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From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Robert Baldyga <r.baldyga@samsung.com>
Cc: lee.jones@linaro.org, sameo@linux.intel.com,
	myungjoo.ham@samsung.com, cw00.choi@samsung.com,
	cooloney@gmail.com, rpurdie@rpsys.net, sre@kernel.org,
	dbaryshkov@gmail.com, dwmw2@infradead.org, lgirdwood@gmail.com,
	broonie@kernel.org, a.zummo@towertech.it,
	paul.gortmaker@windriver.com, sachin.kamat@linaro.org,
	k.kozlowski@samsung.com, linux-kernel@vger.kernel.org,
	linux-input@vger.kernel.org, linux-leds@vger.kernel.org,
	linux-pm@vger.kernel.org, rtc-linux@googlegroups.com
Subject: Re: [PATCH v5 1/3] mfd: max8997: use regmap to access registers
Date: Thu, 29 Jan 2015 10:01:38 -0800	[thread overview]
Message-ID: <20150129180138.GA26625@dtor-ws> (raw)
In-Reply-To: <1415776996-11569-2-git-send-email-r.baldyga@samsung.com>

On Wed, Nov 12, 2014 at 08:23:14AM +0100, Robert Baldyga wrote:
> This patch modifies max8997 driver and each associated function driver,
> to use regmap instead of operating directly on i2c bus. It will allow to
> simplify IRQ handling using regmap-irq.
> 
> Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> 
> [For extcon part]
> Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
> 
> [For leds part]
> Acked-by: Bryan Wu <cooloney@gmail.com>
> 
> [For the mfd part]
> Acked-by: Lee Jones <lee.jones@linaro.org>

For input part:

Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>


Thanks.

> ---
>  drivers/extcon/extcon-max8997.c     |  31 ++++----
>  drivers/input/misc/max8997_haptic.c |  34 +++++----
>  drivers/leds/leds-max8997.c         |  13 ++--
>  drivers/mfd/Kconfig                 |   1 +
>  drivers/mfd/max8997-irq.c           |  64 +++++++---------
>  drivers/mfd/max8997.c               | 141 ++++++++++++++++--------------------
>  drivers/power/max8997_charger.c     |  33 +++++----
>  drivers/regulator/max8997.c         |  87 +++++++++++-----------
>  drivers/rtc/rtc-max8997.c           |  56 +++++++-------
>  include/linux/mfd/max8997-private.h |  17 ++---
>  10 files changed, 228 insertions(+), 249 deletions(-)
> 
> diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
> index 75e501c..2aafd5b 100644
> --- a/drivers/extcon/extcon-max8997.c
> +++ b/drivers/extcon/extcon-max8997.c
> @@ -27,6 +27,7 @@
>  #include <linux/mfd/max8997-private.h>
>  #include <linux/extcon.h>
>  #include <linux/irqdomain.h>
> +#include <linux/regmap.h>
>  
>  #define	DEV_NAME			"max8997-muic"
>  #define	DELAY_MS_DEFAULT		20000		/* unit: millisecond */
> @@ -116,7 +117,7 @@ enum max8997_muic_charger_type {
>  
>  struct max8997_muic_info {
>  	struct device *dev;
> -	struct i2c_client *muic;
> +	struct max8997_dev *max8997;
>  	struct extcon_dev *edev;
>  	int prev_cable_type;
>  	int prev_chg_type;
> @@ -190,10 +191,10 @@ static int max8997_muic_set_debounce_time(struct max8997_muic_info *info,
>  	case ADC_DEBOUNCE_TIME_10MS:
>  	case ADC_DEBOUNCE_TIME_25MS:
>  	case ADC_DEBOUNCE_TIME_38_62MS:
> -		ret = max8997_update_reg(info->muic,
> +		ret = regmap_update_bits(info->max8997->regmap_muic,
>  					  MAX8997_MUIC_REG_CONTROL3,
> -					  time << CONTROL3_ADCDBSET_SHIFT,
> -					  CONTROL3_ADCDBSET_MASK);
> +					  CONTROL3_ADCDBSET_MASK,
> +					  time << CONTROL3_ADCDBSET_SHIFT);
>  		if (ret) {
>  			dev_err(info->dev, "failed to set ADC debounce time\n");
>  			return ret;
> @@ -228,8 +229,8 @@ static int max8997_muic_set_path(struct max8997_muic_info *info,
>  	else
>  		ctrl1 = CONTROL1_SW_OPEN;
>  
> -	ret = max8997_update_reg(info->muic,
> -			MAX8997_MUIC_REG_CONTROL1, ctrl1, COMP_SW_MASK);
> +	ret = regmap_update_bits(info->max8997->regmap_muic,
> +			MAX8997_MUIC_REG_CONTROL1, COMP_SW_MASK, ctrl1);
>  	if (ret < 0) {
>  		dev_err(info->dev, "failed to update MUIC register\n");
>  		return ret;
> @@ -240,9 +241,9 @@ static int max8997_muic_set_path(struct max8997_muic_info *info,
>  	else
>  		ctrl2 |= CONTROL2_LOWPWR_MASK;	/* LowPwr=1, CPEn=0 */
>  
> -	ret = max8997_update_reg(info->muic,
> -			MAX8997_MUIC_REG_CONTROL2, ctrl2,
> -			CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
> +	ret = regmap_update_bits(info->max8997->regmap_muic,
> +			MAX8997_MUIC_REG_CONTROL2,
> +			CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK, ctrl2);
>  	if (ret < 0) {
>  		dev_err(info->dev, "failed to update MUIC register\n");
>  		return ret;
> @@ -543,8 +544,8 @@ static void max8997_muic_irq_work(struct work_struct *work)
>  		if (info->irq == muic_irqs[i].virq)
>  			irq_type = muic_irqs[i].irq;
>  
> -	ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
> -				2, info->status);
> +	ret = regmap_bulk_read(info->max8997->regmap_muic,
> +				MAX8997_MUIC_REG_STATUS1, info->status, 2);
>  	if (ret) {
>  		dev_err(info->dev, "failed to read muic register\n");
>  		mutex_unlock(&info->mutex);
> @@ -605,8 +606,8 @@ static int max8997_muic_detect_dev(struct max8997_muic_info *info)
>  	mutex_lock(&info->mutex);
>  
>  	/* Read STATUSx register to detect accessory */
> -	ret = max8997_bulk_read(info->muic,
> -			MAX8997_MUIC_REG_STATUS1, 2, info->status);
> +	ret = regmap_bulk_read(info->max8997->regmap_muic,
> +			MAX8997_MUIC_REG_STATUS1, info->status, 2);
>  	if (ret) {
>  		dev_err(info->dev, "failed to read MUIC register\n");
>  		mutex_unlock(&info->mutex);
> @@ -665,7 +666,7 @@ static int max8997_muic_probe(struct platform_device *pdev)
>  		return -ENOMEM;
>  
>  	info->dev = &pdev->dev;
> -	info->muic = max8997->muic;
> +	info->max8997 = max8997;
>  
>  	platform_set_drvdata(pdev, info);
>  	mutex_init(&info->mutex);
> @@ -717,7 +718,7 @@ static int max8997_muic_probe(struct platform_device *pdev)
>  
>  		/* Initialize registers according to platform data */
>  		for (i = 0; i < muic_pdata->num_init_data; i++) {
> -			max8997_write_reg(info->muic,
> +			regmap_write(info->max8997->regmap_muic,
>  					muic_pdata->init_data[i].addr,
>  					muic_pdata->init_data[i].data);
>  		}
> diff --git a/drivers/input/misc/max8997_haptic.c b/drivers/input/misc/max8997_haptic.c
> index a363ebb..53b32b5 100644
> --- a/drivers/input/misc/max8997_haptic.c
> +++ b/drivers/input/misc/max8997_haptic.c
> @@ -31,6 +31,7 @@
>  #include <linux/mfd/max8997-private.h>
>  #include <linux/mfd/max8997.h>
>  #include <linux/regulator/consumer.h>
> +#include <linux/regmap.h>
>  
>  /* Haptic configuration 2 register */
>  #define MAX8997_MOTOR_TYPE_SHIFT	7
> @@ -45,7 +46,7 @@
>  
>  struct max8997_haptic {
>  	struct device *dev;
> -	struct i2c_client *client;
> +	struct max8997_dev *max8997;
>  	struct input_dev *input_dev;
>  	struct regulator *regulator;
>  
> @@ -86,19 +87,19 @@ static int max8997_haptic_set_duty_cycle(struct max8997_haptic *chip)
>  		}
>  		switch (chip->internal_mode_pattern) {
>  		case 0:
> -			max8997_write_reg(chip->client,
> +			regmap_write(chip->max8997->regmap_haptic,
>  				MAX8997_HAPTIC_REG_SIGPWMDC1, duty_index);
>  			break;
>  		case 1:
> -			max8997_write_reg(chip->client,
> +			regmap_write(chip->max8997->regmap_haptic,
>  				MAX8997_HAPTIC_REG_SIGPWMDC2, duty_index);
>  			break;
>  		case 2:
> -			max8997_write_reg(chip->client,
> +			regmap_write(chip->max8997->regmap_haptic,
>  				MAX8997_HAPTIC_REG_SIGPWMDC3, duty_index);
>  			break;
>  		case 3:
> -			max8997_write_reg(chip->client,
> +			regmap_write(chip->max8997->regmap_haptic,
>  				MAX8997_HAPTIC_REG_SIGPWMDC4, duty_index);
>  			break;
>  		default:
> @@ -115,50 +116,51 @@ static void max8997_haptic_configure(struct max8997_haptic *chip)
>  	value = chip->type << MAX8997_MOTOR_TYPE_SHIFT |
>  		chip->enabled << MAX8997_ENABLE_SHIFT |
>  		chip->mode << MAX8997_MODE_SHIFT | chip->pwm_divisor;
> -	max8997_write_reg(chip->client, MAX8997_HAPTIC_REG_CONF2, value);
> +	regmap_write(chip->max8997->regmap_haptic,
> +		MAX8997_HAPTIC_REG_CONF2, value);
>  
>  	if (chip->mode == MAX8997_INTERNAL_MODE && chip->enabled) {
>  		value = chip->internal_mode_pattern << MAX8997_CYCLE_SHIFT |
>  			chip->internal_mode_pattern << MAX8997_SIG_PERIOD_SHIFT |
>  			chip->internal_mode_pattern << MAX8997_SIG_DUTY_SHIFT |
>  			chip->internal_mode_pattern << MAX8997_PWM_DUTY_SHIFT;
> -		max8997_write_reg(chip->client,
> +		regmap_write(chip->max8997->regmap_haptic,
>  			MAX8997_HAPTIC_REG_DRVCONF, value);
>  
>  		switch (chip->internal_mode_pattern) {
>  		case 0:
>  			value = chip->pattern_cycle << 4;
> -			max8997_write_reg(chip->client,
> +			regmap_write(chip->max8997->regmap_haptic,
>  				MAX8997_HAPTIC_REG_CYCLECONF1, value);
>  			value = chip->pattern_signal_period;
> -			max8997_write_reg(chip->client,
> +			regmap_write(chip->max8997->regmap_haptic,
>  				MAX8997_HAPTIC_REG_SIGCONF1, value);
>  			break;
>  
>  		case 1:
>  			value = chip->pattern_cycle;
> -			max8997_write_reg(chip->client,
> +			regmap_write(chip->max8997->regmap_haptic,
>  				MAX8997_HAPTIC_REG_CYCLECONF1, value);
>  			value = chip->pattern_signal_period;
> -			max8997_write_reg(chip->client,
> +			regmap_write(chip->max8997->regmap_haptic,
>  				MAX8997_HAPTIC_REG_SIGCONF2, value);
>  			break;
>  
>  		case 2:
>  			value = chip->pattern_cycle << 4;
> -			max8997_write_reg(chip->client,
> +			regmap_write(chip->max8997->regmap_haptic,
>  				MAX8997_HAPTIC_REG_CYCLECONF2, value);
>  			value = chip->pattern_signal_period;
> -			max8997_write_reg(chip->client,
> +			regmap_write(chip->max8997->regmap_haptic,
>  				MAX8997_HAPTIC_REG_SIGCONF3, value);
>  			break;
>  
>  		case 3:
>  			value = chip->pattern_cycle;
> -			max8997_write_reg(chip->client,
> +			regmap_write(chip->max8997->regmap_haptic,
>  				MAX8997_HAPTIC_REG_CYCLECONF2, value);
>  			value = chip->pattern_signal_period;
> -			max8997_write_reg(chip->client,
> +			regmap_write(chip->max8997->regmap_haptic,
>  				MAX8997_HAPTIC_REG_SIGCONF4, value);
>  			break;
>  
> @@ -277,7 +279,7 @@ static int max8997_haptic_probe(struct platform_device *pdev)
>  	INIT_WORK(&chip->work, max8997_haptic_play_effect_work);
>  	mutex_init(&chip->mutex);
>  
> -	chip->client = iodev->haptic;
> +	chip->max8997 = iodev;
>  	chip->dev = &pdev->dev;
>  	chip->input_dev = input_dev;
>  	chip->pwm_period = haptic_pdata->pwm_period;
> diff --git a/drivers/leds/leds-max8997.c b/drivers/leds/leds-max8997.c
> index 607bc27..49bb128 100644
> --- a/drivers/leds/leds-max8997.c
> +++ b/drivers/leds/leds-max8997.c
> @@ -18,6 +18,7 @@
>  #include <linux/mfd/max8997.h>
>  #include <linux/mfd/max8997-private.h>
>  #include <linux/platform_device.h>
> +#include <linux/regmap.h>
>  
>  #define MAX8997_LED_FLASH_SHIFT			3
>  #define MAX8997_LED_FLASH_CUR_MASK		0xf8
> @@ -53,7 +54,6 @@ static void max8997_led_set_mode(struct max8997_led *led,
>  			enum max8997_led_mode mode)
>  {
>  	int ret;
> -	struct i2c_client *client = led->iodev->i2c;
>  	u8 mask = 0, val;
>  
>  	switch (mode) {
> @@ -89,8 +89,8 @@ static void max8997_led_set_mode(struct max8997_led *led,
>  	}
>  
>  	if (mask) {
> -		ret = max8997_update_reg(client, MAX8997_REG_LEN_CNTL, val,
> -					 mask);
> +		ret = regmap_update_bits(led->iodev->regmap,
> +					MAX8997_REG_LEN_CNTL, mask, val);
>  		if (ret)
>  			dev_err(led->iodev->dev,
>  				"failed to update register(%d)\n", ret);
> @@ -102,7 +102,6 @@ static void max8997_led_set_mode(struct max8997_led *led,
>  static void max8997_led_enable(struct max8997_led *led, bool enable)
>  {
>  	int ret;
> -	struct i2c_client *client = led->iodev->i2c;
>  	u8 val = 0, mask = MAX8997_LED_BOOST_ENABLE_MASK;
>  
>  	if (led->enabled == enable)
> @@ -110,7 +109,8 @@ static void max8997_led_enable(struct max8997_led *led, bool enable)
>  
>  	val = enable ? MAX8997_LED_BOOST_ENABLE_MASK : 0;
>  
> -	ret = max8997_update_reg(client, MAX8997_REG_BOOST_CNTL, val, mask);
> +	ret = regmap_update_bits(led->iodev->regmap,
> +				MAX8997_REG_BOOST_CNTL, mask, val);
>  	if (ret)
>  		dev_err(led->iodev->dev,
>  			"failed to update register(%d)\n", ret);
> @@ -122,7 +122,6 @@ static void max8997_led_set_current(struct max8997_led *led,
>  				enum led_brightness value)
>  {
>  	int ret;
> -	struct i2c_client *client = led->iodev->i2c;
>  	u8 val = 0, mask = 0, reg = 0;
>  
>  	switch (led->led_mode) {
> @@ -143,7 +142,7 @@ static void max8997_led_set_current(struct max8997_led *led,
>  	}
>  
>  	if (mask) {
> -		ret = max8997_update_reg(client, reg, val, mask);
> +		ret = regmap_update_bits(led->iodev->regmap, reg, mask, val);
>  		if (ret)
>  			dev_err(led->iodev->dev,
>  				"failed to update register(%d)\n", ret);
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 72d3808..ca57035 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -463,6 +463,7 @@ config MFD_MAX8997
>  	bool "Maxim Semiconductor MAX8997/8966 PMIC Support"
>  	depends on I2C=y
>  	select MFD_CORE
> +	select REGMAP_I2C
>  	select IRQ_DOMAIN
>  	help
>  	  Say yes here to add support for Maxim Semiconductor MAX8997/8966.
> diff --git a/drivers/mfd/max8997-irq.c b/drivers/mfd/max8997-irq.c
> index 43fa614..0e7ff39 100644
> --- a/drivers/mfd/max8997-irq.c
> +++ b/drivers/mfd/max8997-irq.c
> @@ -26,6 +26,7 @@
>  #include <linux/interrupt.h>
>  #include <linux/mfd/max8997.h>
>  #include <linux/mfd/max8997-private.h>
> +#include <linux/regmap.h>
>  
>  static const u8 max8997_mask_reg[] = {
>  	[PMIC_INT1] = MAX8997_REG_INT1MSK,
> @@ -41,25 +42,6 @@ static const u8 max8997_mask_reg[] = {
>  	[FLASH_STATUS] = MAX8997_REG_INVALID,
>  };
>  
> -static struct i2c_client *get_i2c(struct max8997_dev *max8997,
> -				enum max8997_irq_source src)
> -{
> -	switch (src) {
> -	case PMIC_INT1 ... PMIC_INT4:
> -		return max8997->i2c;
> -	case FUEL_GAUGE:
> -		return NULL;
> -	case MUIC_INT1 ... MUIC_INT3:
> -		return max8997->muic;
> -	case GPIO_LOW ... GPIO_HI:
> -		return max8997->i2c;
> -	case FLASH_STATUS:
> -		return max8997->i2c;
> -	default:
> -		return ERR_PTR(-EINVAL);
> -	}
> -}
> -
>  struct max8997_irq_data {
>  	int mask;
>  	enum max8997_irq_source group;
> @@ -124,15 +106,20 @@ static void max8997_irq_sync_unlock(struct irq_data *data)
>  	int i;
>  
>  	for (i = 0; i < MAX8997_IRQ_GROUP_NR; i++) {
> +		struct regmap *map;
>  		u8 mask_reg = max8997_mask_reg[i];
> -		struct i2c_client *i2c = get_i2c(max8997, i);
> +
> +		if (i >= MUIC_INT1 && i <= MUIC_INT3)
> +			map = max8997->regmap_muic;
> +		else
> +			map = max8997->regmap;
>  
>  		if (mask_reg == MAX8997_REG_INVALID ||
> -				IS_ERR_OR_NULL(i2c))
> +				IS_ERR_OR_NULL(map))
>  			continue;
>  		max8997->irq_masks_cache[i] = max8997->irq_masks_cur[i];
>  
> -		max8997_write_reg(i2c, max8997_mask_reg[i],
> +		regmap_write(map, max8997_mask_reg[i],
>  				max8997->irq_masks_cur[i]);
>  	}
>  
> @@ -181,11 +168,11 @@ static irqreturn_t max8997_irq_thread(int irq, void *data)
>  {
>  	struct max8997_dev *max8997 = data;
>  	u8 irq_reg[MAX8997_IRQ_GROUP_NR] = {};
> -	u8 irq_src;
> +	unsigned int irq_src;
>  	int ret;
>  	int i, cur_irq;
>  
> -	ret = max8997_read_reg(max8997->i2c, MAX8997_REG_INTSRC, &irq_src);
> +	ret = regmap_read(max8997->regmap, MAX8997_REG_INTSRC, &irq_src);
>  	if (ret < 0) {
>  		dev_err(max8997->dev, "Failed to read interrupt source: %d\n",
>  				ret);
> @@ -194,8 +181,8 @@ static irqreturn_t max8997_irq_thread(int irq, void *data)
>  
>  	if (irq_src & MAX8997_IRQSRC_PMIC) {
>  		/* PMIC INT1 ~ INT4 */
> -		max8997_bulk_read(max8997->i2c, MAX8997_REG_INT1, 4,
> -				&irq_reg[PMIC_INT1]);
> +		regmap_bulk_read(max8997->regmap, MAX8997_REG_INT1,
> +				&irq_reg[PMIC_INT1], 4);
>  	}
>  	if (irq_src & MAX8997_IRQSRC_FUELGAUGE) {
>  		/*
> @@ -215,8 +202,8 @@ static irqreturn_t max8997_irq_thread(int irq, void *data)
>  	}
>  	if (irq_src & MAX8997_IRQSRC_MUIC) {
>  		/* MUIC INT1 ~ INT3 */
> -		max8997_bulk_read(max8997->muic, MAX8997_MUIC_REG_INT1, 3,
> -				&irq_reg[MUIC_INT1]);
> +		regmap_bulk_read(max8997->regmap_muic, MAX8997_MUIC_REG_INT1,
> +				&irq_reg[MUIC_INT1], 3);
>  	}
>  	if (irq_src & MAX8997_IRQSRC_GPIO) {
>  		/* GPIO Interrupt */
> @@ -225,8 +212,8 @@ static irqreturn_t max8997_irq_thread(int irq, void *data)
>  		irq_reg[GPIO_LOW] = 0;
>  		irq_reg[GPIO_HI] = 0;
>  
> -		max8997_bulk_read(max8997->i2c, MAX8997_REG_GPIOCNTL1,
> -				MAX8997_NUM_GPIO, gpio_info);
> +		regmap_bulk_read(max8997->regmap, MAX8997_REG_GPIOCNTL1,
> +				gpio_info, MAX8997_NUM_GPIO);
>  		for (i = 0; i < MAX8997_NUM_GPIO; i++) {
>  			bool interrupt = false;
>  
> @@ -260,8 +247,10 @@ static irqreturn_t max8997_irq_thread(int irq, void *data)
>  	}
>  	if (irq_src & MAX8997_IRQSRC_FLASH) {
>  		/* Flash Status Interrupt */
> -		ret = max8997_read_reg(max8997->i2c, MAX8997_REG_FLASHSTATUS,
> -				&irq_reg[FLASH_STATUS]);
> +		unsigned int data;
> +		ret = regmap_read(max8997->regmap,
> +				MAX8997_REG_FLASHSTATUS, &data);
> +		irq_reg[FLASH_STATUS] = data;
>  	}
>  
>  	/* Apply masking */
> @@ -312,7 +301,7 @@ int max8997_irq_init(struct max8997_dev *max8997)
>  	struct irq_domain *domain;
>  	int i;
>  	int ret;
> -	u8 val;
> +	unsigned int val;
>  
>  	if (!max8997->irq) {
>  		dev_warn(max8997->dev, "No interrupt specified.\n");
> @@ -323,22 +312,19 @@ int max8997_irq_init(struct max8997_dev *max8997)
>  
>  	/* Mask individual interrupt sources */
>  	for (i = 0; i < MAX8997_IRQ_GROUP_NR; i++) {
> -		struct i2c_client *i2c;
> -
>  		max8997->irq_masks_cur[i] = 0xff;
>  		max8997->irq_masks_cache[i] = 0xff;
> -		i2c = get_i2c(max8997, i);
>  
> -		if (IS_ERR_OR_NULL(i2c))
> +		if (IS_ERR_OR_NULL(max8997->regmap))
>  			continue;
>  		if (max8997_mask_reg[i] == MAX8997_REG_INVALID)
>  			continue;
>  
> -		max8997_write_reg(i2c, max8997_mask_reg[i], 0xff);
> +		regmap_write(max8997->regmap, max8997_mask_reg[i], 0xff);
>  	}
>  
>  	for (i = 0; i < MAX8997_NUM_GPIO; i++) {
> -		max8997->gpio_status[i] = (max8997_read_reg(max8997->i2c,
> +		max8997->gpio_status[i] = (regmap_read(max8997->regmap,
>  						MAX8997_REG_GPIOCNTL1 + i,
>  						&val)
>  					& MAX8997_GPIO_DATA_MASK) ?
> diff --git a/drivers/mfd/max8997.c b/drivers/mfd/max8997.c
> index 595364e..c4a1072 100644
> --- a/drivers/mfd/max8997.c
> +++ b/drivers/mfd/max8997.c
> @@ -33,6 +33,7 @@
>  #include <linux/mfd/core.h>
>  #include <linux/mfd/max8997.h>
>  #include <linux/mfd/max8997-private.h>
> +#include <linux/regmap.h>
>  
>  #define I2C_ADDR_PMIC	(0xCC >> 1)
>  #define I2C_ADDR_MUIC	(0x4A >> 1)
> @@ -57,81 +58,29 @@ static const struct of_device_id max8997_pmic_dt_match[] = {
>  };
>  #endif
>  
> -int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
> -{
> -	struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
> -	int ret;
> -
> -	mutex_lock(&max8997->iolock);
> -	ret = i2c_smbus_read_byte_data(i2c, reg);
> -	mutex_unlock(&max8997->iolock);
> -	if (ret < 0)
> -		return ret;
> -
> -	ret &= 0xff;
> -	*dest = ret;
> -	return 0;
> -}
> -EXPORT_SYMBOL_GPL(max8997_read_reg);
> -
> -int max8997_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
> -{
> -	struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
> -	int ret;
> -
> -	mutex_lock(&max8997->iolock);
> -	ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
> -	mutex_unlock(&max8997->iolock);
> -	if (ret < 0)
> -		return ret;
> -
> -	return 0;
> -}
> -EXPORT_SYMBOL_GPL(max8997_bulk_read);
> -
> -int max8997_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
> -{
> -	struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
> -	int ret;
> -
> -	mutex_lock(&max8997->iolock);
> -	ret = i2c_smbus_write_byte_data(i2c, reg, value);
> -	mutex_unlock(&max8997->iolock);
> -	return ret;
> -}
> -EXPORT_SYMBOL_GPL(max8997_write_reg);
> -
> -int max8997_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
> -{
> -	struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
> -	int ret;
> +static const struct regmap_config max8997_regmap_config = {
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +	.max_register = MAX8997_REG_PMIC_END,
> +};
>  
> -	mutex_lock(&max8997->iolock);
> -	ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
> -	mutex_unlock(&max8997->iolock);
> -	if (ret < 0)
> -		return ret;
> +static const struct regmap_config max8997_regmap_rtc_config = {
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +	.max_register = MAX8997_RTC_REG_END,
> +};
>  
> -	return 0;
> -}
> -EXPORT_SYMBOL_GPL(max8997_bulk_write);
> +static const struct regmap_config max8997_regmap_haptic_config = {
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +	.max_register = MAX8997_HAPTIC_REG_END,
> +};
>  
> -int max8997_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
> -{
> -	struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
> -	int ret;
> -
> -	mutex_lock(&max8997->iolock);
> -	ret = i2c_smbus_read_byte_data(i2c, reg);
> -	if (ret >= 0) {
> -		u8 old_val = ret & 0xff;
> -		u8 new_val = (val & mask) | (old_val & (~mask));
> -		ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
> -	}
> -	mutex_unlock(&max8997->iolock);
> -	return ret;
> -}
> -EXPORT_SYMBOL_GPL(max8997_update_reg);
> +static const struct regmap_config max8997_regmap_muic_config = {
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +	.max_register = MAX8997_MUIC_REG_END,
> +};
>  
>  /*
>   * Only the common platform data elements for max8997 are parsed here from the
> @@ -230,6 +179,41 @@ static int max8997_i2c_probe(struct i2c_client *i2c,
>  	}
>  	i2c_set_clientdata(max8997->muic, max8997);
>  
> +	max8997->regmap = devm_regmap_init_i2c(i2c, &max8997_regmap_config);
> +	if (IS_ERR(max8997->regmap)) {
> +		ret = PTR_ERR(max8997->regmap);
> +		dev_err(max8997->dev,
> +				"failed to allocate register map: %d\n", ret);
> +		return ret;
> +	}
> +
> +	max8997->regmap_rtc = devm_regmap_init_i2c(max8997->rtc,
> +					&max8997_regmap_rtc_config);
> +	if (IS_ERR(max8997->regmap_rtc)) {
> +		ret = PTR_ERR(max8997->regmap_rtc);
> +		dev_err(max8997->dev,
> +				"failed to allocate register map: %d\n", ret);
> +		goto err_regmap;
> +	}
> +
> +	max8997->regmap_haptic = devm_regmap_init_i2c(max8997->haptic,
> +					&max8997_regmap_haptic_config);
> +	if (IS_ERR(max8997->regmap_haptic)) {
> +		ret = PTR_ERR(max8997->regmap_haptic);
> +		dev_err(max8997->dev,
> +				"failed to allocate register map: %d\n", ret);
> +		goto err_regmap;
> +	}
> +
> +	max8997->regmap_muic = devm_regmap_init_i2c(max8997->muic,
> +					&max8997_regmap_muic_config);
> +	if (IS_ERR(max8997->regmap_muic)) {
> +		ret = PTR_ERR(max8997->regmap_muic);
> +		dev_err(max8997->dev,
> +				"failed to allocate register map: %d\n", ret);
> +		goto err_regmap;
> +	}
> +
>  	pm_runtime_set_active(max8997->dev);
>  
>  	max8997_irq_init(max8997);
> @@ -254,6 +238,7 @@ static int max8997_i2c_probe(struct i2c_client *i2c,
>  
>  err_mfd:
>  	mfd_remove_devices(max8997->dev);
> +err_regmap:
>  	i2c_unregister_device(max8997->muic);
>  err_i2c_muic:
>  	i2c_unregister_device(max8997->haptic);
> @@ -441,15 +426,15 @@ static int max8997_freeze(struct device *dev)
>  	int i;
>  
>  	for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
> -		max8997_read_reg(i2c, max8997_dumpaddr_pmic[i],
> +		regmap_read(max8997->regmap, max8997_dumpaddr_pmic[i],
>  				&max8997->reg_dump[i]);
>  
>  	for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
> -		max8997_read_reg(i2c, max8997_dumpaddr_muic[i],
> +		regmap_read(max8997->regmap_muic, max8997_dumpaddr_muic[i],
>  				&max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
>  
>  	for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
> -		max8997_read_reg(i2c, max8997_dumpaddr_haptic[i],
> +		regmap_read(max8997->regmap_haptic, max8997_dumpaddr_haptic[i],
>  				&max8997->reg_dump[i + MAX8997_REG_PMIC_END +
>  				MAX8997_MUIC_REG_END]);
>  
> @@ -463,15 +448,15 @@ static int max8997_restore(struct device *dev)
>  	int i;
>  
>  	for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
> -		max8997_write_reg(i2c, max8997_dumpaddr_pmic[i],
> +		regmap_write(max8997->regmap, max8997_dumpaddr_pmic[i],
>  				max8997->reg_dump[i]);
>  
>  	for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
> -		max8997_write_reg(i2c, max8997_dumpaddr_muic[i],
> +		regmap_write(max8997->regmap_muic, max8997_dumpaddr_muic[i],
>  				max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
>  
>  	for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
> -		max8997_write_reg(i2c, max8997_dumpaddr_haptic[i],
> +		regmap_write(max8997->regmap_haptic, max8997_dumpaddr_haptic[i],
>  				max8997->reg_dump[i + MAX8997_REG_PMIC_END +
>  				MAX8997_MUIC_REG_END]);
>  
> diff --git a/drivers/power/max8997_charger.c b/drivers/power/max8997_charger.c
> index 4bdedfe..43d8481 100644
> --- a/drivers/power/max8997_charger.c
> +++ b/drivers/power/max8997_charger.c
> @@ -26,6 +26,7 @@
>  #include <linux/power_supply.h>
>  #include <linux/mfd/max8997.h>
>  #include <linux/mfd/max8997-private.h>
> +#include <linux/regmap.h>
>  
>  struct charger_data {
>  	struct device *dev;
> @@ -46,14 +47,14 @@ static int max8997_battery_get_property(struct power_supply *psy,
>  {
>  	struct charger_data *charger = container_of(psy,
>  			struct charger_data, battery);
> -	struct i2c_client *i2c = charger->iodev->i2c;
>  	int ret;
> -	u8 reg;
> +	unsigned int reg;
>  
>  	switch (psp) {
>  	case POWER_SUPPLY_PROP_STATUS:
>  		val->intval = 0;
> -		ret = max8997_read_reg(i2c, MAX8997_REG_STATUS4, &reg);
> +		ret = regmap_read(charger->iodev->regmap,
> +				MAX8997_REG_STATUS4, &reg);
>  		if (ret)
>  			return ret;
>  		if ((reg & (1 << 0)) == 0x1)
> @@ -62,7 +63,8 @@ static int max8997_battery_get_property(struct power_supply *psy,
>  		break;
>  	case POWER_SUPPLY_PROP_PRESENT:
>  		val->intval = 0;
> -		ret = max8997_read_reg(i2c, MAX8997_REG_STATUS4, &reg);
> +		ret = regmap_read(charger->iodev->regmap,
> +				MAX8997_REG_STATUS4, &reg);
>  		if (ret)
>  			return ret;
>  		if ((reg & (1 << 2)) == 0x0)
> @@ -71,7 +73,8 @@ static int max8997_battery_get_property(struct power_supply *psy,
>  		break;
>  	case POWER_SUPPLY_PROP_ONLINE:
>  		val->intval = 0;
> -		ret = max8997_read_reg(i2c, MAX8997_REG_STATUS4, &reg);
> +		ret = regmap_read(charger->iodev->regmap,
> +				MAX8997_REG_STATUS4, &reg);
>  		if (ret)
>  			return ret;
>  		/* DCINOK */
> @@ -103,8 +106,8 @@ static int max8997_battery_probe(struct platform_device *pdev)
>  		if (val > 0xf)
>  			val = 0xf;
>  
> -		ret = max8997_update_reg(iodev->i2c,
> -				MAX8997_REG_MBCCTRL5, val, 0xf);
> +		ret = regmap_update_bits(iodev->regmap,
> +				MAX8997_REG_MBCCTRL5, 0xf, val);
>  		if (ret < 0) {
>  			dev_err(&pdev->dev, "Cannot use i2c bus.\n");
>  			return ret;
> @@ -113,20 +116,20 @@ static int max8997_battery_probe(struct platform_device *pdev)
>  
>  	switch (pdata->timeout) {
>  	case 5:
> -		ret = max8997_update_reg(iodev->i2c, MAX8997_REG_MBCCTRL1,
> -				0x2 << 4, 0x7 << 4);
> +		ret = regmap_update_bits(iodev->regmap,
> +				MAX8997_REG_MBCCTRL1, 0x7 << 4, 0x2 << 4);
>  		break;
>  	case 6:
> -		ret = max8997_update_reg(iodev->i2c, MAX8997_REG_MBCCTRL1,
> -				0x3 << 4, 0x7 << 4);
> +		ret = regmap_update_bits(iodev->regmap,
> +				MAX8997_REG_MBCCTRL1, 0x7 << 4, 0x3 << 4);
>  		break;
>  	case 7:
> -		ret = max8997_update_reg(iodev->i2c, MAX8997_REG_MBCCTRL1,
> -				0x4 << 4, 0x7 << 4);
> +		ret = regmap_update_bits(iodev->regmap,
> +				MAX8997_REG_MBCCTRL1, 0x7 << 4, 0x4 << 4);
>  		break;
>  	case 0:
> -		ret = max8997_update_reg(iodev->i2c, MAX8997_REG_MBCCTRL1,
> -				0x7 << 4, 0x7 << 4);
> +		ret = regmap_update_bits(iodev->regmap,
> +				MAX8997_REG_MBCCTRL1, 0x7 << 4, 0x7 << 4);
>  		break;
>  	default:
>  		dev_err(&pdev->dev, "incorrect timeout value (%d)\n",
> diff --git a/drivers/regulator/max8997.c b/drivers/regulator/max8997.c
> index 9c31e21..faefd1c 100644
> --- a/drivers/regulator/max8997.c
> +++ b/drivers/regulator/max8997.c
> @@ -33,6 +33,7 @@
>  #include <linux/mfd/max8997.h>
>  #include <linux/mfd/max8997-private.h>
>  #include <linux/regulator/of_regulator.h>
> +#include <linux/regmap.h>
>  
>  struct max8997_data {
>  	struct device *dev;
> @@ -50,7 +51,7 @@ struct max8997_data {
>  	int buck125_gpioindex;
>  	bool ignore_gpiodvs_side_effect;
>  
> -	u8 saved_states[MAX8997_REG_MAX];
> +	unsigned int saved_states[MAX8997_REG_MAX];
>  };
>  
>  static const unsigned int safeoutvolt[] = {
> @@ -257,15 +258,14 @@ static int max8997_get_enable_register(struct regulator_dev *rdev,
>  static int max8997_reg_is_enabled(struct regulator_dev *rdev)
>  {
>  	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
> -	struct i2c_client *i2c = max8997->iodev->i2c;
>  	int ret, reg, mask, pattern;
> -	u8 val;
> +	unsigned int val;
>  
>  	ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
>  	if (ret)
>  		return ret;
>  
> -	ret = max8997_read_reg(i2c, reg, &val);
> +	ret = regmap_read(max8997->iodev->regmap, reg, &val);
>  	if (ret)
>  		return ret;
>  
> @@ -275,27 +275,25 @@ static int max8997_reg_is_enabled(struct regulator_dev *rdev)
>  static int max8997_reg_enable(struct regulator_dev *rdev)
>  {
>  	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
> -	struct i2c_client *i2c = max8997->iodev->i2c;
>  	int ret, reg, mask, pattern;
>  
>  	ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
>  	if (ret)
>  		return ret;
>  
> -	return max8997_update_reg(i2c, reg, pattern, mask);
> +	return regmap_update_bits(max8997->iodev->regmap, reg, mask, pattern);
>  }
>  
>  static int max8997_reg_disable(struct regulator_dev *rdev)
>  {
>  	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
> -	struct i2c_client *i2c = max8997->iodev->i2c;
>  	int ret, reg, mask, pattern;
>  
>  	ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
>  	if (ret)
>  		return ret;
>  
> -	return max8997_update_reg(i2c, reg, ~pattern, mask);
> +	return regmap_update_bits(max8997->iodev->regmap, reg, mask, ~pattern);
>  }
>  
>  static int max8997_get_voltage_register(struct regulator_dev *rdev,
> @@ -367,15 +365,14 @@ static int max8997_get_voltage_register(struct regulator_dev *rdev,
>  static int max8997_get_voltage_sel(struct regulator_dev *rdev)
>  {
>  	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
> -	struct i2c_client *i2c = max8997->iodev->i2c;
>  	int reg, shift, mask, ret;
> -	u8 val;
> +	unsigned int val;
>  
>  	ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
>  	if (ret)
>  		return ret;
>  
> -	ret = max8997_read_reg(i2c, reg, &val);
> +	ret = regmap_read(max8997->iodev->regmap, reg, &val);
>  	if (ret)
>  		return ret;
>  
> @@ -412,7 +409,6 @@ static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev,
>  		int min_uV, int max_uV, unsigned *selector)
>  {
>  	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
> -	struct i2c_client *i2c = max8997->iodev->i2c;
>  	int rid = rdev_get_id(rdev);
>  	int lb, ub;
>  	int reg, shift = 0, mask, ret = 0;
> @@ -454,7 +450,8 @@ static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev,
>  
>  	*selector = val;
>  
> -	ret = max8997_update_reg(i2c, reg, val << shift, mask);
> +	ret = regmap_update_bits(max8997->iodev->regmap,
> +				reg, mask, val << shift);
>  
>  	return ret;
>  }
> @@ -467,7 +464,6 @@ static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev,
>  		int min_uV, int max_uV, unsigned *selector)
>  {
>  	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
> -	struct i2c_client *i2c = max8997->iodev->i2c;
>  	const struct voltage_map_desc *desc;
>  	int rid = rdev_get_id(rdev);
>  	int i, reg, shift, mask, ret;
> @@ -499,7 +495,8 @@ static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev,
>  	if (ret)
>  		return ret;
>  
> -	ret = max8997_update_reg(i2c, reg, i << shift, mask << shift);
> +	ret = regmap_update_bits(max8997->iodev->regmap,
> +				reg, mask << shift, i << shift);
>  	*selector = i;
>  
>  	return ret;
> @@ -709,7 +706,6 @@ static int max8997_set_voltage_safeout_sel(struct regulator_dev *rdev,
>  					   unsigned selector)
>  {
>  	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
> -	struct i2c_client *i2c = max8997->iodev->i2c;
>  	int rid = rdev_get_id(rdev);
>  	int reg, shift = 0, mask, ret;
>  
> @@ -720,13 +716,13 @@ static int max8997_set_voltage_safeout_sel(struct regulator_dev *rdev,
>  	if (ret)
>  		return ret;
>  
> -	return max8997_update_reg(i2c, reg, selector << shift, mask << shift);
> +	return regmap_update_bits(max8997->iodev->regmap,
> +				reg, mask << shift, selector << shift);
>  }
>  
>  static int max8997_reg_disable_suspend(struct regulator_dev *rdev)
>  {
>  	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
> -	struct i2c_client *i2c = max8997->iodev->i2c;
>  	int ret, reg, mask, pattern;
>  	int rid = rdev_get_id(rdev);
>  
> @@ -734,20 +730,22 @@ static int max8997_reg_disable_suspend(struct regulator_dev *rdev)
>  	if (ret)
>  		return ret;
>  
> -	max8997_read_reg(i2c, reg, &max8997->saved_states[rid]);
> +	regmap_read(max8997->iodev->regmap,
> +			reg, &max8997->saved_states[rid]);
>  
>  	if (rid == MAX8997_LDO1 ||
>  			rid == MAX8997_LDO10 ||
>  			rid == MAX8997_LDO21) {
>  		dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n",
>  				rdev->desc->name);
> -		return max8997_update_reg(i2c, reg, 0x40, mask);
> +		return regmap_update_bits(max8997->iodev->regmap,
> +				reg, mask, 0x40);
>  	}
>  
>  	dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n",
>  			rdev->desc->name, max8997->saved_states[rid] & mask,
>  			(~pattern) & mask);
> -	return max8997_update_reg(i2c, reg, ~pattern, mask);
> +	return regmap_update_bits(max8997->iodev->regmap, reg, mask, ~pattern);
>  }
>  
>  static struct regulator_ops max8997_ldo_ops = {
> @@ -1030,7 +1028,6 @@ static int max8997_pmic_probe(struct platform_device *pdev)
>  	struct regulator_config config = { };
>  	struct regulator_dev *rdev;
>  	struct max8997_data *max8997;
> -	struct i2c_client *i2c;
>  	int i, ret, nr_dvs;
>  	u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0;
>  
> @@ -1054,7 +1051,6 @@ static int max8997_pmic_probe(struct platform_device *pdev)
>  	max8997->iodev = iodev;
>  	max8997->num_regulators = pdata->num_regulators;
>  	platform_set_drvdata(pdev, max8997);
> -	i2c = max8997->iodev->i2c;
>  
>  	max8997->buck125_gpioindex = pdata->buck125_default_idx;
>  	max8997->buck1_gpiodvs = pdata->buck1_gpiodvs;
> @@ -1104,25 +1100,25 @@ static int max8997_pmic_probe(struct platform_device *pdev)
>  
>  	/* For the safety, set max voltage before setting up */
>  	for (i = 0; i < 8; i++) {
> -		max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
> -				max_buck1, 0x3f);
> -		max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
> -				max_buck2, 0x3f);
> -		max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
> -				max_buck5, 0x3f);
> +		regmap_update_bits(max8997->iodev->regmap,
> +				MAX8997_REG_BUCK1DVS1 + i, 0x3f, max_buck1);
> +		regmap_update_bits(max8997->iodev->regmap,
> +				MAX8997_REG_BUCK2DVS1 + i, 0x3f, max_buck2);
> +		regmap_update_bits(max8997->iodev->regmap,
> +				MAX8997_REG_BUCK5DVS1 + i, 0x3f, max_buck5);
>  	}
>  
>  	/* Initialize all the DVS related BUCK registers */
>  	for (i = 0; i < nr_dvs; i++) {
> -		max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
> -				max8997->buck1_vol[i],
> -				0x3f);
> -		max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
> -				max8997->buck2_vol[i],
> -				0x3f);
> -		max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
> -				max8997->buck5_vol[i],
> -				0x3f);
> +		regmap_update_bits(max8997->iodev->regmap,
> +				MAX8997_REG_BUCK1DVS1 + i,
> +				0x3f, max8997->buck1_vol[i]);
> +		regmap_update_bits(max8997->iodev->regmap,
> +				MAX8997_REG_BUCK2DVS1 + i,
> +				0x3f, max8997->buck2_vol[i]);
> +		regmap_update_bits(max8997->iodev->regmap,
> +				MAX8997_REG_BUCK5DVS1 + i,
> +				0x3f, max8997->buck5_vol[i]);
>  	}
>  
>  	/*
> @@ -1166,16 +1162,17 @@ static int max8997_pmic_probe(struct platform_device *pdev)
>  	}
>  
>  	/* DVS-GPIO disabled */
> -	max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ?
> -			(1 << 1) : (0 << 1), 1 << 1);
> -	max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ?
> -			(1 << 1) : (0 << 1), 1 << 1);
> -	max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ?
> -			(1 << 1) : (0 << 1), 1 << 1);
> +	regmap_update_bits(max8997->iodev->regmap, MAX8997_REG_BUCK1CTRL,
> +			1 << 1, (pdata->buck1_gpiodvs) ? (1 << 1) : (0 << 1));
> +	regmap_update_bits(max8997->iodev->regmap, MAX8997_REG_BUCK2CTRL,
> +			1 << 1, (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1));
> +	regmap_update_bits(max8997->iodev->regmap, MAX8997_REG_BUCK5CTRL,
> +			1 << 1, (pdata->buck5_gpiodvs) ? (1 << 1) : (0 << 1));
>  
>  	/* Misc Settings */
>  	max8997->ramp_delay = 10; /* set 10mV/us, which is the default */
> -	max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9);
> +	regmap_write(max8997->iodev->regmap,
> +			MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9);
>  
>  	for (i = 0; i < pdata->num_regulators; i++) {
>  		const struct voltage_map_desc *desc;
> diff --git a/drivers/rtc/rtc-max8997.c b/drivers/rtc/rtc-max8997.c
> index 0777c01..b866f7d5 100644
> --- a/drivers/rtc/rtc-max8997.c
> +++ b/drivers/rtc/rtc-max8997.c
> @@ -20,6 +20,7 @@
>  #include <linux/platform_device.h>
>  #include <linux/mfd/max8997-private.h>
>  #include <linux/irqdomain.h>
> +#include <linux/regmap.h>
>  
>  /* Module parameter for WTSR function control */
>  static int wtsr_en = 1;
> @@ -68,7 +69,6 @@ enum {
>  struct max8997_rtc_info {
>  	struct device		*dev;
>  	struct max8997_dev	*max8997;
> -	struct i2c_client	*rtc;
>  	struct rtc_device	*rtc_dev;
>  	struct mutex		lock;
>  	int virq;
> @@ -118,8 +118,8 @@ static inline int max8997_rtc_set_update_reg(struct max8997_rtc_info *info)
>  {
>  	int ret;
>  
> -	ret = max8997_write_reg(info->rtc, MAX8997_RTC_UPDATE1,
> -						RTC_UDR_MASK);
> +	ret = regmap_write(info->max8997->regmap_rtc,
> +				MAX8997_RTC_UPDATE1, RTC_UDR_MASK);
>  	if (ret < 0)
>  		dev_err(info->dev, "%s: fail to write update reg(%d)\n",
>  				__func__, ret);
> @@ -140,7 +140,8 @@ static int max8997_rtc_read_time(struct device *dev, struct rtc_time *tm)
>  	int ret;
>  
>  	mutex_lock(&info->lock);
> -	ret = max8997_bulk_read(info->rtc, MAX8997_RTC_SEC, RTC_NR_TIME, data);
> +	ret = regmap_bulk_read(info->max8997->regmap_rtc,
> +				MAX8997_RTC_SEC, data, RTC_NR_TIME);
>  	mutex_unlock(&info->lock);
>  
>  	if (ret < 0) {
> @@ -166,7 +167,8 @@ static int max8997_rtc_set_time(struct device *dev, struct rtc_time *tm)
>  
>  	mutex_lock(&info->lock);
>  
> -	ret = max8997_bulk_write(info->rtc, MAX8997_RTC_SEC, RTC_NR_TIME, data);
> +	ret = regmap_bulk_write(info->max8997->regmap_rtc,
> +				MAX8997_RTC_SEC, data, RTC_NR_TIME);
>  	if (ret < 0) {
>  		dev_err(info->dev, "%s: fail to write time reg(%d)\n", __func__,
>  				ret);
> @@ -183,13 +185,13 @@ static int max8997_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
>  {
>  	struct max8997_rtc_info *info = dev_get_drvdata(dev);
>  	u8 data[RTC_NR_TIME];
> -	u8 val;
> +	unsigned int val;
>  	int i, ret;
>  
>  	mutex_lock(&info->lock);
>  
> -	ret = max8997_bulk_read(info->rtc, MAX8997_RTC_ALARM1_SEC, RTC_NR_TIME,
> -			data);
> +	ret = regmap_bulk_read(info->max8997->regmap_rtc,
> +				MAX8997_RTC_ALARM1_SEC, data, RTC_NR_TIME);
>  	if (ret < 0) {
>  		dev_err(info->dev, "%s:%d fail to read alarm reg(%d)\n",
>  				__func__, __LINE__, ret);
> @@ -207,7 +209,8 @@ static int max8997_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
>  	}
>  
>  	alrm->pending = 0;
> -	ret = max8997_read_reg(info->max8997->i2c, MAX8997_REG_STATUS1, &val);
> +	ret = regmap_read(info->max8997->regmap_rtc,
> +			       MAX8997_REG_STATUS1, &val);
>  	if (ret < 0) {
>  		dev_err(info->dev, "%s:%d fail to read status1 reg(%d)\n",
>  				__func__, __LINE__, ret);
> @@ -230,8 +233,8 @@ static int max8997_rtc_stop_alarm(struct max8997_rtc_info *info)
>  	if (!mutex_is_locked(&info->lock))
>  		dev_warn(info->dev, "%s: should have mutex locked\n", __func__);
>  
> -	ret = max8997_bulk_read(info->rtc, MAX8997_RTC_ALARM1_SEC, RTC_NR_TIME,
> -				data);
> +	ret = regmap_bulk_read(info->max8997->regmap_rtc,
> +				MAX8997_RTC_ALARM1_SEC, data, RTC_NR_TIME);
>  	if (ret < 0) {
>  		dev_err(info->dev, "%s: fail to read alarm reg(%d)\n",
>  				__func__, ret);
> @@ -241,8 +244,8 @@ static int max8997_rtc_stop_alarm(struct max8997_rtc_info *info)
>  	for (i = 0; i < RTC_NR_TIME; i++)
>  		data[i] &= ~ALARM_ENABLE_MASK;
>  
> -	ret = max8997_bulk_write(info->rtc, MAX8997_RTC_ALARM1_SEC, RTC_NR_TIME,
> -				 data);
> +	ret = regmap_bulk_write(info->max8997->regmap_rtc,
> +				 MAX8997_RTC_ALARM1_SEC, data, RTC_NR_TIME);
>  	if (ret < 0) {
>  		dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
>  				__func__, ret);
> @@ -262,8 +265,8 @@ static int max8997_rtc_start_alarm(struct max8997_rtc_info *info)
>  	if (!mutex_is_locked(&info->lock))
>  		dev_warn(info->dev, "%s: should have mutex locked\n", __func__);
>  
> -	ret = max8997_bulk_read(info->rtc, MAX8997_RTC_ALARM1_SEC, RTC_NR_TIME,
> -				data);
> +	ret = regmap_bulk_read(info->max8997->regmap_rtc,
> +				MAX8997_RTC_ALARM1_SEC, data, RTC_NR_TIME);
>  	if (ret < 0) {
>  		dev_err(info->dev, "%s: fail to read alarm reg(%d)\n",
>  				__func__, ret);
> @@ -281,8 +284,8 @@ static int max8997_rtc_start_alarm(struct max8997_rtc_info *info)
>  	if (data[RTC_DATE] & 0x1f)
>  		data[RTC_DATE] |= (1 << ALARM_ENABLE_SHIFT);
>  
> -	ret = max8997_bulk_write(info->rtc, MAX8997_RTC_ALARM1_SEC, RTC_NR_TIME,
> -				 data);
> +	ret = regmap_bulk_write(info->max8997->regmap_rtc,
> +				 MAX8997_RTC_ALARM1_SEC, data, RTC_NR_TIME);
>  	if (ret < 0) {
>  		dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
>  				__func__, ret);
> @@ -313,8 +316,8 @@ static int max8997_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
>  	if (ret < 0)
>  		goto out;
>  
> -	ret = max8997_bulk_write(info->rtc, MAX8997_RTC_ALARM1_SEC, RTC_NR_TIME,
> -				data);
> +	ret = regmap_bulk_write(info->max8997->regmap_rtc,
> +				 MAX8997_RTC_ALARM1_SEC, data, RTC_NR_TIME);
>  	if (ret < 0) {
>  		dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
>  				__func__, ret);
> @@ -385,7 +388,8 @@ static void max8997_rtc_enable_wtsr(struct max8997_rtc_info *info, bool enable)
>  	dev_info(info->dev, "%s: %s WTSR\n", __func__,
>  			enable ? "enable" : "disable");
>  
> -	ret = max8997_update_reg(info->rtc, MAX8997_RTC_WTSR_SMPL, val, mask);
> +	ret = regmap_update_bits(info->max8997->regmap_rtc,
> +				 MAX8997_RTC_WTSR_SMPL, mask, val);
>  	if (ret < 0) {
>  		dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n",
>  				__func__, ret);
> @@ -398,7 +402,7 @@ static void max8997_rtc_enable_wtsr(struct max8997_rtc_info *info, bool enable)
>  static void max8997_rtc_enable_smpl(struct max8997_rtc_info *info, bool enable)
>  {
>  	int ret;
> -	u8 val, mask;
> +	unsigned int val, mask;
>  
>  	if (!smpl_en)
>  		return;
> @@ -413,7 +417,8 @@ static void max8997_rtc_enable_smpl(struct max8997_rtc_info *info, bool enable)
>  	dev_info(info->dev, "%s: %s SMPL\n", __func__,
>  			enable ? "enable" : "disable");
>  
> -	ret = max8997_update_reg(info->rtc, MAX8997_RTC_WTSR_SMPL, val, mask);
> +	ret = regmap_update_bits(info->max8997->regmap_rtc,
> +				 MAX8997_RTC_WTSR_SMPL, mask, val);
>  	if (ret < 0) {
>  		dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n",
>  				__func__, ret);
> @@ -423,7 +428,8 @@ static void max8997_rtc_enable_smpl(struct max8997_rtc_info *info, bool enable)
>  	max8997_rtc_set_update_reg(info);
>  
>  	val = 0;
> -	max8997_read_reg(info->rtc, MAX8997_RTC_WTSR_SMPL, &val);
> +	regmap_read(info->max8997->regmap_rtc,
> +			 MAX8997_RTC_WTSR_SMPL, &val);
>  	pr_info("%s: WTSR_SMPL(0x%02x)\n", __func__, val);
>  }
>  
> @@ -438,7 +444,8 @@ static int max8997_rtc_init_reg(struct max8997_rtc_info *info)
>  
>  	info->rtc_24hr_mode = 1;
>  
> -	ret = max8997_bulk_write(info->rtc, MAX8997_RTC_CTRLMASK, 2, data);
> +	ret = regmap_bulk_write(info->max8997->regmap_rtc,
> +				 MAX8997_RTC_CTRLMASK, data, 2);
>  	if (ret < 0) {
>  		dev_err(info->dev, "%s: fail to write controlm reg(%d)\n",
>  				__func__, ret);
> @@ -463,7 +470,6 @@ static int max8997_rtc_probe(struct platform_device *pdev)
>  	mutex_init(&info->lock);
>  	info->dev = &pdev->dev;
>  	info->max8997 = max8997;
> -	info->rtc = max8997->rtc;
>  
>  	platform_set_drvdata(pdev, info);
>  
> diff --git a/include/linux/mfd/max8997-private.h b/include/linux/mfd/max8997-private.h
> index 78c76cd..ea80ef8 100644
> --- a/include/linux/mfd/max8997-private.h
> +++ b/include/linux/mfd/max8997-private.h
> @@ -309,6 +309,8 @@ enum max8997_rtc_reg {
>  	MAX8997_RTC_ALARM2_MONTH	= 0x22,
>  	MAX8997_RTC_ALARM2_YEAR		= 0x23,
>  	MAX8997_RTC_ALARM2_DAY_OF_MONTH	= 0x24,
> +
> +	MAX8997_RTC_REG_END		= 0x25,
>  };
>  
>  enum max8997_irq_source {
> @@ -390,6 +392,11 @@ struct max8997_dev {
>  	unsigned long type;
>  	struct platform_device *battery; /* battery control (not fuel gauge) */
>  
> +	struct regmap *regmap;
> +	struct regmap *regmap_rtc;
> +	struct regmap *regmap_haptic;
> +	struct regmap *regmap_muic;
> +
>  	int irq;
>  	int ono;
>  	struct irq_domain *irq_domain;
> @@ -398,7 +405,7 @@ struct max8997_dev {
>  	int irq_masks_cache[MAX8997_IRQ_GROUP_NR];
>  
>  	/* For hibernation */
> -	u8 reg_dump[MAX8997_REG_PMIC_END + MAX8997_MUIC_REG_END +
> +	unsigned int reg_dump[MAX8997_REG_PMIC_END + MAX8997_MUIC_REG_END +
>  		MAX8997_HAPTIC_REG_END];
>  
>  	bool gpio_status[MAX8997_NUM_GPIO];
> @@ -413,14 +420,6 @@ extern int max8997_irq_init(struct max8997_dev *max8997);
>  extern void max8997_irq_exit(struct max8997_dev *max8997);
>  extern int max8997_irq_resume(struct max8997_dev *max8997);
>  
> -extern int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest);
> -extern int max8997_bulk_read(struct i2c_client *i2c, u8 reg, int count,
> -				u8 *buf);
> -extern int max8997_write_reg(struct i2c_client *i2c, u8 reg, u8 value);
> -extern int max8997_bulk_write(struct i2c_client *i2c, u8 reg, int count,
> -				u8 *buf);
> -extern int max8997_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask);
> -
>  #define MAX8997_GPIO_INT_BOTH	(0x3 << 4)
>  #define MAX8997_GPIO_INT_RISE	(0x2 << 4)
>  #define MAX8997_GPIO_INT_FALL	(0x1 << 4)
> -- 
> 1.9.1
> 

-- 
Dmitry

  parent reply	other threads:[~2015-01-29 18:01 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-11-12  7:23 [PATCH v5 0/3] mfd: max8997: add regmap support Robert Baldyga
2014-11-12  7:23 ` [PATCH v5 1/3] mfd: max8997: use regmap to access registers Robert Baldyga
2014-11-12 17:01   ` Sebastian Reichel
2015-01-29 18:01   ` Dmitry Torokhov [this message]
2014-11-12  7:23 ` [PATCH v5 2/3] mfd: max8997: handle IRQs using regmap Robert Baldyga
2014-11-12  7:23 ` [PATCH v5 3/3] mfd: max8997: change irq names to upper case Robert Baldyga
2015-01-30  1:00   ` Chanwoo Choi
2015-01-28 14:20 ` [PATCH v5 0/3] mfd: max8997: add regmap support Robert Baldyga
2015-01-29 18:03   ` Dmitry Torokhov
2015-02-17  8:49     ` Robert Baldyga
2016-05-03 15:56       ` Alexandre Belloni

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