[v3,12/23] mfd: Add new driver for MAX77705 PMIC

diff --git a/MAINTAINERS b/MAINTAINERS
index fae3b8ea9ce4..f66f08825db9 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13690,6 +13690,7 @@  F:	drivers/*/*max77843.c
 F:	drivers/*/max14577*.c
 F:	drivers/*/max77686*.c
 F:	drivers/*/max77693*.c
+F:	drivers/*/max77705*.c
 F:	drivers/clk/clk-max77686.c
 F:	drivers/extcon/extcon-max14577.c
 F:	drivers/extcon/extcon-max77693.c
@@ -13697,6 +13698,7 @@  F:	drivers/rtc/rtc-max77686.c
 F:	include/linux/mfd/max14577*.h
 F:	include/linux/mfd/max77686*.h
 F:	include/linux/mfd/max77693*.h
+F:	include/linux/mfd/max77705*.h
 
 MAXIRADIO FM RADIO RECEIVER DRIVER
 M:	Hans Verkuil <hverkuil@xs4all.nl>
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 266b4f54af60..c4eb8ff2dcad 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -880,6 +880,18 @@  config MFD_MAX77693
 	  additional drivers must be enabled in order to use the functionality
 	  of the device.
 
+config MFD_MAX77705
+	tristate "Maxim Semiconductor MAX77705 PMIC Support"
+	depends on I2C
+	select MFD_CORE
+	help
+	  Say yes here to add support for Maxim Semiconductor MAX77705.
+	  This is a Power Management IC with Charger, safe LDOs, Flash, Haptic
+	  and MUIC controls on chip.
+	  This driver provides common support for accessing the device;
+	  additional drivers must be enabled in order to use the functionality
+	  of the device.
+
 config MFD_MAX77714
 	tristate "Maxim Semiconductor MAX77714 PMIC Support"
 	depends on I2C
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index db1ba39de3b5..bf65cc36d59c 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -162,6 +162,8 @@  obj-$(CONFIG_MFD_MAX77620)	+= max77620.o
 obj-$(CONFIG_MFD_MAX77650)	+= max77650.o
 obj-$(CONFIG_MFD_MAX77686)	+= max77686.o
 obj-$(CONFIG_MFD_MAX77693)	+= max77693.o
+max77705-objs := max77705-core.o max77705-irq.o
+obj-$(CONFIG_MFD_MAX77705)	+= max77705.o
 obj-$(CONFIG_MFD_MAX77714)	+= max77714.o
 obj-$(CONFIG_MFD_MAX77843)	+= max77843.o
 obj-$(CONFIG_MFD_MAX8907)	+= max8907.o
@@ -226,6 +228,7 @@  obj-$(CONFIG_MFD_RK8XX_I2C)	+= rk8xx-i2c.o
 obj-$(CONFIG_MFD_RK8XX_SPI)	+= rk8xx-spi.o
 obj-$(CONFIG_MFD_RN5T618)	+= rn5t618.o
 obj-$(CONFIG_MFD_SEC_CORE)	+= sec-core.o sec-irq.o
+obj-$(CONFIG_MFD_S2DOS05)	+= s2dos05.o
 obj-$(CONFIG_MFD_SYSCON)	+= syscon.o
 obj-$(CONFIG_MFD_LM3533)	+= lm3533-core.o lm3533-ctrlbank.o
 obj-$(CONFIG_MFD_VEXPRESS_SYSREG)	+= vexpress-sysreg.o
diff --git a/drivers/mfd/max77705-core.c b/drivers/mfd/max77705-core.c
new file mode 100644
index 000000000000..7cb71a0a9688
--- /dev/null
+++ b/drivers/mfd/max77705-core.c
@@ -0,0 +1,278 @@ 
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * max77705.c - mfd core driver for the Maxim 77705
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Copyright (C) 2024 Dzmitry Sankouski <dsankouski@gmail.com>
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/mutex.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max77705.h>
+#include <linux/mfd/max77705-private.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/debugfs.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+
+#define I2C_ADDR_PMIC	(0xCC >> 1)	/* Top sys, Haptic */
+#define I2C_ADDR_MUIC	(0x4A >> 1)
+#define I2C_ADDR_CHG    (0xD2 >> 1)
+#define I2C_ADDR_FG     (0x6C >> 1)
+#define I2C_ADDR_DEBUG  (0xC4 >> 1)
+
+static struct dentry *debugfs_file;
+
+static int max77705_debugfs_show(struct seq_file *s, void *data)
+{
+	struct max77705_dev *max77705 = s->private;
+	struct regmap *regmap = max77705->regmap;
+	unsigned int i, reg, reg_data, pmic_id, pmic_rev;
+	int regs[] = {
+		MAX77705_PMIC_REG_MAINCTRL1,
+		MAX77705_PMIC_REG_MCONFIG,
+		MAX77705_PMIC_REG_MCONFIG2,
+		MAX77705_PMIC_REG_INTSRC,
+		MAX77705_PMIC_REG_INTSRC_MASK,
+		MAX77705_PMIC_REG_SYSTEM_INT,
+		MAX77705_PMIC_REG_SYSTEM_INT_MASK,
+		MAX77705_RGBLED_REG_LEDEN,
+		MAX77705_RGBLED_REG_LED0BRT,
+		MAX77705_RGBLED_REG_LED1BRT,
+		MAX77705_RGBLED_REG_LED2BRT,
+		MAX77705_RGBLED_REG_LED3BRT,
+		MAX77705_RGBLED_REG_LEDBLNK
+	};
+
+	regmap_read(regmap, MAX77705_PMIC_REG_PMICID1, &pmic_id);
+	regmap_read(regmap, MAX77705_PMIC_REG_PMICREV, &pmic_rev);
+	seq_printf(s, "MAX77705, pmic id: %d, pmic rev: %d\n",
+		   pmic_id, pmic_rev);
+	seq_puts(s, "===================\n");
+	for (i = 0; i < ARRAY_SIZE(regs); i++) {
+		reg = regs[i];
+		regmap_read(regmap, reg, &reg_data);
+		seq_printf(s, "0x%02x:\t0x%02x\n", reg, reg_data);
+	}
+
+	seq_puts(s, "\n");
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(max77705_debugfs);
+
+static const struct regmap_config max77705_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = MAX77705_PMIC_REG_END,
+};
+
+static const struct regmap_config max77705_leds_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = MAX77705_LED_REG_END,
+};
+
+static const struct regmap_config max77705_fg_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = MAX77705_FG_END,
+};
+
+static struct mfd_cell max77705_devs[] = {
+	{
+		.name = "leds-max77705-rgb",
+		.of_compatible = "maxim,max77705-led",
+	},
+	{
+		.name = "max77705-fuelgauge",
+		.of_compatible = "maxim,max77705-fg",
+	},
+	{
+		.name = "max77705-charger",
+		.of_compatible = "maxim,max77705-charger",
+	},
+	{
+		.name = "max77705-haptic",
+		.of_compatible = "maxim,max77705-haptic",
+	},
+};
+
+static int max77705_i2c_probe(struct i2c_client *i2c)
+{
+	struct max77705_dev *max77705;
+	struct max77705_platform_data *pdata = i2c->dev.platform_data;
+
+	unsigned int reg_data;
+	int ret = 0;
+
+	max77705 = kzalloc(sizeof(struct max77705_dev), GFP_KERNEL);
+	if (!max77705)
+		return -ENOMEM;
+
+	max77705->pdata = pdata;
+	max77705->dev = &i2c->dev;
+	max77705->i2c = i2c;
+	max77705->irq = i2c->irq;
+
+	max77705->regmap = devm_regmap_init_i2c(max77705->i2c, &max77705_regmap_config);
+	if (IS_ERR(max77705->regmap)) {
+		ret = PTR_ERR(max77705->regmap);
+		dev_err(max77705->dev, "failed to allocate register map: %d\n",
+				ret);
+		return ret;
+	}
+
+	max77705->regmap_leds = devm_regmap_init_i2c(max77705->i2c, &max77705_leds_regmap_config);
+	if (IS_ERR(max77705->regmap_leds)) {
+		ret = PTR_ERR(max77705->regmap_leds);
+		dev_err(max77705->dev, "failed to allocate register map: %d\n",
+				ret);
+		return ret;
+	}
+
+	i2c_set_clientdata(i2c, max77705);
+
+	if (regmap_read(max77705->regmap, MAX77705_PMIC_REG_PMICREV, &reg_data) < 0) {
+		dev_err(max77705->dev,
+			"device not found on this channel (this is not an error)\n");
+		ret = -ENODEV;
+		goto err;
+	} else {
+		/* print rev */
+		max77705->pmic_rev = (reg_data & MAX77705_REVISION_MASK);
+		max77705->pmic_ver = ((reg_data & MAX77705_VERSION_MASK) >> MAX77705_VERSION_SHIFT);
+		dev_info(max77705->dev, "%s device found: rev.0x%x, ver.0x%x\n",
+				__func__, max77705->pmic_rev, max77705->pmic_ver);
+	}
+
+	max77705->charger = devm_i2c_new_dummy_device(max77705->dev, i2c->adapter, I2C_ADDR_CHG);
+	i2c_set_clientdata(max77705->charger, max77705);
+	max77705->regmap_charger = devm_regmap_init_i2c(max77705->charger, &max77705_regmap_config);
+	if (IS_ERR(max77705->regmap)) {
+		ret = PTR_ERR(max77705->regmap);
+		dev_err(max77705->dev, "failed to allocate register map: %d\n",
+				ret);
+		return ret;
+	}
+
+	max77705->fuelgauge = devm_i2c_new_dummy_device(max77705->dev, i2c->adapter, I2C_ADDR_FG);
+	i2c_set_clientdata(max77705->fuelgauge, max77705);
+	max77705->regmap_fg = devm_regmap_init_i2c(max77705->fuelgauge, &max77705_fg_regmap_config);
+	if (IS_ERR(max77705->regmap_fg)) {
+		ret = PTR_ERR(max77705->regmap_fg);
+		dev_err(max77705->dev, "failed to allocate register map: %d\n",
+				ret);
+		return ret;
+	}
+
+	if (likely(i2c->irq > 0))
+		max77705->irq = i2c->irq;
+	else {
+		dev_err(max77705->dev, "failed to get irq number\n");
+		return -EINVAL;
+	}
+
+	max77705->irq_base = irq_alloc_descs(-1, 0, MAX77705_IRQ_NR, -1);
+	if (unlikely(max77705->irq_base < 0)) {
+		dev_err(max77705->dev, "irq_alloc_descs fail: %d\n", max77705->irq_base);
+		ret = -EINVAL;
+		goto err;
+	}
+
+	disable_irq(max77705->irq);
+	ret = max77705_irq_init(max77705);
+	if (ret) {
+		dev_err(max77705->dev, "failed to init irq system: %d\n", ret);
+		return ret;
+	}
+
+	ret = mfd_add_devices(max77705->dev, -1, max77705_devs,
+			ARRAY_SIZE(max77705_devs), NULL, 0, NULL);
+	if (ret < 0)
+		goto err_mfd;
+
+	debugfs_file = debugfs_create_file("max77705-regs",
+				0664, NULL, (void *)max77705,
+				  &max77705_debugfs_fops);
+	if (!debugfs_file)
+		dev_err(max77705->dev, "Failed to create debugfs file\n");
+
+	device_init_wakeup(max77705->dev, true);
+
+	return ret;
+
+err_mfd:
+	mfd_remove_devices(max77705->dev);
+err:
+	kfree(max77705);
+	return ret;
+}
+
+static void max77705_i2c_remove(struct i2c_client *i2c)
+{
+	struct max77705_dev *max77705 = i2c_get_clientdata(i2c);
+
+	if (debugfs_file)
+		debugfs_remove(debugfs_file);
+
+	device_init_wakeup(max77705->dev, 0);
+	mfd_remove_devices(max77705->dev);
+}
+
+static int __maybe_unused max77705_suspend(struct device *dev)
+{
+	struct i2c_client *i2c = to_i2c_client(dev);
+	struct max77705_dev *max77705 = i2c_get_clientdata(i2c);
+
+	disable_irq(max77705->irq);
+	if (device_may_wakeup(dev))
+		enable_irq_wake(max77705->irq);
+
+	return 0;
+}
+
+static int __maybe_unused max77705_resume(struct device *dev)
+{
+	struct i2c_client *i2c = to_i2c_client(dev);
+	struct max77705_dev *max77705 = i2c_get_clientdata(i2c);
+
+	if (device_may_wakeup(dev))
+		disable_irq_wake(max77705->irq);
+	enable_irq(max77705->irq);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(max77705_pm, max77705_suspend, max77705_resume);
+
+static const struct of_device_id max77705_i2c_dt_ids[] = {
+	{ .compatible = "maxim,max77705" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, max77705_i2c_dt_ids);
+
+static struct i2c_driver max77705_i2c_driver = {
+	.driver		= {
+		.name	= MFD_DEV_NAME,
+		.pm = &max77705_pm,
+		.of_match_table	= max77705_i2c_dt_ids,
+		.suppress_bind_attrs = true,
+	},
+	.probe		= max77705_i2c_probe,
+	.remove		= max77705_i2c_remove,
+};
+module_i2c_driver(max77705_i2c_driver);
+
+MODULE_DESCRIPTION("MAXIM 77705 multi-function core driver");
+MODULE_AUTHOR("Dzmitry Sankouski <dsankouski@gmail.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mfd/max77705-irq.c b/drivers/mfd/max77705-irq.c
new file mode 100644
index 000000000000..0da17fc95e18
--- /dev/null
+++ b/drivers/mfd/max77705-irq.c
@@ -0,0 +1,299 @@ 
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * max77705-irq.c - Interrupt controller support for MAX77705
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Copyright (C) 2024 Dzmitry Sankouski <dsankouski@gmail.com>
+ */
+
+#include <linux/err.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/max77705.h>
+#include <linux/mfd/max77705-private.h>
+#include <linux/regmap.h>
+
+static const u8 max77705_mask_reg[] = {
+	[SYS_INT] = MAX77705_PMIC_REG_SYSTEM_INT_MASK,
+	[CHG_INT] = MAX77705_CHG_REG_INT_MASK,
+	[FUEL_INT] = MAX77705_REG_INVALID,
+};
+
+static struct regmap *get_i2c(struct max77705_dev *max77705,
+				enum max77705_irq_source src)
+{
+	switch (src) {
+	case SYS_INT:
+		return max77705->regmap;
+	case FUEL_INT:
+		return max77705->regmap_fg;
+	case CHG_INT:
+		return max77705->regmap_charger;
+	default:
+		return ERR_PTR(-EINVAL);
+	}
+}
+
+struct max77705_irq_data {
+	int mask;
+	enum max77705_irq_source group;
+};
+
+static const struct max77705_irq_data max77705_irqs[] = {
+	[MAX77705_SYSTEM_IRQ_BSTEN_INT] = { .group = SYS_INT, .mask = BIT(3) },
+	[MAX77705_SYSTEM_IRQ_SYSUVLO_INT] = { .group = SYS_INT, .mask = BIT(4) },
+	[MAX77705_SYSTEM_IRQ_SYSOVLO_INT] = { .group = SYS_INT, .mask = BIT(5) },
+	[MAX77705_SYSTEM_IRQ_TSHDN_INT] = { .group = SYS_INT, .mask = BIT(6) },
+	[MAX77705_SYSTEM_IRQ_TM_INT] = { .group = SYS_INT, .mask = BIT(7) },
+
+	[MAX77705_CHG_IRQ_BYP_I] = { .group = CHG_INT, .mask = BIT(0) },
+	[MAX77705_CHG_IRQ_BAT_I] = { .group = CHG_INT, .mask = BIT(3) },
+	[MAX77705_CHG_IRQ_CHG_I] = { .group = CHG_INT, .mask = BIT(4) },
+	[MAX77705_CHG_IRQ_WCIN_I] = { .group = CHG_INT, .mask = BIT(5) },
+	[MAX77705_CHG_IRQ_CHGIN_I] = { .group = CHG_INT, .mask = BIT(6) },
+	[MAX77705_CHG_IRQ_AICL_I] = { .group = CHG_INT, .mask = BIT(7) },
+
+	[MAX77705_FG_IRQ_ALERT] = { .group = FUEL_INT, .mask = BIT(1) },
+};
+
+static void max77705_irq_lock(struct irq_data *data)
+{
+	struct max77705_dev *max77705 = irq_get_chip_data(data->irq);
+
+	mutex_lock(&max77705->irqlock);
+}
+
+static void max77705_irq_sync_unlock(struct irq_data *data)
+{
+	struct max77705_dev *max77705 = irq_get_chip_data(data->irq);
+	int i;
+
+	for (i = 0; i < MAX77705_IRQ_GROUP_NR; i++) {
+		u8 mask_reg = max77705_mask_reg[i];
+		struct regmap *i2c = get_i2c(max77705, i);
+
+		if (mask_reg == MAX77705_REG_INVALID ||
+				IS_ERR_OR_NULL(i2c))
+			continue;
+		max77705->irq_masks_cache[i] = max77705->irq_masks_cur[i];
+
+		regmap_write(i2c, max77705_mask_reg[i],
+				max77705->irq_masks_cur[i]);
+	}
+
+	mutex_unlock(&max77705->irqlock);
+}
+
+static inline void max77705_read_irq_reg(struct regmap *regmap, unsigned int pmic_rev,
+					unsigned int reg, unsigned int *irq_src) {
+	u8 dummy[2] = {0, }; /* for pass1 intr reg clear issue */
+
+	switch (pmic_rev) {
+	case MAX77705_PASS1:
+		regmap_noinc_read(regmap, reg - 1,
+				dummy, sizeof(dummy));
+		*irq_src = (unsigned int) dummy[1];
+		break;
+	case MAX77705_PASS2:
+	case MAX77705_PASS3:
+		regmap_read(regmap, reg,
+				irq_src);
+		break;
+	default:
+		pr_err("%s: PMIC_REVISION(SRC_CHG) isn't valid\n", __func__);
+		break;
+	}
+}
+
+static inline const struct max77705_irq_data *
+irq_to_max77705_irq(struct max77705_dev *max77705, int irq)
+{
+	return &max77705_irqs[irq - max77705->irq_base];
+}
+
+static void max77705_irq_mask(struct irq_data *data)
+{
+	struct max77705_dev *max77705 = irq_get_chip_data(data->irq);
+	const struct max77705_irq_data *irq_data =
+	    irq_to_max77705_irq(max77705, data->irq);
+
+	if (irq_data->group >= MAX77705_IRQ_GROUP_NR)
+		return;
+
+	max77705->irq_masks_cur[irq_data->group] |= irq_data->mask;
+}
+
+static void max77705_irq_unmask(struct irq_data *data)
+{
+	struct max77705_dev *max77705 = irq_get_chip_data(data->irq);
+	const struct max77705_irq_data *irq_data =
+	    irq_to_max77705_irq(max77705, data->irq);
+
+	if (irq_data->group >= MAX77705_IRQ_GROUP_NR)
+		return;
+
+	max77705->irq_masks_cur[irq_data->group] &= ~irq_data->mask;
+}
+
+inline int max77705_irq_mask_subdevice(struct max77705_dev *max77705, unsigned int mask)
+{
+	int ret;
+	unsigned int data;
+
+	ret = regmap_read(max77705->regmap, MAX77705_PMIC_REG_INTSRC_MASK,
+			  &data);
+	if (ret) {
+		dev_err(max77705->dev, "fail to read MAX77705_PMIC_REG_INTSRC_MASK reg\n");
+		return ret;
+	}
+	data |= mask;
+
+	regmap_write(max77705->regmap, MAX77705_PMIC_REG_INTSRC_MASK,
+			   data);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(max77705_irq_mask_subdevice);
+
+inline int max77705_irq_unmask_subdevice(struct max77705_dev *max77705, unsigned int mask)
+{
+	int ret;
+	unsigned int data;
+
+	ret = regmap_read(max77705->regmap, MAX77705_PMIC_REG_INTSRC_MASK,
+			  &data);
+	if (ret) {
+		dev_err(max77705->dev, "fail to read MAX77705_PMIC_REG_INTSRC_MASK reg\n");
+		return ret;
+	}
+	data &= ~(mask);
+
+	regmap_write(max77705->regmap, MAX77705_PMIC_REG_INTSRC_MASK,
+			   data);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(max77705_irq_unmask_subdevice);
+
+static void max77705_irq_disable(struct irq_data *data)
+{
+	max77705_irq_mask(data);
+}
+
+static struct irq_chip max77705_irq_chip = {
+	.name			= MFD_DEV_NAME,
+	.irq_bus_lock		= max77705_irq_lock,
+	.irq_bus_sync_unlock	= max77705_irq_sync_unlock,
+	.irq_mask		= max77705_irq_mask,
+	.irq_unmask		= max77705_irq_unmask,
+	.irq_disable            = max77705_irq_disable,
+};
+
+static irqreturn_t max77705_irq_thread(int irq, void *data)
+{
+	struct max77705_dev *max77705 = data;
+	unsigned int irq_reg[MAX77705_IRQ_GROUP_NR] = {0};
+	unsigned int irq_src;
+	int i, ret;
+	u8 pmic_rev = max77705->pmic_rev;
+
+	max77705->doing_irq = 1;
+
+	ret = regmap_read(max77705->regmap,
+					MAX77705_PMIC_REG_INTSRC, &irq_src);
+	if (ret) {
+		pr_err("%s:%s Failed to read interrupt source: %d\n",
+			MFD_DEV_NAME, __func__, ret);
+
+		max77705->doing_irq = 0;
+		return IRQ_NONE;
+	}
+
+	if (irq_src & MAX77705_IRQSRC_CHG) {
+		max77705_read_irq_reg(max77705->regmap_charger, pmic_rev,
+					MAX77705_CHG_REG_INT, &irq_reg[CHG_INT]);
+		pr_info("%s: charger interrupt(0x%02x)\n",
+				__func__, irq_reg[CHG_INT]);
+	}
+
+	/* Apply masking */
+	for (i = 0; i < MAX77705_IRQ_GROUP_NR; i++)
+		irq_reg[i] &= ~max77705->irq_masks_cur[i];
+
+	/* Report */
+	for (i = 0; i < MAX77705_IRQ_NR; i++) {
+		if (irq_reg[max77705_irqs[i].group] & max77705_irqs[i].mask)
+			handle_nested_irq(max77705->irq_base + i);
+	}
+
+	max77705->doing_irq = 0;
+
+	return IRQ_HANDLED;
+}
+
+int max77705_irq_init(struct max77705_dev *max77705)
+{
+	int i;
+	int ret = 0;
+	int cur_irq;
+
+	if (!max77705->irq_base) {
+		dev_err(max77705->dev, "No interrupt base specified.\n");
+		return 0;
+	}
+
+	mutex_init(&max77705->irqlock);
+
+	/* Mask individual interrupt sources */
+	for (i = 0; i < MAX77705_IRQ_GROUP_NR; i++) {
+		struct regmap *i2c;
+		/* MUIC IRQ  0:MASK 1:NOT MASK => NOT USE */
+		/* Other IRQ 1:MASK 0:NOT MASK */
+		max77705->irq_masks_cur[i] = 0xff;
+		max77705->irq_masks_cache[i] = 0xff;
+
+		i2c = get_i2c(max77705, i);
+
+		if (IS_ERR_OR_NULL(i2c))
+			continue;
+		if (max77705_mask_reg[i] == MAX77705_REG_INVALID)
+			continue;
+		regmap_write(i2c, max77705_mask_reg[i], 0xff);
+	}
+
+	/* Register with genirq */
+	for (i = 0; i < MAX77705_IRQ_NR; i++) {
+		cur_irq = i + max77705->irq_base;
+		irq_set_chip_data(cur_irq, max77705);
+		irq_set_chip_and_handler(cur_irq, &max77705_irq_chip,
+					 handle_level_irq);
+		irq_set_nested_thread(cur_irq, 1);
+#ifdef CONFIG_ARM
+		set_irq_flags(cur_irq, IRQF_VALID);
+#else
+		irq_set_noprobe(cur_irq);
+#endif
+	}
+
+	ret = max77705_irq_mask_subdevice(max77705, MAX77705_IRQSRC_CHG | MAX77705_IRQSRC_TOP |
+					  MAX77705_IRQSRC_FG | MAX77705_IRQSRC_USBC);
+	if (ret) {
+		dev_err(max77705->dev, "Failed to mask subdevice irqs\n");
+		return ret;
+	}
+
+	ret = devm_request_threaded_irq(max77705->dev, max77705->irq, NULL, max77705_irq_thread,
+					IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+					"max77705-irq", max77705);
+	if (ret) {
+		dev_err(max77705->dev, "Failed to request IRQ %d: %d\n",
+				max77705->irq, ret);
+	}
+
+	return ret;
+}
+
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/max77705-private.h b/include/linux/mfd/max77705-private.h
new file mode 100644
index 000000000000..bd6ab9c582b8
--- /dev/null
+++ b/include/linux/mfd/max77705-private.h
@@ -0,0 +1,281 @@ 
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * max77705-private.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __LINUX_MFD_MAX77705_PRIV_H
+#define __LINUX_MFD_MAX77705_PRIV_H
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+
+#define MAX77705_REG_INVALID		(0xff)
+#define MAX77705_IRQSRC_CHG			BIT(0)
+#define MAX77705_IRQSRC_TOP			BIT(1)
+#define MAX77705_IRQSRC_FG			BIT(2)
+#define MAX77705_IRQSRC_USBC		BIT(3)
+
+/* STATUS_REG */
+#define MAX77705_BAT_ABSENT_MASK	BIT(3)
+/* MAX77705 MAINCTRL1 register */
+#define MAX77705_MAINCTRL1_BIASEN_SHIFT		7
+#define MAX77705_MAINCTRL1_BIASEN_MASK		BIT(MAX77705_MAINCTRL1_BIASEN_SHIFT)
+
+/* max77705-haptic configuration register */
+#define MAX77705_CONFIG2_MEN_SHIFT		6
+#define MAX77705_CONFIG2_MODE_SHIFT		7
+#define MAX77705_CONFIG2_HTYP_SHIFT		5
+
+#define MAX77705_REVISION_MASK	7
+#define MAX77705_VERSION_MASK	0xF8
+#define MAX77705_VERSION_SHIFT	3
+
+enum max77705_hw_rev {
+	MAX77705_PASS1 = 1,
+	MAX77705_PASS2,
+	MAX77705_PASS3,
+};
+
+enum max77705_reg {
+	/* Slave addr = 0xCC */
+	/* PMIC Top-Level Registers */
+	MAX77705_PMIC_REG_PMICID1		= 0x00,
+	MAX77705_PMIC_REG_PMICREV		= 0x01,
+	MAX77705_PMIC_REG_MAINCTRL1		= 0x02,
+	MAX77705_PMIC_REG_INTSRC		= 0x22,
+	MAX77705_PMIC_REG_INTSRC_MASK		= 0x23,
+	MAX77705_PMIC_REG_SYSTEM_INT		= 0x24,
+	MAX77705_PMIC_REG_RESERVED_25		= 0x25,
+	MAX77705_PMIC_REG_SYSTEM_INT_MASK	= 0x26,
+	MAX77705_PMIC_REG_RESERVED_27		= 0x27,
+	MAX77705_PMIC_REG_RESERVED_28		= 0x28,
+	MAX77705_PMIC_REG_RESERVED_29		= 0x29,
+	MAX77705_PMIC_REG_BOOSTCONTROL1		= 0x4C,
+	MAX77705_PMIC_REG_BSTOUT_MASK		= 0x03,
+	MAX77705_PMIC_REG_BOOSTCONTROL2		= 0x4F,
+	MAX77705_PMIC_REG_FORCE_EN_MASK		= 0x08,
+	MAX77705_PMIC_REG_SW_RESET		= 0x50,
+	MAX77705_PMIC_REG_USBC_RESET		= 0x51,
+
+	/* Haptic motor driver Registers */
+	MAX77705_PMIC_REG_MCONFIG		= 0x10,
+	MAX77705_PMIC_REG_MCONFIG2		= 0x11,
+
+	MAX77705_CHG_REG_INT			= 0xB0,
+	MAX77705_CHG_REG_INT_MASK		= 0xB1,
+	MAX77705_CHG_REG_INT_OK			= 0xB2,
+	MAX77705_CHG_REG_DETAILS_00		= 0xB3,
+	MAX77705_CHG_REG_DETAILS_01		= 0xB4,
+	MAX77705_CHG_REG_DETAILS_02		= 0xB5,
+	MAX77705_CHG_REG_DTLS_03		= 0xB6,
+	MAX77705_CHG_REG_CNFG_00		= 0xB7,
+	MAX77705_CHG_REG_CNFG_01		= 0xB8,
+	MAX77705_CHG_REG_CNFG_02		= 0xB9,
+	MAX77705_CHG_REG_CNFG_03		= 0xBA,
+	MAX77705_CHG_REG_CNFG_04		= 0xBB,
+	MAX77705_CHG_REG_CNFG_05		= 0xBC,
+	MAX77705_CHG_REG_CNFG_06		= 0xBD,
+	MAX77705_CHG_REG_CNFG_07		= 0xBE,
+	MAX77705_CHG_REG_CNFG_08		= 0xBF,
+	MAX77705_CHG_REG_CNFG_09		= 0xC0,
+	MAX77705_CHG_REG_CNFG_10		= 0xC1,
+	MAX77705_CHG_REG_CNFG_11		= 0xC2,
+	MAX77705_CHG_REG_CNFG_12		= 0xC3,
+	MAX77705_CHG_REG_CNFG_13		= 0xC4,
+	MAX77705_CHG_REG_CNFG_14		= 0xC5,
+	MAX77705_CHG_REG_SAFEOUT_CTRL		= 0xC6,
+
+	MAX77705_PMIC_REG_END,
+};
+
+enum max77705_charger_battery_state {
+	MAX77705_BATTERY_NOBAT,
+	MAX77705_BATTERY_PREQUALIFICATION,
+	MAX77705_BATTERY_DEAD,
+	MAX77705_BATTERY_GOOD,
+	MAX77705_BATTERY_LOWVOLTAGE,
+	MAX77705_BATTERY_OVERVOLTAGE,
+	MAX77705_BATTERY_RESERVED,
+};
+
+enum max77705_charger_charge_type {
+	MAX77705_CHARGER_CONSTANT_CURRENT	= 1,
+	MAX77705_CHARGER_CONSTANT_VOLTAGE,
+	MAX77705_CHARGER_END_OF_CHARGE,
+	MAX77705_CHARGER_DONE,
+};
+
+/* Slave addr = 0x6C : Fuelgauge */
+enum max77705_fuelgauge_reg {
+	STATUS_REG				= 0x00,
+	VALRT_THRESHOLD_REG			= 0x01,
+	TALRT_THRESHOLD_REG			= 0x02,
+	SALRT_THRESHOLD_REG			= 0x03,
+	REMCAP_REP_REG				= 0x05,
+	SOCREP_REG				= 0x06,
+	TEMPERATURE_REG				= 0x08,
+	VCELL_REG				= 0x09,
+	TIME_TO_EMPTY_REG			= 0x11,
+	FULLSOCTHR_REG				= 0x13,
+	CURRENT_REG				= 0x0A,
+	AVG_CURRENT_REG				= 0x0B,
+	SOCMIX_REG				= 0x0D,
+	SOCAV_REG				= 0x0E,
+	REMCAP_MIX_REG				= 0x0F,
+	FULLCAP_REG				= 0x10,
+	RFAST_REG				= 0x15,
+	AVR_TEMPERATURE_REG			= 0x16,
+	CYCLES_REG				= 0x17,
+	DESIGNCAP_REG				= 0x18,
+	AVR_VCELL_REG				= 0x19,
+	TIME_TO_FULL_REG			= 0x20,
+	CONFIG_REG				= 0x1D,
+	ICHGTERM_REG				= 0x1E,
+	REMCAP_AV_REG				= 0x1F,
+	FULLCAP_NOM_REG				= 0x23,
+	LEARN_CFG_REG				= 0x28,
+	FILTER_CFG_REG				= 0x29,
+	MISCCFG_REG				= 0x2B,
+	QRTABLE20_REG				= 0x32,
+	FULLCAP_REP_REG				= 0x35,
+	RCOMP_REG				= 0x38,
+	VEMPTY_REG				= 0x3A,
+	FSTAT_REG				= 0x3D,
+	DISCHARGE_THRESHOLD_REG			= 0x40,
+	QRTABLE30_REG				= 0x42,
+	ISYS_REG				= 0x43,
+	DQACC_REG				= 0x45,
+	DPACC_REG				= 0x46,
+	AVGISYS_REG				= 0x4B,
+	QH_REG					= 0x4D,
+	VSYS_REG				= 0xB1,
+	TALRTTH2_REG				= 0xB2,
+	/* "not used REG(0xB2)" is for checking fuelgague init result. */
+	FG_INIT_RESULT_REG			= TALRTTH2_REG,
+	VBYP_REG				= 0xB3,
+	CONFIG2_REG				= 0xBB,
+	IIN_REG					= 0xD0,
+	OCV_REG					= 0xEE,
+	VFOCV_REG				= 0xFB,
+	VFSOC_REG				= 0xFF,
+
+	MAX77705_FG_END,
+};
+
+enum max77705_irq_source {
+	SYS_INT = 0,
+	CHG_INT,
+	FUEL_INT,
+	MAX77705_IRQ_GROUP_NR,
+};
+
+
+#define MAX77705_REG_MAINCTRL1_BIASEN		BIT(7)
+
+/* Slave addr = 0x94: RGB LED */
+enum max77705_led_reg {
+	MAX77705_RGBLED_REG_LEDEN			= 0x30,
+	MAX77705_RGBLED_REG_LED0BRT			= 0x31,
+	MAX77705_RGBLED_REG_LED1BRT			= 0x32,
+	MAX77705_RGBLED_REG_LED2BRT			= 0x33,
+	MAX77705_RGBLED_REG_LED3BRT			= 0x34,
+	MAX77705_RGBLED_REG_LEDRMP			= 0x36,
+	MAX77705_RGBLED_REG_LEDBLNK			= 0x38,
+	MAX77705_LED_REG_END,
+};
+
+enum max77705_irq {
+	/* PMIC; TOPSYS */
+	MAX77705_SYSTEM_IRQ_BSTEN_INT,
+	MAX77705_SYSTEM_IRQ_SYSUVLO_INT,
+	MAX77705_SYSTEM_IRQ_SYSOVLO_INT,
+	MAX77705_SYSTEM_IRQ_TSHDN_INT,
+	MAX77705_SYSTEM_IRQ_TM_INT,
+
+	/* PMIC; Charger */
+	MAX77705_CHG_IRQ_BYP_I,
+	MAX77705_CHG_IRQ_BAT_I,
+	MAX77705_CHG_IRQ_CHG_I,
+	MAX77705_CHG_IRQ_WCIN_I,
+	MAX77705_CHG_IRQ_CHGIN_I,
+	MAX77705_CHG_IRQ_AICL_I,
+
+	/* Fuelgauge */
+	MAX77705_FG_IRQ_ALERT,
+
+	MAX77705_IRQ_NR,
+};
+
+struct max77705_dev {
+	struct device *dev;
+	struct i2c_client *i2c; /* 0xCC; Haptic, PMIC */
+	struct i2c_client *charger; /* 0xD2; Charger */
+	struct i2c_client *fuelgauge; /* 0x6C; Fuelgauge */
+	struct i2c_client *muic; /* 0x4A; MUIC */
+	struct i2c_client *debug; /* 0xC4; Debug */
+	struct mutex i2c_lock;
+
+	struct regmap *regmap;
+	struct regmap *regmap_fg;
+	struct regmap *regmap_charger;
+	struct regmap *regmap_leds;
+
+	int type;
+
+	int irq;
+	int irq_base;
+	int irq_masks_cur[MAX77705_IRQ_GROUP_NR];
+	int irq_masks_cache[MAX77705_IRQ_GROUP_NR];
+	bool wakeup;
+	struct mutex irqlock;
+
+#ifdef CONFIG_HIBERNATION
+	/* For hibernation */
+	u8 reg_pmic_dump[MAX77705_PMIC_REG_END];
+	u8 reg_muic_dump[MAX77705_USBC_REG_END];
+	u8 reg_led_dump[MAX77705_LED_REG_END];
+#endif
+
+	/* pmic VER/REV register */
+	u8 pmic_rev;	/* pmic Rev */
+	u8 pmic_ver;	/* pmic version */
+
+	u8 cc_booting_complete;
+
+	wait_queue_head_t queue_empty_wait_q;
+	int doing_irq;
+	int is_usbc_queue;
+
+	struct max77705_platform_data *pdata;
+};
+
+enum max77705_types {
+	TYPE_MAX77705,
+};
+
+
+/**
+ * Unmask sub device interrupts on device level
+ *
+ * @param max77705 - device structure
+ * @param mask - sub device interrupts to unmask
+ */
+extern inline int max77705_irq_unmask_subdevice(struct max77705_dev *max77705, unsigned int mask);
+
+/**
+ * Same as max77705_irq_unmask_device, but for masking.
+ */
+extern inline int max77705_irq_mask_subdevice(struct max77705_dev *max77705, unsigned int mask);
+
+
+extern int max77705_irq_init(struct max77705_dev *max77705);
+
+#endif /* __LINUX_MFD_MAX77705_PRIV_H */
diff --git a/include/linux/mfd/max77705.h b/include/linux/mfd/max77705.h
new file mode 100644
index 000000000000..e2d757c77973
--- /dev/null
+++ b/include/linux/mfd/max77705.h
@@ -0,0 +1,20 @@ 
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * max77705.h - Driver for the Maxim 77705
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __MAX77705_H__
+#define __MAX77705_H__
+
+#define MFD_DEV_NAME "max77705"
+
+struct max77705_platform_data {
+	struct power_supply_battery_info *bat_info;
+};
+
+#endif /* __MAX77705_H__ */
+