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Message-ID: <20251126142809.GD3070764@google.com>
Date: Wed, 26 Nov 2025 14:28:09 +0000
From: Lee Jones <lee@...nel.org>
To: Matti Vaittinen <mazziesaccount@...il.com>
Cc: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
	Pavel Machek <pavel@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Sebastian Reichel <sre@...nel.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>,
	linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-clk@...r.kernel.org, linux-gpio@...r.kernel.org,
	linux-rtc@...r.kernel.org, Andreas Kemnade <andreas@...nade.info>
Subject: Re: [PATCH v5 08/16] mfd: bd71828: Support ROHM BD72720

On Thu, 20 Nov 2025, Matti Vaittinen wrote:

> From: Matti Vaittinen <mazziesaccount@...il.com>
> 
> The ROHM BD72720 is a power management IC which continues the BD71828
> family of PMICs. Similarly to the BD71815 and BD71828, the BD72720
> integrates regulators, charger, RTC, clock gate and GPIOs.
> 
> The main difference to the earlier PMICs is that the BD72720 has two
> different I2C slave addresses. In addition to the registers behind the
> 'main I2C address', most of the charger (and to some extent LED) control
> is done via registers behind a 'secondary I2C slave address', 0x4c.
> 
> Signed-off-by: Matti Vaittinen <mazziesaccount@...il.com>
> 
> ---
> Revision history:
>  v2 =>:
>  - no changes
> 
>  RFCv1 => v2: (Mostly addressed comments from Lee and Andreas)
>  - Use stacked regmaps to avoid platform data and the tango with
>    multiple regmaps in the power-supply driver
>  - Use regmap_reg_range()
>  - make it clear bd72720_irq_type_base is an array
>  - tab-out definitions in the bd72720 header
>  - minor styling
> 
> Note: This patch depends on the series: "power: supply: add charger for
> BD71828" by Andreas:
> https://lore.kernel.org/all/20250918-bd71828-charger-v5-0-851164839c28@kemnade.info/
> 
> There are some new variants being planned. Most notably, the BD73900
> should be almost identical to the BD72720 - for everything else except
> the charger block.
> ---
>  drivers/mfd/Kconfig              |  18 +-
>  drivers/mfd/rohm-bd71828.c       | 488 +++++++++++++++++++++++-
>  include/linux/mfd/rohm-bd72720.h | 634 +++++++++++++++++++++++++++++++
>  include/linux/mfd/rohm-generic.h |   1 +
>  4 files changed, 1126 insertions(+), 15 deletions(-)
>  create mode 100644 include/linux/mfd/rohm-bd72720.h
> 
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 6cec1858947b..61e238b316f4 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -2211,20 +2211,22 @@ config MFD_ROHM_BD718XX
>  	  and emergency shut down as well as 32,768KHz clock output.
>  
>  config MFD_ROHM_BD71828
> -	tristate "ROHM BD71828 and BD71815 Power Management IC"
> +	tristate "ROHM BD718[15/28/79], BD72720 and BD73900 PMICs"
>  	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 BD71828 and BD71815
> -	  Power Management ICs. BD71828GW and BD71815AGW are single-chip power
> -	  management ICs mainly for battery-powered portable devices.
> -	  The BD71828 integrates 7 buck converters and 7 LDOs. The BD71815
> -	  has 5 bucks, 7 LDOs, and a boost for driving LEDs. Both ICs provide
> -	  also a single-cell linear charger, a Coulomb counter, a real-time
> -	  clock (RTC), GPIOs and a 32.768 kHz clock gate.
> +	  Select this option to get support for the ROHM BD71815, BD71828,
> +	  BD71879, BD72720 and BD73900 Power Management ICs. These are
> +	  single-chip power management ICs mainly for battery-powered portable

Nit: Power Management ICs (PMIC)

> +	  devices.
> +	  The BD71815 has 5 bucks, 7 LDOs, and a boost for driving LEDs.
> +	  The BD718[28/79] have 7 buck converters and 7 LDOs.
> +	  The BD72720 and the BD73900 have 10 bucks and 11 LDOs.
> +	  All ICs provide a single-cell linear charger, a Coulomb counter,
> +	  a real-time clock (RTC), GPIOs and a 32.768 kHz clock gate.

Nit: Real-Time Clock (RTC)

>  
>  config MFD_ROHM_BD957XMUF
>  	tristate "ROHM BD9576MUF and BD9573MUF Power Management ICs"
> diff --git a/drivers/mfd/rohm-bd71828.c b/drivers/mfd/rohm-bd71828.c
> index 2a43005b67ee..2e546aa60ffd 100644
> --- a/drivers/mfd/rohm-bd71828.c
> +++ b/drivers/mfd/rohm-bd71828.c
> @@ -2,7 +2,7 @@
>  //
>  // Copyright (C) 2019 ROHM Semiconductors
>  //
> -// ROHM BD71828/BD71815 PMIC driver
> +// ROHM BD718[15/28/79] and BD72720 PMIC driver

Looks like this header format slipped in.

I would appreciate a follow-up patch to change it to standard C
multi-line format (except the SPDX line).

>  #include <linux/gpio_keys.h>
>  #include <linux/i2c.h>
> @@ -13,12 +13,29 @@
>  #include <linux/mfd/core.h>
>  #include <linux/mfd/rohm-bd71815.h>
>  #include <linux/mfd/rohm-bd71828.h>
> +#include <linux/mfd/rohm-bd72720.h>
>  #include <linux/mfd/rohm-generic.h>
>  #include <linux/module.h>
>  #include <linux/of.h>
>  #include <linux/regmap.h>
>  #include <linux/types.h>
>  
> +#define BD72720_TYPED_IRQ_REG(_irq, _stat_offset, _mask, _type_offset)     \
> +	[_irq] = {							   \
> +		.reg_offset = (_stat_offset),				   \
> +		.mask = (_mask),					   \
> +		{							   \
> +			.type_reg_offset = (_type_offset),		   \
> +			.type_reg_mask = BD72720_GPIO_IRQ_TYPE_MASK,	   \
> +			.type_rising_val = BD72720_GPIO_IRQ_TYPE_RISING,   \
> +			.type_falling_val = BD72720_GPIO_IRQ_TYPE_FALLING, \
> +			.type_level_low_val = BD72720_GPIO_IRQ_TYPE_LOW,   \
> +			.type_level_high_val = BD72720_GPIO_IRQ_TYPE_HIGH, \
> +			.types_supported = IRQ_TYPE_EDGE_BOTH |		   \
> +				IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW,  \
> +		},							   \
> +	}
> +
>  static struct gpio_keys_button button = {
>  	.code = KEY_POWER,
>  	.gpio = -1,
> @@ -43,6 +60,12 @@ static const struct resource bd71828_rtc_irqs[] = {
>  	DEFINE_RES_IRQ_NAMED(BD71828_INT_RTC2, "bd70528-rtc-alm-2"),
>  };
>  
> +static const struct resource bd72720_rtc_irqs[] = {
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_RTC0, "bd70528-rtc-alm-0"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_RTC1, "bd70528-rtc-alm-1"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_RTC2, "bd70528-rtc-alm-2"),
> +};
> +
>  static const struct resource bd71815_power_irqs[] = {
>  	DEFINE_RES_IRQ_NAMED(BD71815_INT_DCIN_RMV, "bd71815-dcin-rmv"),
>  	DEFINE_RES_IRQ_NAMED(BD71815_INT_CLPS_OUT, "bd71815-dcin-clps-out"),
> @@ -156,6 +179,74 @@ static struct mfd_cell bd71828_mfd_cells[] = {
>  	},
>  };
>  
> +static const struct resource bd72720_power_irqs[] = {
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VBUS_RMV, "bd72720_int_vbus_rmv"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VBUS_DET, "bd72720_int_vbus_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VBUS_MON_RES, "bd72720_int_vbus_mon_res"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VBUS_MON_DET, "bd72720_int_vbus_mon_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VSYS_MON_RES, "bd72720_int_vsys_mon_res"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VSYS_MON_DET, "bd72720_int_vsys_mon_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VSYS_UV_RES, "bd72720_int_vsys_uv_res"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VSYS_UV_DET, "bd72720_int_vsys_uv_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VSYS_LO_RES, "bd72720_int_vsys_lo_res"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VSYS_LO_DET, "bd72720_int_vsys_lo_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VSYS_OV_RES, "bd72720_int_vsys_ov_res"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VSYS_OV_DET, "bd72720_int_vsys_ov_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_BAT_ILIM, "bd72720_int_bat_ilim"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_CHG_DONE, "bd72720_int_chg_done"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_EXTEMP_TOUT, "bd72720_int_extemp_tout"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_CHG_WDT_EXP, "bd72720_int_chg_wdt_exp"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_BAT_MNT_OUT, "bd72720_int_bat_mnt_out"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_BAT_MNT_IN, "bd72720_int_bat_mnt_in"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_CHG_TRNS, "bd72720_int_chg_trns"),
> +
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VBAT_MON_RES, "bd72720_int_vbat_mon_res"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VBAT_MON_DET, "bd72720_int_vbat_mon_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VBAT_SHT_RES, "bd72720_int_vbat_sht_res"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VBAT_SHT_DET, "bd72720_int_vbat_sht_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VBAT_LO_RES, "bd72720_int_vbat_lo_res"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VBAT_LO_DET, "bd72720_int_vbat_lo_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VBAT_OV_RES, "bd72720_int_vbat_ov_res"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_VBAT_OV_DET, "bd72720_int_vbat_ov_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_BAT_RMV, "bd72720_int_bat_rmv"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_BAT_DET, "bd72720_int_bat_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_DBAT_DET, "bd72720_int_dbat_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_BAT_TEMP_TRNS, "bd72720_int_bat_temp_trns"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_LOBTMP_RES, "bd72720_int_lobtmp_res"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_LOBTMP_DET, "bd72720_int_lobtmp_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_OVBTMP_RES, "bd72720_int_ovbtmp_res"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_OVBTMP_DET, "bd72720_int_ovbtmp_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_OCUR1_RES, "bd72720_int_ocur1_res"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_OCUR1_DET, "bd72720_int_ocur1_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_OCUR2_RES, "bd72720_int_ocur2_res"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_OCUR2_DET, "bd72720_int_ocur2_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_OCUR3_RES, "bd72720_int_ocur3_res"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_OCUR3_DET, "bd72720_int_ocur3_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_CC_MON1_DET, "bd72720_int_cc_mon1_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_CC_MON2_DET, "bd72720_int_cc_mon2_det"),
> +	DEFINE_RES_IRQ_NAMED(BD72720_INT_CC_MON3_DET, "bd72720_int_cc_mon3_det"),
> +};
> +
> +static const struct mfd_cell bd72720_mfd_cells[] = {
> +	{ .name = "bd72720-pmic", },
> +	{ .name = "bd72720-gpio", },
> +	{ .name = "bd72720-led", },
> +	{ .name = "bd72720-clk", },
> +	{
> +		.name = "bd72720-power",
> +		.resources = bd72720_power_irqs,
> +		.num_resources = ARRAY_SIZE(bd72720_power_irqs),
> +	}, {
> +		.name = "bd72720-rtc",
> +		.resources = bd72720_rtc_irqs,
> +		.num_resources = ARRAY_SIZE(bd72720_rtc_irqs),
> +	}, {
> +		.name = "gpio-keys",
> +		.platform_data = &bd71828_powerkey_data,
> +		.pdata_size = sizeof(bd71828_powerkey_data),
> +	},
> +};
> +
>  static const struct regmap_range bd71815_volatile_ranges[] = {
>  	regmap_reg_range(BD71815_REG_SEC, BD71815_REG_YEAR),
>  	regmap_reg_range(BD71815_REG_CONF, BD71815_REG_BAT_TEMP),
> @@ -180,6 +271,87 @@ static const struct regmap_range bd71828_volatile_ranges[] = {
>  	regmap_reg_range(BD71828_REG_INT_MAIN, BD71828_REG_IO_STAT),
>  };
>  
> +static const struct regmap_range bd72720_volatile_ranges_4b[] = {
> +	regmap_reg_range(BD72720_REG_RESETSRC_1, BD72720_REG_RESETSRC_2),
> +	regmap_reg_range(BD72720_REG_POWER_STATE, BD72720_REG_POWER_STATE),
> +	/* The state indicator bit changes when new state is reached */
> +	regmap_reg_range(BD72720_REG_PS_CTRL_1, BD72720_REG_PS_CTRL_1),
> +	regmap_reg_range(BD72720_REG_RCVNUM, BD72720_REG_RCVNUM),
> +	regmap_reg_range(BD72720_REG_CONF, BD72720_REG_HALL_STAT),
> +	regmap_reg_range(BD72720_REG_RTC_SEC, BD72720_REG_RTC_YEAR),
> +	regmap_reg_range(BD72720_REG_INT_LVL1_STAT, BD72720_REG_INT_ETC2_SRC),
> +};
> +
> +static const struct regmap_range bd72720_precious_ranges_4b[] = {
> +	regmap_reg_range(BD72720_REG_INT_LVL1_STAT, BD72720_REG_INT_ETC2_STAT),
> +};
> +
> +/*
> + * The BD72720 is an odd beast in that it contains two separate sets of
> + * registers, both starting from address 0x0. The twist is that these "pages"
> + * are behind different I2C slave addresses. Most of the registers are behind
> + * a slave address 0x4b, which will be used as the "main" address for this
> + * device.

New paragraph, new line?

> + * Most of the charger related registers are located behind slave address 0x4c.
> + * It is tempting to push the dealing with the charger registers and the extra
> + * 0x4c device in power-supply driver - but perhaps it's better for the sake of
> + * the cleaner re-use to deal with setting up all of the regmaps here.
> + * Furthermore, the LED stuff may need access to both of these devices.
> + *
> + * Instead of providing one of the regmaps to sub-devices in MFD platform data,
> + * we create one more 'wrapper regmap' with custom read/write operations. These
> + * custom accessors will select which of the 'real' regmaps to use, based on
> + * the register address.

As above.

> + * The register addresses are 8-bit, so we add offset 0x100 to the addresses
> + * behind the secondary slave 0x4c. The 'wrapper' regmap can then detect the
> + * correct slave address based on the register address and call regmap_write()
> + * and regmap_read() using correct 'real' regmap. This way the registers of
> + * both of the slaves can be accessed using one 'wrapper' regmap.
> + *
> + * NOTE: The added offsets mean that the defined addresses for slave 0x4c must
> + * be used through the 'wrapper' regmap because the offset must be stripped
> + * from the register addresses. The 0x4b can be accessed both indirectly using
> + * the 'wrapper' regmap, and directly using the 'real' regmap.
> + */
> +#define BD72720_SECONDARY_I2C_SLAVE 0x4c
> +
> +struct bd72720_regmaps {
> +	struct regmap *map1_4b;
> +	struct regmap *map2_4c;
> +};
> +
> +/* Translate the slave 0x4c wrapper register address to a real one */
> +#define BD72720_REG_UNWRAP(reg) ((reg) - 0x100)
> +
> +/* Ranges given to 'real' 0x4c regmap must use unwrapped addresses. */
> +#define BD72720_UNWRAP_REG_RANGE(startreg, endreg)					\
> +	regmap_reg_range(BD72720_REG_UNWRAP(startreg), BD72720_REG_UNWRAP(endreg))

'\n' here please.

> +static const struct regmap_range bd72720_volatile_ranges_4c[] = {
> +	/* Status information */
> +	BD72720_UNWRAP_REG_RANGE(BD72720_REG_CHG_STATE, BD72720_REG_CHG_EN),
> +	/*
> +	 * Under certain circumstances, write to some bits may be
> +	 * ignored
> +	 */
> +	BD72720_UNWRAP_REG_RANGE(BD72720_REG_CHG_CTRL, BD72720_REG_CHG_CTRL),
> +	/*
> +	 * TODO: Ensure this is used to advertise state, not (only?) to
> +	 * control it.
> +	 */
> +	BD72720_UNWRAP_REG_RANGE(BD72720_REG_VSYS_STATE_STAT, BD72720_REG_VSYS_STATE_STAT),
> +	/* Measured data */
> +	BD72720_UNWRAP_REG_RANGE(BD72720_REG_VM_VBAT_U, BD72720_REG_VM_VF_L),
> +	/* Self clearing bits */
> +	BD72720_UNWRAP_REG_RANGE(BD72720_REG_VM_VSYS_SA_MINMAX_CTRL,
> +				 BD72720_REG_VM_VSYS_SA_MINMAX_CTRL),
> +	/* Counters, self clearing bits */
> +	BD72720_UNWRAP_REG_RANGE(BD72720_REG_CC_CURCD_U, BD72720_REG_CC_CTRL),
> +	/* Self clearing bits */
> +	BD72720_UNWRAP_REG_RANGE(BD72720_REG_CC_CCNTD_CTRL, BD72720_REG_CC_CCNTD_CTRL),
> +	/* Self clearing bits */
> +	BD72720_UNWRAP_REG_RANGE(BD72720_REG_IMPCHK_CTRL, BD72720_REG_IMPCHK_CTRL),
> +};
> +
>  static const struct regmap_access_table bd71815_volatile_regs = {
>  	.yes_ranges = &bd71815_volatile_ranges[0],
>  	.n_yes_ranges = ARRAY_SIZE(bd71815_volatile_ranges),
> @@ -190,6 +362,21 @@ static const struct regmap_access_table bd71828_volatile_regs = {
>  	.n_yes_ranges = ARRAY_SIZE(bd71828_volatile_ranges),
>  };
>  
> +static const struct regmap_access_table bd72720_volatile_regs_4b = {
> +	.yes_ranges = &bd72720_volatile_ranges_4b[0],
> +	.n_yes_ranges = ARRAY_SIZE(bd72720_volatile_ranges_4b),
> +};
> +
> +static const struct regmap_access_table bd72720_precious_regs_4b = {
> +	.yes_ranges = &bd72720_precious_ranges_4b[0],
> +	.n_yes_ranges = ARRAY_SIZE(bd72720_precious_ranges_4b),
> +};
> +
> +static const struct regmap_access_table bd72720_volatile_regs_4c = {
> +	.yes_ranges = &bd72720_volatile_ranges_4c[0],
> +	.n_yes_ranges = ARRAY_SIZE(bd72720_volatile_ranges_4c),
> +};
> +
>  static const struct regmap_config bd71815_regmap = {
>  	.reg_bits = 8,
>  	.val_bits = 8,
> @@ -206,10 +393,79 @@ static const struct regmap_config bd71828_regmap = {
>  	.cache_type = REGCACHE_MAPLE,
>  };
>  
> +static int regmap_write_wrapper(void *context, unsigned int reg, unsigned int val)
> +{
> +	struct bd72720_regmaps *maps = context;
> +
> +	if (reg < 0x100)

Define this to something human readable please.

Some kind of PAGE or BOUNDARY.  Perhaps something better.

> +		return regmap_write(maps->map1_4b, reg, val);
> +
> +	reg = BD72720_REG_UNWRAP(reg);
> +
> +	return regmap_write(maps->map2_4c, reg, val);
> +}
> +
> +static int regmap_read_wrapper(void *context, unsigned int reg, unsigned int *val)
> +{
> +	struct bd72720_regmaps *maps = context;
> +
> +	if (reg < 0x100)

Likewise.

> +		return regmap_read(maps->map1_4b, reg, val);
> +
> +	reg = BD72720_REG_UNWRAP(reg);
> +
> +	return regmap_read(maps->map2_4c, reg, val);
> +}
> +
> +static const struct regmap_config bd72720_wrapper_map_config = {
> +	.name = "wrap-map",
> +	.reg_bits = 9,
> +	.val_bits = 8,
> +	.max_register = BD72720_REG_IMPCHK_CTRL,
> +	/*
> +	 * We don't want to duplicate caches. It would be a bit faster to
> +	 * have the cache in this 'wrapper regmap', and not in the 'real
> +	 * regmaps' bd72720_regmap_4b and bd72720_regmap_4c below. This would
> +	 * require all the subdevices to use the wrapper-map in order to be
> +	 * able to benefit from the cache.
> +	 * Currently most of the sub-devices use only the same slave-address
> +	 * as this MFD driver. Now, because we don't add the offset to the
> +	 * registers belonging to this slave, those devices can use either the
> +	 * wrapper map, or the bd72720_regmap_4b directly. This means majority
> +	 * of our sub devices don't need to care which regmap they get using
> +	 * the dev_get_regmap(). This unifies the code between the BD72720 and
> +	 * those variants which don't have this 'multiple slave addresses'
> +	 * -hassle.
> +	 * So, for a small performance penalty, we simplify the code for the
> +	 * sub-devices by having the caches in the wrapped regmaps and not here.
> +	 */
> +	.cache_type = REGCACHE_NONE,
> +	.reg_write = regmap_write_wrapper,
> +	.reg_read = regmap_read_wrapper,
> +};
> +
> +static const struct regmap_config bd72720_regmap_4b = {
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +	.volatile_table = &bd72720_volatile_regs_4b,
> +	.precious_table = &bd72720_precious_regs_4b,
> +	.max_register = BD72720_REG_INT_ETC2_SRC,
> +	.cache_type = REGCACHE_MAPLE,
> +};
> +
> +static const struct regmap_config bd72720_regmap_4c = {
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +	.volatile_table = &bd72720_volatile_regs_4c,
> +	.max_register = BD72720_REG_UNWRAP(BD72720_REG_IMPCHK_CTRL),
> +	.cache_type = REGCACHE_MAPLE,
> +};
> +
>  /*
>   * Mapping of main IRQ register bits to sub-IRQ register offsets so that we can
>   * access corect sub-IRQ registers based on bits that are set in main IRQ
> - * register. BD71815 and BD71828 have same sub-register-block offests.
> + * register. BD71815 and BD71828 have same sub-register-block offests, the
> + * BD72720 has a different one.
>   */
>  
>  static unsigned int bit0_offsets[] = {11};		/* RTC IRQ */
> @@ -221,6 +477,15 @@ static unsigned int bit5_offsets[] = {3};		/* VSYS IRQ */
>  static unsigned int bit6_offsets[] = {1, 2};		/* DCIN IRQ */
>  static unsigned int bit7_offsets[] = {0};		/* BUCK IRQ */
>  
> +static unsigned int bd72720_bit0_offsets[] = {0, 1};	/* PS1 and PS2 */
> +static unsigned int bd72720_bit1_offsets[] = {2, 3};	/* DVS1 and DVS2 */
> +static unsigned int bd72720_bit2_offsets[] = {4};	/* VBUS */
> +static unsigned int bd72720_bit3_offsets[] = {5};	/* VSYS */
> +static unsigned int bd72720_bit4_offsets[] = {6};	/* CHG */
> +static unsigned int bd72720_bit5_offsets[] = {7, 8};	/* BAT1 and BAT2 */
> +static unsigned int bd72720_bit6_offsets[] = {9};	/* IBAT */
> +static unsigned int bd72720_bit7_offsets[] = {10, 11};	/* ETC1 and ETC2 */
> +
>  static const struct regmap_irq_sub_irq_map bd718xx_sub_irq_offsets[] = {
>  	REGMAP_IRQ_MAIN_REG_OFFSET(bit0_offsets),
>  	REGMAP_IRQ_MAIN_REG_OFFSET(bit1_offsets),
> @@ -232,6 +497,17 @@ static const struct regmap_irq_sub_irq_map bd718xx_sub_irq_offsets[] = {
>  	REGMAP_IRQ_MAIN_REG_OFFSET(bit7_offsets),
>  };
>  
> +static const struct regmap_irq_sub_irq_map bd72720_sub_irq_offsets[] = {
> +	REGMAP_IRQ_MAIN_REG_OFFSET(bd72720_bit0_offsets),
> +	REGMAP_IRQ_MAIN_REG_OFFSET(bd72720_bit1_offsets),
> +	REGMAP_IRQ_MAIN_REG_OFFSET(bd72720_bit2_offsets),
> +	REGMAP_IRQ_MAIN_REG_OFFSET(bd72720_bit3_offsets),
> +	REGMAP_IRQ_MAIN_REG_OFFSET(bd72720_bit4_offsets),
> +	REGMAP_IRQ_MAIN_REG_OFFSET(bd72720_bit5_offsets),
> +	REGMAP_IRQ_MAIN_REG_OFFSET(bd72720_bit6_offsets),
> +	REGMAP_IRQ_MAIN_REG_OFFSET(bd72720_bit7_offsets),
> +};
> +
>  static const struct regmap_irq bd71815_irqs[] = {
>  	REGMAP_IRQ_REG(BD71815_INT_BUCK1_OCP, 0, BD71815_INT_BUCK1_OCP_MASK),
>  	REGMAP_IRQ_REG(BD71815_INT_BUCK2_OCP, 0, BD71815_INT_BUCK2_OCP_MASK),
> @@ -405,6 +681,117 @@ static const struct regmap_irq bd71828_irqs[] = {
>  	REGMAP_IRQ_REG(BD71828_INT_RTC2, 11, BD71828_INT_RTC2_MASK),
>  };
>  
> +static const struct regmap_irq bd72720_irqs[] = {
> +	REGMAP_IRQ_REG(BD72720_INT_LONGPUSH, 0, BD72720_INT_LONGPUSH_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_MIDPUSH, 0, BD72720_INT_MIDPUSH_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_SHORTPUSH, 0, BD72720_INT_SHORTPUSH_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_PUSH, 0, BD72720_INT_PUSH_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_HALL_DET, 0, BD72720_INT_HALL_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_HALL_TGL, 0, BD72720_INT_HALL_TGL_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_WDOG, 0, BD72720_INT_WDOG_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_SWRESET, 0, BD72720_INT_SWRESET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_SEQ_DONE, 1, BD72720_INT_SEQ_DONE_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_PGFAULT, 1, BD72720_INT_PGFAULT_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_BUCK1_DVS, 2, BD72720_INT_BUCK1_DVS_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_BUCK2_DVS, 2, BD72720_INT_BUCK2_DVS_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_BUCK3_DVS, 2, BD72720_INT_BUCK3_DVS_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_BUCK4_DVS, 2, BD72720_INT_BUCK4_DVS_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_BUCK5_DVS, 2, BD72720_INT_BUCK5_DVS_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_BUCK6_DVS, 2, BD72720_INT_BUCK6_DVS_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_BUCK7_DVS, 2, BD72720_INT_BUCK7_DVS_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_BUCK8_DVS, 2, BD72720_INT_BUCK8_DVS_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_BUCK9_DVS, 3, BD72720_INT_BUCK9_DVS_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_BUCK10_DVS, 3, BD72720_INT_BUCK10_DVS_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_LDO1_DVS, 3, BD72720_INT_LDO1_DVS_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_LDO2_DVS, 3, BD72720_INT_LDO2_DVS_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_LDO3_DVS, 3, BD72720_INT_LDO3_DVS_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_LDO4_DVS, 3, BD72720_INT_LDO4_DVS_MASK),
> +
> +	REGMAP_IRQ_REG(BD72720_INT_VBUS_RMV, 4, BD72720_INT_VBUS_RMV_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VBUS_DET, 4, BD72720_INT_VBUS_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VBUS_MON_RES, 4, BD72720_INT_VBUS_MON_RES_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VBUS_MON_DET, 4, BD72720_INT_VBUS_MON_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VSYS_MON_RES, 5, BD72720_INT_VSYS_MON_RES_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VSYS_MON_DET, 5, BD72720_INT_VSYS_MON_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VSYS_UV_RES, 5, BD72720_INT_VSYS_UV_RES_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VSYS_UV_DET, 5, BD72720_INT_VSYS_UV_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VSYS_LO_RES, 5, BD72720_INT_VSYS_LO_RES_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VSYS_LO_DET, 5, BD72720_INT_VSYS_LO_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VSYS_OV_RES, 5, BD72720_INT_VSYS_OV_RES_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VSYS_OV_DET, 5, BD72720_INT_VSYS_OV_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_BAT_ILIM, 6, BD72720_INT_BAT_ILIM_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_CHG_DONE, 6, BD72720_INT_CHG_DONE_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_EXTEMP_TOUT, 6, BD72720_INT_EXTEMP_TOUT_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_CHG_WDT_EXP, 6, BD72720_INT_CHG_WDT_EXP_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_BAT_MNT_OUT, 6, BD72720_INT_BAT_MNT_OUT_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_BAT_MNT_IN, 6, BD72720_INT_BAT_MNT_IN_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_CHG_TRNS, 6, BD72720_INT_CHG_TRNS_MASK),
> +
> +	REGMAP_IRQ_REG(BD72720_INT_VBAT_MON_RES, 7, BD72720_INT_VBAT_MON_RES_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VBAT_MON_DET, 7, BD72720_INT_VBAT_MON_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VBAT_SHT_RES, 7, BD72720_INT_VBAT_SHT_RES_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VBAT_SHT_DET, 7, BD72720_INT_VBAT_SHT_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VBAT_LO_RES, 7, BD72720_INT_VBAT_LO_RES_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VBAT_LO_DET, 7, BD72720_INT_VBAT_LO_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VBAT_OV_RES, 7, BD72720_INT_VBAT_OV_RES_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VBAT_OV_DET, 7, BD72720_INT_VBAT_OV_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_BAT_RMV, 8, BD72720_INT_BAT_RMV_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_BAT_DET, 8, BD72720_INT_BAT_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_DBAT_DET, 8, BD72720_INT_DBAT_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_BAT_TEMP_TRNS, 8, BD72720_INT_BAT_TEMP_TRNS_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_LOBTMP_RES, 8, BD72720_INT_LOBTMP_RES_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_LOBTMP_DET, 8, BD72720_INT_LOBTMP_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_OVBTMP_RES, 8, BD72720_INT_OVBTMP_RES_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_OVBTMP_DET, 8, BD72720_INT_OVBTMP_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_OCUR1_RES, 9, BD72720_INT_OCUR1_RES_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_OCUR1_DET, 9, BD72720_INT_OCUR1_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_OCUR2_RES, 9, BD72720_INT_OCUR2_RES_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_OCUR2_DET, 9, BD72720_INT_OCUR2_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_OCUR3_RES, 9, BD72720_INT_OCUR3_RES_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_OCUR3_DET, 9, BD72720_INT_OCUR3_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_CC_MON1_DET, 10, BD72720_INT_CC_MON1_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_CC_MON2_DET, 10, BD72720_INT_CC_MON2_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_CC_MON3_DET, 10, BD72720_INT_CC_MON3_DET_MASK),
> +/*
> + * The GPIO1_IN and GPIO2_IN IRQs are generated from the PMIC's GPIO1 and GPIO2
> + * pins. Eg, they may be wired to other devices which can then use the PMIC as
> + * an interrupt controller. The GPIO1 and GPIO2 can have the IRQ type
> + * specified. All of the types (falling, rising, and both edges as well as low
> + * and high levels) are supported.
> + */
> +	BD72720_TYPED_IRQ_REG(BD72720_INT_GPIO1_IN, 10, BD72720_INT_GPIO1_IN_MASK, 0),
> +	BD72720_TYPED_IRQ_REG(BD72720_INT_GPIO2_IN, 10, BD72720_INT_GPIO2_IN_MASK, 1),
> +	REGMAP_IRQ_REG(BD72720_INT_VF125_RES, 11, BD72720_INT_VF125_RES_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VF125_DET, 11, BD72720_INT_VF125_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VF_RES, 11, BD72720_INT_VF_RES_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_VF_DET, 11, BD72720_INT_VF_DET_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_RTC0, 11, BD72720_INT_RTC0_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_RTC1, 11, BD72720_INT_RTC1_MASK),
> +	REGMAP_IRQ_REG(BD72720_INT_RTC2, 11, BD72720_INT_RTC2_MASK),
> +};
> +
> +static int bd72720_set_type_config(unsigned int **buf, unsigned int type,
> +				   const struct regmap_irq *irq_data,
> +				   int idx, void *irq_drv_data)
> +{
> +	const struct regmap_irq_type *t = &irq_data->type;
> +
> +	/*
> +	 * The regmap IRQ ecpects IRQ_TYPE_EDGE_BOTH to be written to register
> +	 * as logical OR of the type_falling_val and type_rising_val. This is
> +	 * not how the BD72720 implements this configuration, hence we need
> +	 * to handle this specific case separately.
> +	 */
> +	if (type == IRQ_TYPE_EDGE_BOTH) {
> +		buf[0][idx] &= ~t->type_reg_mask;
> +		buf[0][idx] |= BD72720_GPIO_IRQ_TYPE_BOTH;
> +
> +		return 0;
> +	}
> +
> +	return regmap_irq_set_type_config_simple(buf, type, irq_data, idx, irq_drv_data);
> +}
> +
>  static const struct regmap_irq_chip bd71828_irq_chip = {
>  	.name = "bd71828_irq",
>  	.main_status = BD71828_REG_INT_MAIN,
> @@ -437,6 +824,28 @@ static const struct regmap_irq_chip bd71815_irq_chip = {
>  	.irq_reg_stride = 1,
>  };
>  
> +static const unsigned int bd72720_irq_type_base[] = {BD72720_REG_GPIO1_CTRL};

I believe this should be: { BD72720_REG_GPIO1_CTRL };
> +
> +static const struct regmap_irq_chip bd72720_irq_chip = {
> +	.name = "bd72720_irq",
> +	.main_status = BD72720_REG_INT_LVL1_STAT,
> +	.irqs = &bd72720_irqs[0],
> +	.num_irqs = ARRAY_SIZE(bd72720_irqs),
> +	.status_base = BD72720_REG_INT_PS1_STAT,
> +	.unmask_base = BD72720_REG_INT_PS1_EN,
> +	.config_base = &bd72720_irq_type_base[0],
> +	.num_config_bases = 1,
> +	.num_config_regs = 2,
> +	.set_type_config = bd72720_set_type_config,
> +	.ack_base = BD72720_REG_INT_PS1_STAT,
> +	.init_ack_masked = true,
> +	.num_regs = 12,
> +	.num_main_regs = 1,
> +	.sub_reg_offsets = &bd72720_sub_irq_offsets[0],
> +	.num_main_status_bits = 8,
> +	.irq_reg_stride = 1,
> +};
> +
>  static int set_clk_mode(struct device *dev, struct regmap *regmap,
>  			int clkmode_reg)
>  {
> @@ -483,11 +892,40 @@ static void bd71828_remove_poweroff(void *data)
>  	pm_power_off = NULL;
>  }
>  
> +static struct regmap *bd72720_do_regmaps(struct i2c_client *i2c)
> +{
> +	struct bd72720_regmaps *maps;
> +	struct i2c_client *secondary_i2c;
> +
> +	secondary_i2c = devm_i2c_new_dummy_device(&i2c->dev, i2c->adapter,
> +						  BD72720_SECONDARY_I2C_SLAVE);
> +	if (IS_ERR(secondary_i2c)) {
> +		dev_err_probe(&i2c->dev, PTR_ERR(secondary_i2c),
> +			      "Failed to get secondary I2C\n");

You an use up to 100-char if it helps make things more readable.

> +		return (struct regmap *)secondary_i2c;

*shudders* -- that's a hack, right!

/me does some grepping around ...

Shouldn't this be:

		return ERR_CAST(secondary_i2c);

> +	}
> +
> +	maps = devm_kzalloc(&i2c->dev, sizeof(*maps), GFP_KERNEL);
> +	if (!maps)
> +		return ERR_PTR(-ENOMEM);
> +
> +	maps->map1_4b = devm_regmap_init_i2c(i2c, &bd72720_regmap_4b);
> +	if (IS_ERR(maps->map1_4b))
> +		return maps->map1_4b;
> +
> +	maps->map2_4c = devm_regmap_init_i2c(secondary_i2c, &bd72720_regmap_4c);
> +	if (IS_ERR(maps->map2_4c))
> +		return maps->map2_4c;
> +
> +	return devm_regmap_init(&i2c->dev, NULL, maps, &bd72720_wrapper_map_config);
> +}
> +
>  static int bd71828_i2c_probe(struct i2c_client *i2c)
>  {
>  	struct regmap_irq_chip_data *irq_data;
>  	int ret;
> -	struct regmap *regmap;
> +	struct regmap *regmap = NULL;
>  	const struct regmap_config *regmap_config;
>  	const struct regmap_irq_chip *irqchip;
>  	unsigned int chip_type;
> @@ -495,6 +933,7 @@ static int bd71828_i2c_probe(struct i2c_client *i2c)
>  	int cells;
>  	int button_irq;
>  	int clkmode_reg;
> +	int main_lvl_mask_reg = 0, main_lvl_val = 0;
>  
>  	if (!i2c->irq) {
>  		dev_err(&i2c->dev, "No IRQ configured\n");
> @@ -526,16 +965,34 @@ static int bd71828_i2c_probe(struct i2c_client *i2c)
>  		 */
>  		button_irq = 0;
>  		break;
> +	case ROHM_CHIP_TYPE_BD72720:
> +	{
> +		mfd = bd72720_mfd_cells;
> +		cells = ARRAY_SIZE(bd72720_mfd_cells);
> +
> +		regmap = bd72720_do_regmaps(i2c);
> +		if (IS_ERR(regmap))
> +			return dev_err_probe(&i2c->dev, PTR_ERR(regmap),
> +				     "Failed to initialize Regmap\n");
> +
> +		irqchip = &bd72720_irq_chip;
> +		clkmode_reg = BD72720_REG_OUT32K;
> +		button_irq = BD72720_INT_SHORTPUSH;
> +		main_lvl_mask_reg = BD72720_REG_INT_LVL1_EN;
> +		main_lvl_val = BD72720_MASK_LVL1_EN_ALL;
> +		break;
> +	}
>  	default:
>  		dev_err(&i2c->dev, "Unknown device type");
>  		return -EINVAL;
>  	}
>  
> -	regmap = devm_regmap_init_i2c(i2c, regmap_config);
> -	if (IS_ERR(regmap))
> -		return dev_err_probe(&i2c->dev, PTR_ERR(regmap),
> +	if (!regmap) {
> +		regmap = devm_regmap_init_i2c(i2c, regmap_config);
> +		if (IS_ERR(regmap))
> +			return dev_err_probe(&i2c->dev, PTR_ERR(regmap),
>  				     "Failed to initialize Regmap\n");
> -
> +	}

'\n'

>  	ret = devm_regmap_add_irq_chip(&i2c->dev, regmap, i2c->irq,
>  				       IRQF_ONESHOT, 0, irqchip, &irq_data);
>  	if (ret)
> @@ -545,6 +1002,20 @@ static int bd71828_i2c_probe(struct i2c_client *i2c)
>  	dev_dbg(&i2c->dev, "Registered %d IRQs for chip\n",
>  		irqchip->num_irqs);
>  
> +	/*
> +	 * On some ICs the main IRQ register has corresponding mask register.
> +	 * This is not handled by the regmap IRQ. Let's enable all the main
> +	 * level IRQs here. Further writes to the main level MASK is not
> +	 * needed because masking is handled by the per IRQ 2.nd level MASK
> +	 * registers. 2.nd level masks are handled by the regmap IRQ.
> +	 */
> +	if (main_lvl_mask_reg) {
> +		ret = regmap_write(regmap, main_lvl_mask_reg, main_lvl_val);
> +		if (ret) {
> +			return dev_err_probe(&i2c->dev, ret,
> +					"Failed to enable main level IRQs\n");
> +		}
> +	}
>  	if (button_irq) {
>  		ret = regmap_irq_get_virq(irq_data, button_irq);
>  		if (ret < 0)
> @@ -586,6 +1057,9 @@ static const struct of_device_id bd71828_of_match[] = {
>  	}, {
>  		.compatible = "rohm,bd71815",
>  		.data = (void *)ROHM_CHIP_TYPE_BD71815,
> +	}, {
> +		.compatible = "rohm,bd72720",
> +		.data = (void *)ROHM_CHIP_TYPE_BD72720,
>  	 },
>  	{ },
>  };
> diff --git a/include/linux/mfd/rohm-bd72720.h b/include/linux/mfd/rohm-bd72720.h
> new file mode 100644
> index 000000000000..42fcf8f81b2f
> --- /dev/null
> +++ b/include/linux/mfd/rohm-bd72720.h
> @@ -0,0 +1,634 @@
> +/* SPDX-License-Identifier: GPL-2.0-or-later */
> +/*
> + * Copyright 2024 ROHM Semiconductors.

Still out of date.

> + * Author: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
> + */
> +
> +#ifndef _MFD_BD72720_H
> +#define _MFD_BD72720_H
> +
> +#include <linux/regmap.h>
> +
> +enum {
> +	BD72720_BUCK1,
> +	BD72720_BUCK2,
> +	BD72720_BUCK3,
> +	BD72720_BUCK4,
> +	BD72720_BUCK5,
> +	BD72720_BUCK6,
> +	BD72720_BUCK7,
> +	BD72720_BUCK8,
> +	BD72720_BUCK9,
> +	BD72720_BUCK10,
> +	BD72720_BUCK11,
> +	BD72720_LDO1,
> +	BD72720_LDO2,
> +	BD72720_LDO3,
> +	BD72720_LDO4,
> +	BD72720_LDO5,
> +	BD72720_LDO6,
> +	BD72720_LDO7,
> +	BD72720_LDO8,
> +	BD72720_LDO9,
> +	BD72720_LDO10,
> +	BD72720_LDO11,
> +	BD72720_REGULATOR_AMOUNT,
> +};
> +
> +/* BD72720 interrupts */
> +#define BD72720_INT_LONGPUSH_MASK	BIT(0)
> +#define BD72720_INT_MIDPUSH_MASK	BIT(1)
> +#define BD72720_INT_SHORTPUSH_MASK	BIT(2)
> +#define BD72720_INT_PUSH_MASK		BIT(3)
> +#define BD72720_INT_HALL_DET_MASK	BIT(4)
> +#define BD72720_INT_HALL_TGL_MASK	BIT(5)
> +#define BD72720_INT_WDOG_MASK		BIT(6)
> +#define BD72720_INT_SWRESET_MASK	BIT(7)
> +#define BD72720_INT_SEQ_DONE_MASK	BIT(0)
> +#define BD72720_INT_PGFAULT_MASK	BIT(4)
> +#define BD72720_INT_BUCK1_DVS_MASK	BIT(0)
> +#define BD72720_INT_BUCK2_DVS_MASK	BIT(1)
> +#define BD72720_INT_BUCK3_DVS_MASK	BIT(2)
> +#define BD72720_INT_BUCK4_DVS_MASK	BIT(3)
> +#define BD72720_INT_BUCK5_DVS_MASK	BIT(4)
> +#define BD72720_INT_BUCK6_DVS_MASK	BIT(5)
> +#define BD72720_INT_BUCK7_DVS_MASK	BIT(6)
> +#define BD72720_INT_BUCK8_DVS_MASK	BIT(7)
> +#define BD72720_INT_BUCK9_DVS_MASK	BIT(0)
> +#define BD72720_INT_BUCK10_DVS_MASK	BIT(1)
> +#define BD72720_INT_LDO1_DVS_MASK	BIT(4)
> +#define BD72720_INT_LDO2_DVS_MASK	BIT(5)
> +#define BD72720_INT_LDO3_DVS_MASK	BIT(6)
> +#define BD72720_INT_LDO4_DVS_MASK	BIT(7)
> +#define BD72720_INT_VBUS_RMV_MASK	BIT(0)
> +#define BD72720_INT_VBUS_DET_MASK	BIT(1)
> +#define BD72720_INT_VBUS_MON_RES_MASK	BIT(2)
> +#define BD72720_INT_VBUS_MON_DET_MASK	BIT(3)
> +#define BD72720_INT_VSYS_MON_RES_MASK	BIT(0)
> +#define BD72720_INT_VSYS_MON_DET_MASK	BIT(1)
> +#define BD72720_INT_VSYS_UV_RES_MASK	BIT(2)
> +#define BD72720_INT_VSYS_UV_DET_MASK	BIT(3)
> +#define BD72720_INT_VSYS_LO_RES_MASK	BIT(4)
> +#define BD72720_INT_VSYS_LO_DET_MASK	BIT(5)
> +#define BD72720_INT_VSYS_OV_RES_MASK	BIT(6)
> +#define BD72720_INT_VSYS_OV_DET_MASK	BIT(7)
> +#define BD72720_INT_BAT_ILIM_MASK	BIT(0)
> +#define BD72720_INT_CHG_DONE_MASK	BIT(1)
> +#define BD72720_INT_EXTEMP_TOUT_MASK	BIT(2)
> +#define BD72720_INT_CHG_WDT_EXP_MASK	BIT(3)
> +#define BD72720_INT_BAT_MNT_OUT_MASK	BIT(4)
> +#define BD72720_INT_BAT_MNT_IN_MASK	BIT(5)
> +#define BD72720_INT_CHG_TRNS_MASK	BIT(7)
> +#define BD72720_INT_VBAT_MON_RES_MASK	BIT(0)
> +#define BD72720_INT_VBAT_MON_DET_MASK	BIT(1)
> +#define BD72720_INT_VBAT_SHT_RES_MASK	BIT(2)
> +#define BD72720_INT_VBAT_SHT_DET_MASK	BIT(3)
> +#define BD72720_INT_VBAT_LO_RES_MASK	BIT(4)
> +#define BD72720_INT_VBAT_LO_DET_MASK	BIT(5)
> +#define BD72720_INT_VBAT_OV_RES_MASK	BIT(6)
> +#define BD72720_INT_VBAT_OV_DET_MASK	BIT(7)
> +#define BD72720_INT_BAT_RMV_MASK	BIT(0)
> +#define BD72720_INT_BAT_DET_MASK	BIT(1)
> +#define BD72720_INT_DBAT_DET_MASK	BIT(2)
> +#define BD72720_INT_BAT_TEMP_TRNS_MASK	BIT(3)
> +#define BD72720_INT_LOBTMP_RES_MASK	BIT(4)
> +#define BD72720_INT_LOBTMP_DET_MASK	BIT(5)
> +#define BD72720_INT_OVBTMP_RES_MASK	BIT(6)
> +#define BD72720_INT_OVBTMP_DET_MASK	BIT(7)
> +#define BD72720_INT_OCUR1_RES_MASK	BIT(0)
> +#define BD72720_INT_OCUR1_DET_MASK	BIT(1)
> +#define BD72720_INT_OCUR2_RES_MASK	BIT(2)
> +#define BD72720_INT_OCUR2_DET_MASK	BIT(3)
> +#define BD72720_INT_OCUR3_RES_MASK	BIT(4)
> +#define BD72720_INT_OCUR3_DET_MASK	BIT(5)
> +#define BD72720_INT_CC_MON1_DET_MASK	BIT(0)
> +#define BD72720_INT_CC_MON2_DET_MASK	BIT(1)
> +#define BD72720_INT_CC_MON3_DET_MASK	BIT(2)
> +#define BD72720_INT_GPIO1_IN_MASK	BIT(4)
> +#define BD72720_INT_GPIO2_IN_MASK	BIT(5)
> +#define BD72720_INT_VF125_RES_MASK	BIT(0)
> +#define BD72720_INT_VF125_DET_MASK	BIT(1)
> +#define BD72720_INT_VF_RES_MASK		BIT(2)
> +#define BD72720_INT_VF_DET_MASK		BIT(3)
> +#define BD72720_INT_RTC0_MASK		BIT(4)
> +#define BD72720_INT_RTC1_MASK		BIT(5)
> +#define BD72720_INT_RTC2_MASK		BIT(6)

I'd be able to sleep better if these all lined up.

> +
> +enum {
> +	/*
> +	 * The IRQs excluding GPIO1 and GPIO2 are ordered in a same way as the
> +	 * respective IRQ bits in status and mask registers are ordered.
> +	 *
> +	 * The BD72720_INT_GPIO1_IN and BD72720_INT_GPIO2_IN are IRQs which can
> +	 * be used by other devices. Let's have  GPIO1 and GPIO2 as first IRQs
> +	 * here so we can use the regmap-IRQ with standard device tree xlate
> +	 * while devices connected to the BD72720 IRQ input pins can refer to
> +	 * the first two interrupt numbers in their device tree. If we placed
> +	 * BD72720_INT_GPIO1_IN and BD72720_INT_GPIO2_IN after the CC_MON_DET
> +	 * interrupts (like they are in the registers), the devices using
> +	 * BD72720 as an IRQ parent should refer the interrupts starting with
> +	 * an offset which might not be trivial to understand.
> +	 */
> +	BD72720_INT_GPIO1_IN,
> +	BD72720_INT_GPIO2_IN,
> +	BD72720_INT_LONGPUSH,
> +	BD72720_INT_MIDPUSH,
> +	BD72720_INT_SHORTPUSH,
> +	BD72720_INT_PUSH,
> +	BD72720_INT_HALL_DET,
> +	BD72720_INT_HALL_TGL,
> +	BD72720_INT_WDOG,
> +	BD72720_INT_SWRESET,
> +	BD72720_INT_SEQ_DONE,
> +	BD72720_INT_PGFAULT,
> +	BD72720_INT_BUCK1_DVS,
> +	BD72720_INT_BUCK2_DVS,
> +	BD72720_INT_BUCK3_DVS,
> +	BD72720_INT_BUCK4_DVS,
> +	BD72720_INT_BUCK5_DVS,
> +	BD72720_INT_BUCK6_DVS,
> +	BD72720_INT_BUCK7_DVS,
> +	BD72720_INT_BUCK8_DVS,
> +	BD72720_INT_BUCK9_DVS,
> +	BD72720_INT_BUCK10_DVS,
> +	BD72720_INT_LDO1_DVS,
> +	BD72720_INT_LDO2_DVS,
> +	BD72720_INT_LDO3_DVS,
> +	BD72720_INT_LDO4_DVS,
> +	BD72720_INT_VBUS_RMV,
> +	BD72720_INT_VBUS_DET,
> +	BD72720_INT_VBUS_MON_RES,
> +	BD72720_INT_VBUS_MON_DET,
> +	BD72720_INT_VSYS_MON_RES,
> +	BD72720_INT_VSYS_MON_DET,
> +	BD72720_INT_VSYS_UV_RES,
> +	BD72720_INT_VSYS_UV_DET,
> +	BD72720_INT_VSYS_LO_RES,
> +	BD72720_INT_VSYS_LO_DET,
> +	BD72720_INT_VSYS_OV_RES,
> +	BD72720_INT_VSYS_OV_DET,
> +	BD72720_INT_BAT_ILIM,
> +	BD72720_INT_CHG_DONE,
> +	BD72720_INT_EXTEMP_TOUT,
> +	BD72720_INT_CHG_WDT_EXP,
> +	BD72720_INT_BAT_MNT_OUT,
> +	BD72720_INT_BAT_MNT_IN,
> +	BD72720_INT_CHG_TRNS,
> +	BD72720_INT_VBAT_MON_RES,
> +	BD72720_INT_VBAT_MON_DET,
> +	BD72720_INT_VBAT_SHT_RES,
> +	BD72720_INT_VBAT_SHT_DET,
> +	BD72720_INT_VBAT_LO_RES,
> +	BD72720_INT_VBAT_LO_DET,
> +	BD72720_INT_VBAT_OV_RES,
> +	BD72720_INT_VBAT_OV_DET,
> +	BD72720_INT_BAT_RMV,
> +	BD72720_INT_BAT_DET,
> +	BD72720_INT_DBAT_DET,
> +	BD72720_INT_BAT_TEMP_TRNS,
> +	BD72720_INT_LOBTMP_RES,
> +	BD72720_INT_LOBTMP_DET,
> +	BD72720_INT_OVBTMP_RES,
> +	BD72720_INT_OVBTMP_DET,
> +	BD72720_INT_OCUR1_RES,
> +	BD72720_INT_OCUR1_DET,
> +	BD72720_INT_OCUR2_RES,
> +	BD72720_INT_OCUR2_DET,
> +	BD72720_INT_OCUR3_RES,
> +	BD72720_INT_OCUR3_DET,
> +	BD72720_INT_CC_MON1_DET,
> +	BD72720_INT_CC_MON2_DET,
> +	BD72720_INT_CC_MON3_DET,
> +	BD72720_INT_VF125_RES,
> +	BD72720_INT_VF125_DET,
> +	BD72720_INT_VF_RES,
> +	BD72720_INT_VF_DET,
> +	BD72720_INT_RTC0,
> +	BD72720_INT_RTC1,
> +	BD72720_INT_RTC2,
> +};
> +
> +/*
> + * BD72720 Registers:
> + * The BD72720 has two sets of registers behind two different I2C slave
> + * addresses. "Common" registers being behind 0x4b, the charger registers
> + * being behind 0x4c.
> + */
> +/* Registers behind I2C slave 0x4b */
> +enum {
> +	BD72720_REG_PRODUCT_ID,
> +	BD72720_REG_MANUFACTURER_ID,
> +	BD72720_REG_PMIC_REV_NUM,
> +	BD72720_REG_NVM_REV_NUM,
> +	BD72720_REG_BOOTSRC		= 0x10,
> +	BD72720_REG_RESETSRC_1,
> +	BD72720_REG_RESETSRC_2,
> +	BD72720_REG_RESETSRC_3,
> +	BD72720_REG_RESETSRC_4,
> +	BD72720_REG_RESETSRC_5,
> +	BD72720_REG_RESETSRC_6,
> +	BD72720_REG_RESETSRC_7,
> +	BD72720_REG_POWER_STATE,
> +	BD72720_REG_PS_CFG,
> +	BD72720_REG_PS_CTRL_1,
> +	BD72720_REG_PS_CTRL_2,
> +	BD72720_REG_RCVCFG,
> +	BD72720_REG_RCVNUM,
> +	BD72720_REG_CRDCFG,
> +	BD72720_REG_REX_CTRL,
> +
> +	BD72720_REG_BUCK1_ON,
> +	BD72720_REG_BUCK1_MODE,
> +	/* Deep idle vsel */
> +	BD72720_REG_BUCK1_VSEL_DI,
> +	/* Idle vsel */
> +	BD72720_REG_BUCK1_VSEL_I,
> +	/* Suspend vsel */
> +	BD72720_REG_BUCK1_VSEL_S,
> +	/* Run boot vsel */
> +	BD72720_REG_BUCK1_VSEL_RB,
> +	/* Run0 ... run3 vsel */
> +	BD72720_REG_BUCK1_VSEL_RB0,
> +	BD72720_REG_BUCK1_VSEL_RB1,
> +	BD72720_REG_BUCK1_VSEL_RB2,
> +	BD72720_REG_BUCK1_VSEL_RB3,
> +
> +	BD72720_REG_BUCK2_ON,
> +	BD72720_REG_BUCK2_MODE,
> +	BD72720_REG_BUCK2_VSEL_DI,
> +	BD72720_REG_BUCK2_VSEL_I,
> +	BD72720_REG_BUCK2_VSEL_S,
> +	/* Run vsel */
> +	BD72720_REG_BUCK2_VSEL_R,
> +
> +	BD72720_REG_BUCK3_ON,
> +	BD72720_REG_BUCK3_MODE,
> +	BD72720_REG_BUCK3_VSEL_DI,
> +	BD72720_REG_BUCK3_VSEL_I,
> +	BD72720_REG_BUCK3_VSEL_S,
> +	BD72720_REG_BUCK3_VSEL_R,
> +
> +	BD72720_REG_BUCK4_ON,
> +	BD72720_REG_BUCK4_MODE,
> +	BD72720_REG_BUCK4_VSEL_DI,
> +	BD72720_REG_BUCK4_VSEL_I,
> +	BD72720_REG_BUCK4_VSEL_S,
> +	BD72720_REG_BUCK4_VSEL_R,
> +
> +	BD72720_REG_BUCK5_ON,
> +	BD72720_REG_BUCK5_MODE,
> +	BD72720_REG_BUCK5_VSEL,
> +
> +	BD72720_REG_BUCK6_ON,
> +	BD72720_REG_BUCK6_MODE,
> +	BD72720_REG_BUCK6_VSEL,
> +
> +	BD72720_REG_BUCK7_ON,
> +	BD72720_REG_BUCK7_MODE,
> +	BD72720_REG_BUCK7_VSEL,
> +
> +	BD72720_REG_BUCK8_ON,
> +	BD72720_REG_BUCK8_MODE,
> +	BD72720_REG_BUCK8_VSEL,
> +
> +	BD72720_REG_BUCK9_ON,
> +	BD72720_REG_BUCK9_MODE,
> +	BD72720_REG_BUCK9_VSEL,
> +
> +	BD72720_REG_BUCK10_ON,
> +	BD72720_REG_BUCK10_MODE,
> +	BD72720_REG_BUCK10_VSEL,
> +
> +	BD72720_REG_LDO1_ON,
> +	BD72720_REG_LDO1_MODE1,
> +	BD72720_REG_LDO1_MODE2,
> +	BD72720_REG_LDO1_VSEL_DI,
> +	BD72720_REG_LDO1_VSEL_I,
> +	BD72720_REG_LDO1_VSEL_S,
> +	BD72720_REG_LDO1_VSEL_RB,
> +	BD72720_REG_LDO1_VSEL_R0,
> +	BD72720_REG_LDO1_VSEL_R1,
> +	BD72720_REG_LDO1_VSEL_R2,
> +	BD72720_REG_LDO1_VSEL_R3,
> +
> +	BD72720_REG_LDO2_ON,
> +	BD72720_REG_LDO2_MODE,
> +	BD72720_REG_LDO2_VSEL_DI,
> +	BD72720_REG_LDO2_VSEL_I,
> +	BD72720_REG_LDO2_VSEL_S,
> +	BD72720_REG_LDO2_VSEL_R,
> +
> +	BD72720_REG_LDO3_ON,
> +	BD72720_REG_LDO3_MODE,
> +	BD72720_REG_LDO3_VSEL_DI,
> +	BD72720_REG_LDO3_VSEL_I,
> +	BD72720_REG_LDO3_VSEL_S,
> +	BD72720_REG_LDO3_VSEL_R,
> +
> +	BD72720_REG_LDO4_ON,
> +	BD72720_REG_LDO4_MODE,
> +	BD72720_REG_LDO4_VSEL_DI,
> +	BD72720_REG_LDO4_VSEL_I,
> +	BD72720_REG_LDO4_VSEL_S,
> +	BD72720_REG_LDO4_VSEL_R,
> +
> +	BD72720_REG_LDO5_ON,
> +	BD72720_REG_LDO5_MODE,
> +	BD72720_REG_LDO5_VSEL,
> +
> +	BD72720_REG_LDO6_ON,
> +	BD72720_REG_LDO6_MODE,
> +	BD72720_REG_LDO6_VSEL,
> +
> +	BD72720_REG_LDO7_ON,
> +	BD72720_REG_LDO7_MODE,
> +	BD72720_REG_LDO7_VSEL,
> +
> +	BD72720_REG_LDO8_ON,
> +	BD72720_REG_LDO8_MODE,
> +	BD72720_REG_LDO8_VSEL,
> +
> +	BD72720_REG_LDO9_ON,
> +	BD72720_REG_LDO9_MODE,
> +	BD72720_REG_LDO9_VSEL,
> +
> +	BD72720_REG_LDO10_ON,
> +	BD72720_REG_LDO10_MODE,
> +	BD72720_REG_LDO10_VSEL,
> +
> +	BD72720_REG_LDO11_ON,
> +	BD72720_REG_LDO11_MODE,
> +	BD72720_REG_LDO11_VSEL,
> +
> +	BD72720_REG_GPIO1_ON		= 0x8b,
> +	BD72720_REG_GPIO2_ON,
> +	BD72720_REG_GPIO3_ON,
> +	BD72720_REG_GPIO4_ON,
> +	BD72720_REG_GPIO5_ON,
> +
> +	BD72720_REG_GPIO1_CTRL,
> +	BD72720_REG_GPIO2_CTRL,
> +#define BD72720_GPIO_IRQ_TYPE_MASK	GENMASK(6, 4)
> +#define BD72720_GPIO_IRQ_TYPE_FALLING	0x0
> +#define BD72720_GPIO_IRQ_TYPE_RISING	0x1
> +#define BD72720_GPIO_IRQ_TYPE_BOTH	0x2
> +#define BD72720_GPIO_IRQ_TYPE_HIGH	0x3
> +#define BD72720_GPIO_IRQ_TYPE_LOW	0x4
> +	BD72720_REG_GPIO3_CTRL,
> +	BD72720_REG_GPIO4_CTRL,
> +	BD72720_REG_GPIO5_CTRL,
> +#define BD72720_GPIO_DRIVE_MASK		BIT(1)
> +#define BD72720_GPIO_HIGH		BIT(0)
> +
> +	BD72720_REG_EPDEN_CTRL,
> +	BD72720_REG_GATECNT_CTRL,
> +	BD72720_REG_LED_CTRL,
> +
> +	BD72720_REG_PWRON_CFG1,
> +	BD72720_REG_PWRON_CFG2,
> +
> +	BD72720_REG_OUT32K,
> +	BD72720_REG_CONF,
> +	BD72720_REG_HALL_STAT,
> +
> +	BD72720_REG_RTC_SEC		= 0xa0,
> +#define BD72720_REG_RTC_START		BD72720_REG_RTC_SEC
> +	BD72720_REG_RTC_MIN,
> +	BD72720_REG_RTC_HOUR,
> +	BD72720_REG_RTC_WEEK,
> +	BD72720_REG_RTC_DAY,
> +	BD72720_REG_RTC_MON,
> +	BD72720_REG_RTC_YEAR,
> +
> +	BD72720_REG_RTC_ALM0_SEC,
> +#define BD72720_REG_RTC_ALM_START	BD72720_REG_RTC_ALM0_SEC
> +	BD72720_REG_RTC_ALM0_MIN,
> +	BD72720_REG_RTC_ALM0_HOUR,
> +	BD72720_REG_RTC_ALM0_WEEK,
> +	BD72720_REG_RTC_ALM0_MON,
> +	BD72720_REG_RTC_ALM0_YEAR,
> +
> +	BD72720_REG_RTC_ALM1_SEC,
> +	BD72720_REG_RTC_ALM1_MIN,
> +	BD72720_REG_RTC_ALM1_HOUR,
> +	BD72720_REG_RTC_ALM1_WEEK,
> +	BD72720_REG_RTC_ALM1_MON,
> +	BD72720_REG_RTC_ALM1_YEAR,
> +
> +	BD72720_REG_RTC_ALM0_EN,
> +	BD72720_REG_RTC_ALM1_EN,
> +	BD72720_REG_RTC_ALM2,
> +
> +	BD72720_REG_INT_LVL1_EN		= 0xc0,
> +#define BD72720_MASK_LVL1_EN_ALL	GENMASK(7, 0)
> +	BD72720_REG_INT_PS1_EN,
> +	BD72720_REG_INT_PS2_EN,
> +	BD72720_REG_INT_DVS1_EN,
> +	BD72720_REG_INT_DVS2_EN,
> +	BD72720_REG_INT_VBUS_EN,
> +	BD72720_REG_INT_VSYS_EN,
> +	BD72720_REG_INT_CHG_EN,
> +	BD72720_REG_INT_BAT1_EN,
> +	BD72720_REG_INT_BAT2_EN,
> +	BD72720_REG_INT_IBAT_EN,
> +	BD72720_REG_INT_ETC1_EN,
> +	BD72720_REG_INT_ETC2_EN,
> +
> +	/*
> +	 * The _STAT registers inform IRQ line state, and are used to ack IRQ.
> +	 * The _SRC registers below indicate current state of the function
> +	 * connected to the line.
> +	 */
> +	BD72720_REG_INT_LVL1_STAT,
> +	BD72720_REG_INT_PS1_STAT,
> +	BD72720_REG_INT_PS2_STAT,
> +	BD72720_REG_INT_DVS1_STAT,
> +	BD72720_REG_INT_DVS2_STAT,
> +	BD72720_REG_INT_VBUS_STAT,
> +	BD72720_REG_INT_VSYS_STAT,
> +	BD72720_REG_INT_CHG_STAT,
> +	BD72720_REG_INT_BAT1_STAT,
> +	BD72720_REG_INT_BAT2_STAT,
> +	BD72720_REG_INT_IBAT_STAT,
> +	BD72720_REG_INT_ETC1_STAT,
> +	BD72720_REG_INT_ETC2_STAT,
> +
> +	BD72720_REG_INT_LVL1_SRC,
> +	BD72720_REG_INT_PS1_SRC,
> +	BD72720_REG_INT_PS2_SRC,
> +	BD72720_REG_INT_DVS1_SRC,
> +	BD72720_REG_INT_DVS2_SRC,
> +	BD72720_REG_INT_VBUS_SRC,
> +#define BD72720_MASK_DCIN_DET	BIT(1)
> +	BD72720_REG_INT_VSYS_SRC,
> +	BD72720_REG_INT_CHG_SRC,
> +	BD72720_REG_INT_BAT1_SRC,
> +	BD72720_REG_INT_BAT2_SRC,
> +	BD72720_REG_INT_IBAT_SRC,
> +	BD72720_REG_INT_ETC1_SRC,
> +	BD72720_REG_INT_ETC2_SRC,
> +};
> +
> +/* Register masks */
> +#define BD72720_MASK_DEEP_IDLE_EN	BIT(0)
> +#define BD72720_MASK_IDLE_EN		BIT(1)
> +#define BD72720_MASK_SUSPEND_EN		BIT(2)
> +#define BD72720_MASK_RUN_B_EN		BIT(3)
> +#define BD72720_MASK_RUN_0_EN		BIT(4)
> +#define BD72720_MASK_RUN_1_EN		BIT(5)
> +#define BD72720_MASK_RUN_2_EN		BIT(6)
> +#define BD72720_MASK_RUN_3_EN		BIT(7)
> +
> +#define BD72720_MASK_RAMP_UP_DELAY	GENMASK(7, 6)
> +#define BD72720_MASK_BUCK_VSEL		GENMASK(7, 0)
> +#define BD72720_MASK_LDO12346_VSEL	GENMASK(6, 0)
> +#define BD72720_MASK_LDO_VSEL		GENMASK(7, 0)
> +
> +#define BD72720_I2C4C_ADDR_OFFSET	0x100
> +
> +/* Registers behind I2C slave 0x4c */
> +enum {
> +	BD72720_REG_CHG_STATE = BD72720_I2C4C_ADDR_OFFSET,
> +	BD72720_REG_CHG_LAST_STATE,
> +	BD72720_REG_CHG_VBUS_STAT,
> +	BD72720_REG_CHG_VSYS_STAT,
> +	BD72720_REG_CHG_BAT_TEMP_STAT,
> +	BD72720_REG_CHG_WDT_STAT,
> +	BD72720_REG_CHG_ILIM_STAT,
> +	BD72720_REG_CHG_CHG_STAT,
> +	BD72720_REG_CHG_EN,
> +	BD72720_REG_CHG_INIT,
> +	BD72720_REG_CHG_CTRL,
> +	BD72720_REG_CHG_SET_1,
> +	BD72720_REG_CHG_SET_2,
> +	BD72720_REG_CHG_SET_3,
> +	BD72720_REG_CHG_VPRE,
> +	BD72720_REG_CHG_VBAT_1,
> +	BD72720_REG_CHG_VBAT_2,
> +	BD72720_REG_CHG_VBAT_3,
> +	BD72720_REG_CHG_VBAT_4,
> +	BD72720_REG_CHG_BAT_SET_1,
> +	BD72720_REG_CHG_BAT_SET_2,
> +	BD72720_REG_CHG_BAT_SET_3,
> +	BD72720_REG_CHG_IPRE,
> +	BD72720_REG_CHG_IFST_TERM,
> +	BD72720_REG_CHG_VSYS_REG,
> +	BD72720_REG_CHG_VBUS_SET,
> +	BD72720_REG_CHG_WDT_PRE,
> +	BD72720_REG_CHG_WDT_FST,
> +	BD72720_REG_CHG_LED_CTRL,
> +	BD72720_REG_CHG_CFG_1,
> +	BD72720_REG_CHG_IFST_1,
> +	BD72720_REG_CHG_IFST_2,
> +	BD72720_REG_CHG_IFST_3,
> +	BD72720_REG_CHG_IFST_4,
> +	BD72720_REG_CHG_S_CFG_1,
> +	BD72720_REG_CHG_S_CFG_2,
> +	BD72720_REG_RS_VBUS,
> +	BD72720_REG_RS_IBUS,
> +	BD72720_REG_RS_VSYS,
> +	BD72720_REG_VSYS_STATE_STAT,	/* 0x27 + offset*/
> +
> +	BD72720_REG_VM_VBAT_U		= BD72720_I2C4C_ADDR_OFFSET + 0x30,
> +	BD72720_REG_VM_VBAT_L,
> +	BD72720_REG_VM_OCV_PRE_U,
> +	BD72720_REG_VM_OCV_PRE_L,
> +	BD72720_REG_VM_OCV_PST_U,
> +	BD72720_REG_VM_OCV_PST_L,
> +	BD72720_REG_VM_OCV_PWRON_U,
> +	BD72720_REG_VM_OCV_PWRON_L,
> +	BD72720_REG_VM_DVBAT_IMP_U,
> +	BD72720_REG_VM_DVBAT_IMP_L,
> +	BD72720_REG_VM_SA_VBAT_U,
> +	BD72720_REG_VM_SA_VBAT_L,
> +	BD72720_REG_VM_SA_VBAT_MIN_U,
> +	BD72720_REG_VM_SA_VBAT_MIN_L,
> +	BD72720_REG_VM_SA_VBAT_MAX_U,
> +	BD72720_REG_VM_SA_VBAT_MAX_L,
> +	BD72720_REG_REX_SA_VBAT_U,
> +	BD72720_REG_REX_SA_VBAT_L,
> +	BD72720_REG_VM_VSYS_U,
> +	BD72720_REG_VM_VSYS_L,
> +	BD72720_REG_VM_SA_VSYS_U,
> +	BD72720_REG_VM_SA_VSYS_L,
> +	BD72720_REG_VM_SA_VSYS_MIN_U,
> +	BD72720_REG_VM_SA_VSYS_MIN_L,
> +	BD72720_REG_VM_SA_VSYS_MAX_U,
> +	BD72720_REG_VM_SA_VSYS_MAX_L,
> +	BD72720_REG_VM_SA2_VSYS_U,
> +	BD72720_REG_VM_SA2_VSYS_L,
> +	BD72720_REG_VM_VBUS_U,
> +#define BD72720_MASK_VDCIN_U	GENMASK(3, 0)
> +	BD72720_REG_VM_VBUS_L,
> +	BD72720_REG_VM_BATID_U,
> +	BD72720_REG_VM_BATID_L,
> +	BD72720_REG_VM_BATID_NOLOAD_U,
> +	BD72720_REG_VM_BATID_NOLOAD_L,
> +	BD72720_REG_VM_BATID_OFS_U,
> +	BD72720_REG_VM_BATID_OFS_L,
> +	BD72720_REG_VM_VTH_U,
> +	BD72720_REG_VM_VTH_L,
> +	BD72720_REG_VM_VTH_CORR_U,
> +	BD72720_REG_VM_VTH_CORR_L,
> +	BD72720_REG_VM_BTMP_U,
> +	BD72720_REG_VM_BTMP_L,
> +	BD72720_REG_VM_BTMP_IMP_U,
> +	BD72720_REG_VM_BTMP_IMP_L,
> +	BD72720_REG_VM_VF_U,
> +	BD72720_REG_VM_VF_L,
> +	BD72720_REG_VM_BATID_TH_U,
> +	BD72720_REG_VM_BATID_TH_L,
> +	BD72720_REG_VM_BTMP_OV_THR,
> +	BD72720_REG_VM_BTMP_OV_DUR,
> +	BD72720_REG_VM_BTMP_LO_THR,
> +	BD72720_REG_VM_BTMP_LO_DUR,
> +	BD72720_REG_ALM_VBAT_TH_U,
> +	BD72720_REG_ALM_VBAT_TH_L,
> +	BD72720_REG_ALM_VSYS_TH,
> +	BD72720_REG_ALM_VBUS_TH,
> +	BD72720_REG_ALM_VF_TH,
> +	BD72720_REG_VSYS_MAX,
> +	BD72720_REG_VSYS_MIN,
> +	BD72720_REG_VM_VSYS_SA_MINMAX_CTRL,
> +	BD72720_REG_VM_SA_CFG,		/* 0x6c + offset*/
> +
> +	BD72720_REG_CC_CURCD_U		= BD72720_I2C4C_ADDR_OFFSET + 0x70,
> +	BD72720_REG_CC_CURCD_L,
> +	BD72720_REG_CC_CURCD_IMP_U,
> +	BD72720_REG_CC_CURCD_IMP_L,
> +	BD72720_REG_CC_SA_CURCD_U,
> +	BD72720_REG_CC_SA_CURCD_L,
> +	BD72720_REG_CC_OCUR_MON,
> +	BD72720_REG_CC_CCNTD_3,
> +	BD72720_REG_CC_CCNTD_2,
> +	BD72720_REG_CC_CCNTD_1,
> +	BD72720_REG_CC_CCNTD_0,
> +	BD72720_REG_REX_CCNTD_3,
> +	BD72720_REG_REX_CCNTD_2,
> +	BD72720_REG_REX_CCNTD_1,
> +	BD72720_REG_REX_CCNTD_0,
> +	BD72720_REG_FULL_CCNTD_3,
> +	BD72720_REG_FULL_CCNTD_2,
> +	BD72720_REG_FULL_CCNTD_1,
> +	BD72720_REG_FULL_CCNTD_0,
> +	BD72720_REG_CCNTD_CHG_3,
> +	BD72720_REG_CCNTD_CHG_2,
> +	BD72720_REG_CC_STAT,
> +	BD72720_REG_CC_CTRL,
> +	BD72720_REG_CC_OCUR_THR_1,
> +	BD72720_REG_CC_OCUR_THR_2,
> +	BD72720_REG_CC_OCUR_THR_3,
> +	BD72720_REG_REX_CURCD_TH,
> +	BD72720_REG_CC_BATCAP1_TH_U,
> +	BD72720_REG_CC_BATCAP1_TH_L,
> +	BD72720_REG_CC_BATCAP2_TH_U,
> +	BD72720_REG_CC_BATCAP2_TH_L,
> +	BD72720_REG_CC_BATCAP3_TH_U,
> +	BD72720_REG_CC_BATCAP3_TH_L,
> +	BD72720_REG_CC_CCNTD_CTRL,
> +	BD72720_REG_CC_SA_CFG,		/* 0x92 + offset*/
> +	BD72720_REG_IMPCHK_CTRL		= BD72720_I2C4C_ADDR_OFFSET + 0xa0,
> +};
> +
> +#endif /* __LINUX_MFD_BD72720_H */
> diff --git a/include/linux/mfd/rohm-generic.h b/include/linux/mfd/rohm-generic.h
> index 579e8dcfcca4..0a284919a6c3 100644
> --- a/include/linux/mfd/rohm-generic.h
> +++ b/include/linux/mfd/rohm-generic.h
> @@ -16,6 +16,7 @@ enum rohm_chip_type {
>  	ROHM_CHIP_TYPE_BD71828,
>  	ROHM_CHIP_TYPE_BD71837,
>  	ROHM_CHIP_TYPE_BD71847,
> +	ROHM_CHIP_TYPE_BD72720,
>  	ROHM_CHIP_TYPE_BD96801,
>  	ROHM_CHIP_TYPE_BD96802,
>  	ROHM_CHIP_TYPE_BD96805,
> -- 
> 2.51.1
> 



-- 
Lee Jones [李琼斯]

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