Re: [RFC PATCH v1 05/13] mfd: bd70528: Support ROHM bd70528 PMIC - core

[Guenter Roeck <linux@xxxxxxxxxxxx>]

On 1/22/19 1:44 AM, Matti Vaittinen wrote:
> ROHM BD70528MWV is an ultra-low quiescent current general
> purpose single-chip power management IC for battery-powered
> portable devices.
>
> Add MFD core which enables chip access for following subdevices:
> 	- regulators/LED drivers
> 	- battery-charger
> 	- gpios
> 	- 32.768kHz clk
> 	- RTC
> 	- watchdog
>
> Signed-off-by: Matti Vaittinen <matti.vaittinen@xxxxxxxxxxxxxxxxx>
> ---
>   drivers/mfd/Kconfig              |  17 ++
>   drivers/mfd/Makefile             |   1 +
>   drivers/mfd/rohm-bd70528.c       | 409 +++++++++++++++++++++++++++++++++++++++
>   include/linux/mfd/rohm-bd70528.h | 392 +++++++++++++++++++++++++++++++++++++
>   4 files changed, 819 insertions(+)
>   create mode 100644 drivers/mfd/rohm-bd70528.c
>   create mode 100644 include/linux/mfd/rohm-bd70528.h
>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 8c5dfdce4326..d47eca440ece 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -1846,6 +1846,23 @@ config MFD_ROHM_BD718XX
>   	  NXP i.MX8. It contains 8 BUCK outputs and 7 LDOs, voltage monitoring
>   	  and emergency shut down as well as 32,768KHz clock output.
>   
> +config MFD_ROHM_BD70528
> +	tristate "ROHM BD70528 Power Management IC"
> +	depends on I2C=y
> +	depends on OF
> +	select REGMAP_I2C
> +	select REGMAP_IRQ
> +	select MFD_CORE
> +	help
> +	  Select this option to get support for the ROHM BD70528 Power
> +	  Management IC. BD71837 is general purpose single-chip power
> +	  management IC for battery-powered portable devices. It contains
> +	  3 ultra-low current consumption buck converters, 3 LDOs and 2 LED
> +	  Drivers. Also included are 4 GPIOs, a real-time clock (RTC), a 32kHz
> +	  crystal oscillator, high-accuracy VREF for use with an external ADC,
> +	  10 bits SAR ADC for battery temperature monitor and 1S battery
> +	  charger.
> +
>   config MFD_STM32_LPTIMER
>   	tristate "Support for STM32 Low-Power Timer"
>   	depends on (ARCH_STM32 && OF) || COMPILE_TEST
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 12980a4ad460..fc9b1408e39b 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -241,4 +241,5 @@ obj-$(CONFIG_MFD_MXS_LRADC)     += mxs-lradc.o
>   obj-$(CONFIG_MFD_SC27XX_PMIC)	+= sprd-sc27xx-spi.o
>   obj-$(CONFIG_RAVE_SP_CORE)	+= rave-sp.o
>   obj-$(CONFIG_MFD_ROHM_BD718XX)	+= rohm-bd718x7.o
> +obj-$(CONFIG_MFD_ROHM_BD70528)	+= rohm-bd70528.o
>   
> diff --git a/drivers/mfd/rohm-bd70528.c b/drivers/mfd/rohm-bd70528.c
> new file mode 100644
> index 000000000000..c2bf6c1a7136
> --- /dev/null
> +++ b/drivers/mfd/rohm-bd70528.c
> @@ -0,0 +1,409 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +//
> +// Copyright (C) 2018 ROHM Semiconductors
> +//
> +// ROHM BD70528 PMIC driver
> +
> +#include <linux/i2c.h>
> +#include <linux/interrupt.h>
> +#include <linux/irq.h>
> +#include <linux/mfd/core.h>
> +#include <linux/mfd/rohm-bd70528.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/regmap.h>
> +#include <linux/types.h>
> +
> +#define BD70528_INT_RES(_reg, _name)		\
> +	{					\
> +		.start = (_reg),		\
> +		.end = (_reg),			\
> +		.name = (_name),		\
> +		.flags = IORESOURCE_IRQ,	\
> +	}
> +
> +static DEFINE_MUTEX(rtc_timer_mutex);
> +
> +static const struct resource rtc_irqs[] = {
> +	BD70528_INT_RES(BD70528_INT_RTC_ALARM, "bd70528-rtc-alm"),
> +	BD70528_INT_RES(BD70528_INT_ELPS_TIM, "bd70528-elapsed-timer"),
> +};
> +
> +static const struct resource charger_irqs[] = {
> +	BD70528_INT_RES(BD70528_INT_BAT_OV_RES, "bd70528-bat-ov-res"),
> +	BD70528_INT_RES(BD70528_INT_BAT_OV_DET, "bd70528-bat-ov-det"),
> +	BD70528_INT_RES(BD70528_INT_DBAT_DET, "bd70528-bat-dead"),
> +	BD70528_INT_RES(BD70528_INT_BATTSD_COLD_RES, "bd70528-bat-warmed"),
> +	BD70528_INT_RES(BD70528_INT_BATTSD_COLD_DET, "bd70528-bat-cold"),
> +	BD70528_INT_RES(BD70528_INT_BATTSD_HOT_RES, "bd70528-bat-cooled"),
> +	BD70528_INT_RES(BD70528_INT_BATTSD_HOT_DET, "bd70528-bat-hot"),
> +	BD70528_INT_RES(BD70528_INT_CHG_TSD, "bd70528-chg-tshd"),
> +	BD70528_INT_RES(BD70528_INT_BAT_RMV, "bd70528-bat-removed"),
> +	BD70528_INT_RES(BD70528_INT_BAT_DET, "bd70528-bat-detected"),
> +	BD70528_INT_RES(BD70528_INT_DCIN2_OV_RES, "bd70528-dcin2-ov-res"),
> +	BD70528_INT_RES(BD70528_INT_DCIN2_OV_DET, "bd70528-dcin2-ov-det"),
> +	BD70528_INT_RES(BD70528_INT_DCIN2_RMV, "bd70528-dcin2-removed"),
> +	BD70528_INT_RES(BD70528_INT_DCIN2_DET, "bd70528-dcin2-detected"),
> +	BD70528_INT_RES(BD70528_INT_DCIN1_RMV, "bd70528-dcin1-removed"),
> +	BD70528_INT_RES(BD70528_INT_DCIN1_DET, "bd70528-dcin1-detected"),
> +};
> +
> +static struct mfd_cell bd70528_mfd_cells[] = {
> +	{ .name = "bd70528-pmic", },
> +	{ .name = "bd70528-gpio", },
> +	/*
> +	 * We use BD71837 driver to drive the clk block. Only differences to
> +	 * BD70528 clock gate are the register address and mask.
> +	 */
> +	{ .name = "bd718xx-clk", },
> +	{ .name = "bd70528-wdt", },
> +	{
> +		.name = "bd70528-power",
> +		.resources = &charger_irqs[0],
> +		.num_resources = ARRAY_SIZE(charger_irqs),
> +	},
> +	{
> +		.name = "bd70528-rtc",
> +		.resources = &rtc_irqs[0],
> +		.num_resources = ARRAY_SIZE(rtc_irqs),
> +	},
> +};
> +
> +static const struct regmap_range volatile_ranges[] = {
> +	/* IRQ regs */
> +	{
> +		.range_min = BD70528_REG_INT_MAIN,
> +		.range_max = BD70528_REG_INT_OP_FAIL,
> +	},
> +	/* RTC regs */
> +	{
> +		.range_min = BD70528_REG_RTC_COUNT_H,
> +		.range_max = BD70528_REG_RTC_ALM_REPEAT,
> +	},
> +	/*
> +	 * WDT control reg is special. Magic values must be
> +	 * written to it in order to change the control. Should
> +	 * not be cached.
> +	 */
> +	{
> +		.range_min = BD70528_REG_WDT_CTRL,
> +		.range_max = BD70528_REG_WDT_CTRL,
> +	},
> +	/*
> +	 * bd70528 contains also few other registers which require
> +	 * magic sequence to be written in order to update the value.
> +	 * At least SHIPMODE, HWRESET, WARMRESET,and STANDBY
> +	 */
> +	{
> +		.range_min = BD70528_REG_SHIPMODE,
> +		.range_max = BD70528_REG_STANDBY,
> +	},
> +};
> +
> +static const struct regmap_access_table volatile_regs = {
> +	.yes_ranges = &volatile_ranges[0],
> +	.n_yes_ranges = ARRAY_SIZE(volatile_ranges),
> +};
> +
> +static struct regmap_config bd70528_regmap = {
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +	.volatile_table = &volatile_regs,
> +	.max_register = BD70528_MAX_REGISTER,
> +	.cache_type = REGCACHE_RBTREE,
> +};
> +/* bit [0] - Shutdown register */
> +unsigned int bit0_offsets[] = {0};
> +/* bit [1] - Power failure register */
> +unsigned int bit1_offsets[] = {1};
> +/* bit [2] - VR FAULT register */
> +unsigned int bit2_offsets[] = {2};
> +/* bit [3] - PMU register interrupts */
> +unsigned int bit3_offsets[] = {3};
> +/* bit [4] - Charger 1 and Charger 2 registers */
> +unsigned int bit4_offsets[] = {4, 5};
> +/* bit [5] - RTC register */
> +unsigned int bit5_offsets[] = {6};
> +/* bit [6] - GPIO register */
> +unsigned int bit6_offsets[] = {7};
> +/* bit [7] - Invalid operation register */
> +unsigned int bit7_offsets[] = {8};
> +
> +static struct regmap_irq_sub_irq_map bd70528_sub_irq_offsets[] = {
> +	REGMAP_IRQ_MAIN_REG_OFFSET(bit0_offsets),
> +	REGMAP_IRQ_MAIN_REG_OFFSET(bit1_offsets),
> +	REGMAP_IRQ_MAIN_REG_OFFSET(bit2_offsets),
> +	REGMAP_IRQ_MAIN_REG_OFFSET(bit3_offsets),
> +	REGMAP_IRQ_MAIN_REG_OFFSET(bit4_offsets),
> +	REGMAP_IRQ_MAIN_REG_OFFSET(bit5_offsets),
> +	REGMAP_IRQ_MAIN_REG_OFFSET(bit6_offsets),
> +	REGMAP_IRQ_MAIN_REG_OFFSET(bit7_offsets),
> +};
> +
> +static struct regmap_irq irqs[] = {
> +	REGMAP_IRQ_REG(BD70528_INT_LONGPUSH, 0, BD70528_INT_LONGPUSH_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_WDT, 0, BD70528_INT_WDT_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_HWRESET, 0, BD70528_INT_HWRESET_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_RSTB_FAULT, 0, BD70528_INT_RSTB_FAULT_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_VBAT_UVLO, 0, BD70528_INT_VBAT_UVLO_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_TSD, 0, BD70528_INT_TSD_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_RSTIN, 0, BD70528_INT_RSTIN_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BUCK1_FAULT, 1,
> +		       BD70528_INT_BUCK1_FAULT_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BUCK2_FAULT, 1,
> +		       BD70528_INT_BUCK2_FAULT_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BUCK3_FAULT, 1,
> +		       BD70528_INT_BUCK3_FAULT_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_LDO1_FAULT, 1, BD70528_INT_LDO1_FAULT_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_LDO2_FAULT, 1, BD70528_INT_LDO2_FAULT_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_LDO3_FAULT, 1, BD70528_INT_LDO3_FAULT_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_LED1_FAULT, 1, BD70528_INT_LED1_FAULT_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_LED2_FAULT, 1, BD70528_INT_LED2_FAULT_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BUCK1_OCP, 2, BD70528_INT_BUCK1_OCP_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BUCK2_OCP, 2, BD70528_INT_BUCK2_OCP_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BUCK3_OCP, 2, BD70528_INT_BUCK3_OCP_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_LED1_OCP, 2, BD70528_INT_LED1_OCP_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_LED2_OCP, 2, BD70528_INT_LED2_OCP_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BUCK1_FULLON, 2,
> +		       BD70528_INT_BUCK1_FULLON_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BUCK2_FULLON, 2,
> +		       BD70528_INT_BUCK2_FULLON_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_SHORTPUSH, 3, BD70528_INT_SHORTPUSH_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_AUTO_WAKEUP, 3,
> +		       BD70528_INT_AUTO_WAKEUP_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_STATE_CHANGE, 3,
> +		       BD70528_INT_STATE_CHANGE_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BAT_OV_RES, 4, BD70528_INT_BAT_OV_RES_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BAT_OV_DET, 4, BD70528_INT_BAT_OV_DET_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_DBAT_DET, 4, BD70528_INT_DBAT_DET_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BATTSD_COLD_RES, 4,
> +		       BD70528_INT_BATTSD_COLD_RES_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BATTSD_COLD_DET, 4,
> +		       BD70528_INT_BATTSD_COLD_DET_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BATTSD_HOT_RES, 4,
> +		       BD70528_INT_BATTSD_HOT_RES_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BATTSD_HOT_DET, 4,
> +		       BD70528_INT_BATTSD_HOT_DET_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_CHG_TSD, 4, BD70528_INT_CHG_TSD_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BAT_RMV, 5, BD70528_INT_BAT_RMV_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BAT_DET, 5, BD70528_INT_BAT_DET_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_DCIN2_OV_RES, 5,
> +		       BD70528_INT_DCIN2_OV_RES_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_DCIN2_OV_DET, 5,
> +		       BD70528_INT_DCIN2_OV_DET_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_DCIN2_RMV, 5, BD70528_INT_DCIN2_RMV_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_DCIN2_DET, 5, BD70528_INT_DCIN2_DET_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_DCIN1_RMV, 5, BD70528_INT_DCIN1_RMV_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_DCIN1_DET, 5, BD70528_INT_DCIN1_DET_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_RTC_ALARM, 6, BD70528_INT_RTC_ALARM_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_ELPS_TIM, 6, BD70528_INT_ELPS_TIM_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_GPIO0, 7, BD70528_INT_GPIO0_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_GPIO1, 7, BD70528_INT_GPIO1_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_GPIO2, 7, BD70528_INT_GPIO2_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_GPIO3, 7, BD70528_INT_GPIO3_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BUCK1_DVS_OPFAIL, 8,
> +		       BD70528_INT_BUCK1_DVS_OPFAIL_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BUCK2_DVS_OPFAIL, 8,
> +		       BD70528_INT_BUCK2_DVS_OPFAIL_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_BUCK3_DVS_OPFAIL, 8,
> +		       BD70528_INT_BUCK3_DVS_OPFAIL_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_LED1_VOLT_OPFAIL, 8,
> +		       BD70528_INT_LED1_VOLT_OPFAIL_MASK),
> +	REGMAP_IRQ_REG(BD70528_INT_LED2_VOLT_OPFAIL, 8,
> +		       BD70528_INT_LED2_VOLT_OPFAIL_MASK),
> +};
> +
> +static struct regmap_irq_chip bd70528_irq_chip = {
> +	.name = "bd70528_irq",
> +	.main_status = BD70528_REG_INT_MAIN,
> +	.irqs = &irqs[0],
> +	.num_irqs = ARRAY_SIZE(irqs),
> +	.status_base = BD70528_REG_INT_SHDN,
> +	.mask_base = BD70528_REG_INT_SHDN_MASK,
> +	.ack_base = BD70528_REG_INT_SHDN,
> +	.type_base = BD70528_REG_GPIO1_IN,
> +	.init_ack_masked = true,
> +	.num_regs = 9,
> +	.num_main_regs = 1,
> +	.num_type_reg = 4,
> +	.sub_reg_offsets = &bd70528_sub_irq_offsets[0],
> +	.num_main_status_bits = 8,
> +	.irq_reg_stride = 1,
> +};
> +
> +#define WD_CTRL_MAGIC1 0x55
> +#define WD_CTRL_MAGIC2 0xAA
> +
> +static int bd70528_wdt_set(struct bd70528 *bd70528, int enable, int *old_state)
> +{
> +	int ret, i;
> +	unsigned int tmp;
> +	u8 wd_ctrl_arr[3] = { WD_CTRL_MAGIC1, WD_CTRL_MAGIC2, 0 };
> +	u8 *wd_ctrl = &wd_ctrl_arr[2];
> +
> +	ret = regmap_read(bd70528->chip.regmap, BD70528_REG_WDT_CTRL, &tmp);
> +	if (ret)
> +		return ret;
> +
> +	*wd_ctrl = (u8)tmp;
> +
> +	if (old_state) {
> +		if (*wd_ctrl & BD70528_MASK_WDT_EN)
> +			*old_state |= BD70528_WDT_STATE_BIT;
> +		else
> +			*old_state &= ~BD70528_WDT_STATE_BIT;
> +		if ((!enable) == (!(*old_state & BD70528_WDT_STATE_BIT)))
> +			return 0;
> +	}
> +
> +	if (enable) {
> +		if (*wd_ctrl & BD70528_MASK_WDT_EN)
> +			return 0;
> +		*wd_ctrl |= BD70528_MASK_WDT_EN;
> +	} else {
> +		if (*wd_ctrl & BD70528_MASK_WDT_EN)
> +			*wd_ctrl &= ~BD70528_MASK_WDT_EN;
> +		else
> +			return 0;
> +	}
> +
> +	for (i = 0; i < 3; i++) {
> +		ret = regmap_write(bd70528->chip.regmap, BD70528_REG_WDT_CTRL,
> +				   wd_ctrl_arr[i]);
> +		if (ret)
> +			return ret;
> +	}
> +
> +	ret = regmap_read(bd70528->chip.regmap, BD70528_REG_WDT_CTRL, &tmp);
> +	if ((tmp & BD70528_MASK_WDT_EN) != (*wd_ctrl & BD70528_MASK_WDT_EN)) {
> +		dev_err(bd70528->chip.dev,
> +			"Watchdog ctrl mismatch (hw) 0x%x (set) 0x%x\n",
> +			tmp, *wd_ctrl);
> +		ret = -EIO;
> +	}
> +	return ret;
> +}
> +
> +static int bd70528_i2c_probe(struct i2c_client *i2c,
> +			    const struct i2c_device_id *id)
> +{
> +	struct bd70528 *bd70528;
> +	struct regmap_irq_chip_data *irq_data;
> +	int ret, i;
> +
> +	if (!i2c->irq) {
> +		dev_err(&i2c->dev, "No IRQ configured\n");
> +		return -EINVAL;
> +	}
> +	bd70528 = devm_kzalloc(&i2c->dev, sizeof(*bd70528), GFP_KERNEL);
> +
> +	if (!bd70528)
> +		return -ENOMEM;
> +
> +	dev_set_drvdata(&i2c->dev, bd70528);
> +	bd70528->rtc_timer_lock = &rtc_timer_mutex;

One global mutex for all instances of this driver is odd.
Why isn't this just part of struct bd70528 ?

> +	bd70528->chip.chip_type = ROHM_CHIP_TYPE_BD70528;
> +	bd70528->wdt_set = bd70528_wdt_set;
> +	bd70528->chip.regmap = devm_regmap_init_i2c(i2c, &bd70528_regmap);
> +	if (IS_ERR(bd70528->chip.regmap)) {
> +		dev_err(&i2c->dev, "regmap initialization failed\n");
> +		return PTR_ERR(bd70528->chip.regmap);
> +	}
> +
> +	/*
> +	 * Disallow type setting for all IRQs by default as
> +	 *  most of them do not support setting type.
> +	 */
> +	for (i = 0; i < ARRAY_SIZE(irqs); i++)
> +		irqs[i].type.types_supported = 0;
> +
> +	irqs[BD70528_INT_GPIO0].type.type_reg_offset = 0;
> +	irqs[BD70528_INT_GPIO0].type.type_rising_val = 0x20;
> +	irqs[BD70528_INT_GPIO0].type.type_falling_val = 0x10;
> +	irqs[BD70528_INT_GPIO0].type.type_level_high_val = 0x40;
> +	irqs[BD70528_INT_GPIO0].type.type_level_low_val = 0x50;
> +	irqs[BD70528_INT_GPIO0].type.types_supported = (IRQ_TYPE_EDGE_BOTH |
> +				IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW);
> +	irqs[BD70528_INT_GPIO1].type.type_reg_offset = 2;
> +	irqs[BD70528_INT_GPIO1].type.type_rising_val = 0x20;
> +	irqs[BD70528_INT_GPIO1].type.type_falling_val = 0x10;
> +	irqs[BD70528_INT_GPIO1].type.type_level_high_val = 0x40;
> +	irqs[BD70528_INT_GPIO1].type.type_level_low_val = 0x50;
> +	irqs[BD70528_INT_GPIO1].type.types_supported = (IRQ_TYPE_EDGE_BOTH |
> +				IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW);
> +	irqs[BD70528_INT_GPIO2].type.type_reg_offset = 4;
> +	irqs[BD70528_INT_GPIO2].type.type_rising_val = 0x20;
> +	irqs[BD70528_INT_GPIO2].type.type_falling_val = 0x10;
> +	irqs[BD70528_INT_GPIO2].type.type_level_high_val = 0x40;
> +	irqs[BD70528_INT_GPIO2].type.type_level_low_val = 0x50;
> +	irqs[BD70528_INT_GPIO2].type.types_supported = (IRQ_TYPE_EDGE_BOTH |
> +				IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW);
> +	irqs[BD70528_INT_GPIO3].type.type_reg_offset = 6;
> +	irqs[BD70528_INT_GPIO3].type.type_rising_val = 0x20;
> +	irqs[BD70528_INT_GPIO3].type.type_falling_val = 0x10;
> +	irqs[BD70528_INT_GPIO3].type.type_level_high_val = 0x40;
> +	irqs[BD70528_INT_GPIO3].type.type_level_low_val = 0x50;
> +	irqs[BD70528_INT_GPIO3].type.types_supported = (IRQ_TYPE_EDGE_BOTH |
> +				IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW);
> +
> +	ret = devm_regmap_add_irq_chip(&i2c->dev, bd70528->chip.regmap,
> +				       i2c->irq, IRQF_ONESHOT, 0,
> +				       &bd70528_irq_chip, &irq_data);
> +	if (ret) {
> +		dev_err(&i2c->dev, "Failed to add irq_chip\n");
> +		return ret;
> +	}
> +	dev_dbg(&i2c->dev, "Registered %d irqs for chip\n",
> +			bd70528_irq_chip.num_irqs);
> +
> +	/*
> +	 * BD70528 irq controller is not touching the main mask register.
> +	 * So enable the GPIO block interrupts at main level. We can just
> +	 * leave them enabled as irq-controller should disable irqs
> +	 * from sub-registers when IRQ is disabled or freed.
> +	 */
> +	ret = regmap_update_bits(bd70528->chip.regmap,
> +				 BD70528_REG_INT_MAIN_MASK,
> +				 BD70528_INT_GPIO_MASK, 0);
> +
> +	ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO,
> +				   bd70528_mfd_cells,
> +				   ARRAY_SIZE(bd70528_mfd_cells), NULL, 0,
> +				   regmap_irq_get_domain(irq_data));
> +	if (ret)
> +		dev_err(&i2c->dev, "Failed to create subdevices\n");
> +
> +	return ret;
> +}
> +
> +static const struct of_device_id bd70528_of_match[] = {
> +	{
> +		.compatible = "rohm,bd70528",
> +	},
> +	{ },
> +};
> +MODULE_DEVICE_TABLE(of, bd70528_of_match);
> +
> +static struct i2c_driver bd70528_drv = {
> +	.driver = {
> +		.name = "rohm-bd70528",
> +		.of_match_table = bd70528_of_match,
> +	},
> +	.probe = &bd70528_i2c_probe,
> +};
> +
> +static int __init bd70528_init(void)
> +{
> +	return i2c_add_driver(&bd70528_drv);
> +}
> +subsys_initcall(bd70528_init);
> +
> +static void __exit bd70528_exit(void)
> +{
> +	i2c_del_driver(&bd70528_drv);
> +}
> +module_exit(bd70528_exit);
> +
> +MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@xxxxxxxxxxxxxxxxx>");
> +MODULE_DESCRIPTION("ROHM BD70528 Power Management IC driver");
> +MODULE_LICENSE("GPL");
> diff --git a/include/linux/mfd/rohm-bd70528.h b/include/linux/mfd/rohm-bd70528.h
> new file mode 100644
> index 000000000000..2ac0701309b8
> --- /dev/null
> +++ b/include/linux/mfd/rohm-bd70528.h
> @@ -0,0 +1,392 @@
> +/* SPDX-License-Identifier: GPL-2.0-or-later */
> +/* Copyright (C) 2018 ROHM Semiconductors */
> +
> +#ifndef __LINUX_MFD_BD70528_H__
> +#define __LINUX_MFD_BD70528_H__
> +
> +#include <linux/device.h>
> +#include <linux/mfd/rohm-generic.h>
> +#include <linux/regmap.h>
> +
> +struct bd70528 {
> +	/*
> +	 * Please keep this as the first member here as some
> +	 * drivers (clk) supporting more than one chip may only know this
> +	 * generic struct 'struct rohm_regmap_dev' and assume it is
> +	 * the first chunk of parent device's private data.
> +	 */
> +	struct rohm_regmap_dev chip;
> +	/* wdt_set must be called rtc_timer_lock held */
> +	int (*wdt_set)(struct bd70528 *bd70528, int enable, int *old_state);
> +	struct mutex *rtc_timer_lock;
> +};
> +
> +enum {
> +	BD70528_BUCK1,
> +	BD70528_BUCK2,
> +	BD70528_BUCK3,
> +	BD70528_LDO1,
> +	BD70528_LDO2,
> +	BD70528_LDO3,
> +	BD70528_LED1,
> +	BD70528_LED2,
> +};
> +
> +#define BD70528_BUCK_VOLTS 17
> +#define BD70528_BUCK_VOLTS 17
> +#define BD70528_BUCK_VOLTS 17
> +#define BD70528_LDO_VOLTS 0x20
> +
> +#define BD70528_REG_BUCK1_EN	0x0F
> +#define BD70528_REG_BUCK1_VOLT	0x15
> +#define BD70528_REG_BUCK2_EN	0x10
> +#define BD70528_REG_BUCK2_VOLT	0x16
> +#define BD70528_REG_BUCK3_EN	0x11
> +#define BD70528_REG_BUCK3_VOLT	0x17
> +#define BD70528_REG_LDO1_EN	0x1b
> +#define BD70528_REG_LDO1_VOLT	0x1e
> +#define BD70528_REG_LDO2_EN	0x1c
> +#define BD70528_REG_LDO2_VOLT	0x1f
> +#define BD70528_REG_LDO3_EN	0x1d
> +#define BD70528_REG_LDO3_VOLT	0x20
> +#define BD70528_REG_LED_CTRL	0x2b
> +#define BD70528_REG_LED_VOLT	0x29
> +#define BD70528_REG_LED_EN	0x2a
> +
> +/* main irq registers */
> +#define BD70528_REG_INT_MAIN	0x7E
> +#define BD70528_REG_INT_MAIN_MASK 0x74
> +
> +/* 'sub irq' registers */
> +#define BD70528_REG_INT_SHDN	0x7F
> +#define BD70528_REG_INT_PWR_FLT	0x80
> +#define BD70528_REG_INT_VR_FLT	0x81
> +#define BD70528_REG_INT_MISC	0x82
> +#define BD70528_REG_INT_BAT1	0x83
> +#define BD70528_REG_INT_BAT2	0x84
> +#define BD70528_REG_INT_RTC	0x85
> +#define BD70528_REG_INT_GPIO	0x86
> +#define BD70528_REG_INT_OP_FAIL	0x87
> +
> +#define BD70528_REG_INT_SHDN_MASK	0x75
> +#define BD70528_REG_INT_PWR_FLT_MASK	0x76
> +#define BD70528_REG_INT_VR_FLT_MASK	0x77
> +#define BD70528_REG_INT_MISC_MASK	0x78
> +#define BD70528_REG_INT_BAT1_MASK	0x79
> +#define BD70528_REG_INT_BAT2_MASK	0x7a
> +#define BD70528_REG_INT_RTC_MASK	0x7b
> +#define BD70528_REG_INT_GPIO_MASK	0x7c
> +#define BD70528_REG_INT_OP_FAIL_MASK	0x7d
> +
> +/* Reset related 'magic' registers */
> +#define BD70528_REG_SHIPMODE	0x03
> +#define BD70528_REG_HWRESET	0x04
> +#define BD70528_REG_WARMRESET	0x05
> +#define BD70528_REG_STANDBY	0x06
> +
> +/* GPIO registers */
> +#define BD70528_REG_GPIO_STATE	0x8F
> +
> +#define BD70528_REG_GPIO1_IN	0x4d
> +#define BD70528_REG_GPIO2_IN	0x4f
> +#define BD70528_REG_GPIO3_IN	0x51
> +#define BD70528_REG_GPIO4_IN	0x53
> +#define BD70528_REG_GPIO1_OUT	0x4e
> +#define BD70528_REG_GPIO2_OUT	0x50
> +#define BD70528_REG_GPIO3_OUT	0x52
> +#define BD70528_REG_GPIO4_OUT	0x54
> +
> +/* clk control */
> +
> +#define BD70528_REG_CLK_OUT	0x2c
> +
> +/* RTC */
> +
> +#define BD70528_REG_RTC_COUNT_H		0x2d
> +#define BD70528_REG_RTC_COUNT_L		0x2e
> +#define BD70528_REG_RTC_SEC		0x2f
> +#define BD70528_REG_RTC_MINUTE		0x30
> +#define BD70528_REG_RTC_HOUR		0x31
> +#define BD70528_REG_RTC_WEEK		0x32
> +#define BD70528_REG_RTC_DAY		0x33
> +#define BD70528_REG_RTC_MONTH		0x34
> +#define BD70528_REG_RTC_YEAR		0x35
> +
> +#define BD70528_REG_RTC_ALM_SEC		0x36
> +#define BD70528_REG_RTC_ALM_START	BD70528_REG_RTC_ALM_SEC
> +#define BD70528_REG_RTC_ALM_MINUTE	0x37
> +#define BD70528_REG_RTC_ALM_HOUR	0x38
> +#define BD70528_REG_RTC_ALM_WEEK	0x39
> +#define BD70528_REG_RTC_ALM_DAY		0x3a
> +#define BD70528_REG_RTC_ALM_MONTH	0x3b
> +#define BD70528_REG_RTC_ALM_YEAR	0x3c
> +#define BD70528_REG_RTC_ALM_MASK	0x3d
> +#define BD70528_REG_RTC_ALM_REPEAT	0x3e
> +#define BD70528_REG_RTC_START		BD70528_REG_RTC_SEC
> +
> +#define BD70528_REG_RTC_WAKE_SEC	0x43
> +#define BD70528_REG_RTC_WAKE_START	BD70528_REG_RTC_WAKE_SEC
> +#define BD70528_REG_RTC_WAKE_MIN	0x44
> +#define BD70528_REG_RTC_WAKE_HOUR	0x45
> +#define BD70528_REG_RTC_WAKE_CTRL	0x46
> +
> +#define BD70528_REG_ELAPSED_TIMER_EN	0x42
> +#define BD70528_REG_WAKE_EN		0x46
> +
> +/* WDT registers */
> +#define BD70528_REG_WDT_CTRL		0x4A
> +#define BD70528_REG_WDT_HOUR		0x49
> +#define BD70528_REG_WDT_MINUTE		0x48
> +#define BD70528_REG_WDT_SEC		0x47
> +
> +/* Charger / Battery */
> +#define BD70528_REG_CHG_CURR_STAT	0x59
> +#define BD70528_REG_CHG_BAT_STAT	0x57
> +#define BD70528_REG_CHG_BAT_TEMP	0x58
> +#define BD70528_REG_CHG_IN_STAT		0x56
> +#define BD70528_REG_CHG_DCIN_ILIM	0x5d
> +#define BD70528_REG_CHG_CHG_CURR_WARM	0x61
> +#define BD70528_REG_CHG_CHG_CURR_COLD	0x62
> +
> +
> +/* Masks for main IRQ register bits */
> +enum {
> +	BD70528_INT_SHDN,
> +#define BD70528_INT_SHDN_MASK (1<<BD70528_INT_SHDN)
> +	BD70528_INT_PWR_FLT,
> +#define BD70528_INT_PWR_FLT_MASK (1<<BD70528_INT_PWR_FLT)
> +	BD70528_INT_VR_FLT,
> +#define BD70528_INT_VR_FLT_MASK (1<<BD70528_INT_VR_FLT)
> +	BD70528_INT_MISC,
> +#define BD70528_INT_MISC_MASK (1<<BD70528_INT_MISC)
> +	BD70528_INT_BAT1,
> +#define BD70528_INT_BAT1_MASK (1<<BD70528_INT_BAT1)
> +	BD70528_INT_RTC,
> +#define BD70528_INT_RTC_MASK (1<<BD70528_INT_RTC)
> +	BD70528_INT_GPIO,
> +#define BD70528_INT_GPIO_MASK (1<<BD70528_INT_GPIO)
> +	BD70528_INT_OP_FAIL,
> +#define BD70528_INT_OP_FAIL_MASK (1<<BD70528_INT_OP_FAIL)
> +};
> +
> +/* IRQs */
> +enum {
> +	/* Shutdown register IRQs */
> +	BD70528_INT_LONGPUSH,
> +	BD70528_INT_WDT,
> +	BD70528_INT_HWRESET,
> +	BD70528_INT_RSTB_FAULT,
> +	BD70528_INT_VBAT_UVLO,
> +	BD70528_INT_TSD,
> +	BD70528_INT_RSTIN,
> +	/* Power failure register IRQs */
> +	BD70528_INT_BUCK1_FAULT,
> +	BD70528_INT_BUCK2_FAULT,
> +	BD70528_INT_BUCK3_FAULT,
> +	BD70528_INT_LDO1_FAULT,
> +	BD70528_INT_LDO2_FAULT,
> +	BD70528_INT_LDO3_FAULT,
> +	BD70528_INT_LED1_FAULT,
> +	BD70528_INT_LED2_FAULT,
> +	/* VR FAULT register IRQs */
> +	BD70528_INT_BUCK1_OCP,
> +	BD70528_INT_BUCK2_OCP,
> +	BD70528_INT_BUCK3_OCP,
> +	BD70528_INT_LED1_OCP,
> +	BD70528_INT_LED2_OCP,
> +	BD70528_INT_BUCK1_FULLON,
> +	BD70528_INT_BUCK2_FULLON,
> +	/* PMU register interrupts */
> +	BD70528_INT_SHORTPUSH,
> +	BD70528_INT_AUTO_WAKEUP,
> +	BD70528_INT_STATE_CHANGE,
> +	/* Charger 1 register IRQs */
> +	BD70528_INT_BAT_OV_RES,
> +	BD70528_INT_BAT_OV_DET,
> +	BD70528_INT_DBAT_DET,
> +	BD70528_INT_BATTSD_COLD_RES,
> +	BD70528_INT_BATTSD_COLD_DET,
> +	BD70528_INT_BATTSD_HOT_RES,
> +	BD70528_INT_BATTSD_HOT_DET,
> +	BD70528_INT_CHG_TSD,
> +	/* Charger 2 register IRQs */
> +	BD70528_INT_BAT_RMV,
> +	BD70528_INT_BAT_DET,
> +	BD70528_INT_DCIN2_OV_RES,
> +	BD70528_INT_DCIN2_OV_DET,
> +	BD70528_INT_DCIN2_RMV,
> +	BD70528_INT_DCIN2_DET,
> +	BD70528_INT_DCIN1_RMV,
> +	BD70528_INT_DCIN1_DET,
> +	/* RTC register IRQs */
> +	BD70528_INT_RTC_ALARM,
> +	BD70528_INT_ELPS_TIM,
> +	/* GPIO register IRQs */
> +	BD70528_INT_GPIO0,
> +	BD70528_INT_GPIO1,
> +	BD70528_INT_GPIO2,
> +	BD70528_INT_GPIO3,
> +	/* Invalid operation register IRQs */
> +	BD70528_INT_BUCK1_DVS_OPFAIL,
> +	BD70528_INT_BUCK2_DVS_OPFAIL,
> +	BD70528_INT_BUCK3_DVS_OPFAIL,
> +	BD70528_INT_LED1_VOLT_OPFAIL,
> +	BD70528_INT_LED2_VOLT_OPFAIL,
> +};
> +
> +/* Masks */
> +#define BD70528_INT_LONGPUSH_MASK 0x1
> +#define BD70528_INT_WDT_MASK 0x2
> +#define BD70528_INT_HWRESET_MASK 0x4
> +#define BD70528_INT_RSTB_FAULT_MASK 0x8
> +#define BD70528_INT_VBAT_UVLO_MASK 0x10
> +#define BD70528_INT_TSD_MASK 0x20
> +#define BD70528_INT_RSTIN_MASK 0x40
> +
> +#define BD70528_INT_BUCK1_FAULT_MASK 0x1
> +#define BD70528_INT_BUCK2_FAULT_MASK 0x2
> +#define BD70528_INT_BUCK3_FAULT_MASK 0x4
> +#define BD70528_INT_LDO1_FAULT_MASK 0x8
> +#define BD70528_INT_LDO2_FAULT_MASK 0x10
> +#define BD70528_INT_LDO3_FAULT_MASK 0x20
> +#define BD70528_INT_LED1_FAULT_MASK 0x40
> +#define BD70528_INT_LED2_FAULT_MASK 0x80
> +
> +#define BD70528_INT_BUCK1_OCP_MASK 0x1
> +#define BD70528_INT_BUCK2_OCP_MASK 0x2
> +#define BD70528_INT_BUCK3_OCP_MASK 0x4
> +#define BD70528_INT_LED1_OCP_MASK 0x8
> +#define BD70528_INT_LED2_OCP_MASK 0x10
> +#define BD70528_INT_BUCK1_FULLON_MASK 0x20
> +#define BD70528_INT_BUCK2_FULLON_MASK 0x40
> +
> +#define BD70528_INT_SHORTPUSH_MASK 0x1
> +#define BD70528_INT_AUTO_WAKEUP_MASK 0x2
> +#define BD70528_INT_STATE_CHANGE_MASK 0x10
> +
> +#define BD70528_INT_BAT_OV_RES_MASK 0x1
> +#define BD70528_INT_BAT_OV_DET_MASK 0x2
> +#define BD70528_INT_DBAT_DET_MASK 0x4
> +#define BD70528_INT_BATTSD_COLD_RES_MASK 0x8
> +#define BD70528_INT_BATTSD_COLD_DET_MASK 0x10
> +#define BD70528_INT_BATTSD_HOT_RES_MASK 0x20
> +#define BD70528_INT_BATTSD_HOT_DET_MASK 0x40
> +#define BD70528_INT_CHG_TSD_MASK 0x80
> +
> +#define BD70528_INT_BAT_RMV_MASK 0x1
> +#define BD70528_INT_BAT_DET_MASK 0x2
> +#define BD70528_INT_DCIN2_OV_RES_MASK 0x4
> +#define BD70528_INT_DCIN2_OV_DET_MASK 0x8
> +#define BD70528_INT_DCIN2_RMV_MASK 0x10
> +#define BD70528_INT_DCIN2_DET_MASK 0x20
> +#define BD70528_INT_DCIN1_RMV_MASK 0x40
> +#define BD70528_INT_DCIN1_DET_MASK 0x80
> +
> +#define BD70528_INT_RTC_ALARM_MASK 0x1
> +#define BD70528_INT_ELPS_TIM_MASK 0x2
> +
> +#define BD70528_INT_GPIO0_MASK 0x1
> +#define BD70528_INT_GPIO1_MASK 0x2
> +#define BD70528_INT_GPIO2_MASK 0x4
> +#define BD70528_INT_GPIO3_MASK 0x8
> +
> +#define BD70528_INT_BUCK1_DVS_OPFAIL_MASK 0x1
> +#define BD70528_INT_BUCK2_DVS_OPFAIL_MASK 0x2
> +#define BD70528_INT_BUCK3_DVS_OPFAIL_MASK 0x4
> +#define BD70528_INT_LED1_VOLT_OPFAIL_MASK 0x10
> +#define BD70528_INT_LED2_VOLT_OPFAIL_MASK 0x20
> +
> +#define BD70528_DEBOUNCE_MASK 0x3
> +
> +#define BD70528_DEBOUNCE_DISABLE 0
> +#define BD70528_DEBOUNCE_15MS 1
> +#define BD70528_DEBOUNCE_30MS 2
> +#define BD70528_DEBOUNCE_50MS 3
> +
> +#define BD70528_GPIO_DRIVE_MASK 0x2
> +#define BD70528_GPIO_PUSH_PULL 0x0
> +#define BD70528_GPIO_OPEN_DRAIN 0x2
> +
> +#define BD70528_GPIO_OUT_EN_MASK 0x80
> +#define BD70528_GPIO_OUT_ENABLE 0x80
> +#define BD70528_GPIO_OUT_DISABLE 0x0
> +
> +#define BD70528_GPIO_OUT_HI 0x1
> +#define BD70528_GPIO_OUT_LO 0x0
> +#define BD70528_GPIO_OUT_MASK 0x1
> +
> +#define BD70528_GPIO_IN_STATE_BASE 1
> +
> +#define BD70528_CLK_OUT_EN_MASK 0x1
> +
> +/* RTC masks to mask out reserved bits */
> +
> +#define BD70528_MASK_RTC_SEC		0x7f
> +#define BD70528_MASK_RTC_MINUTE		0x7f
> +#define BD70528_MASK_RTC_HOUR_24H	0x80
> +#define BD70528_MASK_RTC_HOUR_PM	0x20
> +#define BD70528_MASK_RTC_HOUR		0x1f
> +#define BD70528_MASK_RTC_DAY		0x3f
> +#define BD70528_MASK_RTC_WEEK		0x07
> +#define BD70528_MASK_RTC_MONTH		0x1f
> +#define BD70528_MASK_RTC_YEAR		0xff
> +#define BD70528_MASK_RTC_COUNT_L	0x7f
> +
> +#define BD70528_MASK_ELAPSED_TIMER_EN	0x1
> +/* Mask second, min and hour fields
> + * HW would support ALM irq for over 24h
> + * (by setting day, month and year too)
> + * but as we wish to keep this same as for
> + * wake-up we limit ALM to 24H and only
> + * unmask sec, min and hour
> + */
> +#define BD70528_MASK_ALM_EN		0x7
> +#define BD70528_MASK_WAKE_EN		0x1
> +
> +/* WDT masks */
> +#define BD70528_MASK_WDT_EN		0x1
> +#define BD70528_MASK_WDT_HOUR		0x1
> +#define BD70528_MASK_WDT_MINUTE		0x7f
> +#define BD70528_MASK_WDT_SEC		0x7f
> +
> +#define BD70528_WDT_STATE_BIT		0x1
> +#define BD70528_ELAPSED_STATE_BIT	0x2
> +#define BD70528_WAKE_STATE_BIT		0x4
> +
> +/* Charger masks */
> +#define BD70528_MASK_CHG_STAT		0x7f
> +#define BD70528_MASK_CHG_BAT_TIMER	0x20
> +#define BD70528_MASK_CHG_BAT_OVERVOLT	0x10
> +#define BD70528_MASK_CHG_BAT_DETECT	0x1
> +#define BD70528_MASK_CHG_DCIN1_UVLO	0x1
> +#define BD70528_MASK_CHG_DCIN_ILIM	0x3f
> +#define BD70528_MASK_CHG_CHG_CURR	0x1f
> +#define BD70528_MASK_CHG_TRICKLE_CURR	0x10
> +
> +/*
> + * Note, external battery register is the lonely rider at
> + * address 0xc5. See how to stuff that in the regmap
> + */
> +#define BD70528_MAX_REGISTER 0x94
> +
> +/* Buck control masks */
> +#define BD70528_MASK_RUN_EN	0x4
> +#define BD70528_MASK_STBY_EN	0x2
> +#define BD70528_MASK_IDLE_EN	0x1
> +#define BD70528_MASK_LED1_EN	0x1
> +#define BD70528_MASK_LED2_EN	0x10
> +
> +#define BD70528_MASK_BUCK_VOLT	0xf
> +#define BD70528_MASK_LDO_VOLT	0x1f
> +#define BD70528_MASK_LED1_VOLT	0x1
> +#define BD70528_MASK_LED2_VOLT	0x10
> +
> +/* Misc irq masks */
> +#define BD70528_INT_MASK_SHORT_PUSH	1
> +#define BD70528_INT_MASK_AUTO_WAKE	2
> +#define BD70528_INT_MASK_POWER_STATE	4
> +
> +#define BD70528_MASK_BUCK_RAMP 0x10
> +#define BD70528_SIFT_BUCK_RAMP 4
> +
> +#endif /* __LINUX_MFD_BD70528_H__ */