Add a driver for the Qualcomm PMI8998/PM660 Switch-Mode Battery Charger.
This is the second generation SMB charger, and replaces the previous
SMBB hardware found in older PMICs.
This driver provides basic support for initialising the hardware,
configuring the USB input current limit and reporting information about
the state of the charger. Features like type-c dual role support and OTG
switching will be added in future patches.
This patch series depends on my previous series adding support for
the Round Robin ADC which is used for reading the USB voltage and
current, it is currently queued in linux-next, and can be found here:
https://lore.kernel.org/linux-arm-msm/[email protected]/
This has now been merged
Changes since v5:
* Rework IRQ initialisation to support per-IRQ configuration
* Add support waking up the device on cable plug/unplug
* This fixes a bug where when attaching/detaching a cable while
in suspend, userspace wouldn't reflect the new state.
Thanks Joel for catching this.
Changes since v4:
* Fix typo when setting FAST_CHARGE_CURRENT_CFG - the OnePlus 6 now charges
properly!
* Limited charge current to 1A until we better understand the thermal
protection features and how to use them.
* Address Sebastian's comments (thanks for your patience with this)
* re-run clang-format
Changes since v3:
* Drop DTS patches, to be sent in a future series
* Add POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT so that the charger will
be exposed as a cooling device,
see https://lore.kernel.org/linux-pm/[email protected]
* Run clang-format and prevent it from breaking the formatting of the
defines
* Apply Sebastian's suggested fixes
Changes since v2:
* Use devm_delayed_work_autocancel
* Minor driver fixes
* Pick up Krzysztof's R-b on the DT patch
Changes since v1:
* Rename the driver to pmi8998_charger
* Drop unnecessary (and very broken) mutex
* Rework the driver based on feedback to v1
* Fix some minor bugs and improve Automatic Input Current Limit support
Caleb Connolly (2):
power: supply: add Qualcomm PMI8998 SMB2 Charger driver
dt-bindings: power: supply: qcom,pmi8998-charger: add bindings for
smb2 driver
.../power/supply/qcom,pmi8998-charger.yaml | 82 ++
drivers/power/supply/Kconfig | 16 +
drivers/power/supply/Makefile | 1 +
drivers/power/supply/qcom_pmi8998_charger.c | 1090 +++++++++++++++++
4 files changed, 1189 insertions(+)
create mode 100644 Documentation/devicetree/bindings/power/supply/qcom,pmi8998-charger.yaml
create mode 100644 drivers/power/supply/qcom_pmi8998_charger.c
--
2.38.0
Add devicetree bindings for the Qualcomm PMI8998/PM660 SMB2 charger
driver.
Signed-off-by: Caleb Connolly <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
---
.../power/supply/qcom,pmi8998-charger.yaml | 82 +++++++++++++++++++
1 file changed, 82 insertions(+)
create mode 100644 Documentation/devicetree/bindings/power/supply/qcom,pmi8998-charger.yaml
diff --git a/Documentation/devicetree/bindings/power/supply/qcom,pmi8998-charger.yaml b/Documentation/devicetree/bindings/power/supply/qcom,pmi8998-charger.yaml
new file mode 100644
index 000000000000..277c47e048b6
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/supply/qcom,pmi8998-charger.yaml
@@ -0,0 +1,82 @@
+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/power/supply/qcom,pmi8998-charger.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm PMI8998/PM660 Switch-Mode Battery Charger "2"
+
+maintainers:
+ - Caleb Connolly <[email protected]>
+
+properties:
+ compatible:
+ enum:
+ - qcom,pmi8998-charger
+ - qcom,pm660-charger
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 4
+
+ interrupt-names:
+ items:
+ - const: usb-plugin
+ - const: bat-ov
+ - const: wdog-bark
+ - const: usbin-icl-change
+
+ io-channels:
+ items:
+ - description: USB in current in uA
+ - description: USB in voltage in uV
+
+ io-channel-names:
+ items:
+ - const: usbin_i
+ - const: usbin_v
+
+ monitored-battery:
+ description: phandle to the simple-battery node
+ $ref: /schemas/types.yaml#/definitions/phandle
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - interrupt-names
+ - io-channels
+ - io-channel-names
+ - monitored-battery
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ pmic {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ #interrupt-cells = <4>;
+
+ charger@1000 {
+ compatible = "qcom,pmi8998-charger";
+ reg = <0x1000>;
+
+ interrupts = <0x2 0x12 0x2 IRQ_TYPE_EDGE_BOTH>,
+ <0x2 0x13 0x4 IRQ_TYPE_EDGE_BOTH>,
+ <0x2 0x13 0x6 IRQ_TYPE_EDGE_RISING>,
+ <0x2 0x16 0x1 IRQ_TYPE_EDGE_RISING>;
+ interrupt-names = "usb-plugin", "bat-ov", "wdog-bark", "usbin-icl-change";
+
+ io-channels = <&pmi8998_rradc 3>,
+ <&pmi8998_rradc 4>;
+ io-channel-names = "usbin_i",
+ "usbin_v";
+
+ monitored-battery = <&battery>;
+ };
+ };
--
2.38.0
Add a driver for the SMB2 charger block found in the Qualcomm PMI8998
and PM660.
This driver adds initial support for detecting USB cables and managing
basic battery charging.
Signed-off-by: Caleb Connolly <[email protected]>
---
drivers/power/supply/Kconfig | 16 +
drivers/power/supply/Makefile | 1 +
drivers/power/supply/qcom_pmi8998_charger.c | 1082 +++++++++++++++++++
3 files changed, 1099 insertions(+)
create mode 100644 drivers/power/supply/qcom_pmi8998_charger.c
diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 1aa8323ad9f6..34f7d7232683 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -897,4 +897,20 @@ config BATTERY_UG3105
device is off or suspended, the functionality of this driver is
limited to reporting capacity only.
+config CHARGER_QCOM_SMB2
+ tristate "Qualcomm PMI8998 PMIC charger driver"
+ depends on MFD_SPMI_PMIC
+ depends on IIO
+ select QCOM_SPMI_RRADC
+ help
+ Driver for the "SMB2" charger block found on Qualcomm PMI8998
+ and PM660 PMICs.
+
+ The charger features automatic power source detection via BC1.2,
+ automatic input current limiting and reports the realtime voltage
+ and current via the Round Robin ADC.
+
+ Say Y or M here to enable reporting the charger status and rate on
+ supported platforms such as Snapdragon 845 and 835 based phones.
+
endif # POWER_SUPPLY
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index 7f02f36aea55..a6ca8662465a 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_QCOM_SMB2) += qcom_pmi8998_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/qcom_pmi8998_charger.c b/drivers/power/supply/qcom_pmi8998_charger.c
new file mode 100644
index 000000000000..7e127198ea44
--- /dev/null
+++ b/drivers/power/supply/qcom_pmi8998_charger.c
@@ -0,0 +1,1082 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2016-2019 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2021, Linaro Ltd.
+ * Author: Caleb Connolly <[email protected]>
+ *
+ * This driver is for the switch-mode battery charger and boost
+ * hardware found in pmi8998 and related PMICs.
+ */
+
+#include <linux/bits.h>
+#include <linux/devm-helpers.h>
+#include <linux/iio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/minmax.h>
+#include <linux/of_irq.h>
+#include <linux/module.h>
+#include <linux/debugfs.h>
+
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+#include <linux/workqueue.h>
+
+// clang-format off
+#define BATTERY_CHARGER_STATUS_1 0x06
+#define BVR_INITIAL_RAMP_BIT BIT(7)
+#define CC_SOFT_TERMINATE_BIT BIT(6)
+#define STEP_CHARGING_STATUS_SHIFT 3
+#define STEP_CHARGING_STATUS_MASK GENMASK(5, 3)
+#define BATTERY_CHARGER_STATUS_MASK GENMASK(2, 0)
+
+#define BATTERY_CHARGER_STATUS_2 0x07
+#define INPUT_CURRENT_LIMITED_BIT BIT(7)
+#define CHARGER_ERROR_STATUS_SFT_EXPIRE_BIT BIT(6)
+#define CHARGER_ERROR_STATUS_BAT_OV_BIT BIT(5)
+#define CHARGER_ERROR_STATUS_BAT_TERM_MISSING_BIT BIT(4)
+#define BAT_TEMP_STATUS_MASK GENMASK(3, 0)
+#define BAT_TEMP_STATUS_SOFT_LIMIT_MASK GENMASK(3, 2)
+#define BAT_TEMP_STATUS_HOT_SOFT_LIMIT_BIT BIT(3)
+#define BAT_TEMP_STATUS_COLD_SOFT_LIMIT_BIT BIT(2)
+#define BAT_TEMP_STATUS_TOO_HOT_BIT BIT(1)
+#define BAT_TEMP_STATUS_TOO_COLD_BIT BIT(0)
+
+#define BATTERY_CHARGER_STATUS_4 0x0A
+#define CHARGE_CURRENT_POST_JEITA_MASK GENMASK(7, 0)
+
+#define BATTERY_CHARGER_STATUS_7 0x0D
+#define ENABLE_TRICKLE_BIT BIT(7)
+#define ENABLE_PRE_CHARGING_BIT BIT(6)
+#define ENABLE_FAST_CHARGING_BIT BIT(5)
+#define ENABLE_FULLON_MODE_BIT BIT(4)
+#define TOO_COLD_ADC_BIT BIT(3)
+#define TOO_HOT_ADC_BIT BIT(2)
+#define HOT_SL_ADC_BIT BIT(1)
+#define COLD_SL_ADC_BIT BIT(0)
+
+#define CHARGING_ENABLE_CMD 0x42
+#define CHARGING_ENABLE_CMD_BIT BIT(0)
+
+#define CHGR_CFG2 0x51
+#define CHG_EN_SRC_BIT BIT(7)
+#define CHG_EN_POLARITY_BIT BIT(6)
+#define PRETOFAST_TRANSITION_CFG_BIT BIT(5)
+#define BAT_OV_ECC_BIT BIT(4)
+#define I_TERM_BIT BIT(3)
+#define AUTO_RECHG_BIT BIT(2)
+#define EN_ANALOG_DROP_IN_VBATT_BIT BIT(1)
+#define CHARGER_INHIBIT_BIT BIT(0)
+
+#define PRE_CHARGE_CURRENT_CFG 0x60
+#define PRE_CHARGE_CURRENT_SETTING_MASK GENMASK(5, 0)
+
+#define FAST_CHARGE_CURRENT_CFG 0x61
+#define FAST_CHARGE_CURRENT_SETTING_MASK GENMASK(7, 0)
+
+#define FLOAT_VOLTAGE_CFG 0x70
+#define FLOAT_VOLTAGE_SETTING_MASK GENMASK(7, 0)
+
+#define FG_UPDATE_CFG_2_SEL 0x7D
+#define SOC_LT_OTG_THRESH_SEL_BIT BIT(3)
+#define SOC_LT_CHG_RECHARGE_THRESH_SEL_BIT BIT(2)
+#define VBT_LT_CHG_RECHARGE_THRESH_SEL_BIT BIT(1)
+#define IBT_LT_CHG_TERM_THRESH_SEL_BIT BIT(0)
+
+#define JEITA_EN_CFG 0x90
+#define JEITA_EN_HARDLIMIT_BIT BIT(4)
+#define JEITA_EN_HOT_SL_FCV_BIT BIT(3)
+#define JEITA_EN_COLD_SL_FCV_BIT BIT(2)
+#define JEITA_EN_HOT_SL_CCC_BIT BIT(1)
+#define JEITA_EN_COLD_SL_CCC_BIT BIT(0)
+
+#define INT_RT_STS 0x310
+#define TYPE_C_CHANGE_RT_STS_BIT BIT(7)
+#define USBIN_ICL_CHANGE_RT_STS_BIT BIT(6)
+#define USBIN_SOURCE_CHANGE_RT_STS_BIT BIT(5)
+#define USBIN_PLUGIN_RT_STS_BIT BIT(4)
+#define USBIN_OV_RT_STS_BIT BIT(3)
+#define USBIN_UV_RT_STS_BIT BIT(2)
+#define USBIN_LT_3P6V_RT_STS_BIT BIT(1)
+#define USBIN_COLLAPSE_RT_STS_BIT BIT(0)
+
+#define OTG_CFG 0x153
+#define OTG_RESERVED_MASK GENMASK(7, 6)
+#define DIS_OTG_ON_TLIM_BIT BIT(5)
+#define QUICKSTART_OTG_FASTROLESWAP_BIT BIT(4)
+#define INCREASE_DFP_TIME_BIT BIT(3)
+#define ENABLE_OTG_IN_DEBUG_MODE_BIT BIT(2)
+#define OTG_EN_SRC_CFG_BIT BIT(1)
+#define CONCURRENT_MODE_CFG_BIT BIT(0)
+
+#define OTG_ENG_OTG_CFG 0x1C0
+#define ENG_BUCKBOOST_HALT1_8_MODE_BIT BIT(0)
+
+#define APSD_STATUS 0x307
+#define APSD_STATUS_7_BIT BIT(7)
+#define HVDCP_CHECK_TIMEOUT_BIT BIT(6)
+#define SLOW_PLUGIN_TIMEOUT_BIT BIT(5)
+#define ENUMERATION_DONE_BIT BIT(4)
+#define VADP_CHANGE_DONE_AFTER_AUTH_BIT BIT(3)
+#define QC_AUTH_DONE_STATUS_BIT BIT(2)
+#define QC_CHARGER_BIT BIT(1)
+#define APSD_DTC_STATUS_DONE_BIT BIT(0)
+
+#define APSD_RESULT_STATUS 0x308
+#define ICL_OVERRIDE_LATCH_BIT BIT(7)
+#define APSD_RESULT_STATUS_MASK GENMASK(6, 0)
+#define QC_3P0_BIT BIT(6)
+#define QC_2P0_BIT BIT(5)
+#define FLOAT_CHARGER_BIT BIT(4)
+#define DCP_CHARGER_BIT BIT(3)
+#define CDP_CHARGER_BIT BIT(2)
+#define OCP_CHARGER_BIT BIT(1)
+#define SDP_CHARGER_BIT BIT(0)
+
+#define TYPE_C_STATUS_1 0x30B
+#define UFP_TYPEC_MASK GENMASK(7, 5)
+#define UFP_TYPEC_RDSTD_BIT BIT(7)
+#define UFP_TYPEC_RD1P5_BIT BIT(6)
+#define UFP_TYPEC_RD3P0_BIT BIT(5)
+#define UFP_TYPEC_FMB_255K_BIT BIT(4)
+#define UFP_TYPEC_FMB_301K_BIT BIT(3)
+#define UFP_TYPEC_FMB_523K_BIT BIT(2)
+#define UFP_TYPEC_FMB_619K_BIT BIT(1)
+#define UFP_TYPEC_OPEN_OPEN_BIT BIT(0)
+
+#define TYPE_C_STATUS_2 0x30C
+#define DFP_RA_OPEN_BIT BIT(7)
+#define TIMER_STAGE_BIT BIT(6)
+#define EXIT_UFP_MODE_BIT BIT(5)
+#define EXIT_DFP_MODE_BIT BIT(4)
+#define DFP_TYPEC_MASK GENMASK(3, 0)
+#define DFP_RD_OPEN_BIT BIT(3)
+#define DFP_RD_RA_VCONN_BIT BIT(2)
+#define DFP_RD_RD_BIT BIT(1)
+#define DFP_RA_RA_BIT BIT(0)
+
+#define TYPE_C_STATUS_3 0x30D
+#define ENABLE_BANDGAP_BIT BIT(7)
+#define U_USB_GND_NOVBUS_BIT BIT(6)
+#define U_USB_FLOAT_NOVBUS_BIT BIT(5)
+#define U_USB_GND_BIT BIT(4)
+#define U_USB_FMB1_BIT BIT(3)
+#define U_USB_FLOAT1_BIT BIT(2)
+#define U_USB_FMB2_BIT BIT(1)
+#define U_USB_FLOAT2_BIT BIT(0)
+
+#define TYPE_C_STATUS_4 0x30E
+#define UFP_DFP_MODE_STATUS_BIT BIT(7)
+#define TYPEC_VBUS_STATUS_BIT BIT(6)
+#define TYPEC_VBUS_ERROR_STATUS_BIT BIT(5)
+#define TYPEC_DEBOUNCE_DONE_STATUS_BIT BIT(4)
+#define TYPEC_UFP_AUDIO_ADAPT_STATUS_BIT BIT(3)
+#define TYPEC_VCONN_OVERCURR_STATUS_BIT BIT(2)
+#define CC_ORIENTATION_BIT BIT(1)
+#define CC_ATTACHED_BIT BIT(0)
+
+#define TYPE_C_STATUS_5 0x30F
+#define TRY_SOURCE_FAILED_BIT BIT(6)
+#define TRY_SINK_FAILED_BIT BIT(5)
+#define TIMER_STAGE_2_BIT BIT(4)
+#define TYPEC_LEGACY_CABLE_STATUS_BIT BIT(3)
+#define TYPEC_NONCOMP_LEGACY_CABLE_STATUS_BIT BIT(2)
+#define TYPEC_TRYSOURCE_DETECT_STATUS_BIT BIT(1)
+#define TYPEC_TRYSINK_DETECT_STATUS_BIT BIT(0)
+
+#define CMD_APSD 0x341
+#define ICL_OVERRIDE_BIT BIT(1)
+#define APSD_RERUN_BIT BIT(0)
+
+#define TYPE_C_CFG 0x358
+#define APSD_START_ON_CC_BIT BIT(7)
+#define WAIT_FOR_APSD_BIT BIT(6)
+#define FACTORY_MODE_DETECTION_EN_BIT BIT(5)
+#define FACTORY_MODE_ICL_3A_4A_BIT BIT(4)
+#define FACTORY_MODE_DIS_CHGING_CFG_BIT BIT(3)
+#define SUSPEND_NON_COMPLIANT_CFG_BIT BIT(2)
+#define VCONN_OC_CFG_BIT BIT(1)
+#define TYPE_C_OR_U_USB_BIT BIT(0)
+
+#define TYPE_C_CFG_2 0x359
+#define TYPE_C_DFP_CURRSRC_MODE_BIT BIT(7)
+#define DFP_CC_1P4V_OR_1P6V_BIT BIT(6)
+#define VCONN_SOFTSTART_CFG_MASK GENMASK(5, 4)
+#define EN_TRY_SOURCE_MODE_BIT BIT(3)
+#define USB_FACTORY_MODE_ENABLE_BIT BIT(2)
+#define TYPE_C_UFP_MODE_BIT BIT(1)
+#define EN_80UA_180UA_CUR_SOURCE_BIT BIT(0)
+
+#define TYPE_C_CFG_3 0x35A
+#define TVBUS_DEBOUNCE_BIT BIT(7)
+#define TYPEC_LEGACY_CABLE_INT_EN_BIT BIT(6)
+#define TYPEC_NONCOMPLIANT_LEGACY_CABLE_INT_EN_B BIT(5)
+#define TYPEC_TRYSOURCE_DETECT_INT_EN_BIT BIT(4)
+#define TYPEC_TRYSINK_DETECT_INT_EN_BIT BIT(3)
+#define EN_TRYSINK_MODE_BIT BIT(2)
+#define EN_LEGACY_CABLE_DETECTION_BIT BIT(1)
+#define ALLOW_PD_DRING_UFP_TCCDB_BIT BIT(0)
+
+#define USBIN_OPTIONS_1_CFG 0x362
+#define CABLE_R_SEL_BIT BIT(7)
+#define HVDCP_AUTH_ALG_EN_CFG_BIT BIT(6)
+#define HVDCP_AUTONOMOUS_MODE_EN_CFG_BIT BIT(5)
+#define INPUT_PRIORITY_BIT BIT(4)
+#define AUTO_SRC_DETECT_BIT BIT(3)
+#define HVDCP_EN_BIT BIT(2)
+#define VADP_INCREMENT_VOLTAGE_LIMIT_BIT BIT(1)
+#define VADP_TAPER_TIMER_EN_BIT BIT(0)
+
+#define USBIN_OPTIONS_2_CFG 0x363
+#define WIPWR_RST_EUD_CFG_BIT BIT(7)
+#define SWITCHER_START_CFG_BIT BIT(6)
+#define DCD_TIMEOUT_SEL_BIT BIT(5)
+#define OCD_CURRENT_SEL_BIT BIT(4)
+#define SLOW_PLUGIN_TIMER_EN_CFG_BIT BIT(3)
+#define FLOAT_OPTIONS_MASK GENMASK(2, 0)
+#define FLOAT_DIS_CHGING_CFG_BIT BIT(2)
+#define SUSPEND_FLOAT_CFG_BIT BIT(1)
+#define FORCE_FLOAT_SDP_CFG_BIT BIT(0)
+
+#define TAPER_TIMER_SEL_CFG 0x364
+#define TYPEC_SPARE_CFG_BIT BIT(7)
+#define TYPEC_DRP_DFP_TIME_CFG_BIT BIT(5)
+#define TAPER_TIMER_SEL_MASK GENMASK(1, 0)
+
+#define USBIN_LOAD_CFG 0x365
+#define USBIN_OV_CH_LOAD_OPTION_BIT BIT(7)
+#define ICL_OVERRIDE_AFTER_APSD_BIT BIT(4)
+
+#define USBIN_ICL_OPTIONS 0x366
+#define CFG_USB3P0_SEL_BIT BIT(2)
+#define USB51_MODE_BIT BIT(1)
+#define USBIN_MODE_CHG_BIT BIT(0)
+
+#define TYPE_C_INTRPT_ENB_SOFTWARE_CTRL 0x368
+#define EXIT_SNK_BASED_ON_CC_BIT BIT(7)
+#define VCONN_EN_ORIENTATION_BIT BIT(6)
+#define TYPEC_VCONN_OVERCURR_INT_EN_BIT BIT(5)
+#define VCONN_EN_SRC_BIT BIT(4)
+#define VCONN_EN_VALUE_BIT BIT(3)
+#define TYPEC_POWER_ROLE_CMD_MASK GENMASK(2, 0)
+#define UFP_EN_CMD_BIT BIT(2)
+#define DFP_EN_CMD_BIT BIT(1)
+#define TYPEC_DISABLE_CMD_BIT BIT(0)
+
+#define USBIN_CURRENT_LIMIT_CFG 0x370
+#define USBIN_CURRENT_LIMIT_MASK GENMASK(7, 0)
+
+#define USBIN_AICL_OPTIONS_CFG 0x380
+#define SUSPEND_ON_COLLAPSE_USBIN_BIT BIT(7)
+#define USBIN_AICL_HDC_EN_BIT BIT(6)
+#define USBIN_AICL_START_AT_MAX_BIT BIT(5)
+#define USBIN_AICL_RERUN_EN_BIT BIT(4)
+#define USBIN_AICL_ADC_EN_BIT BIT(3)
+#define USBIN_AICL_EN_BIT BIT(2)
+#define USBIN_HV_COLLAPSE_RESPONSE_BIT BIT(1)
+#define USBIN_LV_COLLAPSE_RESPONSE_BIT BIT(0)
+
+#define USBIN_5V_AICL_THRESHOLD_CFG 0x381
+#define USBIN_5V_AICL_THRESHOLD_CFG_MASK GENMASK(2, 0)
+
+#define USBIN_CONT_AICL_THRESHOLD_CFG 0x384
+#define USBIN_CONT_AICL_THRESHOLD_CFG_MASK GENMASK(5, 0)
+
+#define DC_ENG_SSUPPLY_CFG2 0x4C1
+#define ENG_SSUPPLY_IVREF_OTG_SS_MASK GENMASK(2, 0)
+#define OTG_SS_SLOW 0x3
+
+#define DCIN_AICL_REF_SEL_CFG 0x481
+#define DCIN_CONT_AICL_THRESHOLD_CFG_MASK GENMASK(5, 0)
+
+#define WI_PWR_OPTIONS 0x495
+#define CHG_OK_BIT BIT(7)
+#define WIPWR_UVLO_IRQ_OPT_BIT BIT(6)
+#define BUCK_HOLDOFF_ENABLE_BIT BIT(5)
+#define CHG_OK_HW_SW_SELECT_BIT BIT(4)
+#define WIPWR_RST_ENABLE_BIT BIT(3)
+#define DCIN_WIPWR_IRQ_SELECT_BIT BIT(2)
+#define AICL_SWITCH_ENABLE_BIT BIT(1)
+#define ZIN_ICL_ENABLE_BIT BIT(0)
+
+#define ICL_STATUS 0x607
+#define INPUT_CURRENT_LIMIT_MASK GENMASK(7, 0)
+
+#define POWER_PATH_STATUS 0x60B
+#define P_PATH_INPUT_SS_DONE_BIT BIT(7)
+#define P_PATH_USBIN_SUSPEND_STS_BIT BIT(6)
+#define P_PATH_DCIN_SUSPEND_STS_BIT BIT(5)
+#define P_PATH_USE_USBIN_BIT BIT(4)
+#define P_PATH_USE_DCIN_BIT BIT(3)
+#define P_PATH_POWER_PATH_MASK GENMASK(2, 1)
+#define P_PATH_VALID_INPUT_POWER_SOURCE_STS_BIT BIT(0)
+
+#define BARK_BITE_WDOG_PET 0x643
+#define BARK_BITE_WDOG_PET_BIT BIT(0)
+
+#define WD_CFG 0x651
+#define WATCHDOG_TRIGGER_AFP_EN_BIT BIT(7)
+#define BARK_WDOG_INT_EN_BIT BIT(6)
+#define BITE_WDOG_INT_EN_BIT BIT(5)
+#define SFT_AFTER_WDOG_IRQ_MASK GENMASK(4, 3)
+#define WDOG_IRQ_SFT_BIT BIT(2)
+#define WDOG_TIMER_EN_ON_PLUGIN_BIT BIT(1)
+#define WDOG_TIMER_EN_BIT BIT(0)
+
+#define SNARL_BARK_BITE_WD_CFG 0x653
+#define BITE_WDOG_DISABLE_CHARGING_CFG_BIT BIT(7)
+#define SNARL_WDOG_TIMEOUT_MASK GENMASK(6, 4)
+#define BARK_WDOG_TIMEOUT_MASK GENMASK(3, 2)
+#define BITE_WDOG_TIMEOUT_MASK GENMASK(1, 0)
+
+#define AICL_RERUN_TIME_CFG 0x661
+#define AICL_RERUN_TIME_MASK GENMASK(1, 0)
+
+#define STAT_CFG 0x690
+#define STAT_SW_OVERRIDE_VALUE_BIT BIT(7)
+#define STAT_SW_OVERRIDE_CFG_BIT BIT(6)
+#define STAT_PARALLEL_OFF_DG_CFG_MASK GENMASK(5, 4)
+#define STAT_POLARITY_CFG_BIT BIT(3)
+#define STAT_PARALLEL_CFG_BIT BIT(2)
+#define STAT_FUNCTION_CFG_BIT BIT(1)
+#define STAT_IRQ_PULSING_EN_BIT BIT(0)
+
+#define USBIN_CURRENT_25MA 25000
+#define USBIN_CURRENT_100MA 100000
+#define USBIN_CURRENT_150MA 150000
+#define USBIN_CURRENT_500MA 500000
+#define USBIN_CURRENT_900MA 900000
+#define SDP_CURRENT_UA 500000
+#define CDP_CURRENT_UA 1500000
+#define DCP_CURRENT_UA 1500000
+#define CURRENT_MAX_UA DCP_CURRENT_UA
+// clang-format on
+
+enum charger_status {
+ TRICKLE_CHARGE = 0,
+ PRE_CHARGE,
+ FAST_CHARGE,
+ FULLON_CHARGE,
+ TAPER_CHARGE,
+ TERMINATE_CHARGE,
+ INHIBIT_CHARGE,
+ DISABLE_CHARGE,
+};
+
+struct smb2_register {
+ u16 addr;
+ u8 mask;
+ u8 val;
+};
+
+/**
+ * struct smb2_chip - smb2 chip structure
+ * @dev: Device reference for power_supply
+ * @name: The platform device name
+ * @base: Base address for smb2 registers
+ * @regmap: Register map
+ * @batt_info: Battery data from DT
+ * @status_change_work: Worker to handle plug/unplug events
+ * @cable_irq: USB plugin IRQ
+ * @wakeup_enabled: If the cable IRQ will cause a wakeup
+ * @usb_in_i_chan: USB_IN current measurement channel
+ * @usb_in_v_chan: USB_IN voltage measurement channel
+ * @chg_psy: Charger power supply instance
+ * @default_curr_limit: The default current limit from the APSD, used
+ * for CHARGE_CONTROL_LIMIT_MAX
+ */
+struct smb2_chip {
+ struct device *dev;
+ const char *name;
+ unsigned int base;
+ struct regmap *regmap;
+ struct power_supply_battery_info *batt_info;
+
+ struct delayed_work status_change_work;
+ int cable_irq;
+ bool wakeup_enabled;
+
+ struct iio_channel *usb_in_i_chan;
+ struct iio_channel *usb_in_v_chan;
+
+ struct power_supply *chg_psy;
+ long default_curr_limit;
+};
+
+static enum power_supply_property smb2_properties[] = {
+ POWER_SUPPLY_PROP_MANUFACTURER,
+ POWER_SUPPLY_PROP_MODEL_NAME,
+ POWER_SUPPLY_PROP_CURRENT_MAX,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_USB_TYPE,
+ POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT,
+ POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX,
+};
+
+static enum power_supply_usb_type smb2_usb_types[] = {
+ POWER_SUPPLY_USB_TYPE_UNKNOWN,
+ POWER_SUPPLY_USB_TYPE_SDP,
+ POWER_SUPPLY_USB_TYPE_DCP,
+ POWER_SUPPLY_USB_TYPE_CDP,
+};
+
+static int smb2_get_prop_usb_online(struct smb2_chip *chip, int *val)
+{
+ unsigned int stat;
+ int rc;
+
+ rc = regmap_read(chip->regmap, chip->base + POWER_PATH_STATUS, &stat);
+ if (rc < 0) {
+ dev_err(chip->dev, "Couldn't read POWER_PATH_STATUS! ret=%d\n",
+ rc);
+ return rc;
+ }
+
+ *val = (stat & P_PATH_USE_USBIN_BIT) &&
+ (stat & P_PATH_VALID_INPUT_POWER_SOURCE_STS_BIT);
+ return 0;
+}
+
+/*
+ * Qualcomm "automatic power source detection" aka APSD
+ * tells us what type of charger we're connected to.
+ */
+static int smb2_apsd_get_charger_type(struct smb2_chip *chip, int *val)
+{
+ int rc;
+ unsigned int apsd_stat, stat;
+ int usb_online;
+
+ rc = smb2_get_prop_usb_online(chip, &usb_online);
+ if (rc < 0 || !usb_online) {
+ *val = POWER_SUPPLY_USB_TYPE_UNKNOWN;
+ return 0;
+ }
+
+ rc = regmap_read(chip->regmap, chip->base + APSD_STATUS, &apsd_stat);
+ if (rc < 0) {
+ dev_err(chip->dev, "Failed to read apsd status, rc = %d", rc);
+ return rc;
+ }
+ if (!(apsd_stat & APSD_DTC_STATUS_DONE_BIT)) {
+ dev_dbg(chip->dev, "Apsd not ready");
+ return -EAGAIN;
+ }
+
+ rc = regmap_read(chip->regmap, chip->base + APSD_RESULT_STATUS, &stat);
+ if (rc < 0) {
+ dev_err(chip->dev, "Failed to read apsd result, rc = %d", rc);
+ return rc;
+ }
+
+ stat &= APSD_RESULT_STATUS_MASK;
+
+ if (stat & CDP_CHARGER_BIT)
+ *val = POWER_SUPPLY_USB_TYPE_CDP;
+ else if (stat & (DCP_CHARGER_BIT | OCP_CHARGER_BIT | FLOAT_CHARGER_BIT))
+ *val = POWER_SUPPLY_USB_TYPE_DCP;
+ else /* SDP_CHARGER_BIT (or others) */
+ *val = POWER_SUPPLY_USB_TYPE_SDP;
+
+ return 0;
+}
+
+static int smb2_get_prop_status(struct smb2_chip *chip, int *val)
+{
+ int usb_online_val;
+ unsigned char stat[2];
+ int rc;
+
+ rc = smb2_get_prop_usb_online(chip, &usb_online_val);
+ if (rc < 0) {
+ dev_err(chip->dev, "Couldn't get usb online property rc = %d\n",
+ rc);
+ return rc;
+ }
+
+ if (!usb_online_val) {
+ *val = POWER_SUPPLY_STATUS_DISCHARGING;
+ return rc;
+ }
+
+ rc = regmap_bulk_read(chip->regmap,
+ chip->base + BATTERY_CHARGER_STATUS_1, &stat, 2);
+ if (rc < 0) {
+ dev_err(chip->dev, "Failed to read charging status ret=%d\n",
+ rc);
+ return rc;
+ }
+
+ if (stat[1] & CHARGER_ERROR_STATUS_BAT_OV_BIT) {
+ *val = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ return 0;
+ }
+
+ stat[0] = stat[0] & BATTERY_CHARGER_STATUS_MASK;
+
+ switch (stat[0]) {
+ case TRICKLE_CHARGE:
+ case PRE_CHARGE:
+ case FAST_CHARGE:
+ case FULLON_CHARGE:
+ case TAPER_CHARGE:
+ *val = POWER_SUPPLY_STATUS_CHARGING;
+ return rc;
+ case DISABLE_CHARGE:
+ *val = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ return rc;
+ case TERMINATE_CHARGE:
+ *val = POWER_SUPPLY_STATUS_FULL;
+ return rc;
+ case INHIBIT_CHARGE:
+ default:
+ *val = POWER_SUPPLY_STATUS_UNKNOWN;
+ return rc;
+ }
+}
+
+static inline int smb2_get_current_limit(struct smb2_chip *chip,
+ unsigned int *val)
+{
+ int rc = regmap_read(chip->regmap, chip->base + ICL_STATUS, val);
+
+ if (rc >= 0)
+ *val *= 25000;
+ return rc;
+}
+
+static int smb2_set_current_limit(struct smb2_chip *chip, unsigned int val)
+{
+ unsigned char val_raw;
+
+ if (val > 4800000) {
+ dev_err(chip->dev,
+ "Can't set current limit higher than 4800000uA");
+ return -EINVAL;
+ }
+ val_raw = val / 25000;
+
+ return regmap_write(chip->regmap, chip->base + USBIN_CURRENT_LIMIT_CFG,
+ val_raw);
+}
+
+static void smb2_status_change_work(struct work_struct *work)
+{
+ struct smb2_chip *chip =
+ container_of(work, struct smb2_chip, status_change_work.work);
+ unsigned int charger_type, current_ua;
+ int usb_online, count, rc;
+
+ smb2_get_prop_usb_online(chip, &usb_online);
+ if (usb_online == 0) {
+ chip->default_curr_limit = 0;
+ return;
+ }
+
+ for (count = 0; count < 3; count++) {
+ dev_dbg(chip->dev, "get charger type retry %d\n", count);
+ rc = smb2_apsd_get_charger_type(chip, &charger_type);
+ if (rc == 0)
+ break;
+ msleep(100);
+ }
+
+ if (rc < 0) {
+ rc = regmap_update_bits(chip->regmap, chip->base + CMD_APSD,
+ APSD_RERUN_BIT, APSD_RERUN_BIT);
+ schedule_delayed_work(&chip->status_change_work,
+ msecs_to_jiffies(1000));
+ dev_dbg(chip->dev, "get charger type failed, rerun apsd\n");
+ return;
+ }
+
+ switch (charger_type) {
+ case POWER_SUPPLY_USB_TYPE_CDP:
+ current_ua = CDP_CURRENT_UA;
+ break;
+ case POWER_SUPPLY_USB_TYPE_DCP:
+ current_ua = DCP_CURRENT_UA;
+ break;
+ case POWER_SUPPLY_USB_TYPE_SDP:
+ default:
+ current_ua = SDP_CURRENT_UA;
+ break;
+ }
+
+ chip->default_curr_limit = current_ua;
+
+ smb2_set_current_limit(chip, current_ua);
+ power_supply_changed(chip->chg_psy);
+}
+
+static int smb2_get_iio_chan(struct smb2_chip *chip, struct iio_channel *chan,
+ int *val)
+{
+ int rc;
+ union power_supply_propval status;
+
+ rc = power_supply_get_property(chip->chg_psy, POWER_SUPPLY_PROP_STATUS,
+ &status);
+ if (rc < 0 || status.intval != POWER_SUPPLY_STATUS_CHARGING) {
+ *val = 0;
+ return 0;
+ }
+
+ if (IS_ERR(chan)) {
+ dev_err(chip->dev, "Failed to chan, err = %li", PTR_ERR(chan));
+ return PTR_ERR(chan);
+ }
+
+ return iio_read_channel_processed(chan, val);
+}
+
+static int smb2_get_prop_health(struct smb2_chip *chip, int *val)
+{
+ int rc;
+ unsigned int stat;
+
+ rc = regmap_read(chip->regmap, chip->base + BATTERY_CHARGER_STATUS_2,
+ &stat);
+ if (rc < 0) {
+ dev_err(chip->dev, "Couldn't read charger status rc=%d\n", rc);
+ return rc;
+ }
+
+ switch (stat) {
+ case CHARGER_ERROR_STATUS_BAT_OV_BIT:
+ *val = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ return 0;
+ case BAT_TEMP_STATUS_TOO_COLD_BIT:
+ *val = POWER_SUPPLY_HEALTH_COLD;
+ return 0;
+ case BAT_TEMP_STATUS_TOO_HOT_BIT:
+ *val = POWER_SUPPLY_HEALTH_OVERHEAT;
+ return 0;
+ case BAT_TEMP_STATUS_COLD_SOFT_LIMIT_BIT:
+ *val = POWER_SUPPLY_HEALTH_COOL;
+ return 0;
+ case BAT_TEMP_STATUS_HOT_SOFT_LIMIT_BIT:
+ *val = POWER_SUPPLY_HEALTH_WARM;
+ return 0;
+ default:
+ *val = POWER_SUPPLY_HEALTH_GOOD;
+ return 0;
+ }
+}
+
+static int smb2_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct smb2_chip *chip = power_supply_get_drvdata(psy);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ val->strval = "Qualcomm";
+ return 0;
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = chip->name;
+ return 0;
+ case POWER_SUPPLY_PROP_CURRENT_MAX:
+ case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
+ return smb2_get_current_limit(chip, &val->intval);
+ case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
+ val->intval = chip->default_curr_limit;
+ return 0;
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ return smb2_get_iio_chan(chip, chip->usb_in_i_chan,
+ &val->intval);
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ return smb2_get_iio_chan(chip, chip->usb_in_v_chan,
+ &val->intval);
+ case POWER_SUPPLY_PROP_ONLINE:
+ return smb2_get_prop_usb_online(chip, &val->intval);
+ case POWER_SUPPLY_PROP_STATUS:
+ return smb2_get_prop_status(chip, &val->intval);
+ case POWER_SUPPLY_PROP_HEALTH:
+ return smb2_get_prop_health(chip, &val->intval);
+ case POWER_SUPPLY_PROP_USB_TYPE:
+ return smb2_apsd_get_charger_type(chip, &val->intval);
+ default:
+ dev_err(chip->dev, "invalid property: %d\n", psp);
+ return -EINVAL;
+ }
+}
+
+static int smb2_set_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ const union power_supply_propval *val)
+{
+ struct smb2_chip *chip = power_supply_get_drvdata(psy);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_CURRENT_MAX:
+ case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
+ return smb2_set_current_limit(chip, val->intval);
+ default:
+ dev_err(chip->dev, "No setter for property: %d\n", psp);
+ return -EINVAL;
+ }
+}
+
+static int smb2_property_is_writable(struct power_supply *psy,
+ enum power_supply_property psp)
+{
+ switch (psp) {
+ case POWER_SUPPLY_PROP_CURRENT_MAX:
+ case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+static irqreturn_t smb2_handle_batt_overvoltage(int irq, void *data)
+{
+ struct smb2_chip *chip = data;
+ unsigned int status;
+
+ regmap_read(chip->regmap, chip->base + BATTERY_CHARGER_STATUS_2,
+ &status);
+
+ if (status & CHARGER_ERROR_STATUS_BAT_OV_BIT) {
+ /* The hardware stops charging automatically */
+ dev_err(chip->dev,
+ "battery overvoltage detected, charging stopped\n");
+ power_supply_changed(chip->chg_psy);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t smb2_handle_usb_plugin(int irq, void *data)
+{
+ struct smb2_chip *chip = data;
+
+ power_supply_changed(chip->chg_psy);
+
+ schedule_delayed_work(&chip->status_change_work,
+ msecs_to_jiffies(1500));
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t smb2_handle_usb_icl_change(int irq, void *data)
+{
+ struct smb2_chip *chip = data;
+
+ power_supply_changed(chip->chg_psy);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t smb2_handle_wdog_bark(int irq, void *data)
+{
+ struct smb2_chip *chip = data;
+ int rc;
+
+ power_supply_changed(chip->chg_psy);
+
+ rc = regmap_write(chip->regmap, BARK_BITE_WDOG_PET,
+ BARK_BITE_WDOG_PET_BIT);
+ if (rc < 0)
+ dev_err(chip->dev, "Couldn't pet the dog rc=%d\n", rc);
+
+ return IRQ_HANDLED;
+}
+
+static const struct power_supply_desc smb2_psy_desc = {
+ .name = "pmi8998_charger",
+ .type = POWER_SUPPLY_TYPE_USB,
+ .usb_types = smb2_usb_types,
+ .num_usb_types = ARRAY_SIZE(smb2_usb_types),
+ .properties = smb2_properties,
+ .num_properties = ARRAY_SIZE(smb2_properties),
+ .get_property = smb2_get_property,
+ .set_property = smb2_set_property,
+ .property_is_writeable = smb2_property_is_writable,
+};
+
+/* Init sequence derived from vendor downstream driver */
+static const struct smb2_register smb2_init_seq[] = {
+ { .addr = AICL_RERUN_TIME_CFG, .mask = AICL_RERUN_TIME_MASK, .val = 0 },
+ /*
+ * By default configure us as an upstream facing port
+ * NOTE: for OTG we should set UFP_EN_CMD_BIT and DFP_EN_CMD_BIT both
+ * to 0
+ */
+ { .addr = TYPE_C_INTRPT_ENB_SOFTWARE_CTRL,
+ .mask = TYPEC_POWER_ROLE_CMD_MASK | VCONN_EN_SRC_BIT |
+ VCONN_EN_VALUE_BIT,
+ .val = VCONN_EN_SRC_BIT },
+ /*
+ * disable Type-C factory mode and stay in Attached.SRC state when VCONN
+ * over-current happens
+ */
+ { .addr = TYPE_C_CFG,
+ .mask = FACTORY_MODE_DETECTION_EN_BIT | VCONN_OC_CFG_BIT,
+ .val = 0 },
+ /* Configure VBUS for software control */
+ { .addr = OTG_CFG, .mask = OTG_EN_SRC_CFG_BIT, .val = 0 },
+ { .addr = FG_UPDATE_CFG_2_SEL,
+ .mask = SOC_LT_CHG_RECHARGE_THRESH_SEL_BIT |
+ VBT_LT_CHG_RECHARGE_THRESH_SEL_BIT,
+ .val = VBT_LT_CHG_RECHARGE_THRESH_SEL_BIT },
+ /* Enable charging */
+ { .addr = USBIN_OPTIONS_1_CFG, .mask = HVDCP_EN_BIT, .val = 0 },
+ { .addr = CHARGING_ENABLE_CMD,
+ .mask = CHARGING_ENABLE_CMD_BIT,
+ .val = CHARGING_ENABLE_CMD_BIT },
+ { .addr = CHGR_CFG2,
+ .mask = CHG_EN_SRC_BIT | CHG_EN_POLARITY_BIT |
+ PRETOFAST_TRANSITION_CFG_BIT | BAT_OV_ECC_BIT | I_TERM_BIT |
+ AUTO_RECHG_BIT | EN_ANALOG_DROP_IN_VBATT_BIT |
+ CHARGER_INHIBIT_BIT,
+ .val = 0 },
+ /*
+ * No clue what this does
+ */
+ { .addr = STAT_CFG,
+ .mask = STAT_SW_OVERRIDE_CFG_BIT,
+ .val = STAT_SW_OVERRIDE_CFG_BIT },
+ /*
+ * Set the default SDP charger type to a 500ma USB 2.0 port
+ */
+ { .addr = USBIN_ICL_OPTIONS,
+ .mask = USB51_MODE_BIT | USBIN_MODE_CHG_BIT,
+ .val = USB51_MODE_BIT },
+ /*
+ * Disable watchdog
+ */
+ { .addr = SNARL_BARK_BITE_WD_CFG, .mask = 0xff, .val = 0 },
+ { .addr = WD_CFG,
+ .mask = WATCHDOG_TRIGGER_AFP_EN_BIT | WDOG_TIMER_EN_ON_PLUGIN_BIT |
+ BARK_WDOG_INT_EN_BIT,
+ .val = 0 },
+ /* These bits aren't documented anywhere */
+ { .addr = USBIN_5V_AICL_THRESHOLD_CFG,
+ .mask = USBIN_5V_AICL_THRESHOLD_CFG_MASK,
+ .val = 0x3 },
+ { .addr = USBIN_CONT_AICL_THRESHOLD_CFG,
+ .mask = USBIN_CONT_AICL_THRESHOLD_CFG_MASK,
+ .val = 0x3 },
+ { .addr = USBIN_LOAD_CFG, .mask = BIT(0) | BIT(1), .val = 0x3 },
+ /* Enable Automatic Input Current Limit, this will slowly ramp up the current
+ * When connected to a wall charger, and automatically stop when it detects
+ * the charger current limit (voltage drop?) or it reaches the programmed limit.
+ */
+ { .addr = USBIN_AICL_OPTIONS_CFG,
+ .mask = USBIN_AICL_START_AT_MAX_BIT | USBIN_AICL_ADC_EN_BIT |
+ USBIN_AICL_EN_BIT | SUSPEND_ON_COLLAPSE_USBIN_BIT |
+ USBIN_HV_COLLAPSE_RESPONSE_BIT |
+ USBIN_LV_COLLAPSE_RESPONSE_BIT,
+ .val = USBIN_HV_COLLAPSE_RESPONSE_BIT |
+ USBIN_LV_COLLAPSE_RESPONSE_BIT | USBIN_AICL_EN_BIT },
+ /*
+ * Set pre charge current to default, the OnePlus 6 bootloader
+ * sets this very conservatively.
+ * NOTE: seems to be reset to zero again anyway after boot
+ */
+ { .addr = PRE_CHARGE_CURRENT_CFG,
+ .mask = PRE_CHARGE_CURRENT_SETTING_MASK,
+ .val = 500000 / 25000 },
+ /*
+ * This overrides all of the current limit options exposed to userspace
+ * and prevents the device from pulling more than 1A. This is done
+ * to avoid potential fire hazard risks.
+ */
+ { .addr = FAST_CHARGE_CURRENT_CFG,
+ .mask = FAST_CHARGE_CURRENT_SETTING_MASK,
+ .val = 1000000 / 25000 },
+};
+
+static int smb2_init_hw(struct smb2_chip *chip)
+{
+ int rc, i;
+
+ for (i = 0; i < ARRAY_SIZE(smb2_init_seq); i++) {
+ dev_dbg(chip->dev, "%d: Writing 0x%02x to 0x%02x\n", i,
+ smb2_init_seq[i].val, smb2_init_seq[i].addr);
+ rc = regmap_update_bits(chip->regmap,
+ chip->base + smb2_init_seq[i].addr,
+ smb2_init_seq[i].mask,
+ smb2_init_seq[i].val);
+ if (rc < 0)
+ return dev_err_probe(
+ chip->dev, rc,
+ "%s: Failed to write 0x%02x to 0x%02x\n",
+ __func__, smb2_init_seq[i].val,
+ smb2_init_seq[i].addr);
+ }
+
+ return 0;
+}
+
+static int smb2_init_irq(struct smb2_chip *chip, int *irq, const char *name,
+ irqreturn_t (*handler)(int irq, void *data))
+{
+ int rc;
+
+ *irq = of_irq_get_byname(chip->dev->of_node, name);
+ if (*irq < 0)
+ return dev_err_probe(chip->dev, *irq,
+ "Couldn't get irq %s byname\n", name);
+
+ rc = devm_request_threaded_irq(chip->dev, *irq, NULL, handler,
+ IRQF_ONESHOT, name, chip);
+ if (rc < 0)
+ return dev_err_probe(chip->dev, rc, "Couldn't request irq %s\n",
+ name);
+
+ return 0;
+}
+
+static int smb2_probe(struct platform_device *pdev)
+{
+ struct power_supply_config supply_config = {};
+ struct smb2_chip *chip;
+ int rc, irq;
+
+ chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->dev = &pdev->dev;
+ chip->name = pdev->name;
+
+ chip->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!chip->regmap) {
+ return dev_err_probe(chip->dev, -ENODEV,
+ "failed to locate the regmap\n");
+ }
+
+ rc = device_property_read_u32(chip->dev, "reg", &chip->base);
+ if (rc < 0) {
+ return dev_err_probe(chip->dev, rc,
+ "Couldn't read base address\n");
+ }
+
+ chip->usb_in_v_chan = devm_iio_channel_get(chip->dev, "usbin_v");
+ if (IS_ERR(chip->usb_in_v_chan))
+ return dev_err_probe(
+ chip->dev, PTR_ERR(chip->usb_in_v_chan),
+ "Couldn't get usbin_v IIO channel from RRADC\n");
+
+ chip->usb_in_i_chan = devm_iio_channel_get(chip->dev, "usbin_i");
+ if (IS_ERR(chip->usb_in_i_chan)) {
+ return dev_err_probe(
+ chip->dev, PTR_ERR(chip->usb_in_i_chan),
+ "Couldn't get usbin_i IIO channel from RRADC\n");
+ }
+
+ rc = smb2_init_hw(chip);
+ if (rc < 0)
+ return rc;
+
+ supply_config.drv_data = chip;
+ supply_config.of_node = pdev->dev.of_node;
+
+ chip->chg_psy = devm_power_supply_register(chip->dev, &smb2_psy_desc,
+ &supply_config);
+ if (IS_ERR(chip->chg_psy))
+ return dev_err_probe(chip->dev, PTR_ERR(chip->chg_psy),
+ "failed to register power supply\n");
+
+ rc = power_supply_get_battery_info(chip->chg_psy, &chip->batt_info);
+ if (rc)
+ return dev_err_probe(chip->dev, rc,
+ "Failed to get battery info\n");
+
+ rc = devm_delayed_work_autocancel(chip->dev, &chip->status_change_work,
+ smb2_status_change_work);
+ if (rc)
+ return dev_err_probe(
+ chip->dev, rc,
+ "Failed to initialise status change work\n");
+
+ rc = (chip->batt_info->voltage_max_design_uv - 3487500) / 7500 + 1;
+ rc = regmap_update_bits(chip->regmap, chip->base + FLOAT_VOLTAGE_CFG,
+ FLOAT_VOLTAGE_SETTING_MASK, rc);
+ if (rc < 0)
+ return dev_err_probe(chip->dev, rc, "Couldn't set vbat max\n");
+
+ rc = smb2_init_irq(chip, &irq, "bat-ov", smb2_handle_batt_overvoltage);
+ if (rc < 0)
+ return rc;
+
+ rc = smb2_init_irq(chip, &chip->cable_irq, "usb-plugin",
+ smb2_handle_usb_plugin);
+ if (rc < 0)
+ return rc;
+
+ rc = smb2_init_irq(chip, &irq, "usbin-icl-change",
+ smb2_handle_usb_icl_change);
+ if (rc < 0)
+ return rc;
+ rc = smb2_init_irq(chip, &irq, "wdog-bark", smb2_handle_wdog_bark);
+ if (rc < 0)
+ return rc;
+
+ platform_set_drvdata(pdev, chip);
+
+ device_init_wakeup(chip->dev, 1);
+
+ /* Initialise charger state */
+ schedule_delayed_work(&chip->status_change_work, 0);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int smb2_suspend(struct device *dev)
+{
+ struct smb2_chip *chip = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ chip->wakeup_enabled = !enable_irq_wake(chip->cable_irq);
+
+ return 0;
+}
+
+static int smb2_resume(struct device *dev)
+{
+ struct smb2_chip *chip = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev) && chip->wakeup_enabled)
+ disable_irq_wake(chip->cable_irq);
+
+ power_supply_changed(chip->chg_psy);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(smb2_pm_ops, smb2_suspend, smb2_resume);
+
+static const struct of_device_id smb2_match_id_table[] = {
+ { .compatible = "qcom,pmi8998-charger" },
+ { .compatible = "qcom,pm660-charger" },
+ { /* sentinal */ }
+};
+MODULE_DEVICE_TABLE(of, smb2_match_id_table);
+
+static struct platform_driver qcom_spmi_smb2 = {
+ .probe = smb2_probe,
+ .driver = {
+ .name = "qcom-pmi8998-charger",
+ .pm = &smb2_pm_ops,
+ .of_match_table = smb2_match_id_table,
+ },
+};
+
+module_platform_driver(qcom_spmi_smb2);
+
+MODULE_AUTHOR("Caleb Connolly <[email protected]>");
+MODULE_DESCRIPTION("Qualcomm SMB2 Charger Driver");
+MODULE_LICENSE("GPL");
--
2.38.0
Hi,
On 08/10/22 13:37, Caleb Connolly wrote:
> Add a driver for the SMB2 charger block found in the Qualcomm PMI8998
> and PM660.
> This driver adds initial support for detecting USB cables and managing
> basic battery charging.
>
> Signed-off-by: Caleb Connolly <[email protected]>
I can confirm that this driver works as expected on boot and when
suspended/resumed. Tested in my Xiaomi Poco F1 running postmarketOS.
Tested-by: Joel Selvaraj <[email protected]>
Regards
Joel Selvaraj