEST
diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
index 1772a54..c6bc35f 100644
--- a/drivers/iio/adc/Makefile
+++ b/drivers/iio/adc/Makefile
@@ -68,6 +68,7 @@ obj-$(CONFIG_MCP320X) += mcp320x.o
obj-$(CONFIG_MCP3422) += mcp3422.o
obj-$(CONFIG_MCP3911) += mcp3911.o
obj-$(CONFIG_MEDIATEK_MT6360_ADC) += mt6360-adc.o
+obj-$(CONFIG_MEDIATEK_MT6370_ADC) += mt6370-adc.o
obj-$(CONFIG_MEDIATEK_MT6577_AUXADC) += mt6577_auxadc.o
obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o
obj-$(CONFIG_MESON_SARADC) += meson_saradc.o
diff --git a/drivers/iio/adc/mt6370-adc.c b/drivers/iio/adc/mt6370-adc.c
new file mode 100644
index 0000000..2a46471
--- /dev/null
+++ b/drivers/iio/adc/mt6370-adc.c
@@ -0,0 +1,305 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Author: ChiaEn Wu <[email protected]>
+ */
+
+#include <linux/bits.h>
+#include <linux/bitfield.h>
+#include <linux/iio/iio.h>
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/sysfs.h>
+#include <linux/units.h>
+
+#include <dt-bindings/iio/adc/mediatek,mt6370_adc.h>
+
+#define MT6370_REG_CHG_CTRL3 0x113
+#define MT6370_REG_CHG_CTRL7 0x117
+#define MT6370_REG_CHG_ADC 0x121
+#define MT6370_REG_ADC_DATA_H 0x14C
+
+#define MT6370_ADC_START_MASK BIT(0)
+#define MT6370_ADC_IN_SEL_MASK GENMASK(7, 4)
+#define MT6370_AICR_ICHG_MASK GENMASK(7, 2)
+
+#define MT6370_AICR_100_mA 0x0
+#define MT6370_AICR_150_mA 0x1
+#define MT6370_AICR_200_mA 0x2
+#define MT6370_AICR_250_mA 0x3
+#define MT6370_AICR_300_mA 0x4
+#define MT6370_AICR_350_mA 0x5
+
+#define MT6370_ICHG_100_mA 0x0
+#define MT6370_ICHG_200_mA 0x1
+#define MT6370_ICHG_300_mA 0x2
+#define MT6370_ICHG_400_mA 0x3
+#define MT6370_ICHG_500_mA 0x4
+#define MT6370_ICHG_600_mA 0x5
+#define MT6370_ICHG_700_mA 0x6
+#define MT6370_ICHG_800_mA 0x7
+
+#define ADC_CONV_TIME_MS 35
+#define ADC_CONV_POLLING_TIME_US 1000
+
+struct mt6370_adc_data {
+ struct device *dev;
+ struct regmap *regmap;
+ /*
+ * This mutex lock is for preventing the different ADC channels
+ * from being read at the same time.
+ */
+ struct mutex adc_lock;
+};
+
+static int mt6370_adc_read_channel(struct mt6370_adc_data *priv, int chan,
+ unsigned long addr, int *val)
+{
+ unsigned int reg_val;
+ __be16 be_val;
+ int ret;
+
+ mutex_lock(&priv->adc_lock);
+
+ reg_val = MT6370_ADC_START_MASK |
+ FIELD_PREP(MT6370_ADC_IN_SEL_MASK, addr);
+ ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, reg_val);
+ if (ret)
+ goto adc_unlock;
+
+ msleep(ADC_CONV_TIME_MS);
+
+ ret = regmap_read_poll_timeout(priv->regmap,
+ MT6370_REG_CHG_ADC, reg_val,
+ !(reg_val & MT6370_ADC_START_MASK),
+ ADC_CONV_POLLING_TIME_US,
+ ADC_CONV_TIME_MS * MILLI * 3);
+ if (ret) {
+ dev_err(priv->dev, "Failed to read ADC register (%d)\n", ret);
+ goto adc_unlock;
+ }
+
+ ret = regmap_raw_read(priv->regmap, MT6370_REG_ADC_DATA_H,
+ &be_val, sizeof(be_val));
+ if (ret)
+ goto adc_unlock;
+
+ *val = be16_to_cpu(be_val);
+ ret = IIO_VAL_INT;
+
+adc_unlock:
+ mutex_unlock(&priv->adc_lock);
+
+ return ret;
+}
+
+static int mt6370_adc_read_scale(struct mt6370_adc_data *priv,
+ int chan, int *val1, int *val2)
+{
+ unsigned int reg_val;
+ int ret;
+
+ switch (chan) {
+ case MT6370_CHAN_VBAT:
+ case MT6370_CHAN_VSYS:
+ case MT6370_CHAN_CHG_VDDP:
+ *val1 = 5;
+ return IIO_VAL_INT;
+ case MT6370_CHAN_IBUS:
+ ret = regmap_read(priv->regmap, MT6370_REG_CHG_CTRL3, ®_val);
+ if (ret)
+ return ret;
+
+ reg_val = FIELD_GET(MT6370_AICR_ICHG_MASK, reg_val);
+ switch (reg_val) {
+ case MT6370_AICR_100_mA:
+ case MT6370_AICR_150_mA:
+ case MT6370_AICR_200_mA:
+ case MT6370_AICR_250_mA:
+ case MT6370_AICR_300_mA:
+ case MT6370_AICR_350_mA:
+ *val1 = 3350;
+ break;
+ default:
+ *val1 = 5000;
+ break;
+ }
+
+ *val2 = 100;
+
+ return IIO_VAL_FRACTIONAL;
+ case MT6370_CHAN_IBAT:
+ ret = regmap_read(priv->regmap, MT6370_REG_CHG_CTRL7, ®_val);
+ if (ret)
+ return ret;
+
+ reg_val = FIELD_GET(MT6370_AICR_ICHG_MASK, reg_val);
+ switch (reg_val) {
+ case MT6370_ICHG_100_mA:
+ case MT6370_ICHG_200_mA:
+ case MT6370_ICHG_300_mA:
+ case MT6370_ICHG_400_mA:
+ *val1 = 2375;
+ break;
+ case MT6370_ICHG_500_mA:
+ case MT6370_ICHG_600_mA:
+ case MT6370_ICHG_700_mA:
+ case MT6370_ICHG_800_mA:
+ *val1 = 2680;
+ break;
+ default:
+ *val1 = 5000;
+ break;
+ }
+
+ *val2 = 100;
+
+ return IIO_VAL_FRACTIONAL;
+ case MT6370_CHAN_VBUSDIV5:
+ *val1 = 25;
+ return IIO_VAL_INT;
+ case MT6370_CHAN_VBUSDIV2:
+ *val1 = 50;
+ return IIO_VAL_INT;
+ case MT6370_CHAN_TS_BAT:
+ *val1 = 25;
+ *val2 = 10000;
+ return IIO_VAL_FRACTIONAL;
+ case MT6370_CHAN_TEMP_JC:
+ *val1 = 2000;
+ return IIO_VAL_FRACTIONAL;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mt6370_adc_read_offset(struct mt6370_adc_data *priv,
+ int chan, int *val)
+{
+ *val = -20;
+
+ return IIO_VAL_INT;
+}
+
+static int mt6370_adc_read_raw(struct iio_dev *iio_dev,
+ const struct iio_chan_spec *chan,
+ int *val, int *val2, long mask)
+{
+ struct mt6370_adc_data *priv = iio_priv(iio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ return mt6370_adc_read_channel(priv, chan->channel,
+ chan->address, val);
+ case IIO_CHAN_INFO_SCALE:
+ return mt6370_adc_read_scale(priv, chan->channel, val, val2);
+ case IIO_CHAN_INFO_OFFSET:
+ return mt6370_adc_read_offset(priv, chan->channel, val);
+ default:
+ return -EINVAL;
+ }
+}
+
+static const char * const mt6370_channel_labels[MT6370_CHAN_MAX] = {
+ [MT6370_CHAN_VBUSDIV5] = "vbusdiv5",
+ [MT6370_CHAN_VBUSDIV2] = "vbusdiv2",
+ [MT6370_CHAN_VSYS] = "vsys",
+ [MT6370_CHAN_VBAT] = "vbat",
+ [MT6370_CHAN_TS_BAT] = "ts_bat",
+ [MT6370_CHAN_IBUS] = "ibus",
+ [MT6370_CHAN_IBAT] = "ibat",
+ [MT6370_CHAN_CHG_VDDP] = "chg_vddp",
+ [MT6370_CHAN_TEMP_JC] = "temp_jc",
+};
+
+static int mt6370_adc_read_label(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *chan, char *label)
+{
+ return sysfs_emit(label, "%s\n", mt6370_channel_labels[chan->channel]);
+}
+
+static const struct iio_info mt6370_adc_iio_info = {
+ .read_raw = mt6370_adc_read_raw,
+ .read_label = mt6370_adc_read_label,
+};
+
+#define MT6370_ADC_CHAN(_idx, _type, _addr, _extra_info) { \
+ .type = _type, \
+ .channel = MT6370_CHAN_##_idx, \
+ .address = _addr, \
+ .scan_index = MT6370_CHAN_##_idx, \
+ .indexed = 1, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_SCALE) | \
+ _extra_info, \
+}
+
+static const struct iio_chan_spec mt6370_adc_channels[] = {
+ MT6370_ADC_CHAN(VBUSDIV5, IIO_VOLTAGE, 1, 0),
+ MT6370_ADC_CHAN(VBUSDIV2, IIO_VOLTAGE, 2, 0),
+ MT6370_ADC_CHAN(VSYS, IIO_VOLTAGE, 3, 0),
+ MT6370_ADC_CHAN(VBAT, IIO_VOLTAGE, 4, 0),
+ MT6370_ADC_CHAN(TS_BAT, IIO_VOLTAGE, 6, 0),
+ MT6370_ADC_CHAN(IBUS, IIO_CURRENT, 8, 0),
+ MT6370_ADC_CHAN(IBAT, IIO_CURRENT, 9, 0),
+ MT6370_ADC_CHAN(CHG_VDDP, IIO_VOLTAGE, 11, 0),
+ MT6370_ADC_CHAN(TEMP_JC, IIO_TEMP, 12, BIT(IIO_CHAN_INFO_OFFSET)),
+};
+
+static int mt6370_adc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mt6370_adc_data *priv;
+ struct iio_dev *indio_dev;
+ struct regmap *regmap;
+ int ret;
+
+ regmap = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!regmap)
+ return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*priv));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ priv = iio_priv(indio_dev);
+ priv->dev = dev;
+ priv->regmap = regmap;
+ mutex_init(&priv->adc_lock);
+
+ ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, 0);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to reset ADC\n");
+
+ indio_dev->name = "mt6370-adc";
+ indio_dev->info = &mt6370_adc_iio_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = mt6370_adc_channels;
+ indio_dev->num_channels = ARRAY_SIZE(mt6370_adc_channels);
+
+ return devm_iio_device_register(dev, indio_dev);
+}
+
+static const struct of_device_id mt6370_adc_of_id[] = {
+ { .compatible = "mediatek,mt6370-adc", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, mt6370_adc_of_id);
+
+static struct platform_driver mt6370_adc_driver = {
+ .driver = {
+ .name = "mt6370-adc",
+ .of_match_table = mt6370_adc_of_id,
+ },
+ .probe = mt6370_adc_probe,
+};
+module_platform_driver(mt6370_adc_driver);
+
+MODULE_AUTHOR("ChiaEn Wu <[email protected]>");
+MODULE_DESCRIPTION("MT6370 ADC Driver");
+MODULE_LICENSE("GPL v2");
--
2.7.4
From: ChiYuan Huang <[email protected]>
Add MediaTek MT6370 current sink type LED indicator binding documentation.
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: ChiYuan Huang <[email protected]>
Signed-off-by: ChiaEn Wu <[email protected]>
---
.../bindings/leds/mediatek,mt6370-indicator.yaml | 81 ++++++++++++++++++++++
1 file changed, 81 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/mediatek,mt6370-indicator.yaml
diff --git a/Documentation/devicetree/bindings/leds/mediatek,mt6370-indicator.yaml b/Documentation/devicetree/bindings/leds/mediatek,mt6370-indicator.yaml
new file mode 100644
index 0000000..204b103
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/mediatek,mt6370-indicator.yaml
@@ -0,0 +1,81 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/mediatek,mt6370-indicator.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: LED driver for MT6370 PMIC from MediaTek Integrated.
+
+maintainers:
+ - Alice Chen <[email protected]>
+
+description: |
+ This module is part of the MT6370 MFD device.
+ Add MT6370 LED driver include 4-channel RGB LED support Register/PWM/Breath Mode
+
+allOf:
+ - $ref: leds-class-multicolor.yaml#
+
+properties:
+ compatible:
+ const: mediatek,mt6370-indicator
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
+patternProperties:
+ "^multi-led@[0-3]$":
+ type: object
+
+ properties:
+ reg:
+ enum: [0, 1, 2, 3]
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
+ patternProperties:
+ "^led@[0-2]$":
+ type: object
+ $ref: common.yaml#
+ unevaluatedProperties: false
+
+ properties:
+ reg:
+ enum: [0, 1, 2]
+
+ required:
+ - reg
+ - color
+
+ required:
+ - reg
+ - color
+ - "#address-cells"
+ - "#size-cells"
+
+ "^led@[0-3]$":
+ type: object
+ $ref: common.yaml#
+ unevaluatedProperties: false
+
+ properties:
+ reg:
+ enum: [0, 1, 2, 3]
+
+ required:
+ - reg
+ - color
+
+required:
+ - compatible
+ - "#address-cells"
+ - "#size-cells"
+
+additionalProperties: false
--
2.7.4
From: ChiYuan Huang <[email protected]>
This adds support for the MediaTek MT6370 SubPMIC. 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.
Reviewed-by: Andy Shevchenko <[email protected]>
Signed-off-by: ChiYuan Huang <[email protected]>
Signed-off-by: ChiaEn Wu <[email protected]>
---
v7
- Move '#define MT6370_REG_MAXADDR' to the next line of
'#define MT6370_REG_CHG_MASK1'
- Rename 'MT6370_REG_ADDRLEN' to 'MT6370_MAX_ADDRLEN'
---
drivers/mfd/Kconfig | 16 +++
drivers/mfd/Makefile | 1 +
drivers/mfd/mt6370.c | 312 +++++++++++++++++++++++++++++++++++++++++++++++++++
drivers/mfd/mt6370.h | 99 ++++++++++++++++
4 files changed, 428 insertions(+)
create mode 100644 drivers/mfd/mt6370.c
create mode 100644 drivers/mfd/mt6370.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 9566341..0666bda 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -938,6 +938,22 @@ config MFD_MT6360
PMIC part includes 2-channel BUCKs and 2-channel LDOs
LDO part includes 4-channel LDOs
+config MFD_MT6370
+ tristate "MediaTek MT6370 SubPMIC"
+ select MFD_CORE
+ select REGMAP_I2C
+ select REGMAP_IRQ
+ depends on I2C
+ help
+ Say Y here to enable MT6370 SubPMIC functional support.
+ It consists 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.
+
+ This driver can also be built as a module. If so, the module
+ will be called "mt6370".
+
config MFD_MT6397
tristate "MediaTek MT6397 PMIC Support"
select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 8c69867..81dbed3 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -173,6 +173,7 @@ obj-$(CONFIG_MFD_MAX8998) += max8998.o max8998-irq.o
obj-$(CONFIG_MFD_MP2629) += mp2629.o
obj-$(CONFIG_MFD_MT6360) += mt6360-core.o
+obj-$(CONFIG_MFD_MT6370) += mt6370.o
mt6397-objs := mt6397-core.o mt6397-irq.o mt6358-irq.o
obj-$(CONFIG_MFD_MT6397) += mt6397.o
diff --git a/drivers/mfd/mt6370.c b/drivers/mfd/mt6370.c
new file mode 100644
index 0000000..cf19cce
--- /dev/null
+++ b/drivers/mfd/mt6370.c
@@ -0,0 +1,312 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Author: ChiYuan Huang <[email protected]>
+ */
+
+#include <linux/bits.h>
+#include <linux/bitfield.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "mt6370.h"
+
+#define MT6370_REG_DEV_INFO 0x100
+#define MT6370_REG_CHG_IRQ1 0x1C0
+#define MT6370_REG_CHG_MASK1 0x1E0
+#define MT6370_REG_MAXADDR 0x1FF
+
+#define MT6370_VENID_MASK GENMASK(7, 4)
+
+#define MT6370_NUM_IRQREGS 16
+#define MT6370_USBC_I2CADDR 0x4E
+#define MT6370_MAX_ADDRLEN 2
+
+#define MT6370_VENID_RT5081 0x8
+#define MT6370_VENID_RT5081A 0xA
+#define MT6370_VENID_MT6370 0xE
+#define MT6370_VENID_MT6371 0xF
+#define MT6370_VENID_MT6372P 0x9
+#define MT6370_VENID_MT6372CP 0xB
+
+static const struct regmap_irq mt6370_irqs[] = {
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHGON, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_TREG, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_AICR, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_MIVR, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_PWR_RDY, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FL_CHG_VINOVP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VSYSUV, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VSYSOV, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VBATOV, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VINOVPCHG, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_COLD, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_COOL, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_WARM, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_HOT, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_STATC, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_FAULT, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_STATC, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_TMR, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_BATABS, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_ADPBAD, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_RVP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_TSHUTDOWN, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_IINMEAS, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_ICCMEAS, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHGDET_DONE, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_WDTMR, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_SSFINISH, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_RECHG, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_TERM, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_IEOC, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_ADC_DONE, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_PUMPX_DONE, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_BST_BATUV, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_BST_MIDOV, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_BST_OLP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_ATTACH, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DETACH, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_HVDCP_STPDONE, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_HVDCP_VBUSDET_DONE, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_HVDCP_DET, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHGDET, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DCDT, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_VGOK, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_WDTMR, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_UC, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_OC, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_OV, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_SWON, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_UVP_D, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_UVP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_OVP_D, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_OVP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_STRBPIN, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_TORPIN, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_TX, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_LVF, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED2_SHORT, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_SHORT, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED2_STRB, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_STRB, 8),
+ REGMAP_IRQ_REG_LINE(mT6370_IRQ_FLED2_STRB_TO, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_STRB_TO, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED2_TOR, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_TOR, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_OTP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_VDDA_OVP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_VDDA_UV, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_LDO_OC, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_BLED_OCP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_BLED_OVP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VNEG_OCP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VPOS_OCP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_BST_OCP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VNEG_SCP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VPOS_SCP, 8),
+};
+
+static const struct regmap_irq_chip mt6370_irq_chip = {
+ .name = "mt6370-irqs",
+ .status_base = MT6370_REG_CHG_IRQ1,
+ .mask_base = MT6370_REG_CHG_MASK1,
+ .num_regs = MT6370_NUM_IRQREGS,
+ .irqs = mt6370_irqs,
+ .num_irqs = ARRAY_SIZE(mt6370_irqs),
+};
+
+static const struct resource mt6370_regulator_irqs[] = {
+ DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VPOS_SCP, "db_vpos_scp"),
+ DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VNEG_SCP, "db_vneg_scp"),
+ DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_BST_OCP, "db_vbst_ocp"),
+ DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VPOS_OCP, "db_vpos_ocp"),
+ DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VNEG_OCP, "db_vneg_ocp"),
+ DEFINE_RES_IRQ_NAMED(MT6370_IRQ_LDO_OC, "ldo_oc"),
+};
+
+static const struct mfd_cell mt6370_devices[] = {
+ MFD_CELL_OF("mt6370-adc",
+ NULL, NULL, 0, 0, "mediatek,mt6370-adc"),
+ MFD_CELL_OF("mt6370-charger",
+ NULL, NULL, 0, 0, "mediatek,mt6370-charger"),
+ MFD_CELL_OF("mt6370-flashlight",
+ NULL, NULL, 0, 0, "mediatek,mt6370-flashlight"),
+ MFD_CELL_OF("mt6370-indicator",
+ NULL, NULL, 0, 0, "mediatek,mt6370-indicator"),
+ MFD_CELL_OF("mt6370-tcpc",
+ NULL, NULL, 0, 0, "mediatek,mt6370-tcpc"),
+ MFD_CELL_RES("mt6370-regulator", mt6370_regulator_irqs),
+};
+
+static const struct mfd_cell mt6370_exclusive_devices[] = {
+ MFD_CELL_OF("mt6370-backlight",
+ NULL, NULL, 0, 0, "mediatek,mt6370-backlight"),
+};
+
+static const struct mfd_cell mt6372_exclusive_devices[] = {
+ MFD_CELL_OF("mt6370-backlight",
+ NULL, NULL, 0, 0, "mediatek,mt6372-backlight"),
+};
+
+static int mt6370_check_vendor_info(struct device *dev, struct regmap *rmap,
+ int *vid)
+{
+ unsigned int devinfo;
+ int ret;
+
+ ret = regmap_read(rmap, MT6370_REG_DEV_INFO, &devinfo);
+ if (ret)
+ return ret;
+
+ *vid = FIELD_GET(MT6370_VENID_MASK, devinfo);
+ switch (*vid) {
+ case MT6370_VENID_RT5081:
+ case MT6370_VENID_RT5081A:
+ case MT6370_VENID_MT6370:
+ case MT6370_VENID_MT6371:
+ case MT6370_VENID_MT6372P:
+ case MT6370_VENID_MT6372CP:
+ return 0;
+ default:
+ dev_err(dev, "Unknown Vendor ID 0x%02x\n", devinfo);
+ return -ENODEV;
+ }
+}
+
+static int mt6370_regmap_read(void *context, const void *reg_buf,
+ size_t reg_size, void *val_buf, size_t val_size)
+{
+ struct mt6370_info *info = context;
+ const u8 *u8_buf = reg_buf;
+ u8 bank_idx, bank_addr;
+ int ret;
+
+ bank_idx = u8_buf[0];
+ bank_addr = u8_buf[1];
+
+ ret = i2c_smbus_read_i2c_block_data(info->i2c[bank_idx], bank_addr,
+ val_size, val_buf);
+ if (ret < 0)
+ return ret;
+
+ if (ret != val_size)
+ return -EIO;
+
+ return 0;
+}
+
+static int mt6370_regmap_write(void *context, const void *data, size_t count)
+{
+ struct mt6370_info *info = context;
+ const u8 *u8_buf = data;
+ u8 bank_idx, bank_addr;
+ int len = count - MT6370_MAX_ADDRLEN;
+
+ bank_idx = u8_buf[0];
+ bank_addr = u8_buf[1];
+
+ return i2c_smbus_write_i2c_block_data(info->i2c[bank_idx], bank_addr,
+ len, data + MT6370_MAX_ADDRLEN);
+}
+
+static const struct regmap_bus mt6370_regmap_bus = {
+ .read = mt6370_regmap_read,
+ .write = mt6370_regmap_write,
+};
+
+static const struct regmap_config mt6370_regmap_config = {
+ .reg_bits = 16,
+ .val_bits = 8,
+ .reg_format_endian = REGMAP_ENDIAN_BIG,
+ .max_register = MT6370_REG_MAXADDR,
+};
+
+static int mt6370_probe(struct i2c_client *i2c)
+{
+ struct mt6370_info *info;
+ struct i2c_client *usbc_i2c;
+ struct regmap *regmap;
+ struct device *dev = &i2c->dev;
+ int ret, vid;
+
+ info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ usbc_i2c = devm_i2c_new_dummy_device(dev, i2c->adapter,
+ MT6370_USBC_I2CADDR);
+ if (IS_ERR(usbc_i2c))
+ return dev_err_probe(dev, PTR_ERR(usbc_i2c),
+ "Failed to register USBC I2C client\n");
+
+ /* Assign I2C client for PMU and TypeC */
+ info->i2c[MT6370_PMU_I2C] = i2c;
+ info->i2c[MT6370_USBC_I2C] = usbc_i2c;
+
+ regmap = devm_regmap_init(dev, &mt6370_regmap_bus,
+ info, &mt6370_regmap_config);
+ if (IS_ERR(regmap))
+ return dev_err_probe(dev, PTR_ERR(regmap),
+ "Failed to init regmap\n");
+
+ ret = mt6370_check_vendor_info(dev, regmap, &vid);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to check vendor info\n");
+
+ ret = devm_regmap_add_irq_chip(dev, regmap, i2c->irq,
+ IRQF_ONESHOT, -1, &mt6370_irq_chip,
+ &info->irq_data);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to add irq chip\n");
+
+ switch (vid) {
+ case MT6370_VENID_MT6372P:
+ case MT6370_VENID_MT6372CP:
+ ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO,
+ mt6372_exclusive_devices,
+ ARRAY_SIZE(mt6372_exclusive_devices),
+ NULL, 0,
+ regmap_irq_get_domain(info->irq_data));
+ break;
+ default:
+ ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO,
+ mt6370_exclusive_devices,
+ ARRAY_SIZE(mt6370_exclusive_devices),
+ NULL, 0,
+ regmap_irq_get_domain(info->irq_data));
+ break;
+ }
+
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to add the exclusive devices\n");
+
+ return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO,
+ mt6370_devices, ARRAY_SIZE(mt6370_devices),
+ NULL, 0,
+ regmap_irq_get_domain(info->irq_data));
+}
+
+static const struct of_device_id mt6370_match_table[] = {
+ { .compatible = "mediatek,mt6370" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, mt6370_match_table);
+
+static struct i2c_driver mt6370_driver = {
+ .driver = {
+ .name = "mt6370",
+ .of_match_table = mt6370_match_table,
+ },
+ .probe_new = mt6370_probe,
+};
+module_i2c_driver(mt6370_driver);
+
+MODULE_AUTHOR("ChiYuan Huang <[email protected]>");
+MODULE_DESCRIPTION("MediaTek MT6370 SubPMIC Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/mfd/mt6370.h b/drivers/mfd/mt6370.h
new file mode 100644
index 0000000..094e59e
--- /dev/null
+++ b/drivers/mfd/mt6370.h
@@ -0,0 +1,99 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Author: ChiYuan Huang <[email protected]>
+ */
+
+#ifndef __MFD_MT6370_H__
+#define __MFD_MT6370_H__
+
+/* IRQ definitions */
+#define MT6370_IRQ_DIRCHGON 0
+#define MT6370_IRQ_CHG_TREG 4
+#define MT6370_IRQ_CHG_AICR 5
+#define MT6370_IRQ_CHG_MIVR 6
+#define MT6370_IRQ_PWR_RDY 7
+#define MT6370_IRQ_FL_CHG_VINOVP 11
+#define MT6370_IRQ_CHG_VSYSUV 12
+#define MT6370_IRQ_CHG_VSYSOV 13
+#define MT6370_IRQ_CHG_VBATOV 14
+#define MT6370_IRQ_CHG_VINOVPCHG 15
+#define MT6370_IRQ_TS_BAT_COLD 20
+#define MT6370_IRQ_TS_BAT_COOL 21
+#define MT6370_IRQ_TS_BAT_WARM 22
+#define MT6370_IRQ_TS_BAT_HOT 23
+#define MT6370_IRQ_TS_STATC 24
+#define MT6370_IRQ_CHG_FAULT 25
+#define MT6370_IRQ_CHG_STATC 26
+#define MT6370_IRQ_CHG_TMR 27
+#define MT6370_IRQ_CHG_BATABS 28
+#define MT6370_IRQ_CHG_ADPBAD 29
+#define MT6370_IRQ_CHG_RVP 30
+#define MT6370_IRQ_TSHUTDOWN 31
+#define MT6370_IRQ_CHG_IINMEAS 32
+#define MT6370_IRQ_CHG_ICCMEAS 33
+#define MT6370_IRQ_CHGDET_DONE 34
+#define MT6370_IRQ_WDTMR 35
+#define MT6370_IRQ_SSFINISH 36
+#define MT6370_IRQ_CHG_RECHG 37
+#define MT6370_IRQ_CHG_TERM 38
+#define MT6370_IRQ_CHG_IEOC 39
+#define MT6370_IRQ_ADC_DONE 40
+#define MT6370_IRQ_PUMPX_DONE 41
+#define MT6370_IRQ_BST_BATUV 45
+#define MT6370_IRQ_BST_MIDOV 46
+#define MT6370_IRQ_BST_OLP 47
+#define MT6370_IRQ_ATTACH 48
+#define MT6370_IRQ_DETACH 49
+#define MT6370_IRQ_HVDCP_STPDONE 51
+#define MT6370_IRQ_HVDCP_VBUSDET_DONE 52
+#define MT6370_IRQ_HVDCP_DET 53
+#define MT6370_IRQ_CHGDET 54
+#define MT6370_IRQ_DCDT 55
+#define MT6370_IRQ_DIRCHG_VGOK 59
+#define MT6370_IRQ_DIRCHG_WDTMR 60
+#define MT6370_IRQ_DIRCHG_UC 61
+#define MT6370_IRQ_DIRCHG_OC 62
+#define MT6370_IRQ_DIRCHG_OV 63
+#define MT6370_IRQ_OVPCTRL_SWON 67
+#define MT6370_IRQ_OVPCTRL_UVP_D 68
+#define MT6370_IRQ_OVPCTRL_UVP 69
+#define MT6370_IRQ_OVPCTRL_OVP_D 70
+#define MT6370_IRQ_OVPCTRL_OVP 71
+#define MT6370_IRQ_FLED_STRBPIN 72
+#define MT6370_IRQ_FLED_TORPIN 73
+#define MT6370_IRQ_FLED_TX 74
+#define MT6370_IRQ_FLED_LVF 75
+#define MT6370_IRQ_FLED2_SHORT 78
+#define MT6370_IRQ_FLED1_SHORT 79
+#define MT6370_IRQ_FLED2_STRB 80
+#define MT6370_IRQ_FLED1_STRB 81
+#define mT6370_IRQ_FLED2_STRB_TO 82
+#define MT6370_IRQ_FLED1_STRB_TO 83
+#define MT6370_IRQ_FLED2_TOR 84
+#define MT6370_IRQ_FLED1_TOR 85
+#define MT6370_IRQ_OTP 93
+#define MT6370_IRQ_VDDA_OVP 94
+#define MT6370_IRQ_VDDA_UV 95
+#define MT6370_IRQ_LDO_OC 103
+#define MT6370_IRQ_BLED_OCP 118
+#define MT6370_IRQ_BLED_OVP 119
+#define MT6370_IRQ_DSV_VNEG_OCP 123
+#define MT6370_IRQ_DSV_VPOS_OCP 124
+#define MT6370_IRQ_DSV_BST_OCP 125
+#define MT6370_IRQ_DSV_VNEG_SCP 126
+#define MT6370_IRQ_DSV_VPOS_SCP 127
+
+enum {
+ MT6370_USBC_I2C = 0,
+ MT6370_PMU_I2C,
+ MT6370_MAX_I2C
+};
+
+struct mt6370_info {
+ struct i2c_client *i2c[MT6370_MAX_I2C];
+ struct regmap_irq_chip_data *irq_data;
+};
+
+#endif /* __MFD_MT6375_H__ */
--
2.7.4
On Fri, Aug 5, 2022 at 9:07 AM ChiaEn Wu <[email protected]> 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 a support for the MT6370 ADC driver for system monitoring, including
> charger current, voltage, and temperature.
On Fri, Aug 5, 2022 at 9:07 AM ChiaEn Wu <[email protected]> wrote:
>
> 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 a support for the Type-C & Power Delivery controller in
> MediaTek MT6370 IC.
Reviewed-by: Andy Shevchenko <[email protected]>
> Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
> Signed-off-by: ChiaEn Wu <[email protected]>
> ---
>
> v7
> - 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
> ---
> drivers/iio/adc/Kconfig | 12 ++
> drivers/iio/adc/Makefile | 1 +
> drivers/iio/adc/mt6370-adc.c | 305 +++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 318 insertions(+)
> create mode 100644 drivers/iio/adc/mt6370-adc.c
>
> diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
> index 7fe5930..995cbb5 100644
> --- a/drivers/iio/adc/Kconfig
> +++ b/drivers/iio/adc/Kconfig
> @@ -736,6 +736,18 @@ config MEDIATEK_MT6360_ADC
> is used in smartphones and tablets and supports a 11 channel
> general purpose ADC.
>
> +config MEDIATEK_MT6370_ADC
> + tristate "MediaTek MT6370 ADC driver"
> + depends on MFD_MT6370
> + help
> + Say yes here to enable MediaTek MT6370 ADC support.
> +
> + This ADC driver provides 9 channels for system monitoring (charger
> + current, voltage, and temperature).
> +
> + This driver can also be built as a module. If so, the module
> + will be called "mt6370-adc".
> +
> config MEDIATEK_MT6577_AUXADC
> tristate "MediaTek AUXADC driver"
> depends on ARCH_MEDIATEK || COMPILE_TEST
> diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
> index 1772a54..c6bc35f 100644
> --- a/drivers/iio/adc/Makefile
> +++ b/drivers/iio/adc/Makefile
> @@ -68,6 +68,7 @@ obj-$(CONFIG_MCP320X) += mcp320x.o
> obj-$(CONFIG_MCP3422) += mcp3422.o
> obj-$(CONFIG_MCP3911) += mcp3911.o
> obj-$(CONFIG_MEDIATEK_MT6360_ADC) += mt6360-adc.o
> +obj-$(CONFIG_MEDIATEK_MT6370_ADC) += mt6370-adc.o
> obj-$(CONFIG_MEDIATEK_MT6577_AUXADC) += mt6577_auxadc.o
> obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o
> obj-$(CONFIG_MESON_SARADC) += meson_saradc.o
> diff --git a/drivers/iio/adc/mt6370-adc.c b/drivers/iio/adc/mt6370-adc.c
> new file mode 100644
> index 0000000..2a46471
> --- /dev/null
> +++ b/drivers/iio/adc/mt6370-adc.c
> @@ -0,0 +1,305 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2022 Richtek Technology Corp.
> + *
> + * Author: ChiaEn Wu <[email protected]>
> + */
> +
> +#include <linux/bits.h>
> +#include <linux/bitfield.h>
> +#include <linux/iio/iio.h>
> +#include <linux/kernel.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/module.h>
> +#include <linux/mutex.h>
> +#include <linux/platform_device.h>
> +#include <linux/regmap.h>
> +#include <linux/sysfs.h>
> +#include <linux/units.h>
> +
> +#include <dt-bindings/iio/adc/mediatek,mt6370_adc.h>
> +
> +#define MT6370_REG_CHG_CTRL3 0x113
> +#define MT6370_REG_CHG_CTRL7 0x117
> +#define MT6370_REG_CHG_ADC 0x121
> +#define MT6370_REG_ADC_DATA_H 0x14C
> +
> +#define MT6370_ADC_START_MASK BIT(0)
> +#define MT6370_ADC_IN_SEL_MASK GENMASK(7, 4)
> +#define MT6370_AICR_ICHG_MASK GENMASK(7, 2)
> +
> +#define MT6370_AICR_100_mA 0x0
> +#define MT6370_AICR_150_mA 0x1
> +#define MT6370_AICR_200_mA 0x2
> +#define MT6370_AICR_250_mA 0x3
> +#define MT6370_AICR_300_mA 0x4
> +#define MT6370_AICR_350_mA 0x5
> +
> +#define MT6370_ICHG_100_mA 0x0
> +#define MT6370_ICHG_200_mA 0x1
> +#define MT6370_ICHG_300_mA 0x2
> +#define MT6370_ICHG_400_mA 0x3
> +#define MT6370_ICHG_500_mA 0x4
> +#define MT6370_ICHG_600_mA 0x5
> +#define MT6370_ICHG_700_mA 0x6
> +#define MT6370_ICHG_800_mA 0x7
> +
> +#define ADC_CONV_TIME_MS 35
> +#define ADC_CONV_POLLING_TIME_US 1000
> +
> +struct mt6370_adc_data {
> + struct device *dev;
> + struct regmap *regmap;
> + /*
> + * This mutex lock is for preventing the different ADC channels
> + * from being read at the same time.
> + */
> + struct mutex adc_lock;
> +};
> +
> +static int mt6370_adc_read_channel(struct mt6370_adc_data *priv, int chan,
> + unsigned long addr, int *val)
> +{
> + unsigned int reg_val;
> + __be16 be_val;
> + int ret;
> +
> + mutex_lock(&priv->adc_lock);
> +
> + reg_val = MT6370_ADC_START_MASK |
> + FIELD_PREP(MT6370_ADC_IN_SEL_MASK, addr);
> + ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, reg_val);
> + if (ret)
> + goto adc_unlock;
> +
> + msleep(ADC_CONV_TIME_MS);
> +
> + ret = regmap_read_poll_timeout(priv->regmap,
> + MT6370_REG_CHG_ADC, reg_val,
> + !(reg_val & MT6370_ADC_START_MASK),
> + ADC_CONV_POLLING_TIME_US,
> + ADC_CONV_TIME_MS * MILLI * 3);
> + if (ret) {
> + dev_err(priv->dev, "Failed to read ADC register (%d)\n", ret);
> + goto adc_unlock;
> + }
> +
> + ret = regmap_raw_read(priv->regmap, MT6370_REG_ADC_DATA_H,
> + &be_val, sizeof(be_val));
> + if (ret)
> + goto adc_unlock;
> +
> + *val = be16_to_cpu(be_val);
> + ret = IIO_VAL_INT;
> +
> +adc_unlock:
> + mutex_unlock(&priv->adc_lock);
> +
> + return ret;
> +}
> +
> +static int mt6370_adc_read_scale(struct mt6370_adc_data *priv,
> + int chan, int *val1, int *val2)
> +{
> + unsigned int reg_val;
> + int ret;
> +
> + switch (chan) {
> + case MT6370_CHAN_VBAT:
> + case MT6370_CHAN_VSYS:
> + case MT6370_CHAN_CHG_VDDP:
> + *val1 = 5;
> + return IIO_VAL_INT;
> + case MT6370_CHAN_IBUS:
> + ret = regmap_read(priv->regmap, MT6370_REG_CHG_CTRL3, ®_val);
> + if (ret)
> + return ret;
> +
> + reg_val = FIELD_GET(MT6370_AICR_ICHG_MASK, reg_val);
> + switch (reg_val) {
> + case MT6370_AICR_100_mA:
> + case MT6370_AICR_150_mA:
> + case MT6370_AICR_200_mA:
> + case MT6370_AICR_250_mA:
> + case MT6370_AICR_300_mA:
> + case MT6370_AICR_350_mA:
> + *val1 = 3350;
> + break;
> + default:
> + *val1 = 5000;
> + break;
> + }
> +
> + *val2 = 100;
> +
> + return IIO_VAL_FRACTIONAL;
> + case MT6370_CHAN_IBAT:
> + ret = regmap_read(priv->regmap, MT6370_REG_CHG_CTRL7, ®_val);
> + if (ret)
> + return ret;
> +
> + reg_val = FIELD_GET(MT6370_AICR_ICHG_MASK, reg_val);
> + switch (reg_val) {
> + case MT6370_ICHG_100_mA:
> + case MT6370_ICHG_200_mA:
> + case MT6370_ICHG_300_mA:
> + case MT6370_ICHG_400_mA:
> + *val1 = 2375;
> + break;
> + case MT6370_ICHG_500_mA:
> + case MT6370_ICHG_600_mA:
> + case MT6370_ICHG_700_mA:
> + case MT6370_ICHG_800_mA:
> + *val1 = 2680;
> + break;
> + default:
> + *val1 = 5000;
> + break;
> + }
> +
> + *val2 = 100;
> +
> + return IIO_VAL_FRACTIONAL;
> + case MT6370_CHAN_VBUSDIV5:
> + *val1 = 25;
> + return IIO_VAL_INT;
> + case MT6370_CHAN_VBUSDIV2:
> + *val1 = 50;
> + return IIO_VAL_INT;
> + case MT6370_CHAN_TS_BAT:
> + *val1 = 25;
> + *val2 = 10000;
> + return IIO_VAL_FRACTIONAL;
> + case MT6370_CHAN_TEMP_JC:
> + *val1 = 2000;
> + return IIO_VAL_FRACTIONAL;
> + default:
> + return -EINVAL;
> + }
> +}
> +
> +static int mt6370_adc_read_offset(struct mt6370_adc_data *priv,
> + int chan, int *val)
> +{
> + *val = -20;
> +
> + return IIO_VAL_INT;
> +}
> +
> +static int mt6370_adc_read_raw(struct iio_dev *iio_dev,
> + const struct iio_chan_spec *chan,
> + int *val, int *val2, long mask)
> +{
> + struct mt6370_adc_data *priv = iio_priv(iio_dev);
> +
> + switch (mask) {
> + case IIO_CHAN_INFO_RAW:
> + return mt6370_adc_read_channel(priv, chan->channel,
> + chan->address, val);
> + case IIO_CHAN_INFO_SCALE:
> + return mt6370_adc_read_scale(priv, chan->channel, val, val2);
> + case IIO_CHAN_INFO_OFFSET:
> + return mt6370_adc_read_offset(priv, chan->channel, val);
> + default:
> + return -EINVAL;
> + }
> +}
> +
> +static const char * const mt6370_channel_labels[MT6370_CHAN_MAX] = {
> + [MT6370_CHAN_VBUSDIV5] = "vbusdiv5",
> + [MT6370_CHAN_VBUSDIV2] = "vbusdiv2",
> + [MT6370_CHAN_VSYS] = "vsys",
> + [MT6370_CHAN_VBAT] = "vbat",
> + [MT6370_CHAN_TS_BAT] = "ts_bat",
> + [MT6370_CHAN_IBUS] = "ibus",
> + [MT6370_CHAN_IBAT] = "ibat",
> + [MT6370_CHAN_CHG_VDDP] = "chg_vddp",
> + [MT6370_CHAN_TEMP_JC] = "temp_jc",
> +};
> +
> +static int mt6370_adc_read_label(struct iio_dev *iio_dev,
> + struct iio_chan_spec const *chan, char *label)
> +{
> + return sysfs_emit(label, "%s\n", mt6370_channel_labels[chan->channel]);
> +}
> +
> +static const struct iio_info mt6370_adc_iio_info = {
> + .read_raw = mt6370_adc_read_raw,
> + .read_label = mt6370_adc_read_label,
> +};
> +
> +#define MT6370_ADC_CHAN(_idx, _type, _addr, _extra_info) { \
> + .type = _type, \
> + .channel = MT6370_CHAN_##_idx, \
> + .address = _addr, \
> + .scan_index = MT6370_CHAN_##_idx, \
> + .indexed = 1, \
> + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
> + BIT(IIO_CHAN_INFO_SCALE) | \
> + _extra_info, \
> +}
> +
> +static const struct iio_chan_spec mt6370_adc_channels[] = {
> + MT6370_ADC_CHAN(VBUSDIV5, IIO_VOLTAGE, 1, 0),
> + MT6370_ADC_CHAN(VBUSDIV2, IIO_VOLTAGE, 2, 0),
> + MT6370_ADC_CHAN(VSYS, IIO_VOLTAGE, 3, 0),
> + MT6370_ADC_CHAN(VBAT, IIO_VOLTAGE, 4, 0),
> + MT6370_ADC_CHAN(TS_BAT, IIO_VOLTAGE, 6, 0),
> + MT6370_ADC_CHAN(IBUS, IIO_CURRENT, 8, 0),
> + MT6370_ADC_CHAN(IBAT, IIO_CURRENT, 9, 0),
> + MT6370_ADC_CHAN(CHG_VDDP, IIO_VOLTAGE, 11, 0),
> + MT6370_ADC_CHAN(TEMP_JC, IIO_TEMP, 12, BIT(IIO_CHAN_INFO_OFFSET)),
> +};
> +
> +static int mt6370_adc_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct mt6370_adc_data *priv;
> + struct iio_dev *indio_dev;
> + struct regmap *regmap;
> + int ret;
> +
> + regmap = dev_get_regmap(pdev->dev.parent, NULL);
> + if (!regmap)
> + return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");
> +
> + indio_dev = devm_iio_device_alloc(dev, sizeof(*priv));
> + if (!indio_dev)
> + return -ENOMEM;
> +
> + priv = iio_priv(indio_dev);
> + priv->dev = dev;
> + priv->regmap = regmap;
> + mutex_init(&priv->adc_lock);
> +
> + ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, 0);
> + if (ret)
> + return dev_err_probe(dev, ret, "Failed to reset ADC\n");
> +
> + indio_dev->name = "mt6370-adc";
> + indio_dev->info = &mt6370_adc_iio_info;
> + indio_dev->modes = INDIO_DIRECT_MODE;
> + indio_dev->channels = mt6370_adc_channels;
> + indio_dev->num_channels = ARRAY_SIZE(mt6370_adc_channels);
> +
> + return devm_iio_device_register(dev, indio_dev);
> +}
> +
> +static const struct of_device_id mt6370_adc_of_id[] = {
> + { .compatible = "mediatek,mt6370-adc", },
> + {}
> +};
> +MODULE_DEVICE_TABLE(of, mt6370_adc_of_id);
> +
> +static struct platform_driver mt6370_adc_driver = {
> + .driver = {
> + .name = "mt6370-adc",
> + .of_match_table = mt6370_adc_of_id,
> + },
> + .probe = mt6370_adc_probe,
> +};
> +module_platform_driver(mt6370_adc_driver);
> +
> +MODULE_AUTHOR("ChiaEn Wu <[email protected]>");
> +MODULE_DESCRIPTION("MT6370 ADC Driver");
> +MODULE_LICENSE("GPL v2");
> --
> 2.7.4
>
--
With Best Regards,
Andy Shevchenko
On Fri, 05 Aug 2022, ChiaEn Wu wrote:
> From: ChiYuan Huang <[email protected]>
>
> This adds support for the MediaTek MT6370 SubPMIC. 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.
>
> Reviewed-by: Andy Shevchenko <[email protected]>
> Signed-off-by: ChiYuan Huang <[email protected]>
> Signed-off-by: ChiaEn Wu <[email protected]>
> ---
>
> v7
> - Move '#define MT6370_REG_MAXADDR' to the next line of
> '#define MT6370_REG_CHG_MASK1'
> - Rename 'MT6370_REG_ADDRLEN' to 'MT6370_MAX_ADDRLEN'
> ---
> drivers/mfd/Kconfig | 16 +++
> drivers/mfd/Makefile | 1 +
> drivers/mfd/mt6370.c | 312 +++++++++++++++++++++++++++++++++++++++++++++++++++
> drivers/mfd/mt6370.h | 99 ++++++++++++++++
> 4 files changed, 428 insertions(+)
> create mode 100644 drivers/mfd/mt6370.c
> create mode 100644 drivers/mfd/mt6370.h
Applied, thanks.
--
DEPRECATED: Please use [email protected]
On Fri, 5 Aug 2022 12:54:04 +0200
Andy Shevchenko <[email protected]> wrote:
> On Fri, Aug 5, 2022 at 9:07 AM ChiaEn Wu <[email protected]> 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 a support for the MT6370 ADC driver for system monitoring, including
> > charger current, voltage, and temperature.
>
> On Fri, Aug 5, 2022 at 9:07 AM ChiaEn Wu <[email protected]> wrote:
> >
> > 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 a support for the Type-C & Power Delivery controller in
> > MediaTek MT6370 IC.
>
> Reviewed-by: Andy Shevchenko <[email protected]>
Oops. I just noticed I replied only to Andy due to a misclick.
Acked-by: Jonathan Cameron <[email protected]>
I took a quick glance through, and with Andy's comments now all answered
to his satisfaction I'm fine with this going through the MFD tree
(or another path if one makes more sense).
Thanks to Andy for his reviewing effort on this one!
Note that because of the bindings header I think this has a build dependency on the
MFD binding patch.
Jonathan
>
> > Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
> > Signed-off-by: ChiaEn Wu <[email protected]>
> > ---
> >
> > v7
> > - 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
> > ---
> > drivers/iio/adc/Kconfig | 12 ++
> > drivers/iio/adc/Makefile | 1 +
> > drivers/iio/adc/mt6370-adc.c | 305 +++++++++++++++++++++++++++++++++++++++++++
> > 3 files changed, 318 insertions(+)
> > create mode 100644 drivers/iio/adc/mt6370-adc.c
> >
> > diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
> > index 7fe5930..995cbb5 100644
> > --- a/drivers/iio/adc/Kconfig
> > +++ b/drivers/iio/adc/Kconfig
> > @@ -736,6 +736,18 @@ config MEDIATEK_MT6360_ADC
> > is used in smartphones and tablets and supports a 11 channel
> > general purpose ADC.
> >
> > +config MEDIATEK_MT6370_ADC
> > + tristate "MediaTek MT6370 ADC driver"
> > + depends on MFD_MT6370
> > + help
> > + Say yes here to enable MediaTek MT6370 ADC support.
> > +
> > + This ADC driver provides 9 channels for system monitoring (charger
> > + current, voltage, and temperature).
> > +
> > + This driver can also be built as a module. If so, the module
> > + will be called "mt6370-adc".
> > +
> > config MEDIATEK_MT6577_AUXADC
> > tristate "MediaTek AUXADC driver"
> > depends on ARCH_MEDIATEK || COMPILE_TEST
> > diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
> > index 1772a54..c6bc35f 100644
> > --- a/drivers/iio/adc/Makefile
> > +++ b/drivers/iio/adc/Makefile
> > @@ -68,6 +68,7 @@ obj-$(CONFIG_MCP320X) += mcp320x.o
> > obj-$(CONFIG_MCP3422) += mcp3422.o
> > obj-$(CONFIG_MCP3911) += mcp3911.o
> > obj-$(CONFIG_MEDIATEK_MT6360_ADC) += mt6360-adc.o
> > +obj-$(CONFIG_MEDIATEK_MT6370_ADC) += mt6370-adc.o
> > obj-$(CONFIG_MEDIATEK_MT6577_AUXADC) += mt6577_auxadc.o
> > obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o
> > obj-$(CONFIG_MESON_SARADC) += meson_saradc.o
> > diff --git a/drivers/iio/adc/mt6370-adc.c b/drivers/iio/adc/mt6370-adc.c
> > new file mode 100644
> > index 0000000..2a46471
> > --- /dev/null
> > +++ b/drivers/iio/adc/mt6370-adc.c
> > @@ -0,0 +1,305 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
> > +/*
> > + * Copyright (C) 2022 Richtek Technology Corp.
> > + *
> > + * Author: ChiaEn Wu <[email protected]>
> > + */
> > +
> > +#include <linux/bits.h>
> > +#include <linux/bitfield.h>
> > +#include <linux/iio/iio.h>
> > +#include <linux/kernel.h>
> > +#include <linux/mod_devicetable.h>
> > +#include <linux/module.h>
> > +#include <linux/mutex.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/regmap.h>
> > +#include <linux/sysfs.h>
> > +#include <linux/units.h>
> > +
> > +#include <dt-bindings/iio/adc/mediatek,mt6370_adc.h>
> > +
> > +#define MT6370_REG_CHG_CTRL3 0x113
> > +#define MT6370_REG_CHG_CTRL7 0x117
> > +#define MT6370_REG_CHG_ADC 0x121
> > +#define MT6370_REG_ADC_DATA_H 0x14C
> > +
> > +#define MT6370_ADC_START_MASK BIT(0)
> > +#define MT6370_ADC_IN_SEL_MASK GENMASK(7, 4)
> > +#define MT6370_AICR_ICHG_MASK GENMASK(7, 2)
> > +
> > +#define MT6370_AICR_100_mA 0x0
> > +#define MT6370_AICR_150_mA 0x1
> > +#define MT6370_AICR_200_mA 0x2
> > +#define MT6370_AICR_250_mA 0x3
> > +#define MT6370_AICR_300_mA 0x4
> > +#define MT6370_AICR_350_mA 0x5
> > +
> > +#define MT6370_ICHG_100_mA 0x0
> > +#define MT6370_ICHG_200_mA 0x1
> > +#define MT6370_ICHG_300_mA 0x2
> > +#define MT6370_ICHG_400_mA 0x3
> > +#define MT6370_ICHG_500_mA 0x4
> > +#define MT6370_ICHG_600_mA 0x5
> > +#define MT6370_ICHG_700_mA 0x6
> > +#define MT6370_ICHG_800_mA 0x7
> > +
> > +#define ADC_CONV_TIME_MS 35
> > +#define ADC_CONV_POLLING_TIME_US 1000
> > +
> > +struct mt6370_adc_data {
> > + struct device *dev;
> > + struct regmap *regmap;
> > + /*
> > + * This mutex lock is for preventing the different ADC channels
> > + * from being read at the same time.
> > + */
> > + struct mutex adc_lock;
> > +};
> > +
> > +static int mt6370_adc_read_channel(struct mt6370_adc_data *priv, int chan,
> > + unsigned long addr, int *val)
> > +{
> > + unsigned int reg_val;
> > + __be16 be_val;
> > + int ret;
> > +
> > + mutex_lock(&priv->adc_lock);
> > +
> > + reg_val = MT6370_ADC_START_MASK |
> > + FIELD_PREP(MT6370_ADC_IN_SEL_MASK, addr);
> > + ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, reg_val);
> > + if (ret)
> > + goto adc_unlock;
> > +
> > + msleep(ADC_CONV_TIME_MS);
> > +
> > + ret = regmap_read_poll_timeout(priv->regmap,
> > + MT6370_REG_CHG_ADC, reg_val,
> > + !(reg_val & MT6370_ADC_START_MASK),
> > + ADC_CONV_POLLING_TIME_US,
> > + ADC_CONV_TIME_MS * MILLI * 3);
> > + if (ret) {
> > + dev_err(priv->dev, "Failed to read ADC register (%d)\n", ret);
> > + goto adc_unlock;
> > + }
> > +
> > + ret = regmap_raw_read(priv->regmap, MT6370_REG_ADC_DATA_H,
> > + &be_val, sizeof(be_val));
> > + if (ret)
> > + goto adc_unlock;
> > +
> > + *val = be16_to_cpu(be_val);
> > + ret = IIO_VAL_INT;
> > +
> > +adc_unlock:
> > + mutex_unlock(&priv->adc_lock);
> > +
> > + return ret;
> > +}
> > +
> > +static int mt6370_adc_read_scale(struct mt6370_adc_data *priv,
> > + int chan, int *val1, int *val2)
> > +{
> > + unsigned int reg_val;
> > + int ret;
> > +
> > + switch (chan) {
> > + case MT6370_CHAN_VBAT:
> > + case MT6370_CHAN_VSYS:
> > + case MT6370_CHAN_CHG_VDDP:
> > + *val1 = 5;
> > + return IIO_VAL_INT;
> > + case MT6370_CHAN_IBUS:
> > + ret = regmap_read(priv->regmap, MT6370_REG_CHG_CTRL3, ®_val);
> > + if (ret)
> > + return ret;
> > +
> > + reg_val = FIELD_GET(MT6370_AICR_ICHG_MASK, reg_val);
> > + switch (reg_val) {
> > + case MT6370_AICR_100_mA:
> > + case MT6370_AICR_150_mA:
> > + case MT6370_AICR_200_mA:
> > + case MT6370_AICR_250_mA:
> > + case MT6370_AICR_300_mA:
> > + case MT6370_AICR_350_mA:
> > + *val1 = 3350;
> > + break;
> > + default:
> > + *val1 = 5000;
> > + break;
> > + }
> > +
> > + *val2 = 100;
> > +
> > + return IIO_VAL_FRACTIONAL;
> > + case MT6370_CHAN_IBAT:
> > + ret = regmap_read(priv->regmap, MT6370_REG_CHG_CTRL7, ®_val);
> > + if (ret)
> > + return ret;
> > +
> > + reg_val = FIELD_GET(MT6370_AICR_ICHG_MASK, reg_val);
> > + switch (reg_val) {
> > + case MT6370_ICHG_100_mA:
> > + case MT6370_ICHG_200_mA:
> > + case MT6370_ICHG_300_mA:
> > + case MT6370_ICHG_400_mA:
> > + *val1 = 2375;
> > + break;
> > + case MT6370_ICHG_500_mA:
> > + case MT6370_ICHG_600_mA:
> > + case MT6370_ICHG_700_mA:
> > + case MT6370_ICHG_800_mA:
> > + *val1 = 2680;
> > + break;
> > + default:
> > + *val1 = 5000;
> > + break;
> > + }
> > +
> > + *val2 = 100;
> > +
> > + return IIO_VAL_FRACTIONAL;
> > + case MT6370_CHAN_VBUSDIV5:
> > + *val1 = 25;
> > + return IIO_VAL_INT;
> > + case MT6370_CHAN_VBUSDIV2:
> > + *val1 = 50;
> > + return IIO_VAL_INT;
> > + case MT6370_CHAN_TS_BAT:
> > + *val1 = 25;
> > + *val2 = 10000;
> > + return IIO_VAL_FRACTIONAL;
> > + case MT6370_CHAN_TEMP_JC:
> > + *val1 = 2000;
> > + return IIO_VAL_FRACTIONAL;
> > + default:
> > + return -EINVAL;
> > + }
> > +}
> > +
> > +static int mt6370_adc_read_offset(struct mt6370_adc_data *priv,
> > + int chan, int *val)
> > +{
> > + *val = -20;
> > +
> > + return IIO_VAL_INT;
> > +}
> > +
> > +static int mt6370_adc_read_raw(struct iio_dev *iio_dev,
> > + const struct iio_chan_spec *chan,
> > + int *val, int *val2, long mask)
> > +{
> > + struct mt6370_adc_data *priv = iio_priv(iio_dev);
> > +
> > + switch (mask) {
> > + case IIO_CHAN_INFO_RAW:
> > + return mt6370_adc_read_channel(priv, chan->channel,
> > + chan->address, val);
> > + case IIO_CHAN_INFO_SCALE:
> > + return mt6370_adc_read_scale(priv, chan->channel, val, val2);
> > + case IIO_CHAN_INFO_OFFSET:
> > + return mt6370_adc_read_offset(priv, chan->channel, val);
> > + default:
> > + return -EINVAL;
> > + }
> > +}
> > +
> > +static const char * const mt6370_channel_labels[MT6370_CHAN_MAX] = {
> > + [MT6370_CHAN_VBUSDIV5] = "vbusdiv5",
> > + [MT6370_CHAN_VBUSDIV2] = "vbusdiv2",
> > + [MT6370_CHAN_VSYS] = "vsys",
> > + [MT6370_CHAN_VBAT] = "vbat",
> > + [MT6370_CHAN_TS_BAT] = "ts_bat",
> > + [MT6370_CHAN_IBUS] = "ibus",
> > + [MT6370_CHAN_IBAT] = "ibat",
> > + [MT6370_CHAN_CHG_VDDP] = "chg_vddp",
> > + [MT6370_CHAN_TEMP_JC] = "temp_jc",
> > +};
> > +
> > +static int mt6370_adc_read_label(struct iio_dev *iio_dev,
> > + struct iio_chan_spec const *chan, char *label)
> > +{
> > + return sysfs_emit(label, "%s\n", mt6370_channel_labels[chan->channel]);
> > +}
> > +
> > +static const struct iio_info mt6370_adc_iio_info = {
> > + .read_raw = mt6370_adc_read_raw,
> > + .read_label = mt6370_adc_read_label,
> > +};
> > +
> > +#define MT6370_ADC_CHAN(_idx, _type, _addr, _extra_info) { \
> > + .type = _type, \
> > + .channel = MT6370_CHAN_##_idx, \
> > + .address = _addr, \
> > + .scan_index = MT6370_CHAN_##_idx, \
> > + .indexed = 1, \
> > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
> > + BIT(IIO_CHAN_INFO_SCALE) | \
> > + _extra_info, \
> > +}
> > +
> > +static const struct iio_chan_spec mt6370_adc_channels[] = {
> > + MT6370_ADC_CHAN(VBUSDIV5, IIO_VOLTAGE, 1, 0),
> > + MT6370_ADC_CHAN(VBUSDIV2, IIO_VOLTAGE, 2, 0),
> > + MT6370_ADC_CHAN(VSYS, IIO_VOLTAGE, 3, 0),
> > + MT6370_ADC_CHAN(VBAT, IIO_VOLTAGE, 4, 0),
> > + MT6370_ADC_CHAN(TS_BAT, IIO_VOLTAGE, 6, 0),
> > + MT6370_ADC_CHAN(IBUS, IIO_CURRENT, 8, 0),
> > + MT6370_ADC_CHAN(IBAT, IIO_CURRENT, 9, 0),
> > + MT6370_ADC_CHAN(CHG_VDDP, IIO_VOLTAGE, 11, 0),
> > + MT6370_ADC_CHAN(TEMP_JC, IIO_TEMP, 12, BIT(IIO_CHAN_INFO_OFFSET)),
> > +};
> > +
> > +static int mt6370_adc_probe(struct platform_device *pdev)
> > +{
> > + struct device *dev = &pdev->dev;
> > + struct mt6370_adc_data *priv;
> > + struct iio_dev *indio_dev;
> > + struct regmap *regmap;
> > + int ret;
> > +
> > + regmap = dev_get_regmap(pdev->dev.parent, NULL);
> > + if (!regmap)
> > + return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");
> > +
> > + indio_dev = devm_iio_device_alloc(dev, sizeof(*priv));
> > + if (!indio_dev)
> > + return -ENOMEM;
> > +
> > + priv = iio_priv(indio_dev);
> > + priv->dev = dev;
> > + priv->regmap = regmap;
> > + mutex_init(&priv->adc_lock);
> > +
> > + ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, 0);
> > + if (ret)
> > + return dev_err_probe(dev, ret, "Failed to reset ADC\n");
> > +
> > + indio_dev->name = "mt6370-adc";
> > + indio_dev->info = &mt6370_adc_iio_info;
> > + indio_dev->modes = INDIO_DIRECT_MODE;
> > + indio_dev->channels = mt6370_adc_channels;
> > + indio_dev->num_channels = ARRAY_SIZE(mt6370_adc_channels);
> > +
> > + return devm_iio_device_register(dev, indio_dev);
> > +}
> > +
> > +static const struct of_device_id mt6370_adc_of_id[] = {
> > + { .compatible = "mediatek,mt6370-adc", },
> > + {}
> > +};
> > +MODULE_DEVICE_TABLE(of, mt6370_adc_of_id);
> > +
> > +static struct platform_driver mt6370_adc_driver = {
> > + .driver = {
> > + .name = "mt6370-adc",
> > + .of_match_table = mt6370_adc_of_id,
> > + },
> > + .probe = mt6370_adc_probe,
> > +};
> > +module_platform_driver(mt6370_adc_driver);
> > +
> > +MODULE_AUTHOR("ChiaEn Wu <[email protected]>");
> > +MODULE_DESCRIPTION("MT6370 ADC Driver");
> > +MODULE_LICENSE("GPL v2");
> > --
> > 2.7.4
> >
>
>