Re: [PATCH v3 2/2] power: supply: mt6360_charger: add MT6360 charger support

From: Sebastian Reichel
Date: Wed Jan 06 2021 - 15:17:42 EST

Hi Gene,

I have a bunch of comments, please take a look at my inline
comments.

On Thu, Dec 24, 2020 at 03:48:04PM +0800, Gene Chen wrote:
> From: Gene Chen <gene_chen@xxxxxxxxxxx>
>
> Add basic support for the battery charger for MT6360 PMIC
>
> Signed-off-by: Gene Chen <gene_chen@xxxxxxxxxxx>
> ---
> drivers/power/supply/Kconfig | 10 +
> drivers/power/supply/Makefile | 1 +
> drivers/power/supply/mt6360_charger.c | 1054 +++++++++++++++++++++++++++++++++
> 3 files changed, 1065 insertions(+)
> create mode 100644 drivers/power/supply/mt6360_charger.c
>
> diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
> index eec646c..dd63bed 100644
> --- a/drivers/power/supply/Kconfig
> +++ b/drivers/power/supply/Kconfig
> @@ -567,6 +567,16 @@ config CHARGER_MP2629
> Battery charger. This driver provides Battery charger power management
> functions on the systems.
>
> +config CHARGER_MT6360
> + tristate "Mediatek MT6360 Charger Driver"
> + depends on MFD_MT6360
> + depends on REGULATOR
> + help
> + Say Y here to enable MT6360 Charger Part.
> + The device supports High-Accuracy Voltage/Current Regulation,
> + Average Input Current Regulation, Battery Tempature Sensing,
> + Over-Temperature Protection, DPDM Detection for BC1.2
> +
> config CHARGER_QCOM_SMBB
> tristate "Qualcomm Switch-Mode Battery Charger and Boost"
> depends on MFD_SPMI_PMIC || COMPILE_TEST
> diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
> index dd4b863..9bd0804 100644
> --- a/drivers/power/supply/Makefile
> +++ b/drivers/power/supply/Makefile
> @@ -77,6 +77,7 @@ obj-$(CONFIG_CHARGER_MAX77693) += max77693_charger.o
> obj-$(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_SMBB) += qcom_smbb.o
> obj-$(CONFIG_CHARGER_BQ2415X) += bq2415x_charger.o
> obj-$(CONFIG_CHARGER_BQ24190) += bq24190_charger.o
> diff --git a/drivers/power/supply/mt6360_charger.c b/drivers/power/supply/mt6360_charger.c
> new file mode 100644
> index 0000000..f1dcb97
> --- /dev/null
> +++ b/drivers/power/supply/mt6360_charger.c
> @@ -0,0 +1,1054 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2019 MediaTek Inc.

2019-2021? :)

> + */
> +
> +#include <linux/init.h>
> +#include <linux/module.h>
> +#include <linux/kernel.h>
> +#include <linux/regmap.h>
> +#include <linux/platform_device.h>
> +#include <linux/of.h>

change of.h to <linux/property.h> after implementing my later
change request.

> +#include <linux/interrupt.h>
> +#include <linux/power_supply.h>
> +#include <linux/regulator/driver.h>
> +
> +#define MT6360_PMU_CHG_CTRL1 0x311
> +#define MT6360_PMU_CHG_CTRL2 0x312
> +#define MT6360_PMU_CHG_CTRL3 0x313
> +#define MT6360_PMU_CHG_CTRL4 0x314
> +#define MT6360_PMU_CHG_CTRL5 0x315
> +#define MT6360_PMU_CHG_CTRL6 0x316
> +#define MT6360_PMU_CHG_CTRL7 0x317
> +#define MT6360_PMU_CHG_CTRL8 0x318
> +#define MT6360_PMU_CHG_CTRL9 0x319
> +#define MT6360_PMU_CHG_CTRL10 0x31A
> +#define MT6360_PMU_CHG_CTRL11 0x31B
> +#define MT6360_PMU_CHG_CTRL12 0x31C
> +#define MT6360_PMU_CHG_CTRL13 0x31D
> +#define MT6360_PMU_DEVICE_TYPE 0x322
> +#define MT6360_PMU_USB_STATUS1 0x327
> +#define MT6360_PMU_CHG_CTRL17 0x32B
> +#define MT6360_PMU_CHG_CTRL18 0x32C
> +#define MT6360_PMU_CHG_STAT 0x34A
> +#define MT6360_PMU_CHG_CTRL19 0x361
> +#define MT6360_PMU_FOD_STAT 0x3E7
> +
> +/* MT6360_PMU_CHG_CTRL1 */
> +#define MT6360_FSLP_SHFT (3)
> +#define MT6360_FSLP_MASK BIT(MT6360_FSLP_SHFT)
> +#define MT6360_HIZ_SHFT (2)
> +#define MT6360_HIZ_MASK BIT(MT6360_HIZ_SHFT)
> +#define MT6360_OPA_MODE_SHFT (0)
> +#define MT6360_OPA_MODE_MASK BIT(MT6360_OPA_MODE_SHFT)
> +/* MT6360_PMU_CHG_CTRL2 */
> +#define MT6360_TE_SHFT (4)
> +#define MT6360_TE_MASK BIT(MT6360_TE_SHFT)
> +#define MT6360_IINLMTSEL_SHFT (2)
> +#define MT6360_IINLMTSEL_MASK GENMASK(3, 2)
> +#define MT6360_CHG_EN_SHFT (0)
> +#define MT6360_CHG_EN_MASK BIT(MT6360_CHG_EN_SHFT)
> +/* MT6360_PMU_CHG_CTRL3 */
> +#define MT6360_IAICR_SHFT (2)
> +#define MT6360_IAICR_MASK GENMASK(7, 2)
> +#define MT6360_ILIM_EN_MASK BIT(0)
> +/* MT6360_PMU_CHG_CTRL4 */
> +#define MT6360_VOREG_SHFT (1)
> +#define MT6360_VOREG_MASK GENMASK(7, 1)
> +/* MT6360_PMU_CHG_CTRL5 */
> +#define MT6360_VOBST_MASK GENMASK(7, 2)
> +/* MT6360_PMU_CHG_CTRL6 */
> +#define MT6360_VMIVR_SHFT (1)
> +#define MT6360_VMIVR_MASK GENMASK(7, 1)
> +/* MT6360_PMU_CHG_CTRL7 */
> +#define MT6360_ICHG_SHFT (2)
> +#define MT6360_ICHG_MASK GENMASK(7, 2)
> +/* MT6360_PMU_CHG_CTRL8 */
> +#define MT6360_IPREC_SHFT (0)
> +#define MT6360_IPREC_MASK GENMASK(3, 0)
> +/* MT6360_PMU_CHG_CTRL9 */
> +#define MT6360_IEOC_SHFT (4)
> +#define MT6360_IEOC_MASK GENMASK(7, 4)
> +/* MT6360_PMU_CHG_CTRL10 */
> +#define MT6360_LBP_SHFT (4)
> +#define MT6360_LBP_MASK GENMASK(7, 4)
> +#define MT6360_OTG_OC_SHFT (0)
> +#define MT6360_OTG_OC_MASK GENMASK(3, 0)
> +/* MT6360_PMU_CHG_CTRL11 */
> +#define MT6360_SYSREG_SHFT (2)
> +#define MT6360_SYSREG_MASK GENMASK(4, 2)
> +#define MT6360_VREC_SHFT (0)
> +#define MT6360_VREC_MASK GENMASK(2, 0)
> +/* MT6360_PMU_CHG_CTRL12 */
> +#define MT6360_WT_FC_SHFT (5)
> +#define MT6360_WT_FC_MASK GENMASK(7, 5)
> +/* MT6360_PMU_CHG_CTRL13 */
> +#define MT6360_CHG_WDT_EN_SHFT (7)
> +#define MT6360_CHG_WDT_EN_MASK BIT(MT6360_CHG_WDT_EN_SHFT)
> +#define MT6360_CHG_WDT_SHFT (4)
> +#define MT6360_CHG_WDT_MASK GENMASK(5, 4)
> +/* MT6360_PMU_DEVICE_TYPE */
> +#define MT6360_USBCHGEN_SHFT (7)
> +#define MT6360_USBCHGEN_MASK BIT(MT6360_USBCHGEN_SHFT)
> +/* MT6360_PMU_USB_STATUS1 */
> +#define MT6360_USB_STATUS_SHFT (4)
> +#define MT6360_USB_STATUS_MASK GENMASK(6, 4)
> +/* MT6360_PMU_CHG_CTRL18 */
> +#define MT6360_BAT_COMP_SHFT (3)
> +#define MT6360_BAT_COMP_MASK GENMASK(5, 3)
> +#define MT6360_VCLAMP_SHFT (0)
> +#define MT6360_VCLAMP_MASK GENMASK(2, 0)
> +/* MT6360_PMU_CHG_STAT */
> +#define MT6360_CHG_STAT_SHFT (6)
> +#define MT6360_CHG_STAT_MASK GENMASK(7, 6)
> +#define MT6360_VBAT_LVL_MASK BIT(5)
> +/* MT6360_PMU_CHG_CTRL19 */
> +#define MT6360_VINOVP_SHFT (5)
> +#define MT6360_VINOVP_MASK GENMASK(6, 5)
> +/* MT6360_PMU_FOD_STAT */
> +#define MT6360_CHRDET_EXT_SHFT (4)
> +#define MT6360_CHRDET_EXT_MASK BIT(4)
> +
> +/* uA */
> +#define MT6360_ICHG_MIN 100000
> +#define MT6360_ICHG_MAX 5000000
> +#define MT6360_ICHG_STEP 100000
> +/* uV */
> +#define MT6360_VOREG_MIN 3900000
> +#define MT6360_VOREG_MAX 4710000
> +#define MT6360_VOREG_STEP 10000
> +/* uA */
> +#define MT6360_AICR_MIN 100000
> +#define MT6360_AICR_MAX 3250000
> +#define MT6360_AICR_STEP 50000
> +/* uA */
> +#define MT6360_IPREC_MIN 100000
> +#define MT6360_IPREC_MAX 850000
> +#define MT6360_IPREC_STEP 50000
> +/* uA */
> +#define MT6360_IEOC_MIN 100000
> +#define MT6360_IEOC_MAX 850000
> +#define MT6360_IEOC_STEP 50000
> +
> +struct mt6360_chg_platform_data {
> + u32 vinovp;
> +};

I think it's pointless to have the platform_data struct.
More about that later.

> +struct mt6360_chg_info {
> + struct device *dev;
> + struct mt6360_chg_platform_data *pdata;
> + struct regmap *regmap;
> + struct power_supply_desc psy_desc;
> + struct power_supply *psy;
> + struct regulator_dev *otg_rdev;
> + struct mutex chgdet_lock;
> + bool pwr_rdy;
> + bool bc12_en;
> + int psy_usb_type;
> + struct work_struct chrdet_work;
> +};
> +
> +static struct mt6360_chg_platform_data def_platform_data = {
> + .vinovp = 6500000,
> +};
> +
> +enum mt6360_iinlmtsel {
> + MT6360_IINLMTSEL_AICR_3250 = 0,
> + MT6360_IINLMTSEL_CHG_TYPE,
> + MT6360_IINLMTSEL_AICR,
> + MT6360_IINLMTSEL_LOWER_LEVEL,
> +};
> +
> +enum mt6360_pmu_chg_type {
> + MT6360_CHG_TYPE_NOVBUS = 0,
> + MT6360_CHG_TYPE_UNDER_GOING,
> + MT6360_CHG_TYPE_SDP,
> + MT6360_CHG_TYPE_SDPNSTD,
> + MT6360_CHG_TYPE_DCP,
> + MT6360_CHG_TYPE_CDP,
> + MT6360_CHG_TYPE_MAX,
> +};
> +
> +static enum power_supply_usb_type mt6360_charger_usb_types[] = {
> + POWER_SUPPLY_USB_TYPE_UNKNOWN,
> + POWER_SUPPLY_USB_TYPE_SDP,
> + POWER_SUPPLY_USB_TYPE_DCP,
> + POWER_SUPPLY_USB_TYPE_CDP,
> + POWER_SUPPLY_USB_TYPE_C,
> + POWER_SUPPLY_USB_TYPE_PD,
> + POWER_SUPPLY_USB_TYPE_PD_DRP,
> + POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID

driver/hardware does not seem to support Type-C, PD, PD-DRP and the
special Apple type. Any unsupported type should not be listed.

> +};
> +
> +static unsigned int mt6360_map_reg_sel(u32 data, u32 min, u32 max, u32 step)
> +{
> + u32 target = 0, max_sel;
> +
> + if (data >= min) {
> + target = (data - min) / step;
> + max_sel = (max - min) / step;
> + if (target > max_sel)
> + target = max_sel;
> + }
> + return target;
> +}
> +
> +static u32 mt6360_map_real_val(u32 sel, u32 min, u32 max, u32 step)
> +{
> + u32 target = 0;
> +
> + target = min + (sel * step);
> + if (target > max)
> + target = max;
> + return target;
> +}
> +
> +static int mt6360_get_chrdet_ext_stat(struct mt6360_chg_info *mci,
> + bool *pwr_rdy)
> +{
> + int ret;
> + unsigned int regval;
> +
> + ret = regmap_read(mci->regmap, MT6360_PMU_FOD_STAT, &regval);
> + if (ret < 0)
> + return ret;
> + *pwr_rdy = (regval & MT6360_CHRDET_EXT_MASK) ? true : false;
> + return 0;
> +}
> +
> +static int mt6360_charger_get_online(struct mt6360_chg_info *mci,
> + union power_supply_propval *val)
> +{
> + int ret;
> + bool pwr_rdy;
> +
> + ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
> + if (ret < 0)
> + return ret;
> + val->intval = pwr_rdy ? true : false;
> + return 0;
> +}
> +
> +static int mt6360_charger_get_status(struct mt6360_chg_info *mci,
> + union power_supply_propval *val)
> +{
> + int status, ret;
> + unsigned int regval;
> + bool pwr_rdy;
> +
> + ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
> + if (ret < 0)
> + return ret;
> + if (!pwr_rdy) {
> + status = POWER_SUPPLY_STATUS_DISCHARGING;
> + goto out;
> + }
> +
> + ret = regmap_read(mci->regmap, MT6360_PMU_CHG_STAT, &regval);
> + if (ret < 0)
> + return ret;
> + regval &= MT6360_CHG_STAT_MASK;
> + regval >>= MT6360_CHG_STAT_SHFT;
> + switch (regval) {
> + case 0x0:
> + status = POWER_SUPPLY_STATUS_NOT_CHARGING;
> + break;
> + case 0x1:
> + status = POWER_SUPPLY_STATUS_CHARGING;
> + break;
> + case 0x2:
> + status = POWER_SUPPLY_STATUS_FULL;
> + break;
> + default:
> + ret = -EIO;
> + }
> +out:
> + if (!ret)
> + val->intval = status;
> + return ret;
> +}
> +
> +static int mt6360_charger_get_charge_type(struct mt6360_chg_info *mci,
> + union power_supply_propval *val)
> +{
> + int type, ret;
> + unsigned int regval;
> + u8 chg_stat;
> +
> + ret = regmap_read(mci->regmap, MT6360_PMU_CHG_STAT, &regval);
> + if (ret < 0)
> + return ret;
> +
> + chg_stat = (regval & MT6360_CHG_STAT_MASK) >> MT6360_CHG_STAT_SHFT;
> + switch (chg_stat) {
> + case 0x01: /* Charge in Progress */
> + if (regval & MT6360_VBAT_LVL_MASK)
> + type = POWER_SUPPLY_CHARGE_TYPE_FAST;
> + else
> + type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
> + break;
> + case 0x00: /* Not Charging */
> + case 0x02: /* Charge Done */
> + case 0x03: /* Charge Fault */
> + default:
> + type = POWER_SUPPLY_CHARGE_TYPE_NONE;
> + break;
> + }
> +
> + val->intval = type;
> + return 0;
> +}
> +
> +static int mt6360_charger_get_ichg(struct mt6360_chg_info *mci,
> + union power_supply_propval *val)
> +{
> + int ret;
> + unsigned int regval;
> +
> + ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL7, &regval);
> + if (ret < 0)
> + return ret;
> + regval = (regval & MT6360_ICHG_MASK) >> MT6360_ICHG_SHFT;
> + val->intval = mt6360_map_real_val(regval,
> + MT6360_ICHG_MIN,
> + MT6360_ICHG_MAX,
> + MT6360_ICHG_STEP);
> + return 0;
> +}

It's unusual, that you do not need any scaling. Does the hardware
really report voltages in µV and currents in µA?

> +static int mt6360_charger_get_max_ichg(struct mt6360_chg_info *mci,
> + union power_supply_propval *val)
> +{
> + val->intval = MT6360_ICHG_MAX;
> + return 0;
> +}
> +
> +static int mt6360_charger_get_cv(struct mt6360_chg_info *mci,
> + union power_supply_propval *val)
> +{
> + int ret;
> + unsigned int regval;
> +
> + ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL4, &regval);
> + if (ret < 0)
> + return ret;
> + regval = (regval & MT6360_VOREG_MASK) >> MT6360_VOREG_SHFT;
> + val->intval = mt6360_map_real_val(regval,
> + MT6360_VOREG_MIN,
> + MT6360_VOREG_MAX,
> + MT6360_VOREG_STEP);
> + return 0;
> +}
> +
> +static int mt6360_charger_get_max_cv(struct mt6360_chg_info *mci,
> + union power_supply_propval *val)
> +{
> + val->intval = MT6360_VOREG_MAX;
> + return 0;
> +}
> +
> +static int mt6360_charger_get_aicr(struct mt6360_chg_info *mci,
> + union power_supply_propval *val)
> +{
> + int ret;
> + unsigned int regval;
> +
> + ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL3, &regval);
> + if (ret < 0)
> + return ret;
> + regval = (regval & MT6360_IAICR_MASK) >> MT6360_IAICR_SHFT;
> + val->intval = mt6360_map_real_val(regval,
> + MT6360_AICR_MIN,
> + MT6360_AICR_MAX,
> + MT6360_AICR_STEP);
> + return 0;
> +}
> +
> +static int mt6360_charger_get_iprechg(struct mt6360_chg_info *mci,
> + union power_supply_propval *val)
> +{
> + int ret;
> + unsigned int regval;
> +
> + ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL8, &regval);
> + if (ret < 0)
> + return ret;
> + regval = (regval & MT6360_IPREC_MASK) >> MT6360_IPREC_SHFT;
> + val->intval = mt6360_map_real_val(regval,
> + MT6360_IPREC_MIN,
> + MT6360_IPREC_MAX,
> + MT6360_IPREC_STEP);
> + return 0;
> +}
> +
> +static int mt6360_charger_get_ieoc(struct mt6360_chg_info *mci,
> + union power_supply_propval *val)
> +{
> + int ret;
> + unsigned int regval;
> +
> + ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL9, &regval);
> + if (ret < 0)
> + return ret;
> + regval = (regval & MT6360_IEOC_MASK) >> MT6360_IEOC_SHFT;
> + val->intval = mt6360_map_real_val(regval,
> + MT6360_IEOC_MIN,
> + MT6360_IEOC_MAX,
> + MT6360_IEOC_STEP);
> + return 0;
> +}
> +
> +static int mt6360_charger_set_online(struct mt6360_chg_info *mci,
> + const union power_supply_propval *val)
> +{
> + u8 force_sleep = val->intval ? 0 : 1;
> +
> + return regmap_update_bits(mci->regmap,
> + MT6360_PMU_CHG_CTRL1,
> + MT6360_FSLP_MASK,
> + force_sleep << MT6360_FSLP_SHFT);
> +}
> +
> +static int mt6360_charger_set_ichg(struct mt6360_chg_info *mci,
> + const union power_supply_propval *val)
> +{
> + u8 sel;
> +
> + sel = mt6360_map_reg_sel(val->intval,
> + MT6360_ICHG_MIN,
> + MT6360_ICHG_MAX,
> + MT6360_ICHG_STEP);
> + return regmap_update_bits(mci->regmap,
> + MT6360_PMU_CHG_CTRL7,
> + MT6360_ICHG_MASK,
> + sel << MT6360_ICHG_SHFT);
> +}
> +
> +static int mt6360_charger_set_cv(struct mt6360_chg_info *mci,
> + const union power_supply_propval *val)
> +{
> + u8 sel;
> +
> + sel = mt6360_map_reg_sel(val->intval,
> + MT6360_VOREG_MIN,
> + MT6360_VOREG_MAX,
> + MT6360_VOREG_STEP);
> + return regmap_update_bits(mci->regmap,
> + MT6360_PMU_CHG_CTRL4,
> + MT6360_VOREG_MASK,
> + sel << MT6360_VOREG_SHFT);
> +}
> +
> +static int mt6360_charger_set_aicr(struct mt6360_chg_info *mci,
> + const union power_supply_propval *val)
> +{
> + u8 sel;
> +
> + sel = mt6360_map_reg_sel(val->intval,
> + MT6360_AICR_MIN,
> + MT6360_AICR_MAX,
> + MT6360_AICR_STEP);
> + return regmap_update_bits(mci->regmap,
> + MT6360_PMU_CHG_CTRL3,
> + MT6360_IAICR_MASK,
> + sel << MT6360_IAICR_SHFT);
> +}
> +
> +static int mt6360_charger_set_iprechg(struct mt6360_chg_info *mci,
> + const union power_supply_propval *val)
> +{
> + u8 sel;
> +
> + sel = mt6360_map_reg_sel(val->intval,
> + MT6360_IPREC_MIN,
> + MT6360_IPREC_MAX,
> + MT6360_IPREC_STEP);
> + return regmap_update_bits(mci->regmap,
> + MT6360_PMU_CHG_CTRL8,
> + MT6360_IPREC_MASK,
> + sel << MT6360_IPREC_SHFT);
> +}
> +
> +static int mt6360_charger_set_ieoc(struct mt6360_chg_info *mci,
> + const union power_supply_propval *val)
> +{
> + u8 sel;
> +
> + sel = mt6360_map_reg_sel(val->intval,
> + MT6360_IEOC_MIN,
> + MT6360_IEOC_MAX,
> + MT6360_IEOC_STEP);
> + return regmap_update_bits(mci->regmap,
> + MT6360_PMU_CHG_CTRL9,
> + MT6360_IEOC_MASK,
> + sel << MT6360_IEOC_SHFT);
> +}
> +
> +static int mt6360_charger_get_property(struct power_supply *psy,
> + enum power_supply_property psp,
> + union power_supply_propval *val)
> +{
> + struct mt6360_chg_info *mci = power_supply_get_drvdata(psy);
> + int ret = 0;
> +
> + dev_dbg(mci->dev, "%s: prop = %d\n", __func__, psp);

drop this debug message. It's only useful during development.

> + switch (psp) {
> + case POWER_SUPPLY_PROP_ONLINE:
> + ret = mt6360_charger_get_online(mci, val);
> + break;
> + case POWER_SUPPLY_PROP_STATUS:
> + ret = mt6360_charger_get_status(mci, val);
> + break;
> + case POWER_SUPPLY_PROP_CHARGE_TYPE:
> + ret = mt6360_charger_get_charge_type(mci, val);
> + break;
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
> + ret = mt6360_charger_get_ichg(mci, val);
> + break;
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
> + ret = mt6360_charger_get_max_ichg(mci, val);
> + break;
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
> + ret = mt6360_charger_get_cv(mci, val);
> + break;
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
> + ret = mt6360_charger_get_max_cv(mci, val);
> + break;
> + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
> + ret = mt6360_charger_get_aicr(mci, val);
> + break;
> + case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
> + ret = mt6360_charger_get_iprechg(mci, val);
> + break;
> + case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
> + ret = mt6360_charger_get_ieoc(mci, val);
> + break;
> + case POWER_SUPPLY_PROP_USB_TYPE:
> + val->intval = mci->psy_usb_type;
> + break;
> + default:
> + ret = -ENODATA;
> + }
> + return ret;
> +}
> +
> +static int mt6360_charger_set_property(struct power_supply *psy,
> + enum power_supply_property psp,
> + const union power_supply_propval *val)
> +{
> + struct mt6360_chg_info *mci = power_supply_get_drvdata(psy);
> + int ret;
> +
> + dev_dbg(mci->dev, "%s: prop = %d\n", __func__, psp);

drop this debug message. It's only useful during development.

> + switch (psp) {
> + case POWER_SUPPLY_PROP_ONLINE:
> + ret = mt6360_charger_set_online(mci, val);
> + break;
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
> + ret = mt6360_charger_set_ichg(mci, val);
> + break;
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
> + ret = mt6360_charger_set_cv(mci, val);
> + break;
> + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
> + ret = mt6360_charger_set_aicr(mci, val);
> + break;
> + case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
> + ret = mt6360_charger_set_iprechg(mci, val);
> + break;
> + case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
> + ret = mt6360_charger_set_ieoc(mci, val);
> + break;
> + default:
> + ret = -EINVAL;
> + }
> + return ret;
> +}
> +
> +static int mt6360_charger_property_is_writeable(struct power_supply *psy,
> + enum power_supply_property psp)
> +{
> + switch (psp) {
> + case POWER_SUPPLY_PROP_ONLINE:
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
> + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
> + case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
> + case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
> + return 1;
> + default:
> + return 0;
> + }
> +}
> +
> +static enum power_supply_property mt6360_charger_properties[] = {
> + POWER_SUPPLY_PROP_ONLINE,
> + POWER_SUPPLY_PROP_STATUS,
> + POWER_SUPPLY_PROP_CHARGE_TYPE,
> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
> + POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
> + POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
> + POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
> + POWER_SUPPLY_PROP_USB_TYPE,
> +};
> +
> +static char *mt6360_charger_supplied_to[] = {
> + "main-battery"
> +};
> +
> +static const struct power_supply_desc mt6360_charger_desc = {
> + .type = POWER_SUPPLY_TYPE_USB,
> + .properties = mt6360_charger_properties,
> + .num_properties = ARRAY_SIZE(mt6360_charger_properties),
> + .get_property = mt6360_charger_get_property,
> + .set_property = mt6360_charger_set_property,
> + .property_is_writeable = mt6360_charger_property_is_writeable,
> + .usb_types = mt6360_charger_usb_types,
> + .num_usb_types = ARRAY_SIZE(mt6360_charger_usb_types),
> +};
> +
> +static const struct regulator_ops mt6360_chg_otg_ops = {
> + .list_voltage = regulator_list_voltage_linear,
> + .enable = regulator_enable_regmap,
> + .disable = regulator_disable_regmap,
> + .is_enabled = regulator_is_enabled_regmap,
> + .set_voltage_sel = regulator_set_voltage_sel_regmap,
> + .get_voltage_sel = regulator_get_voltage_sel_regmap,
> +};
> +
> +static const struct regulator_desc mt6360_otg_rdesc = {
> + .of_match = "usb-otg-vbus",
> + .name = "usb-otg-vbus",
> + .ops = &mt6360_chg_otg_ops,
> + .owner = THIS_MODULE,
> + .type = REGULATOR_VOLTAGE,
> + .min_uV = 4425000,
> + .uV_step = 25000,
> + .n_voltages = 57,
> + .vsel_reg = MT6360_PMU_CHG_CTRL5,
> + .vsel_mask = MT6360_VOBST_MASK,
> + .enable_reg = MT6360_PMU_CHG_CTRL1,
> + .enable_mask = MT6360_OPA_MODE_MASK,
> +};
> +
> +static irqreturn_t mt6360_pmu_attach_i_handler(int irq, void *data)
> +{
> + struct mt6360_chg_info *mci = data;
> + int ret;
> + unsigned int usb_status;
> + int last_usb_type;
> +
> + dev_dbg(mci->dev, "%s\n", __func__);

please change string to something more sensible to users debugging
problems without having read the driver code before, sth. like
"received attach interrupt".

> + mutex_lock(&mci->chgdet_lock);
> + if (!mci->bc12_en) {
> + dev_info(mci->dev, "%s: bc12 disabled, ignore irq\n", __func__);
> + goto out;
> + }

Why is this info level? I would expect it to be either debug or
warning/error. Also drop all those __func__ and provide proper
debug messages instead.

> + last_usb_type = mci->psy_usb_type;
> + /* Plug in */
> + ret = regmap_read(mci->regmap, MT6360_PMU_USB_STATUS1, &usb_status);
> + if (ret < 0)
> + goto out;
> + usb_status &= MT6360_USB_STATUS_MASK;
> + usb_status >>= MT6360_USB_STATUS_SHFT;
> + switch (usb_status) {
> + case MT6360_CHG_TYPE_UNDER_GOING:
> + dev_info(mci->dev, "%s: under going...\n", __func__);
> + goto out;

IDK what this is supposed to tell me. Do you mean "detection in
progress"? Also why is this info level? I would expect either
debug (assuming it happens regularly and is normal) or warning
(assuming it should not happen).

> + case MT6360_CHG_TYPE_SDP:
> + mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
> + break;
> + case MT6360_CHG_TYPE_SDPNSTD:
> + mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
> + break;
> + case MT6360_CHG_TYPE_CDP:
> + mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
> + break;
> + case MT6360_CHG_TYPE_DCP:
> + mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
> + break;
> + default:
> + dev_warn(mci->dev,
> + "%s: disconnect or unknown status\n", __func__);

So you are printing a warning on every disconnect?
Please do not spam device messages.

> + goto out;
> + }
> +
> + dev_info(mci->dev, "%s: chg_type = %d\n", __func__, mci->psy_usb_type);

This should be debug level.

> + if (last_usb_type != mci->psy_usb_type)
> + power_supply_changed(mci->psy);
> +out:
> + mutex_unlock(&mci->chgdet_lock);
> + return IRQ_HANDLED;
> +}
> +
> +static void mt6360_handle_chrdet_ext_evt(struct mt6360_chg_info *mci)
> +{
> + int ret;
> + bool pwr_rdy;
> +
> + mutex_lock(&mci->chgdet_lock);
> + ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
> + if (ret < 0)
> + goto out;
> + if (mci->pwr_rdy == pwr_rdy) {
> + dev_info(mci->dev,
> + "%s: pwr_rdy is same(%d)\n", __func__, pwr_rdy);
> + goto out;
> + }
> + mci->pwr_rdy = pwr_rdy;
> + dev_info(mci->dev, "%s: pwr_rdy = %d\n", __func__, pwr_rdy);
> + if (!pwr_rdy) {
> + mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
> + power_supply_changed(mci->psy);
> +
> + }
> + ret = regmap_update_bits(mci->regmap,
> + MT6360_PMU_DEVICE_TYPE,
> + MT6360_USBCHGEN_MASK,
> + pwr_rdy ? MT6360_USBCHGEN_MASK : 0);
> + if (ret < 0)
> + goto out;
> + mci->bc12_en = pwr_rdy;
> +out:
> + mutex_unlock(&mci->chgdet_lock);
> +}
> +
> +static void mt6360_chrdet_work(struct work_struct *work)
> +{
> + struct mt6360_chg_info *mci = (struct mt6360_chg_info *)container_of(
> + work, struct mt6360_chg_info, chrdet_work);
> +
> + dev_info(mci->dev, "%s\n", __func__);
> + mt6360_handle_chrdet_ext_evt(mci);
> +}
> +
> +static irqreturn_t mt6360_pmu_chrdet_ext_evt_handler(int irq, void *data)
> +{
> + struct mt6360_chg_info *mci = data;
> +
> + dev_info(mci->dev, "%s\n", __func__);
> + mt6360_handle_chrdet_ext_evt(mci);
> + return IRQ_HANDLED;
> +}
> +
> +static int mt6360_chg_irq_register(struct platform_device *pdev)
> +{
> + const struct {
> + const char *name;
> + irq_handler_t handler;
> + } irq_descs[] = {
> + { "attach_i", mt6360_pmu_attach_i_handler },
> + { "chrdet_ext_evt", mt6360_pmu_chrdet_ext_evt_handler }
> + };
> + int i, ret;
> +
> + for (i = 0; i < ARRAY_SIZE(irq_descs); i++) {
> + ret = platform_get_irq_byname(pdev, irq_descs[i].name);
> + if (ret < 0)
> + return ret;
> +
> + ret = devm_request_threaded_irq(&pdev->dev, ret, NULL,
> + irq_descs[i].handler,
> + IRQF_TRIGGER_FALLING,
> + irq_descs[i].name,
> + platform_get_drvdata(pdev));
> + if (ret < 0) {
> + dev_err(&pdev->dev, "Failed to request %s irq\n",
> + irq_descs[i].name);
> + return ret;
> + }
> + }
> +
> + return 0;
> +}
> +
> +struct mt6360_field_info {
> + struct device_attribute dev_attr;
> + u16 reg;
> + u8 mask;
> + u8 shft;
> +};
> +
> +static ssize_t mt6360_sysfs_show(struct device *dev,
> + struct device_attribute *attr, char *buf);
> +static ssize_t mt6360_sysfs_store(struct device *dev,
> + struct device_attribute *attr, const char *buf, size_t count);
> +
> +#define MT6360_FIELD_RW(_name, _reg, _nbit) \
> +{ \
> + .dev_attr = __ATTR(_name, 0664, \
> + mt6360_sysfs_show, mt6360_sysfs_store), \
> + .reg = MT6360_PMU_##_reg, \
> + .mask = MT6360_##_nbit##_MASK, \
> + .shft = MT6360_##_nbit##_SHFT, \
> +}
> +
> +#define MT6360_FIELD_RO(_name, _reg, _nbit) \
> +{ \
> + .dev_attr = __ATTR(_name, 0444, \
> + mt6360_sysfs_show, NULL), \
> + .reg = MT6360_PMU_##_reg, \
> + .mask = MT6360_##_nbit##_MASK, \
> + .shft = MT6360_##_nbit##_SHFT, \
> +}
> +
> +static struct mt6360_field_info mt6360_field_tbl[] = {
> + MT6360_FIELD_RW(hiz, CHG_CTRL1, HIZ),
> + MT6360_FIELD_RW(vmivr, CHG_CTRL6, VMIVR),
> + MT6360_FIELD_RW(iaicr, CHG_CTRL3, IAICR),
> + MT6360_FIELD_RW(SYSREG, CHG_CTRL11, SYSREG),
> + MT6360_FIELD_RW(otg_oc, CHG_CTRL10, OTG_OC),
> + MT6360_FIELD_RW(ichg, CHG_CTRL17, ICHG),
> + MT6360_FIELD_RW(iprec, CHG_CTRL8, IPREC),
> + MT6360_FIELD_RW(ieoc, CHG_CTRL9, IEOC),
> + MT6360_FIELD_RW(voreg, CHG_CTRL4, VOREG),
> + MT6360_FIELD_RW(lbp, CHG_CTRL10, LBP),
> + MT6360_FIELD_RW(vrec, CHG_CTRL11, VREC),
> + MT6360_FIELD_RW(te, CHG_CTRL2, TE),
> + MT6360_FIELD_RW(chg_wdt_en, CHG_CTRL13, CHG_WDT_EN),
> + MT6360_FIELD_RW(chg_wdt, CHG_CTRL13, CHG_WDT),
> + MT6360_FIELD_RW(wt_fc, CHG_CTRL12, WT_FC),
> + MT6360_FIELD_RW(bat_comp, CHG_CTRL18, BAT_COMP),
> + MT6360_FIELD_RW(vclamp, CHG_CTRL18, VCLAMP),
> + MT6360_FIELD_RW(usbchgen, DEVICE_TYPE, USBCHGEN),
> + MT6360_FIELD_RW(chg_en, CHG_CTRL2, CHG_EN),
> + MT6360_FIELD_RO(chrdet_ext, FOD_STAT, CHRDET_EXT),
> +};
> +
> +static struct attribute *mt6360_attrs[ARRAY_SIZE(mt6360_field_tbl) + 1];
> +
> +static const struct attribute_group mt6360_attr_group = {
> + .attrs = mt6360_attrs,
> +};
> +
> +static ssize_t mt6360_sysfs_show(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct mt6360_chg_info *mci = dev_get_drvdata(dev->parent);
> + struct mt6360_field_info *info = (void *)attr;
> + unsigned int regval;
> + int ret;
> +
> + ret = regmap_read(mci->regmap, info->reg, &regval);
> + if (ret < 0)
> + return ret;
> + regval = (regval & info->mask) >> info->shft;
> + return scnprintf(buf, PAGE_SIZE, "%02x\n", regval);
> +}
> +
> +static ssize_t mt6360_sysfs_store(struct device *dev,
> + struct device_attribute *attr, const char *buf, size_t count)
> +{
> + struct mt6360_chg_info *mci = dev_get_drvdata(dev->parent);
> + struct mt6360_field_info *info = (void *)attr;
> + int ret, tmp;
> +
> + if (kstrtoint(buf, 10, &tmp) < 0) {
> + dev_err(dev, "Failed to parse number\n");
> + return -EINVAL;
> + }
> + ret = regmap_update_bits(mci->regmap,
> + info->reg, info->mask, tmp << info->shft);
> + if (ret < 0)
> + return ret;
> + return count;
> +}
> +
> +static int mt6360_sysfs_create_group(struct mt6360_chg_info *mci)
> +{
> + int i, tb_size = ARRAY_SIZE(mt6360_field_tbl);
> +
> + for (i = 0; i < tb_size; i++)
> + mt6360_attrs[i] = &(mt6360_field_tbl[i].dev_attr.attr);
> + return devm_device_add_group(&mci->psy->dev, &mt6360_attr_group);
> +}
> +
> +static int mt6360_chg_init_setting(struct mt6360_chg_info *mci)
> +{
> + int ret;
> +
> + ret = regmap_update_bits(mci->regmap, MT6360_PMU_DEVICE_TYPE,
> + MT6360_USBCHGEN_MASK, 0);
> + if (ret < 0) {
> + dev_err(mci->dev, "%s: Failed to disable bc12\n", __func__);
> + goto out;
> + }
> + ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL2,
> + MT6360_IINLMTSEL_MASK,
> + MT6360_IINLMTSEL_AICR <<
> + MT6360_IINLMTSEL_SHFT);
> + if (ret < 0) {
> + dev_err(mci->dev,
> + "%s: Failed to switch iinlmtsel to aicr\n", __func__);
> + goto out;
> + }
> + usleep_range(5000, 6000);
> + ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL3,
> + MT6360_ILIM_EN_MASK, 0);
> + if (ret < 0) {
> + dev_err(mci->dev,
> + "%s: Failed to disable ilim\n", __func__);
> + goto out;
> + }
> + ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL10,
> + MT6360_OTG_OC_MASK, MT6360_OTG_OC_MASK);
> + if (ret < 0) {
> + dev_err(mci->dev,
> + "%s: Failed to config otg oc to 3A\n", __func__);
> + }
> +out:
> + return ret;

remove useless goto and return directly like this (without the
__func__ part):

ret = regmap_update_bits(...);
if (ret < 0)
return dev_err_probe(mci->dev, ret, "Failed to do xyz!\n").

> +}
> +
> +static u32 mt6360_vinovp_trans_to_sel(u32 val)
> +{
> + u32 vinovp_tbl[] = { 5500000, 6500000, 11000000, 14500000 };
> + int i;
> +
> + /* Select the smaller and equal supported value */
> + for (i = 0; i < ARRAY_SIZE(vinovp_tbl)-1; i++) {
> + if (val < vinovp_tbl[i+1])
> + break;
> + }
> + return i;
> +}
> +
> +static struct mt6360_chg_platform_data *mt6360_parse_pdata(
> + struct platform_device *pdev)
> +{
> + struct mt6360_chg_platform_data *pdata = dev_get_platdata(&pdev->dev);
> + struct device_node *np = pdev->dev.of_node;
> + int ret;
> +
> + pdata = kmemdup(&def_platform_data, sizeof(*pdata), GFP_KERNEL);
> + ret = of_property_read_u32(np, "richtek,vinovp-microvolt",
> + &pdata->vinovp);

use device_property_read_u32();

> + if (ret) {
> + dev_err(&pdev->dev, "Failed to parse vinovp in DT\n");
> + return ERR_PTR(ret);
> + }
> + return pdata;
> +}
> +
> +static int mt6360_apply_pdata(struct platform_device *pdev)
> +{
> + struct mt6360_chg_platform_data *pdata = dev_get_platdata(&pdev->dev);
> + struct mt6360_chg_info *mci = dev_get_drvdata(&pdev->dev);
> + int ret;
> + u32 sel;
> +
> + sel = mt6360_vinovp_trans_to_sel(pdata->vinovp);
> + ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL19,
> + MT6360_VINOVP_MASK, sel << MT6360_VINOVP_SHFT);
> + if (ret)
> + return ret;
> + return 0;
> +}
> +
> +static int mt6360_charger_probe(struct platform_device *pdev)
> +{
> + struct mt6360_chg_platform_data *pdata = dev_get_platdata(&pdev->dev);

The value is unused, so init to NULL or not at all.

> + struct mt6360_chg_info *mci;
> + struct power_supply_config charger_cfg = {};
> + struct regulator_config config = { };
> + int ret;
> +
> + mci = devm_kzalloc(&pdev->dev, sizeof(*mci), GFP_KERNEL);
> + if (!mci)
> + return -ENOMEM;
> +
> + pdata = mt6360_parse_pdata(pdev);
> + if (IS_ERR_OR_NULL(pdata))
> + return PTR_ERR(pdata);
> +
> + pdev->dev.platform_data = pdata;

instead of all this code for a single variable, just store it
directly into struct mt6360_chg_info and drop all that
platform_data code. Also no need to move it into extra function:

mci->vinovp = 6500000;
device_property_read_u32(&pdev->dev, "richtek,vinovp-microvolt", &mci->vinovp);

> + mci->dev = &pdev->dev;
> + mutex_init(&mci->chgdet_lock);
> + platform_set_drvdata(pdev, mci);
> + INIT_WORK(&mci->chrdet_work, &mt6360_chrdet_work);
> +
> + mci->regmap = dev_get_regmap(pdev->dev.parent, NULL);
> + if (!mci->regmap) {
> + dev_err(&pdev->dev, "Failed to get parent regmap\n");
> + return -ENODEV;
> + }

use 'return dev_err_probe(&pdev->dev, -ENODEV, "...");

> + ret = mt6360_apply_pdata(pdev);
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to apply pdata\n");
> + return ret;
> + }

use 'return dev_err_probe(&pdev->dev, ret, "...");

Also can this function be folded into mt6360_chg_init_setting()?

> + memcpy(&mci->psy_desc, &mt6360_charger_desc, sizeof(mci->psy_desc));
> + mci->psy_desc.name = dev_name(&pdev->dev);
> + charger_cfg.drv_data = mci;
> + charger_cfg.of_node = pdev->dev.of_node;
> + charger_cfg.supplied_to = mt6360_charger_supplied_to;
> + charger_cfg.num_supplicants = ARRAY_SIZE(mt6360_charger_supplied_to);

why do you need to provide supplied_to? this should be generated
automatically from devicetree.

> + mci->psy = devm_power_supply_register(&pdev->dev,
> + &mci->psy_desc, &charger_cfg);
> + if (IS_ERR(mci->psy)) {
> + dev_err(&pdev->dev, "Failed to register power supply dev\n");
> + return PTR_ERR(mci->psy);
> + }

dev_err_probe()

> +
> + ret = mt6360_chg_init_setting(mci);
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to initial setting\n");
> + return ret;
> + }

dev_err_probe()

> + schedule_work(&mci->chrdet_work);

considering work is only scheduled once in this place, why do you
need it? can't you simply call mt6360_handle_chrdet_ext_evt() here
and remove all worker related code?

> + ret = mt6360_chg_irq_register(pdev);
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to register irqs\n");
> + return ret;
> + }

dev_err_probe();

> + config.dev = &pdev->dev;
> + config.regmap = mci->regmap;
> + mci->otg_rdev = devm_regulator_register(&pdev->dev, &mt6360_otg_rdesc,
> + &config);
> + if (IS_ERR(mci->otg_rdev))
> + return PTR_ERR(mci->otg_rdev);
> +
> + ret = mt6360_sysfs_create_group(mci);
> + if (ret) {
> + dev_err(&pdev->dev,
> + "%s: Failed to create sysfs attrs\n", __func__);
> + return ret;
> + }

Use charger_cfg.attr_grp to register custom sysfs group for
power-supply devices. Otherwise your code is racy (udev may not pick
up the sysfs attributes). Also custom sysfs attributes need to be
documented in Documentation/ABI/testing/sysfs-class-power-<driver>.

Looking at the attributes you are planning to expose, I don't think they
are suitable for sysfs anyways. Looks more like a debug interface, which
should go into debugfs instead. But it's hard to tell without any documentation
being provided :)

> + return 0;
> +}
> +
> +static const struct of_device_id __maybe_unused mt6360_charger_of_id[] = {
> + { .compatible = "mediatek,mt6360-chg", },
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, mt6360_charger_of_id);
> +
> +static const struct platform_device_id mt6360_charger_id[] = {
> + { "mt6360-chg", 0 },
> + {},
> +};
> +MODULE_DEVICE_TABLE(platform, mt6360_charger_id);
> +
> +static struct platform_driver mt6360_charger_driver = {
> + .driver = {
> + .name = "mt6360-chg",
> + .of_match_table = of_match_ptr(mt6360_charger_of_id),
> + },
> + .probe = mt6360_charger_probe,
> + .id_table = mt6360_charger_id,
> +};
> +module_platform_driver(mt6360_charger_driver);
> +
> +MODULE_AUTHOR("CY_Huang <cy_huang@xxxxxxxxxxx>");

Can you fix the name? Also it differs from you, but I do not see any
extra Signed-off-by line?

Thanks,

-- Sebastian

> +MODULE_DESCRIPTION("MT6360 Charger Driver");
> +MODULE_LICENSE("GPL");
> --
> 2.7.4
>

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