[v6,2/2] power: supply: bq256xx: Introduce the BQ256XX charger driver

The BQ256XX family of devices are highly integrated buck chargers
for single cell batteries.

Signed-off-by: Ricardo Rivera-Matos <r-rivera-matos@ti.com>

v5 - adds power_supply_put_battery_info() and devm_add_action_or_rest() calls

v6 - implements bq256xx_remove function
---
 drivers/power/supply/Kconfig           |   11 +
 drivers/power/supply/Makefile          |    1 +
 drivers/power/supply/bq256xx_charger.c | 1803 ++++++++++++++++++++++++
 3 files changed, 1815 insertions(+)
 create mode 100644 drivers/power/supply/bq256xx_charger.c

Sebastian,

On 10/19/20 4:53 PM, Sebastian Reichel wrote:
> Hi Ricardo,
>
> On Mon, Oct 05, 2020 at 04:47:09PM -0500, Ricardo Rivera-Matos wrote:
>> The BQ256XX family of devices are highly integrated buck chargers
>> for single cell batteries.
>>
>> Signed-off-by: Ricardo Rivera-Matos <r-rivera-matos@ti.com>
>>
>> v5 - adds power_supply_put_battery_info() and devm_add_action_or_rest() calls
>>
>> v6 - implements bq256xx_remove function
> v6 unfortunately makes things worse. You might want to read some
> background information about managed resources:
>
> https://lwn.net/Articles/222860/
> https://www.kernel.org/doc/html/latest/driver-api/driver-model/devres.html
ACK
>
>> ---
>>   drivers/power/supply/Kconfig           |   11 +
>>   drivers/power/supply/Makefile          |    1 +
>>   drivers/power/supply/bq256xx_charger.c | 1803 ++++++++++++++++++++++++
>>   3 files changed, 1815 insertions(+)
>>   create mode 100644 drivers/power/supply/bq256xx_charger.c
>>
>> diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
>> index 44d3c8512fb8..87d852914bc2 100644
>> --- a/drivers/power/supply/Kconfig
>> +++ b/drivers/power/supply/Kconfig
>> @@ -618,6 +618,17 @@ config CHARGER_BQ25890
>>   	help
>>   	  Say Y to enable support for the TI BQ25890 battery charger.
>>   
>> +config CHARGER_BQ256XX
>> +	tristate "TI BQ256XX battery charger driver"
>> +	depends on I2C
>> +	depends on GPIOLIB || COMPILE_TEST
>> +	select REGMAP_I2C
>> +	help
>> +	  Say Y to enable support for the TI BQ256XX battery chargers. The
>> +	  BQ256XX family of devices are highly-integrated, switch-mode battery
>> +	  charge management and system power path management devices for single
>> +	  cell Li-ion and Li-polymer batteries.
>> +
>>   config CHARGER_SMB347
>>   	tristate "Summit Microelectronics SMB347 Battery Charger"
>>   	depends on I2C
>> diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
>> index b9644663e435..e762442c7cc6 100644
>> --- a/drivers/power/supply/Makefile
>> +++ b/drivers/power/supply/Makefile
>> @@ -83,6 +83,7 @@ obj-$(CONFIG_CHARGER_BQ24190)	+= bq24190_charger.o
>>   obj-$(CONFIG_CHARGER_BQ24257)	+= bq24257_charger.o
>>   obj-$(CONFIG_CHARGER_BQ24735)	+= bq24735-charger.o
>>   obj-$(CONFIG_CHARGER_BQ25890)	+= bq25890_charger.o
>> +obj-$(CONFIG_CHARGER_BQ256XX)	+= bq256xx_charger.o
>>   obj-$(CONFIG_CHARGER_SMB347)	+= smb347-charger.o
>>   obj-$(CONFIG_CHARGER_TPS65090)	+= tps65090-charger.o
>>   obj-$(CONFIG_CHARGER_TPS65217)	+= tps65217_charger.o
>> diff --git a/drivers/power/supply/bq256xx_charger.c b/drivers/power/supply/bq256xx_charger.c
>> new file mode 100644
>> index 000000000000..b9caec10c456
>> --- /dev/null
>> +++ b/drivers/power/supply/bq256xx_charger.c
>> @@ -0,0 +1,1803 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +// BQ256XX Battery Charger Driver
>> +// Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
>> +
>> +#include <linux/err.h>
>> +#include <linux/i2c.h>
>> +#include <linux/init.h>
>> +#include <linux/interrupt.h>
>> +#include <linux/kernel.h>
>> +#include <linux/module.h>
>> +#include <linux/gpio/consumer.h>
>> +#include <linux/power_supply.h>
>> +#include <linux/regmap.h>
>> +#include <linux/types.h>
>> +#include <linux/usb/phy.h>
>> +#include <linux/device.h>
>> +#include <linux/moduleparam.h>
>> +#include <linux/slab.h>
>> +#include <linux/acpi.h>
>> +
>> +#define BQ256XX_MANUFACTURER "Texas Instruments"
>> +
>> +#define BQ256XX_INPUT_CURRENT_LIMIT		0x00
>> +#define BQ256XX_CHARGER_CONTROL_0		0x01
>> +#define BQ256XX_CHARGE_CURRENT_LIMIT		0x02
>> +#define BQ256XX_PRECHG_AND_TERM_CURR_LIM	0x03
>> +#define BQ256XX_BATTERY_VOLTAGE_LIMIT		0x04
>> +#define BQ256XX_CHARGER_CONTROL_1		0x05
>> +#define BQ256XX_CHARGER_CONTROL_2		0x06
>> +#define BQ256XX_CHARGER_CONTROL_3		0x07
>> +#define BQ256XX_CHARGER_STATUS_0		0x08
>> +#define BQ256XX_CHARGER_STATUS_1		0x09
>> +#define BQ256XX_CHARGER_STATUS_2		0x0a
>> +#define BQ256XX_PART_INFORMATION		0x0b
>> +#define BQ256XX_CHARGER_CONTROL_4		0x0c
>> +
>> +#define BQ256XX_IINDPM_MASK		GENMASK(4, 0)
>> +#define BQ256XX_IINDPM_STEP_uA		100000
>> +#define BQ256XX_IINDPM_OFFSET_uA	100000
>> +#define BQ256XX_IINDPM_MIN_uA		100000
>> +#define BQ256XX_IINDPM_MAX_uA		3200000
>> +#define BQ256XX_IINDPM_DEF_uA		2400000
>> +
>> +#define BQ256XX_VINDPM_MASK		GENMASK(3, 0)
>> +#define BQ256XX_VINDPM_STEP_uV		100000
>> +#define BQ256XX_VINDPM_OFFSET_uV	3900000
>> +#define BQ256XX_VINDPM_MIN_uV		3900000
>> +#define BQ256XX_VINDPM_MAX_uV		5400000
>> +#define BQ256XX_VINDPM_DEF_uV		4500000
>> +
>> +#define BQ256XX_VBATREG_MASK		GENMASK(7, 3)
>> +#define BQ2560X_VBATREG_STEP_uV		32000
>> +#define BQ2560X_VBATREG_OFFSET_uV	3856000
>> +#define BQ2560X_VBATREG_MIN_uV		3856000
>> +#define BQ2560X_VBATREG_MAX_uV		4624000
>> +#define BQ2560X_VBATREG_DEF_uV		4208000
>> +#define BQ25601D_VBATREG_OFFSET_uV	3847000
>> +#define BQ25601D_VBATREG_MIN_uV		3847000
>> +#define BQ25601D_VBATREG_MAX_uV		4615000
>> +#define BQ25601D_VBATREG_DEF_uV		4199000
>> +#define BQ2561X_VBATREG_STEP_uV		10000
>> +#define BQ25611D_VBATREG_MIN_uV		3494000
>> +#define BQ25611D_VBATREG_MAX_uV		4510000
>> +#define BQ25611D_VBATREG_DEF_uV		4190000
>> +#define BQ25618_VBATREG_MIN_uV		3504000
>> +#define BQ25618_VBATREG_MAX_uV		4500000
>> +#define BQ25618_VBATREG_DEF_uV		4200000
>> +#define BQ256XX_VBATREG_BIT_SHIFT	3
>> +#define BQ2561X_VBATREG_THRESH		0x8
>> +#define BQ25611D_VBATREG_THRESH_uV	4290000
>> +#define BQ25618_VBATREG_THRESH_uV	4300000
>> +
>> +#define BQ256XX_ITERM_MASK		GENMASK(3, 0)
>> +#define BQ256XX_ITERM_STEP_uA		60000
>> +#define BQ256XX_ITERM_OFFSET_uA		60000
>> +#define BQ256XX_ITERM_MIN_uA		60000
>> +#define BQ256XX_ITERM_MAX_uA		780000
>> +#define BQ256XX_ITERM_DEF_uA		180000
>> +#define BQ25618_ITERM_STEP_uA		20000
>> +#define BQ25618_ITERM_OFFSET_uA		20000
>> +#define BQ25618_ITERM_MIN_uA		20000
>> +#define BQ25618_ITERM_MAX_uA		260000
>> +#define BQ25618_ITERM_DEF_uA		60000
>> +
>> +#define BQ256XX_IPRECHG_MASK		GENMASK(7, 4)
>> +#define BQ256XX_IPRECHG_STEP_uA		60000
>> +#define BQ256XX_IPRECHG_OFFSET_uA	60000
>> +#define BQ256XX_IPRECHG_MIN_uA		60000
>> +#define BQ256XX_IPRECHG_MAX_uA		780000
>> +#define BQ256XX_IPRECHG_DEF_uA		180000
>> +#define BQ25618_IPRECHG_STEP_uA		20000
>> +#define BQ25618_IPRECHG_OFFSET_uA	20000
>> +#define BQ25618_IPRECHG_MIN_uA		20000
>> +#define BQ25618_IPRECHG_MAX_uA		260000
>> +#define BQ25618_IPRECHG_DEF_uA		40000
>> +#define BQ256XX_IPRECHG_BIT_SHIFT	4
>> +
>> +#define BQ256XX_ICHG_MASK		GENMASK(5, 0)
>> +#define BQ256XX_ICHG_STEP_uA		60000
>> +#define BQ256XX_ICHG_MIN_uA		0
>> +#define BQ256XX_ICHG_MAX_uA		3000000
>> +#define BQ2560X_ICHG_DEF_uA		2040000
>> +#define BQ25611D_ICHG_DEF_uA		1020000
>> +#define BQ25618_ICHG_STEP_uA		20000
>> +#define BQ25618_ICHG_MIN_uA		0
>> +#define BQ25618_ICHG_MAX_uA		1500000
>> +#define BQ25618_ICHG_DEF_uA		340000
>> +#define BQ25618_ICHG_THRESH		0x3c
>> +#define BQ25618_ICHG_THRESH_uA		1180000
>> +
>> +#define BQ256XX_VBUS_STAT_MASK		GENMASK(7, 5)
>> +#define BQ256XX_VBUS_STAT_NO_INPUT	0
>> +#define BQ256XX_VBUS_STAT_USB_SDP	BIT(5)
>> +#define BQ256XX_VBUS_STAT_USB_CDP	BIT(6)
>> +#define BQ256XX_VBUS_STAT_USB_DCP	(BIT(6) | BIT(5))
>> +#define BQ256XX_VBUS_STAT_USB_OTG	(BIT(7) | BIT(6) | BIT(5))
>> +
>> +#define BQ256XX_CHRG_STAT_MASK		GENMASK(4, 3)
>> +#define BQ256XX_CHRG_STAT_NOT_CHRGING	0
>> +#define BQ256XX_CHRG_STAT_PRECHRGING	BIT(3)
>> +#define BQ256XX_CHRG_STAT_FAST_CHRGING	BIT(4)
>> +#define BQ256XX_CHRG_STAT_CHRG_TERM	(BIT(4) | BIT(3))
>> +
>> +#define BQ256XX_PG_STAT_MASK		BIT(2)
>> +#define BQ256XX_WDT_FAULT_MASK		BIT(7)
>> +#define BQ256XX_CHRG_FAULT_MASK		GENMASK(5, 4)
>> +#define BQ256XX_CHRG_FAULT_NORMAL	0
>> +#define BQ256XX_CHRG_FAULT_INPUT	BIT(4)
>> +#define BQ256XX_CHRG_FAULT_THERM	BIT(5)
>> +#define BQ256XX_CHRG_FAULT_CST_EXPIRE	(BIT(5) | BIT(4))
>> +#define BQ256XX_BAT_FAULT_MASK		BIT(3)
>> +#define BQ256XX_NTC_FAULT_MASK		GENMASK(2, 0)
>> +#define BQ256XX_NTC_FAULT_WARM		BIT(1)
>> +#define BQ256XX_NTC_FAULT_COOL		(BIT(1) | BIT(0))
>> +#define BQ256XX_NTC_FAULT_COLD		(BIT(2) | BIT(0))
>> +#define BQ256XX_NTC_FAULT_HOT		(BIT(2) | BIT(1))
>> +
>> +#define BQ256XX_NUM_WD_VAL	8
>> +#define BQ256XX_WATCHDOG_MASK	GENMASK(5, 4)
>> +#define BQ256XX_WATCHDOG_MAX	1600000
>> +#define BQ256XX_WATCHDOG_DIS	0
>> +#define BQ256XX_WDT_BIT_SHIFT	4
>> +
>> +#define BQ256XX_REG_RST		BIT(7)
>> +
>> +/**
>> + * struct bq256xx_init_data -
>> + * @ichg: fast charge current
>> + * @iindpm: input current limit
>> + * @vbatreg: charge voltage
>> + * @iterm: termination current
>> + * @iprechg: precharge current
>> + * @vindpm: input voltage limit
>> + * @ichg_max: maximum fast charge current
>> + * @vbatreg_max: maximum charge voltage
>> + */
>> +struct bq256xx_init_data {
>> +	u32 ichg;
>> +	u32 iindpm;
>> +	u32 vbatreg;
>> +	u32 iterm;
>> +	u32 iprechg;
>> +	u32 vindpm;
>> +	u32 ichg_max;
>> +	u32 vbatreg_max;
>> +};
>> +
>> +/**
>> + * struct bq256xx_state -
>> + * @vbus_stat: VBUS status according to BQ256XX_CHARGER_STATUS_0
>> + * @chrg_stat: charging status according to BQ256XX_CHARGER_STATUS_0
>> + * @online: PG status according to BQ256XX_CHARGER_STATUS_0
>> + *
>> + * @wdt_fault: watchdog fault according to BQ256XX_CHARGER_STATUS_1
>> + * @bat_fault: battery fault according to BQ256XX_CHARGER_STATUS_1
>> + * @chrg_fault: charging fault according to BQ256XX_CHARGER_STATUS_1
>> + * @ntc_fault: TS fault according to BQ256XX_CHARGER_STATUS_1
>> + */
>> +struct bq256xx_state {
>> +	u8 vbus_stat;
>> +	u8 chrg_stat;
>> +	bool online;
>> +
>> +	u8 wdt_fault;
>> +	u8 bat_fault;
>> +	u8 chrg_fault;
>> +	u8 ntc_fault;
>> +};
>> +
>> +enum bq256xx_id {
>> +	BQ25600,
>> +	BQ25600D,
>> +	BQ25601,
>> +	BQ25601D,
>> +	BQ25618,
>> +	BQ25619,
>> +	BQ25611D,
>> +};
>> +
>> +/**
>> + * struct bq256xx_device -
>> + * @client: i2c client structure
>> + * @regmap: register map structure
>> + * @dev: device structure
>> + * @lock: mutex lock structure
>> + *
>> + * @usb2_phy: usb_phy identifier
>> + * @usb3_phy: usb_phy identifier
>> + * @usb_nb: notifier block
>> + * @usb_work: usb work queue
>> + * @usb_event: usb_event code
>> + *
>> + * @model_name: i2c name string
>> + *
>> + * @init_data: initialization data
>> + * @chip_info: device variant information
>> + * @state: device status and faults
>> + * @watchdog_timer: watchdog timer value in milliseconds
>> + */
>> +struct bq256xx_device {
>> +	struct i2c_client *client;
>> +	struct device *dev;
>> +	struct power_supply *charger;
>> +	struct power_supply *battery;
>> +	struct mutex lock;
>> +	struct regmap *regmap;
>> +
>> +	struct usb_phy *usb2_phy;
>> +	struct usb_phy *usb3_phy;
>> +	struct notifier_block usb_nb;
>> +	struct work_struct usb_work;
>> +	unsigned long usb_event;
>> +
>> +	char model_name[I2C_NAME_SIZE];
>> +
>> +	struct bq256xx_init_data init_data;
>> +	const struct bq256xx_chip_info *chip_info;
>> +	struct bq256xx_state state;
>> +	int watchdog_timer;
>> +};
>> +
>> +/**
>> + * struct bq256xx_chip_info -
>> + * @model_id: device instance
>> + *
>> + * @bq256xx_regmap_config: regmap configuration struct
>> + * @bq256xx_get_ichg: pointer to instance specific get_ichg function
>> + * @bq256xx_get_iindpm: pointer to instance specific get_iindpm function
>> + * @bq256xx_get_vbatreg: pointer to instance specific get_vbatreg function
>> + * @bq256xx_get_iterm: pointer to instance specific get_iterm function
>> + * @bq256xx_get_iprechg: pointer to instance specific get_iprechg function
>> + * @bq256xx_get_vindpm: pointer to instance specific get_vindpm function
>> + *
>> + * @bq256xx_set_ichg: pointer to instance specific set_ichg function
>> + * @bq256xx_set_iindpm: pointer to instance specific set_iindpm function
>> + * @bq256xx_set_vbatreg: pointer to instance specific set_vbatreg function
>> + * @bq256xx_set_iterm: pointer to instance specific set_iterm function
>> + * @bq256xx_set_iprechg: pointer to instance specific set_iprechg function
>> + * @bq256xx_set_vindpm: pointer to instance specific set_vindpm function
>> + *
>> + * @bq256xx_def_ichg: default ichg value in microamps
>> + * @bq256xx_def_iindpm: default iindpm value in microamps
>> + * @bq256xx_def_vbatreg: default vbatreg value in microvolts
>> + * @bq256xx_def_iterm: default iterm value in microamps
>> + * @bq256xx_def_iprechg: default iprechg value in microamps
>> + * @bq256xx_def_vindpm: default vindpm value in microvolts
>> + *
>> + * @bq256xx_max_ichg: maximum charge current in microamps
>> + * @bq256xx_max_vbatreg: maximum battery regulation voltage in microvolts
>> + *
>> + * @has_usb_detect: indicates whether device has BC1.2 detection
>> + */
>> +struct bq256xx_chip_info {
>> +	int model_id;
>> +
>> +	const struct regmap_config *bq256xx_regmap_config;
>> +
>> +	int (*bq256xx_get_ichg)(struct bq256xx_device *bq);
>> +	int (*bq256xx_get_iindpm)(struct bq256xx_device *bq);
>> +	int (*bq256xx_get_vbatreg)(struct bq256xx_device *bq);
>> +	int (*bq256xx_get_iterm)(struct bq256xx_device *bq);
>> +	int (*bq256xx_get_iprechg)(struct bq256xx_device *bq);
>> +	int (*bq256xx_get_vindpm)(struct bq256xx_device *bq);
>> +
>> +	int (*bq256xx_set_ichg)(struct bq256xx_device *bq, int ichg);
>> +	int (*bq256xx_set_iindpm)(struct bq256xx_device *bq, int iindpm);
>> +	int (*bq256xx_set_vbatreg)(struct bq256xx_device *bq, int vbatreg);
>> +	int (*bq256xx_set_iterm)(struct bq256xx_device *bq, int iterm);
>> +	int (*bq256xx_set_iprechg)(struct bq256xx_device *bq, int iprechg);
>> +	int (*bq256xx_set_vindpm)(struct bq256xx_device *bq, int vindpm);
>> +
>> +	int bq256xx_def_ichg;
>> +	int bq256xx_def_iindpm;
>> +	int bq256xx_def_vbatreg;
>> +	int bq256xx_def_iterm;
>> +	int bq256xx_def_iprechg;
>> +	int bq256xx_def_vindpm;
>> +
>> +	int bq256xx_max_ichg;
>> +	int bq256xx_max_vbatreg;
>> +
>> +	bool has_usb_detect;
>> +};
>> +
>> +static int bq256xx_watchdog_time[BQ256XX_NUM_WD_VAL] = {
>> +	0, 40000, 80000, 1600000
>> +};
>> +
>> +static const int bq25611d_vbatreg_values[] = {
>> +	3494000, 3590000, 3686000, 3790000, 3894000, 3990000, 4090000, 4140000,
>> +	4190000
>> +};
>> +
>> +static const int bq25618_619_vbatreg_values[] = {
>> +	3504000, 3600000, 3696000, 3800000, 3904000, 4000000, 4100000, 4150000,
>> +	4200000
>> +};
>> +
>> +static const int bq25618_619_ichg_values[] = {
>> +	1290000, 1360000, 1430000, 1500000
>> +};
>> +
>> +static enum power_supply_usb_type bq256xx_usb_type[] = {
>> +	POWER_SUPPLY_USB_TYPE_SDP,
>> +	POWER_SUPPLY_USB_TYPE_CDP,
>> +	POWER_SUPPLY_USB_TYPE_DCP,
>> +	POWER_SUPPLY_USB_TYPE_UNKNOWN,
>> +	POWER_SUPPLY_USB_TYPE_ACA,
>> +};
>> +
>> +static int bq256xx_array_parse(int array_size, int val, const int array[])
>> +{
>> +	int i = 0;
>> +
>> +	if (val < array[i])
>> +		return i - 1;
> You probably want to return 0 here?
NACK, we want to round down to the previous value as the "special" 
values sit on the upper end of the field.
>
>> +
>> +	if (val >= array[array_size - 1])
>> +		return array_size - 1;
>> +
>> +	for (i = 1; i < array_size; i++) {
>> +		if (val == array[i])
>> +			return i;
>> +
>> +		if (val > array[i - 1] && val < array[i]) {
>> +			if (val < array[i])
>> +				return i - 1;
>> +			else
>> +				return i;
>> +		}
>> +	}
>> +	return -EINVAL;
>> +}
>> +
>> +static int bq256xx_usb_notifier(struct notifier_block *nb, unsigned long val,
>> +				void *priv)
>> +{
>> +	struct bq256xx_device *bq =
>> +			container_of(nb, struct bq256xx_device, usb_nb);
>> +
>> +	bq->usb_event = val;
>> +	queue_work(system_power_efficient_wq, &bq->usb_work);
>> +
>> +	return NOTIFY_OK;
>> +}
>> +
>> +static void bq256xx_usb_work(struct work_struct *data)
>> +{
>> +	struct bq256xx_device *bq =
>> +			container_of(data, struct bq256xx_device, usb_work);
>> +
>> +	switch (bq->usb_event) {
>> +	case USB_EVENT_ID:
>> +		break;
>> +
>> +	case USB_EVENT_NONE:
>> +		power_supply_changed(bq->charger);
>> +		break;
>> +	default:
>> +		dev_err(bq->dev, "Error switching to charger mode.\n");
>> +		break;
>> +	}
>> +}
>> +
>> +static struct reg_default bq2560x_reg_defs[] = {
>> +	{BQ256XX_INPUT_CURRENT_LIMIT, 0x17},
>> +	{BQ256XX_CHARGER_CONTROL_0, 0x1a},
>> +	{BQ256XX_CHARGE_CURRENT_LIMIT, 0xa2},
>> +	{BQ256XX_PRECHG_AND_TERM_CURR_LIM, 0x22},
>> +	{BQ256XX_BATTERY_VOLTAGE_LIMIT, 0x58},
>> +	{BQ256XX_CHARGER_CONTROL_1, 0x9f},
>> +	{BQ256XX_CHARGER_CONTROL_2, 0x66},
>> +	{BQ256XX_CHARGER_CONTROL_3, 0x4c},
>> +};
>> +
>> +static struct reg_default bq25611d_reg_defs[] = {
>> +	{BQ256XX_INPUT_CURRENT_LIMIT, 0x17},
>> +	{BQ256XX_CHARGER_CONTROL_0, 0x1a},
>> +	{BQ256XX_CHARGE_CURRENT_LIMIT, 0x91},
>> +	{BQ256XX_PRECHG_AND_TERM_CURR_LIM, 0x12},
>> +	{BQ256XX_BATTERY_VOLTAGE_LIMIT, 0x40},
>> +	{BQ256XX_CHARGER_CONTROL_1, 0x9e},
>> +	{BQ256XX_CHARGER_CONTROL_2, 0xe6},
>> +	{BQ256XX_CHARGER_CONTROL_3, 0x4c},
>> +	{BQ256XX_PART_INFORMATION, 0x54},
>> +	{BQ256XX_CHARGER_CONTROL_4, 0x75},
>> +};
>> +
>> +static struct reg_default bq25618_619_reg_defs[] = {
>> +	{BQ256XX_INPUT_CURRENT_LIMIT, 0x17},
>> +	{BQ256XX_CHARGER_CONTROL_0, 0x1a},
>> +	{BQ256XX_CHARGE_CURRENT_LIMIT, 0x91},
>> +	{BQ256XX_PRECHG_AND_TERM_CURR_LIM, 0x12},
>> +	{BQ256XX_BATTERY_VOLTAGE_LIMIT, 0x40},
>> +	{BQ256XX_CHARGER_CONTROL_1, 0x9e},
>> +	{BQ256XX_CHARGER_CONTROL_2, 0xe6},
>> +	{BQ256XX_CHARGER_CONTROL_3, 0x4c},
>> +	{BQ256XX_PART_INFORMATION, 0x2c},
>> +	{BQ256XX_CHARGER_CONTROL_4, 0x75},
>> +};
>> +
>> +static int bq256xx_get_state(struct bq256xx_device *bq,
>> +				struct bq256xx_state *state)
>> +{
>> +	unsigned int charger_status_0;
>> +	unsigned int charger_status_1;
>> +	int ret;
>> +
>> +	ret = regmap_read(bq->regmap, BQ256XX_CHARGER_STATUS_0,
>> +						&charger_status_0);
>> +	if (ret)
>> +		return ret;
>> +
>> +	ret = regmap_read(bq->regmap, BQ256XX_CHARGER_STATUS_1,
>> +						&charger_status_1);
>> +	if (ret)
>> +		return ret;
>> +
>> +	state->vbus_stat = charger_status_0 & BQ256XX_VBUS_STAT_MASK;
>> +	state->chrg_stat = charger_status_0 & BQ256XX_CHRG_STAT_MASK;
>> +	state->online = charger_status_0 & BQ256XX_PG_STAT_MASK;
>> +
>> +	state->wdt_fault = charger_status_1 & BQ256XX_WDT_FAULT_MASK;
>> +	state->bat_fault = charger_status_1 & BQ256XX_BAT_FAULT_MASK;
>> +	state->chrg_fault = charger_status_1 & BQ256XX_CHRG_FAULT_MASK;
>> +	state->ntc_fault = charger_status_1 & BQ256XX_NTC_FAULT_MASK;
>> +
>> +	return 0;
>> +}
>> +
>> +static int bq256xx_get_ichg_curr(struct bq256xx_device *bq)
>> +{
>> +	unsigned int charge_current_limit;
>> +	unsigned int ichg_reg_code;
>> +	int ret;
>> +
>> +	ret = regmap_read(bq->regmap, BQ256XX_CHARGE_CURRENT_LIMIT,
>> +						&charge_current_limit);
>> +	if (ret)
>> +		return ret;
>> +
>> +	ichg_reg_code = charge_current_limit & BQ256XX_ICHG_MASK;
>> +
>> +	return ichg_reg_code * BQ256XX_ICHG_STEP_uA;
>> +}
>> +
>> +static int bq25618_619_get_ichg_curr(struct bq256xx_device *bq)
>> +{
>> +	unsigned int charge_current_limit;
>> +	unsigned int ichg_reg_code;
>> +	int ret;
>> +
>> +	ret = regmap_read(bq->regmap, BQ256XX_CHARGE_CURRENT_LIMIT,
>> +						&charge_current_limit);
>> +	if (ret)
>> +		return ret;
>> +
>> +	ichg_reg_code = charge_current_limit & BQ256XX_ICHG_MASK;
>> +
>> +	if (ichg_reg_code < BQ25618_ICHG_THRESH)
>> +		return ichg_reg_code * BQ25618_ICHG_STEP_uA;
>> +
>> +	return bq25618_619_ichg_values[ichg_reg_code - BQ25618_ICHG_THRESH];
>> +}
>> +
>> +static int bq256xx_set_ichg_curr(struct bq256xx_device *bq, int ichg)
>> +{
>> +	unsigned int ichg_reg_code;
>> +
>> +	if (ichg < BQ256XX_ICHG_MIN_uA)
>> +		ichg = BQ256XX_ICHG_MIN_uA;
>> +	else if (ichg > bq->init_data.ichg_max)
>> +		ichg = bq->init_data.ichg_max;
> Please replace above pattern with the following in the complete
> driver:
>
> ichg = clamp(ichg, BQ256XX_ICHG_MIN_uA, bq->init_data.ichg_max);
ACK
>
>> +
>> +	ichg_reg_code = ichg / BQ256XX_ICHG_STEP_uA;
>> +
>> +	return regmap_update_bits(bq->regmap, BQ256XX_CHARGE_CURRENT_LIMIT,
>> +					BQ256XX_ICHG_MASK, ichg_reg_code);
>> +}
>> +
>> +static int bq25618_619_set_ichg_curr(struct bq256xx_device *bq, int ichg)
>> +{
>> +	int array_size = ARRAY_SIZE(bq25618_619_ichg_values);
>> +	unsigned int ichg_reg_code;
>> +
>> +	if (ichg < BQ25618_ICHG_MIN_uA)
>> +		ichg = BQ25618_ICHG_MIN_uA;
>> +	else if (ichg > bq->init_data.ichg_max)
>> +		ichg = bq->init_data.ichg_max;
>> +
>> +	if (ichg <= BQ25618_ICHG_THRESH_uA) {
>> +		ichg_reg_code = ichg / BQ25618_ICHG_STEP_uA;
>> +	} else {
>> +		ichg_reg_code = bq256xx_array_parse(array_size, ichg,
>> +			bq25618_619_ichg_values) + BQ25618_ICHG_THRESH;
>> +	}
>> +
>> +	return regmap_update_bits(bq->regmap, BQ256XX_CHARGE_CURRENT_LIMIT,
>> +					BQ256XX_ICHG_MASK, ichg_reg_code);
>> +}
>> +
>> +static int bq25618_619_get_chrg_volt(struct bq256xx_device *bq)
>> +{
>> +	unsigned int battery_volt_lim;
>> +	unsigned int vbatreg_reg_code;
>> +	int ret;
>> +
>> +	ret = regmap_read(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
>> +							&battery_volt_lim);
>> +
>> +	if (ret)
>> +		return ret;
>> +
>> +	vbatreg_reg_code = (battery_volt_lim & BQ256XX_VBATREG_MASK) >>
>> +						BQ256XX_VBATREG_BIT_SHIFT;
>> +
>> +	if (vbatreg_reg_code > BQ2561X_VBATREG_THRESH)
>> +		return ((vbatreg_reg_code - BQ2561X_VBATREG_THRESH) *
>> +					BQ2561X_VBATREG_STEP_uV) +
>> +					BQ25618_VBATREG_THRESH_uV;
>> +
>> +	return bq25618_619_vbatreg_values[vbatreg_reg_code];
>> +}
>> +
>> +static int bq25611d_get_chrg_volt(struct bq256xx_device *bq)
>> +{
>> +	unsigned int battery_volt_lim;
>> +	unsigned int vbatreg_reg_code;
>> +	int ret;
>> +
>> +	ret = regmap_read(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
>> +							&battery_volt_lim);
>> +	if (ret)
>> +		return ret;
>> +
>> +	vbatreg_reg_code = (battery_volt_lim & BQ256XX_VBATREG_MASK) >>
>> +						BQ256XX_VBATREG_BIT_SHIFT;
>> +
>> +	if (vbatreg_reg_code > BQ2561X_VBATREG_THRESH)
>> +		return ((vbatreg_reg_code - BQ2561X_VBATREG_THRESH) *
>> +					BQ2561X_VBATREG_STEP_uV) +
>> +					BQ25611D_VBATREG_THRESH_uV;
>> +
>> +	return bq25611d_vbatreg_values[vbatreg_reg_code];
>> +}
>> +
>> +static int bq2560x_get_chrg_volt(struct bq256xx_device *bq)
>> +{
>> +	unsigned int battery_volt_lim;
>> +	unsigned int vbatreg_reg_code;
>> +	int ret;
>> +
>> +	ret = regmap_read(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
>> +							&battery_volt_lim);
>> +	if (ret)
>> +		return ret;
>> +
>> +	vbatreg_reg_code = (battery_volt_lim & BQ256XX_VBATREG_MASK) >>
>> +						BQ256XX_VBATREG_BIT_SHIFT;
>> +
>> +	return (vbatreg_reg_code * BQ2560X_VBATREG_STEP_uV)
>> +					+ BQ2560X_VBATREG_OFFSET_uV;
>> +}
>> +
>> +static int bq25601d_get_chrg_volt(struct bq256xx_device *bq)
>> +{
>> +	unsigned int battery_volt_lim;
>> +	unsigned int vbatreg_reg_code;
>> +	int ret;
>> +
>> +	ret = regmap_read(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
>> +							&battery_volt_lim);
>> +	if (ret)
>> +		return ret;
>> +
>> +	vbatreg_reg_code = (battery_volt_lim & BQ256XX_VBATREG_MASK) >>
>> +						BQ256XX_VBATREG_BIT_SHIFT;
>> +
>> +	return (vbatreg_reg_code * BQ2560X_VBATREG_STEP_uV)
>> +					+ BQ25601D_VBATREG_OFFSET_uV;
>> +}
>> +
>> +static int bq25618_619_set_chrg_volt(struct bq256xx_device *bq, int vbatreg)
>> +{
>> +	int array_size = ARRAY_SIZE(bq25618_619_vbatreg_values);
>> +	unsigned int vbatreg_reg_code;
>> +
>> +	if (vbatreg < BQ25618_VBATREG_MIN_uV)
>> +		vbatreg = BQ25618_VBATREG_MIN_uV;
>> +	else if (vbatreg > bq->init_data.vbatreg_max)
>> +		vbatreg = bq->init_data.vbatreg_max;
>> +
>> +	if (vbatreg > BQ25618_VBATREG_THRESH_uV)
>> +		vbatreg_reg_code = ((vbatreg -
>> +		BQ25618_VBATREG_THRESH_uV) /
>> +		(BQ2561X_VBATREG_STEP_uV)) + BQ2561X_VBATREG_THRESH;
>> +	else {
>> +		vbatreg_reg_code = bq256xx_array_parse(array_size, vbatreg,
>> +						bq25618_619_vbatreg_values);
>> +	}
>> +
>> +	return regmap_update_bits(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
>> +				BQ256XX_VBATREG_MASK, vbatreg_reg_code <<
>> +						BQ256XX_VBATREG_BIT_SHIFT);
>> +}
>> +
>> +static int bq25611d_set_chrg_volt(struct bq256xx_device *bq, int vbatreg)
>> +{
>> +	int array_size = ARRAY_SIZE(bq25611d_vbatreg_values);
>> +	unsigned int vbatreg_reg_code;
>> +
>> +	if (vbatreg < BQ25611D_VBATREG_MIN_uV)
>> +		vbatreg = BQ25611D_VBATREG_MIN_uV;
>> +	else if (vbatreg > bq->init_data.vbatreg_max)
>> +		vbatreg = bq->init_data.vbatreg_max;
>> +
>> +	if (vbatreg > BQ25611D_VBATREG_THRESH_uV)
>> +		vbatreg_reg_code = ((vbatreg -
>> +		BQ25611D_VBATREG_THRESH_uV) /
>> +		(BQ2561X_VBATREG_STEP_uV)) + BQ2561X_VBATREG_THRESH;
>> +	else {
>> +		vbatreg_reg_code = bq256xx_array_parse(array_size, vbatreg,
>> +						bq25611d_vbatreg_values);
>> +	}
>> +
>> +	return regmap_update_bits(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
>> +				BQ256XX_VBATREG_MASK, vbatreg_reg_code <<
>> +						BQ256XX_VBATREG_BIT_SHIFT);
>> +}
>> +
>> +static int bq2560x_set_chrg_volt(struct bq256xx_device *bq, int vbatreg)
>> +{
>> +	unsigned int vbatreg_reg_code;
>> +
>> +	if (vbatreg < BQ2560X_VBATREG_MIN_uV)
>> +		vbatreg = BQ2560X_VBATREG_MIN_uV;
>> +	else if (vbatreg > bq->init_data.vbatreg_max)
>> +		vbatreg = bq->init_data.vbatreg_max;
>> +
>> +	vbatreg_reg_code = (vbatreg - BQ2560X_VBATREG_OFFSET_uV) /
>> +						BQ2560X_VBATREG_STEP_uV;
>> +
>> +	return regmap_update_bits(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
>> +				BQ256XX_VBATREG_MASK, vbatreg_reg_code <<
>> +						BQ256XX_VBATREG_BIT_SHIFT);
>> +}
>> +
>> +static int bq25601d_set_chrg_volt(struct bq256xx_device *bq, int vbatreg)
>> +{
>> +	unsigned int vbatreg_reg_code;
>> +
>> +	if (vbatreg < BQ25601D_VBATREG_MIN_uV)
>> +		vbatreg = BQ25601D_VBATREG_MIN_uV;
>> +	else if (vbatreg > bq->init_data.vbatreg_max)
>> +		vbatreg = bq->init_data.vbatreg_max;
>> +
>> +	vbatreg_reg_code = (vbatreg - BQ25601D_VBATREG_OFFSET_uV) /
>> +						BQ2560X_VBATREG_STEP_uV;
>> +
>> +	return regmap_update_bits(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
>> +				BQ256XX_VBATREG_MASK, vbatreg_reg_code <<
>> +						BQ256XX_VBATREG_BIT_SHIFT);
>> +}
>> +
>> +static int bq256xx_get_prechrg_curr(struct bq256xx_device *bq)
>> +{
>> +	unsigned int prechg_and_term_curr_lim;
>> +	unsigned int iprechg_reg_code;
>> +	int ret;
>> +
>> +	ret = regmap_read(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
>> +						&prechg_and_term_curr_lim);
>> +	if (ret)
>> +		return ret;
>> +
>> +	iprechg_reg_code = (prechg_and_term_curr_lim & BQ256XX_IPRECHG_MASK)
>> +						>> BQ256XX_IPRECHG_BIT_SHIFT;
>> +
>> +	return (iprechg_reg_code * BQ256XX_IPRECHG_STEP_uA) +
>> +						BQ256XX_IPRECHG_OFFSET_uA;
>> +}
>> +
>> +static int bq256xx_set_prechrg_curr(struct bq256xx_device *bq, int iprechg)
>> +{
>> +	unsigned int iprechg_reg_code;
>> +
>> +	if (iprechg < BQ256XX_IPRECHG_MIN_uA)
>> +		iprechg = BQ256XX_IPRECHG_MIN_uA;
>> +	else if (iprechg > BQ256XX_IPRECHG_MAX_uA)
>> +		iprechg = BQ256XX_IPRECHG_MAX_uA;
>> +
>> +	iprechg_reg_code = ((iprechg - BQ256XX_IPRECHG_OFFSET_uA) /
>> +			BQ256XX_IPRECHG_STEP_uA) << BQ256XX_IPRECHG_BIT_SHIFT;
>> +
>> +	return regmap_update_bits(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
>> +				BQ256XX_IPRECHG_MASK, iprechg_reg_code);
>> +}
>> +
>> +static int bq25618_619_get_prechrg_curr(struct bq256xx_device *bq)
>> +{
>> +	unsigned int prechg_and_term_curr_lim;
>> +	unsigned int iprechg_reg_code;
>> +	int ret;
>> +
>> +	ret = regmap_read(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
>> +						&prechg_and_term_curr_lim);
>> +	if (ret)
>> +		return ret;
>> +
>> +	iprechg_reg_code = (prechg_and_term_curr_lim & BQ256XX_IPRECHG_MASK)
>> +						>> BQ256XX_IPRECHG_BIT_SHIFT;
>> +
>> +	return (iprechg_reg_code * BQ25618_IPRECHG_STEP_uA) +
>> +						BQ25618_IPRECHG_OFFSET_uA;
>> +}
>> +
>> +static int bq25618_619_set_prechrg_curr(struct bq256xx_device *bq, int iprechg)
>> +{
>> +	unsigned int iprechg_reg_code;
>> +
>> +	if (iprechg < BQ25618_IPRECHG_MIN_uA)
>> +		iprechg = BQ25618_IPRECHG_MIN_uA;
>> +	else if (iprechg > BQ25618_IPRECHG_MAX_uA)
>> +		iprechg = BQ25618_IPRECHG_MAX_uA;
>> +
>> +	iprechg_reg_code = ((iprechg - BQ25618_IPRECHG_OFFSET_uA) /
>> +			BQ25618_IPRECHG_STEP_uA) << BQ256XX_IPRECHG_BIT_SHIFT;
>> +
>> +	return regmap_update_bits(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
>> +				BQ256XX_IPRECHG_MASK, iprechg_reg_code);
>> +}
>> +
>> +static int bq256xx_get_term_curr(struct bq256xx_device *bq)
>> +{
>> +	unsigned int prechg_and_term_curr_lim;
>> +	unsigned int iterm_reg_code;
>> +	int ret;
>> +
>> +	ret = regmap_read(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
>> +						&prechg_and_term_curr_lim);
>> +	if (ret)
>> +		return ret;
>> +
>> +	iterm_reg_code = prechg_and_term_curr_lim & BQ256XX_ITERM_MASK;
>> +
>> +	return (iterm_reg_code * BQ256XX_ITERM_STEP_uA) +
>> +						BQ256XX_ITERM_OFFSET_uA;
>> +}
>> +
>> +static int bq256xx_set_term_curr(struct bq256xx_device *bq, int iterm)
>> +{
>> +	unsigned int iterm_reg_code;
>> +
>> +	if (iterm < BQ256XX_ITERM_MIN_uA)
>> +		iterm = BQ256XX_ITERM_MIN_uA;
>> +	else if (iterm > BQ256XX_ITERM_MAX_uA)
>> +		iterm = BQ256XX_ITERM_MAX_uA;
>> +
>> +	iterm_reg_code = (iterm - BQ256XX_ITERM_OFFSET_uA) /
>> +							BQ256XX_ITERM_STEP_uA;
>> +
>> +	return regmap_update_bits(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
>> +				BQ256XX_ITERM_MASK, iterm_reg_code);
>> +}
>> +
>> +static int bq25618_619_get_term_curr(struct bq256xx_device *bq)
>> +{
>> +	unsigned int prechg_and_term_curr_lim;
>> +	unsigned int iterm_reg_code;
>> +	int ret;
>> +
>> +	ret = regmap_read(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
>> +						&prechg_and_term_curr_lim);
>> +	if (ret)
>> +		return ret;
>> +
>> +	iterm_reg_code = prechg_and_term_curr_lim & BQ256XX_ITERM_MASK;
>> +
>> +	return (iterm_reg_code * BQ25618_ITERM_STEP_uA) +
>> +						BQ25618_ITERM_OFFSET_uA;
>> +}
>> +
>> +static int bq25618_619_set_term_curr(struct bq256xx_device *bq, int iterm)
>> +{
>> +	unsigned int iterm_reg_code;
>> +
>> +	if (iterm < BQ25618_ITERM_MIN_uA)
>> +		iterm = BQ25618_ITERM_MIN_uA;
>> +	else if (iterm > BQ25618_ITERM_MAX_uA)
>> +		iterm = BQ25618_ITERM_MAX_uA;
>> +
>> +	iterm_reg_code = (iterm - BQ25618_ITERM_OFFSET_uA) /
>> +							BQ25618_ITERM_STEP_uA;
>> +
>> +	return regmap_update_bits(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
>> +				BQ256XX_ITERM_MASK, iterm_reg_code);
>> +}
>> +
>> +static int bq256xx_get_input_volt_lim(struct bq256xx_device *bq)
>> +{
>> +	unsigned int charger_control_2;
>> +	unsigned int vindpm_reg_code;
>> +	int ret;
>> +
>> +	ret = regmap_read(bq->regmap, BQ256XX_CHARGER_CONTROL_2,
>> +						&charger_control_2);
>> +	if (ret)
>> +		return ret;
>> +
>> +	vindpm_reg_code = charger_control_2 & BQ256XX_VINDPM_MASK;
>> +
>> +	return (vindpm_reg_code * BQ256XX_VINDPM_STEP_uV) +
>> +						BQ256XX_VINDPM_OFFSET_uV;
>> +}
>> +
>> +static int bq256xx_set_input_volt_lim(struct bq256xx_device *bq, int vindpm)
>> +{
>> +	unsigned int vindpm_reg_code;
>> +
>> +	if (vindpm < BQ256XX_VINDPM_MIN_uV)
>> +		vindpm = BQ256XX_VINDPM_MIN_uV;
>> +	else if (vindpm > BQ256XX_VINDPM_MAX_uV)
>> +		vindpm = BQ256XX_VINDPM_MAX_uV;
>> +
>> +	vindpm_reg_code = (vindpm - BQ256XX_VINDPM_OFFSET_uV) /
>> +							BQ256XX_VINDPM_STEP_uV;
>> +
>> +	return regmap_update_bits(bq->regmap, BQ256XX_CHARGER_CONTROL_2,
>> +					BQ256XX_VINDPM_MASK, vindpm_reg_code);
>> +}
>> +
>> +static int bq256xx_get_input_curr_lim(struct bq256xx_device *bq)
>> +{
>> +	unsigned int input_current_limit;
>> +	unsigned int iindpm_reg_code;
>> +	int ret;
>> +
>> +	ret = regmap_read(bq->regmap, BQ256XX_INPUT_CURRENT_LIMIT,
>> +						&input_current_limit);
>> +	if (ret)
>> +		return ret;
>> +
>> +	iindpm_reg_code = input_current_limit & BQ256XX_IINDPM_MASK;
>> +
>> +	return (iindpm_reg_code * BQ256XX_IINDPM_STEP_uA) +
>> +						BQ256XX_IINDPM_OFFSET_uA;
>> +}
>> +
>> +static int bq256xx_set_input_curr_lim(struct bq256xx_device *bq, int iindpm)
>> +{
>> +	unsigned int iindpm_reg_code;
>> +
>> +	if (iindpm < BQ256XX_IINDPM_MIN_uA)
>> +		iindpm = BQ256XX_IINDPM_MIN_uA;
>> +	else if (iindpm > BQ256XX_IINDPM_MAX_uA)
>> +		iindpm = BQ256XX_IINDPM_MAX_uA;
>> +
>> +	iindpm_reg_code = (iindpm - BQ256XX_IINDPM_OFFSET_uA) /
>> +							BQ256XX_IINDPM_STEP_uA;
>> +
>> +	return regmap_update_bits(bq->regmap, BQ256XX_INPUT_CURRENT_LIMIT,
>> +					BQ256XX_IINDPM_MASK, iindpm_reg_code);
>> +}
>> +
>> +static void bq256xx_charger_reset(void *data)
>> +{
>> +	struct bq256xx_device *bq = data;
>> +
>> +	regmap_update_bits(bq->regmap, BQ256XX_PART_INFORMATION,
>> +					BQ256XX_REG_RST, BQ256XX_REG_RST);
>> +}
>> +
>> +static int bq256xx_set_charger_property(struct power_supply *psy,
>> +		enum power_supply_property prop,
>> +		const union power_supply_propval *val)
>> +{
>> +	struct bq256xx_device *bq = power_supply_get_drvdata(psy);
>> +	int ret = -EINVAL;
>> +
>> +	switch (prop) {
>> +	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
>> +		ret = bq->chip_info->bq256xx_set_iindpm(bq, val->intval);
>> +		if (ret)
>> +			return ret;
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_STATUS:
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
>> +		ret = bq->chip_info->bq256xx_set_vbatreg(bq, val->intval);
>> +		if (ret)
>> +			return ret;
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
>> +		ret = bq->chip_info->bq256xx_set_ichg(bq, val->intval);
>> +		if (ret)
>> +			return ret;
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
>> +		ret = bq->chip_info->bq256xx_set_iprechg(bq, val->intval);
>> +		if (ret)
>> +			return ret;
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
>> +		ret = bq->chip_info->bq256xx_set_iterm(bq, val->intval);
>> +		if (ret)
>> +			return ret;
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
>> +		ret = bq->chip_info->bq256xx_set_vindpm(bq, val->intval);
>> +		if (ret)
>> +			return ret;
>> +		break;
>> +
>> +	default:
>> +		break;
>> +	}
>> +
>> +	return ret;
>> +}
>> +
>> +
>> +static int bq256xx_get_battery_property(struct power_supply *psy,
>> +				enum power_supply_property psp,
>> +				union power_supply_propval *val)
>> +{
>> +	struct bq256xx_device *bq = power_supply_get_drvdata(psy);
>> +
>> +	switch (psp) {
>> +	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
>> +		val->intval = bq->init_data.ichg_max;
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
>> +		val->intval = bq->init_data.vbatreg_max;
>> +		break;
>> +
>> +	default:
>> +		return -EINVAL;
>> +	}
>> +
>> +	return 0;
>> +}
>> +
>> +static int bq256xx_get_charger_property(struct power_supply *psy,
>> +				enum power_supply_property psp,
>> +				union power_supply_propval *val)
>> +{
>> +	struct bq256xx_device *bq = power_supply_get_drvdata(psy);
>> +	struct bq256xx_state state;
>> +	int ret = 0;
>> +
>> +	mutex_lock(&bq->lock);
>> +	ret = bq256xx_get_state(bq, &state);
>> +	mutex_unlock(&bq->lock);
>> +	if (ret)
>> +		return ret;
>> +
>> +	switch (psp) {
>> +	case POWER_SUPPLY_PROP_STATUS:
>> +		if (state.vbus_stat == BQ256XX_VBUS_STAT_NO_INPUT ||
>> +		    state.vbus_stat == BQ256XX_VBUS_STAT_USB_OTG)
>> +			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
>> +		else if (state.chrg_stat == BQ256XX_CHRG_STAT_NOT_CHRGING)
>> +			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
>> +		else if (state.chrg_stat == BQ256XX_CHRG_STAT_CHRG_TERM)
>> +			val->intval = POWER_SUPPLY_STATUS_FULL;
>> +		else
>> +			val->intval = POWER_SUPPLY_STATUS_CHARGING;
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_HEALTH:
>> +		val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
>> +		if (state.wdt_fault) {
>> +			val->intval =
>> +				POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE;
>> +		} else if (state.bat_fault) {
>> +			val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
>> +		} else {
>> +			switch (state.chrg_stat) {
>> +			case BQ256XX_CHRG_FAULT_INPUT:
>> +				val->intval =
>> +					POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
>> +				break;
>> +			case BQ256XX_CHRG_FAULT_THERM:
>> +				val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
>> +				break;
>> +			case BQ256XX_CHRG_FAULT_CST_EXPIRE:
>> +				val->intval =
>> +				POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
>> +				break;
>> +			default:
>> +				break;
>> +			}
>> +
>> +			switch (state.ntc_fault) {
>> +			case BQ256XX_NTC_FAULT_WARM:
>> +				val->intval = POWER_SUPPLY_HEALTH_WARM;
>> +				break;
>> +			case BQ256XX_NTC_FAULT_COOL:
>> +				val->intval = POWER_SUPPLY_HEALTH_COOL;
>> +				break;
>> +			case BQ256XX_NTC_FAULT_COLD:
>> +				val->intval = POWER_SUPPLY_HEALTH_COLD;
>> +				break;
>> +			case BQ256XX_NTC_FAULT_HOT:
>> +				val->intval = POWER_SUPPLY_HEALTH_HOT;
>> +				break;
>> +			default:
>> +				val->intval = POWER_SUPPLY_HEALTH_GOOD;
>> +				break;
>> +			}
>> +		}
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_USB_TYPE:
>> +		if (bq->chip_info->has_usb_detect) {
>> +			switch (state.vbus_stat) {
>> +			case BQ256XX_VBUS_STAT_USB_SDP:
>> +				val->intval = POWER_SUPPLY_USB_TYPE_SDP;
>> +				break;
>> +			case BQ256XX_VBUS_STAT_USB_CDP:
>> +				val->intval = POWER_SUPPLY_USB_TYPE_CDP;
>> +				break;
>> +			case BQ256XX_VBUS_STAT_USB_DCP:
>> +				val->intval = POWER_SUPPLY_USB_TYPE_DCP;
>> +				break;
>> +			case BQ256XX_VBUS_STAT_USB_OTG:
>> +				val->intval = POWER_SUPPLY_USB_TYPE_ACA;
>> +				break;
>> +			default:
>> +				val->intval = POWER_SUPPLY_USB_TYPE_UNKNOWN;
>> +				break;
>> +			}
>> +		} else {
>> +			switch (state.vbus_stat) {
>> +			case BQ256XX_VBUS_STAT_USB_SDP:
>> +				val->intval = POWER_SUPPLY_USB_TYPE_SDP;
>> +				break;
>> +			case BQ256XX_VBUS_STAT_USB_OTG:
>> +				val->intval = POWER_SUPPLY_USB_TYPE_ACA;
>> +				break;
>> +			default:
>> +				val->intval = POWER_SUPPLY_USB_TYPE_UNKNOWN;
>> +				break;
>> +			}
>> +		}
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_CHARGE_TYPE:
>> +		switch (state.chrg_stat) {
>> +		case BQ256XX_CHRG_STAT_NOT_CHRGING:
>> +			val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
>> +			break;
>> +		case BQ256XX_CHRG_STAT_PRECHRGING:
>> +			val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
>> +			break;
>> +		case BQ256XX_CHRG_STAT_FAST_CHRGING:
>> +			val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
>> +			break;
>> +		case BQ256XX_CHRG_STAT_CHRG_TERM:
>> +			val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
>> +			break;
>> +		default:
>> +			val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
>> +		}
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_MANUFACTURER:
>> +		val->strval = BQ256XX_MANUFACTURER;
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_MODEL_NAME:
>> +		val->strval = bq->model_name;
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_ONLINE:
>> +		val->intval = state.online;
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
>> +		ret = bq->chip_info->bq256xx_get_vindpm(bq);
>> +		if (ret < 0)
>> +			return ret;
>> +		val->intval = ret;
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
>> +		ret = bq->chip_info->bq256xx_get_iindpm(bq);
>> +		if (ret < 0)
>> +			return ret;
>> +		val->intval = ret;
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
>> +		ret = bq->chip_info->bq256xx_get_vbatreg(bq);
>> +		if (ret < 0)
>> +			return ret;
>> +		val->intval = ret;
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
>> +		ret = bq->chip_info->bq256xx_get_ichg(bq);
>> +		if (ret < 0)
>> +			return ret;
>> +		val->intval = ret;
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
>> +		ret = bq->chip_info->bq256xx_get_iprechg(bq);
>> +		if (ret < 0)
>> +			return ret;
>> +		val->intval = ret;
>> +		break;
>> +
>> +	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
>> +		ret = bq->chip_info->bq256xx_get_iterm(bq);
>> +		if (ret < 0)
>> +			return ret;
>> +		val->intval = ret;
>> +		break;
>> +
>> +	default:
>> +		return -EINVAL;
>> +	}
>> +
>> +	return ret;
>> +}
>> +
>> +static bool bq256xx_state_changed(struct bq256xx_device *bq,
>> +				  struct bq256xx_state *new_state)
>> +{
>> +	struct bq256xx_state old_state;
>> +
>> +	mutex_lock(&bq->lock);
>> +	old_state = bq->state;
>> +	mutex_unlock(&bq->lock);
>> +
>> +	return (old_state.vbus_stat != new_state->vbus_stat ||
>> +		old_state.chrg_stat != new_state->chrg_stat ||
>> +		old_state.online != new_state->online ||
>> +		old_state.wdt_fault != new_state->wdt_fault ||
>> +		old_state.bat_fault != new_state->bat_fault ||
>> +		old_state.chrg_fault != new_state->chrg_fault ||
>> +		old_state.ntc_fault != new_state->ntc_fault);
> it should be possible to just do this?
>
> return memcmp(old_state, new_state, sizeof(struct bq256xx_state)) != 0;
ACK
>
>> +}
>> +
>> +static irqreturn_t bq256xx_irq_handler_thread(int irq, void *private)
>> +{
>> +	struct bq256xx_device *bq = private;
>> +	struct bq256xx_state state;
>> +	int ret;
>> +
>> +	ret = bq256xx_get_state(bq, &state);
>> +	if (ret < 0)
>> +		goto irq_out;
>> +
>> +	if (!bq256xx_state_changed(bq, &state))
>> +		goto irq_out;
>> +
>> +	mutex_lock(&bq->lock);
>> +	bq->state = state;
>> +	mutex_unlock(&bq->lock);
>> +
>> +	power_supply_changed(bq->charger);
>> +
>> +irq_out:
>> +	return IRQ_HANDLED;
>> +}
>> +
>> +static enum power_supply_property bq256xx_power_supply_props[] = {
>> +	POWER_SUPPLY_PROP_MANUFACTURER,
>> +	POWER_SUPPLY_PROP_MODEL_NAME,
>> +	POWER_SUPPLY_PROP_STATUS,
>> +	POWER_SUPPLY_PROP_ONLINE,
>> +	POWER_SUPPLY_PROP_HEALTH,
>> +	POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
>> +	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
>> +	POWER_SUPPLY_PROP_CHARGE_TYPE,
>> +	POWER_SUPPLY_PROP_USB_TYPE,
>> +	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
>> +	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
>> +	POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
>> +	POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
>> +};
>> +
>> +static enum power_supply_property bq256xx_battery_props[] = {
>> +	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
>> +	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
>> +};
>> +
>> +static char *bq256xx_charger_supplied_to[] = {
>> +	"main-battery",
>> +};
>> +
>> +static int bq256xx_property_is_writeable(struct power_supply *psy,
>> +					 enum power_supply_property prop)
>> +{
>> +	switch (prop) {
>> +	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
>> +	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
>> +	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
>> +	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
>> +	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
>> +	case POWER_SUPPLY_PROP_STATUS:
>> +	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
>> +		return true;
>> +	default:
>> +		return false;
>> +	}
>> +}
>> +
>> +static const struct power_supply_desc bq256xx_power_supply_desc = {
>> +	.name = "bq256xx-charger",
>> +	.type = POWER_SUPPLY_TYPE_USB,
>> +	.usb_types = bq256xx_usb_type,
>> +	.num_usb_types = ARRAY_SIZE(bq256xx_usb_type),
>> +	.properties = bq256xx_power_supply_props,
>> +	.num_properties = ARRAY_SIZE(bq256xx_power_supply_props),
>> +	.get_property = bq256xx_get_charger_property,
>> +	.set_property = bq256xx_set_charger_property,
>> +	.property_is_writeable = bq256xx_property_is_writeable,
>> +};
>> +
>> +static struct power_supply_desc bq256xx_battery_desc = {
>> +	.name			= "bq256xx-battery",
>> +	.type			= POWER_SUPPLY_TYPE_BATTERY,
>> +	.get_property		= bq256xx_get_battery_property,
>> +	.properties		= bq256xx_battery_props,
>> +	.num_properties		= ARRAY_SIZE(bq256xx_battery_props),
>> +	.property_is_writeable	= bq256xx_property_is_writeable,
>> +};
>> +
>> +
>> +static bool bq256xx_is_volatile_reg(struct device *dev, unsigned int reg)
>> +{
>> +	switch (reg) {
>> +	case BQ256XX_INPUT_CURRENT_LIMIT:
>> +	case BQ256XX_CHARGER_STATUS_0...BQ256XX_CHARGER_STATUS_2:
>> +		return true;
>> +	default:
>> +		return false;
>> +	}
>> +}
>> +
>> +static const struct regmap_config bq25600_regmap_config = {
>> +	.reg_bits = 8,
>> +	.val_bits = 8,
>> +
>> +	.max_register = BQ256XX_PART_INFORMATION,
>> +	.reg_defaults	= bq2560x_reg_defs,
>> +	.num_reg_defaults = ARRAY_SIZE(bq2560x_reg_defs),
>> +	.cache_type = REGCACHE_RBTREE,
>> +	.volatile_reg = bq256xx_is_volatile_reg,
>> +};
>> +
>> +static const struct regmap_config bq25611d_regmap_config = {
>> +	.reg_bits = 8,
>> +	.val_bits = 8,
>> +
>> +	.max_register = BQ256XX_CHARGER_CONTROL_4,
>> +	.reg_defaults	= bq25611d_reg_defs,
>> +	.num_reg_defaults = ARRAY_SIZE(bq25611d_reg_defs),
>> +	.cache_type = REGCACHE_RBTREE,
>> +	.volatile_reg = bq256xx_is_volatile_reg,
>> +};
>> +
>> +static const struct regmap_config bq25618_619_regmap_config = {
>> +	.reg_bits = 8,
>> +	.val_bits = 8,
>> +
>> +	.max_register = BQ256XX_CHARGER_CONTROL_4,
>> +	.reg_defaults	= bq25618_619_reg_defs,
>> +	.num_reg_defaults = ARRAY_SIZE(bq25618_619_reg_defs),
>> +	.cache_type = REGCACHE_RBTREE,
> there are no holes in the register map, so it's better to use
> REGCACHE_FLAT to keep overhead small.
ACK
>
>> +	.volatile_reg = bq256xx_is_volatile_reg,
>> +};
>> +
>> +static const struct bq256xx_chip_info bq256xx_chip_info_tbl[] = {
>> +	[BQ25600] = {
>> +		.model_id = BQ25600,
>> +		.bq256xx_regmap_config = &bq25600_regmap_config,
>> +		.bq256xx_get_ichg = bq256xx_get_ichg_curr,
>> +		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
>> +		.bq256xx_get_vbatreg = bq2560x_get_chrg_volt,
>> +		.bq256xx_get_iterm = bq256xx_get_term_curr,
>> +		.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
>> +		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
>> +
>> +		.bq256xx_set_ichg = bq256xx_set_ichg_curr,
>> +		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
>> +		.bq256xx_set_vbatreg = bq2560x_set_chrg_volt,
>> +		.bq256xx_set_iterm = bq256xx_set_term_curr,
>> +		.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
>> +		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
>> +
>> +		.bq256xx_def_ichg = BQ2560X_ICHG_DEF_uA,
>> +		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
>> +		.bq256xx_def_vbatreg = BQ2560X_VBATREG_DEF_uV,
>> +		.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
>> +		.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
>> +		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
>> +
>> +		.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
>> +		.bq256xx_max_vbatreg = BQ2560X_VBATREG_MAX_uV,
>> +
>> +		.has_usb_detect = false,
>> +	},
>> +
>> +	[BQ25600D] = {
>> +		.model_id = BQ25600D,
>> +		.bq256xx_regmap_config = &bq25600_regmap_config,
>> +		.bq256xx_get_ichg = bq256xx_get_ichg_curr,
>> +		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
>> +		.bq256xx_get_vbatreg = bq2560x_get_chrg_volt,
>> +		.bq256xx_get_iterm = bq256xx_get_term_curr,
>> +		.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
>> +		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
>> +
>> +		.bq256xx_set_ichg = bq256xx_set_ichg_curr,
>> +		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
>> +		.bq256xx_set_vbatreg = bq2560x_set_chrg_volt,
>> +		.bq256xx_set_iterm = bq256xx_set_term_curr,
>> +		.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
>> +		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
>> +
>> +		.bq256xx_def_ichg = BQ2560X_ICHG_DEF_uA,
>> +		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
>> +		.bq256xx_def_vbatreg = BQ2560X_VBATREG_DEF_uV,
>> +		.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
>> +		.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
>> +		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
>> +
>> +		.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
>> +		.bq256xx_max_vbatreg = BQ2560X_VBATREG_MAX_uV,
>> +
>> +		.has_usb_detect = true,
>> +	},
>> +
>> +	[BQ25601] = {
>> +		.model_id = BQ25601,
>> +		.bq256xx_regmap_config = &bq25600_regmap_config,
>> +		.bq256xx_get_ichg = bq256xx_get_ichg_curr,
>> +		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
>> +		.bq256xx_get_vbatreg = bq2560x_get_chrg_volt,
>> +		.bq256xx_get_iterm = bq256xx_get_term_curr,
>> +		.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
>> +		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
>> +
>> +		.bq256xx_set_ichg = bq256xx_set_ichg_curr,
>> +		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
>> +		.bq256xx_set_vbatreg = bq2560x_set_chrg_volt,
>> +		.bq256xx_set_iterm = bq256xx_set_term_curr,
>> +		.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
>> +		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
>> +
>> +		.bq256xx_def_ichg = BQ2560X_ICHG_DEF_uA,
>> +		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
>> +		.bq256xx_def_vbatreg = BQ2560X_VBATREG_DEF_uV,
>> +		.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
>> +		.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
>> +		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
>> +
>> +		.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
>> +		.bq256xx_max_vbatreg = BQ2560X_VBATREG_MAX_uV,
>> +
>> +		.has_usb_detect = false,
>> +	},
>> +
>> +	[BQ25601D] = {
>> +		.model_id = BQ25601D,
>> +		.bq256xx_regmap_config = &bq25600_regmap_config,
>> +		.bq256xx_get_ichg = bq256xx_get_ichg_curr,
>> +		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
>> +		.bq256xx_get_vbatreg = bq25601d_get_chrg_volt,
>> +		.bq256xx_get_iterm = bq256xx_get_term_curr,
>> +		.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
>> +		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
>> +
>> +		.bq256xx_set_ichg = bq256xx_set_ichg_curr,
>> +		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
>> +		.bq256xx_set_vbatreg = bq25601d_set_chrg_volt,
>> +		.bq256xx_set_iterm = bq256xx_set_term_curr,
>> +		.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
>> +		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
>> +
>> +		.bq256xx_def_ichg = BQ2560X_ICHG_DEF_uA,
>> +		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
>> +		.bq256xx_def_vbatreg = BQ2560X_VBATREG_DEF_uV,
>> +		.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
>> +		.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
>> +		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
>> +
>> +		.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
>> +		.bq256xx_max_vbatreg = BQ2560X_VBATREG_MAX_uV,
>> +
>> +		.has_usb_detect = true,
>> +	},
>> +
>> +	[BQ25611D] = {
>> +		.model_id = BQ25611D,
>> +		.bq256xx_regmap_config = &bq25611d_regmap_config,
>> +		.bq256xx_get_ichg = bq256xx_get_ichg_curr,
>> +		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
>> +		.bq256xx_get_vbatreg = bq25611d_get_chrg_volt,
>> +		.bq256xx_get_iterm = bq256xx_get_term_curr,
>> +		.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
>> +		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
>> +
>> +		.bq256xx_set_ichg = bq256xx_set_ichg_curr,
>> +		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
>> +		.bq256xx_set_vbatreg = bq25611d_set_chrg_volt,
>> +		.bq256xx_set_iterm = bq256xx_set_term_curr,
>> +		.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
>> +		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
>> +
>> +		.bq256xx_def_ichg = BQ25611D_ICHG_DEF_uA,
>> +		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
>> +		.bq256xx_def_vbatreg = BQ25611D_VBATREG_DEF_uV,
>> +		.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
>> +		.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
>> +		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
>> +
>> +		.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
>> +		.bq256xx_max_vbatreg = BQ25611D_VBATREG_MAX_uV,
>> +
>> +		.has_usb_detect = true,
>> +	},
>> +
>> +	[BQ25618] = {
>> +		.model_id = BQ25618,
>> +		.bq256xx_regmap_config = &bq25618_619_regmap_config,
>> +		.bq256xx_get_ichg = bq25618_619_get_ichg_curr,
>> +		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
>> +		.bq256xx_get_vbatreg = bq25618_619_get_chrg_volt,
>> +		.bq256xx_get_iterm = bq25618_619_get_term_curr,
>> +		.bq256xx_get_iprechg = bq25618_619_get_prechrg_curr,
>> +		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
>> +
>> +		.bq256xx_set_ichg = bq25618_619_set_ichg_curr,
>> +		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
>> +		.bq256xx_set_vbatreg = bq25618_619_set_chrg_volt,
>> +		.bq256xx_set_iterm = bq25618_619_set_term_curr,
>> +		.bq256xx_set_iprechg = bq25618_619_set_prechrg_curr,
>> +		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
>> +
>> +		.bq256xx_def_ichg = BQ25618_ICHG_DEF_uA,
>> +		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
>> +		.bq256xx_def_vbatreg = BQ25618_VBATREG_DEF_uV,
>> +		.bq256xx_def_iterm = BQ25618_ITERM_DEF_uA,
>> +		.bq256xx_def_iprechg = BQ25618_IPRECHG_DEF_uA,
>> +		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
>> +
>> +		.bq256xx_max_ichg = BQ25618_ICHG_MAX_uA,
>> +		.bq256xx_max_vbatreg = BQ25618_VBATREG_MAX_uV,
>> +
>> +		.has_usb_detect = false,
>> +	},
>> +
>> +	[BQ25619] = {
>> +		.model_id = BQ25619,
>> +		.bq256xx_regmap_config = &bq25618_619_regmap_config,
>> +		.bq256xx_get_ichg = bq25618_619_get_ichg_curr,
>> +		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
>> +		.bq256xx_get_vbatreg = bq25618_619_get_chrg_volt,
>> +		.bq256xx_get_iterm = bq25618_619_get_term_curr,
>> +		.bq256xx_get_iprechg = bq25618_619_get_prechrg_curr,
>> +		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
>> +
>> +		.bq256xx_set_ichg = bq25618_619_set_ichg_curr,
>> +		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
>> +		.bq256xx_set_vbatreg = bq25618_619_set_chrg_volt,
>> +		.bq256xx_set_iterm = bq25618_619_set_term_curr,
>> +		.bq256xx_set_iprechg = bq25618_619_set_prechrg_curr,
>> +		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
>> +
>> +		.bq256xx_def_ichg = BQ25618_ICHG_DEF_uA,
>> +		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
>> +		.bq256xx_def_vbatreg = BQ25618_VBATREG_DEF_uV,
>> +		.bq256xx_def_iterm = BQ25618_ITERM_DEF_uA,
>> +		.bq256xx_def_iprechg = BQ25618_IPRECHG_DEF_uA,
>> +		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
>> +
>> +		.bq256xx_max_ichg = BQ25618_ICHG_MAX_uA,
>> +		.bq256xx_max_vbatreg = BQ25618_VBATREG_MAX_uV,
>> +
>> +		.has_usb_detect = false,
>> +	},
>> +};
>> +
>> +static int bq256xx_power_supply_init(struct bq256xx_device *bq,
>> +							struct device *dev)
>> +{
>> +	struct power_supply_config psy_cfg = { .drv_data = bq,
>> +						.of_node = dev->of_node, };
>> +
>> +	psy_cfg.supplied_to = bq256xx_charger_supplied_to;
>> +	psy_cfg.num_supplicants = ARRAY_SIZE(bq256xx_charger_supplied_to);
> Why do you initialize the supplied_to information?
> This should be initialized from DT.
ACK
>
>> +	bq->charger = devm_power_supply_register(bq->dev,
>> +						 &bq256xx_power_supply_desc,
>> +						 &psy_cfg);
>> +	if (IS_ERR(bq->charger))
>> +		return -EINVAL;
>> +
>> +	bq->battery = devm_power_supply_register(bq->dev,
>> +						      &bq256xx_battery_desc,
>> +						      &psy_cfg);
>> +	if (IS_ERR(bq->battery))
>> +		return -EINVAL;
>> +
>> +	return 0;
>> +}
>> +
>> +static int bq256xx_hw_init(struct bq256xx_device *bq)
>> +{
>> +	struct power_supply_battery_info bat_info = { };
>> +	int wd_reg_val = BQ256XX_WATCHDOG_DIS;
>> +	int ret = 0;
>> +	int i;
>> +
>> +	for (i = 0; i < BQ256XX_NUM_WD_VAL; i++) {
>> +		if (bq->watchdog_timer > bq256xx_watchdog_time[i] &&
>> +		    bq->watchdog_timer < bq256xx_watchdog_time[i + 1])
>> +			wd_reg_val = i;
>> +	}
>> +	ret = regmap_update_bits(bq->regmap, BQ256XX_CHARGER_CONTROL_1,
>> +				 BQ256XX_WATCHDOG_MASK, wd_reg_val <<
>> +						BQ256XX_WDT_BIT_SHIFT);
>> +
>> +	ret = power_supply_get_battery_info(bq->charger, &bat_info);
>> +	if (ret) {
>> +		dev_warn(bq->dev, "battery info missing, default values will be applied\n");
>> +
>> +		bat_info.constant_charge_current_max_ua =
>> +				bq->chip_info->bq256xx_def_ichg;
>> +
>> +		bat_info.constant_charge_voltage_max_uv =
>> +				bq->chip_info->bq256xx_def_vbatreg;
>> +
>> +		bat_info.precharge_current_ua =
>> +				bq->chip_info->bq256xx_def_iprechg;
>> +
>> +		bat_info.charge_term_current_ua =
>> +				bq->chip_info->bq256xx_def_iterm;
>> +
>> +		bq->init_data.ichg_max =
>> +				bq->chip_info->bq256xx_max_ichg;
>> +
>> +		bq->init_data.vbatreg_max =
>> +				bq->chip_info->bq256xx_max_vbatreg;
>> +	} else {
>> +		bq->init_data.ichg_max =
>> +			bat_info.constant_charge_current_max_ua;
>> +
>> +		bq->init_data.vbatreg_max =
>> +			bat_info.constant_charge_voltage_max_uv;
>> +	}
>> +
>> +	ret = bq->chip_info->bq256xx_set_vindpm(bq, bq->init_data.vindpm);
>> +	if (ret)
>> +		goto err_out;
>> +
>> +	ret = bq->chip_info->bq256xx_set_iindpm(bq, bq->init_data.iindpm);
>> +	if (ret)
>> +		goto err_out;
>> +
>> +	ret = bq->chip_info->bq256xx_set_ichg(bq,
>> +				bat_info.constant_charge_current_max_ua);
>> +	if (ret)
>> +		goto err_out;
>> +
>> +	ret = bq->chip_info->bq256xx_set_iprechg(bq,
>> +				bat_info.precharge_current_ua);
>> +	if (ret)
>> +		goto err_out;
>> +
>> +	ret = bq->chip_info->bq256xx_set_vbatreg(bq,
>> +				bat_info.constant_charge_voltage_max_uv);
>> +	if (ret)
>> +		goto err_out;
>> +
>> +	ret = bq->chip_info->bq256xx_set_iterm(bq,
>> +				bat_info.charge_term_current_ua);
>> +	if (ret)
>> +		goto err_out;
>> +
>> +	power_supply_put_battery_info(bq->charger, &bat_info);
>> +
>> +	return 0;
>> +
>> +err_out:
>> +	return ret;
>> +}
>> +
>> +static int bq256xx_parse_dt(struct bq256xx_device *bq)
>> +{
>> +	int ret = 0;
>> +
>> +	ret = device_property_read_u32(bq->dev, "ti,watchdog-timeout-ms",
>> +				       &bq->watchdog_timer);
>> +	if (ret)
>> +		bq->watchdog_timer = BQ256XX_WATCHDOG_DIS;
>> +
>> +	if (bq->watchdog_timer > BQ256XX_WATCHDOG_MAX ||
>> +	    bq->watchdog_timer < BQ256XX_WATCHDOG_DIS)
>> +		return -EINVAL;
>> +
>> +	ret = device_property_read_u32(bq->dev,
>> +				       "input-voltage-limit-microvolt",
>> +				       &bq->init_data.vindpm);
>> +	if (ret)
>> +		bq->init_data.vindpm = bq->chip_info->bq256xx_def_vindpm;
>> +
>> +	ret = device_property_read_u32(bq->dev,
>> +				       "input-current-limit-microamp",
>> +				       &bq->init_data.iindpm);
>> +	if (ret)
>> +		bq->init_data.iindpm = bq->chip_info->bq256xx_def_iindpm;
>> +
>> +	return 0;
>> +}
>> +
>> +static int bq256xx_probe(struct i2c_client *client,
>> +			 const struct i2c_device_id *id)
>> +{
>> +	struct device *dev = &client->dev;
>> +	struct bq256xx_device *bq;
>> +	int ret;
>> +
>> +	bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
>> +	if (!bq)
>> +		return -ENOMEM;
>> +
>> +	bq->client = client;
>> +	bq->dev = dev;
>> +	bq->chip_info = &bq256xx_chip_info_tbl[id->driver_data];
>> +
>> +	mutex_init(&bq->lock);
>> +
>> +	strncpy(bq->model_name, id->name, I2C_NAME_SIZE);
>> +
>> +	bq->regmap = devm_regmap_init_i2c(client,
>> +					bq->chip_info->bq256xx_regmap_config);
>> +
>> +	if (IS_ERR(bq->regmap)) {
>> +		dev_err(dev, "Failed to allocate register map\n");
>> +		return PTR_ERR(bq->regmap);
>> +	}
>> +
>> +	i2c_set_clientdata(client, bq);
>> +
>> +	ret = bq256xx_parse_dt(bq);
>> +	if (ret) {
>> +		dev_err(dev, "Failed to read device tree properties%d\n", ret);
>> +		return ret;
>> +	}
>> +
>> +	/* OTG reporting */
>> +	bq->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
>> +	if (!IS_ERR_OR_NULL(bq->usb2_phy)) {
>> +		INIT_WORK(&bq->usb_work, bq256xx_usb_work);
>> +		bq->usb_nb.notifier_call = bq256xx_usb_notifier;
>> +		usb_register_notifier(bq->usb2_phy, &bq->usb_nb);
>> +	}
>> +
>> +	bq->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);
>> +	if (!IS_ERR_OR_NULL(bq->usb3_phy)) {
>> +		INIT_WORK(&bq->usb_work, bq256xx_usb_work);
>> +		bq->usb_nb.notifier_call = bq256xx_usb_notifier;
>> +		usb_register_notifier(bq->usb3_phy, &bq->usb_nb);
>> +	}
>> +
>> +	if (client->irq) {
>> +		ret = devm_request_threaded_irq(dev, client->irq, NULL,
>> +						bq256xx_irq_handler_thread,
>> +						IRQF_TRIGGER_FALLING |
>> +						IRQF_ONESHOT,
>> +						dev_name(&client->dev), bq);
>> +		if (ret)
>> +			goto error_out;
>> +	}
>> +
>> +	ret = devm_add_action_or_reset(dev, bq256xx_charger_reset, bq);
>> +	if (ret)
>> +		goto error_out;
>> +
>> +	ret = bq256xx_power_supply_init(bq, dev);
>> +	if (ret) {
>> +		dev_err(dev, "Failed to register power supply\n");
>> +		goto error_out;
>> +	}
>> +
>> +	ret = bq256xx_hw_init(bq);
>> +	if (ret) {
>> +		dev_err(dev, "Cannot initialize the chip.\n");
>> +		goto error_out;
>> +	}
>> +
>> +	return ret;
>> +
>> +error_out:
>> +	if (!IS_ERR_OR_NULL(bq->usb2_phy))
>> +		usb_unregister_notifier(bq->usb2_phy, &bq->usb_nb);
>> +
>> +	if (!IS_ERR_OR_NULL(bq->usb3_phy))
>> +		usb_unregister_notifier(bq->usb3_phy, &bq->usb_nb);
>> +	return ret;
>> +}
>> +
>> +static int bq256xx_remove(struct i2c_client *client)
>> +{
>> +	struct bq256xx_device *bq = i2c_get_clientdata(client);
>> +
>> +	power_supply_unregister(bq->charger);
> You are registering the charger with devm_power_supply_register,
> so this is not needed and actually wrong (results in double free).
ACK
>
>> +	if (!IS_ERR_OR_NULL(bq->usb2_phy))
>> +		usb_unregister_notifier(bq->usb2_phy, &bq->usb_nb);
>> +
>> +	if (!IS_ERR_OR_NULL(bq->usb3_phy))
>> +		usb_unregister_notifier(bq->usb3_phy, &bq->usb_nb);
> Do this via devm_add_action_or_reset, so that we do not need
> the code twice (in probe error path and on module removal).
> Alternatively implement devm_usb_register_notifier() and use
> that instead of usb_register_notifier().
ACK
>
>> +	bq256xx_charger_reset(bq);
> This is also already handled automatically via the call you
> registered with devm_add_action_or_reset.
ACK
>
>> +	return 0;
>> +}
>> +
>> +static const struct i2c_device_id bq256xx_i2c_ids[] = {
>> +	{ "bq25600", BQ25600 },
>> +	{ "bq25600d", BQ25600D },
>> +	{ "bq25601", BQ25601 },
>> +	{ "bq25601d", BQ25601D },
>> +	{ "bq25611d", BQ25611D },
>> +	{ "bq25618", BQ25618 },
>> +	{ "bq25619", BQ25619 },
>> +	{},
>> +};
>> +MODULE_DEVICE_TABLE(i2c, bq256xx_i2c_ids);
>> +
>> +static const struct of_device_id bq256xx_of_match[] = {
>> +	{ .compatible = "ti,bq25600", .data = (void *)BQ25600 },
>> +	{ .compatible = "ti,bq25600d", .data = (void *)BQ25600D },
>> +	{ .compatible = "ti,bq25601", .data = (void *)BQ25601 },
>> +	{ .compatible = "ti,bq25601d", .data = (void *)BQ25601D },
>> +	{ .compatible = "ti,bq25611d", .data = (void *)BQ25611D },
>> +	{ .compatible = "ti,bq25618", .data = (void *)BQ25618 },
>> +	{ .compatible = "ti,bq25619", .data = (void *)BQ25619 },
>> +	{ },
>> +};
>> +MODULE_DEVICE_TABLE(of, bq256xx_of_match);
>> +
>> +static const struct acpi_device_id bq256xx_acpi_match[] = {
>> +	{ "bq25600", BQ25600 },
>> +	{ "bq25600d", BQ25600D },
>> +	{ "bq25601", BQ25601 },
>> +	{ "bq25601d", BQ25601D },
>> +	{ "bq25611d", BQ25611D },
>> +	{ "bq25618", BQ25618 },
>> +	{ "bq25619", BQ25619 },
>> +	{},
>> +};
>> +MODULE_DEVICE_TABLE(acpi, bq256xx_acpi_match);
>> +
>> +static struct i2c_driver bq256xx_driver = {
>> +	.driver = {
>> +		.name = "bq256xx-charger",
>> +		.of_match_table = bq256xx_of_match,
>> +		.acpi_match_table = ACPI_PTR(bq256xx_acpi_match),
>> +	},
>> +	.probe = bq256xx_probe,
>> +	.remove = bq256xx_remove,
>> +	.id_table = bq256xx_i2c_ids,
>> +};
>> +module_i2c_driver(bq256xx_driver);
>> +
>> +MODULE_AUTHOR("Ricardo Rivera-Matos <r-rivera-matos@ti.com>");
>> +MODULE_DESCRIPTION("bq256xx charger driver");
>> +MODULE_LICENSE("GPL v2");
>> -- 
>> 2.28.0
>>
Ricardo