[PATCH 2/4] mfd: Add initial MFD driver for ATC260x PMICs

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Add initial MFD driver for Actions Semi ATC260x PMICs. ATC260x series
PMICs integrates Audio Codec, Power management, Clock generation, and GPIO
controller blocks. This driver only supports Regulator functionality on
ATC2609A PMIC variant for now.

Since the PMICs can be accessed using both I2C and SPI busses, following
driver structure has been adapted:

           ----->atc260x-core.c (Implements core funtionalities)
          /
ATC260x--------->atc260x-i2c.c (Implements I2C interface)
          \
           ----->atc2609a-helpers.c (Implements ATC2609A specific helpers)

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
---
 drivers/mfd/Kconfig                       |  22 +++
 drivers/mfd/Makefile                      |   7 +
 drivers/mfd/atc2609a-helpers.c            |  91 +++++++++
 drivers/mfd/atc260x-core.c                |  85 ++++++++
 drivers/mfd/atc260x-i2c.c                 |  98 ++++++++++
 drivers/mfd/atc260x.h                     |  22 +++
 include/linux/mfd/atc260x/atc2609a_regs.h | 228 ++++++++++++++++++++++
 include/linux/mfd/atc260x/core.h          |  64 ++++++
 8 files changed, 617 insertions(+)
 create mode 100644 drivers/mfd/atc2609a-helpers.c
 create mode 100644 drivers/mfd/atc260x-core.c
 create mode 100644 drivers/mfd/atc260x-i2c.c
 create mode 100644 drivers/mfd/atc260x.h
 create mode 100644 include/linux/mfd/atc260x/atc2609a_regs.h
 create mode 100644 include/linux/mfd/atc260x/core.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index a17d275bf1d4..eb388505357b 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1945,6 +1945,28 @@ config MFD_STMFX
 	  additional drivers must be enabled in order to use the functionality
 	  of the device.
 
+config MFD_ATC260X
+	tristate "Actions Semi ATC260x PMICs"
+	select MFD_CORE
+	select REGMAP
+	select REGMAP_IRQ
+	help
+	  Support for the Actions Semi ATC260x PMICs.
+
+config MFD_ATC260X_I2C
+	tristate "Actions Semi ATC260x PMICs with I2C"
+	depends on MFD_ATC260X
+	depends on I2C
+	select REGMAP_I2C
+	help
+	  Support for the Actions Semi ATC260x PMICs controlled via I2C.
+
+config MFD_ATC2609A
+	bool "Actions Semi ATC2609A PMIC"
+	depends on MFD_ATC260X
+	help
+	  Support for Actions Semi ATC2609A PMIC
+
 menu "Multimedia Capabilities Port drivers"
 	depends on ARCH_SA1100
 
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 52b1a90ff515..a87e7ed55a02 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -249,3 +249,10 @@ 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_STMFX) 	+= stmfx.o
+
+atc260x-objs			:= atc260x-core.o
+ifeq ($(CONFIG_MFD_ATC2609A),y)
+atc260x-objs			+= atc2609a-helpers.o
+endif
+obj-$(CONFIG_MFD_ATC260X)	+= atc260x.o
+obj-$(CONFIG_MFD_ATC260X_I2C)	+= atc260x-i2c.o
diff --git a/drivers/mfd/atc2609a-helpers.c b/drivers/mfd/atc2609a-helpers.c
new file mode 100644
index 000000000000..6d304ea61552
--- /dev/null
+++ b/drivers/mfd/atc2609a-helpers.c
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Helper functions for ATC2609A PMIC
+ *
+ * Copyright (C) 2019 Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
+ */
+
+#include <linux/mfd/atc260x/core.h>
+#include <linux/mfd/core.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+#include "atc260x.h"
+
+const struct regmap_config atc2609a_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 16,
+	.max_register = ATC2609A_SADDR,
+	.cache_type = REGCACHE_NONE,
+};
+
+const struct regmap_irq atc2609a_irqs[] = {
+	[ATC2609A_IRQ_AUDIO] = {
+		.reg_offset = 0,
+		.mask = BIT(0),
+	},
+	[ATC2609A_IRQ_OV] = {
+		.reg_offset = 0,
+		.mask = BIT(1),
+	},
+	[ATC2609A_IRQ_OC] = {
+		.reg_offset = 0,
+		.mask = BIT(2),
+	},
+	[ATC2609A_IRQ_OT] = {
+		.reg_offset = 0,
+		.mask = BIT(3),
+	},
+	[ATC2609A_IRQ_UV] = {
+		.reg_offset = 0,
+		.mask = BIT(4),
+	},
+	[ATC2609A_IRQ_ALARM] = {
+		.reg_offset = 0,
+		.mask = BIT(5),
+	},
+	[ATC2609A_IRQ_ONOFF] = {
+		.reg_offset = 0,
+		.mask = BIT(6),
+	},
+	[ATC2609A_IRQ_WKUP] = {
+		.reg_offset = 0,
+		.mask = BIT(7),
+	},
+	[ATC2609A_IRQ_IR] = {
+		.reg_offset = 0,
+		.mask = BIT(8),
+	},
+	[ATC2609A_IRQ_REMCON] = {
+		.reg_offset = 0,
+		.mask = BIT(9),
+	},
+	[ATC2609A_IRQ_POWER_IN] = {
+		.reg_offset = 0,
+		.mask = BIT(10),
+	},
+};
+
+const struct regmap_irq_chip atc2609a_regmap_irq_chip = {
+	.name = "atc2609a",
+	.irqs = atc2609a_irqs,
+	.num_irqs = ARRAY_SIZE(atc2609a_irqs),
+	.num_regs = 1,
+	.status_base = ATC2609A_INTS_PD,
+	.mask_base = ATC2609A_INTS_MSK,
+	.mask_invert = true,
+};
+
+int atc2609a_dev_init(struct atc260x *atc260x)
+{
+	/* Initialize interrupt block */
+	atc260x_cmu_reset(atc260x, ATC2609A_CMU_DEVRST, ATC260X_CMU_INTS,
+			  ATC260X_CMU_INTS);
+
+	/* Disable all interrupt sources */
+	regmap_write(atc260x->regmap, ATC2609A_INTS_MSK, 0);
+
+	/* Enable EXTIRQ pad */
+	return regmap_update_bits(atc260x->regmap, ATC2609A_PAD_EN,
+				  BIT(0), BIT(0));
+}
diff --git a/drivers/mfd/atc260x-core.c b/drivers/mfd/atc260x-core.c
new file mode 100644
index 000000000000..e65f1cb2648b
--- /dev/null
+++ b/drivers/mfd/atc260x-core.c
@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Core MFD support for ATC260x PMICs
+ *
+ * Copyright (C) 2019 Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
+ */
+
+#include <linux/interrupt.h>
+#include <linux/mfd/atc260x/core.h>
+#include <linux/mfd/core.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+#include "atc260x.h"
+
+void atc260x_cmu_reset(struct atc260x *atc260x, u32 reg, u8 mask, u32 bit)
+{
+	/* Assert reset */
+	regmap_update_bits(atc260x->regmap, reg, mask, ~bit);
+
+	/* De-assert reset */
+	regmap_update_bits(atc260x->regmap, reg, mask, bit);
+}
+
+int atc260x_core_init(struct atc260x *atc260x)
+{
+	struct device *dev = atc260x->dev;
+	unsigned int chip_rev;
+	int ret;
+
+	if (!atc260x->irq) {
+		dev_err(dev, "No interrupt support\n");
+		return -EINVAL;
+	}
+
+	/* Initialize the hardware */
+	atc260x->dev_init(atc260x);
+
+	ret = regmap_read(atc260x->regmap, atc260x->rev_reg, &chip_rev);
+	if (ret) {
+		dev_err(dev, "Failed to read revision register\n");
+		return ret;
+	}
+
+	if (chip_rev < 0 || chip_rev > 31) {
+		dev_err(dev, "Unknown chip revision: %d\n", ret);
+		return -EINVAL;
+	}
+
+	chip_rev = __ffs(chip_rev + 1U);
+
+	dev_info(dev, "%s chip revision: %d\n", atc260x->type_name, chip_rev);
+
+	ret = regmap_add_irq_chip(atc260x->regmap, atc260x->irq,
+				  IRQF_ONESHOT, -1,
+				  atc260x->regmap_irq_chip, &atc260x->irq_data);
+	if (ret) {
+		dev_err(dev, "Failed to add irq_chip %d\n", ret);
+		return ret;
+	}
+
+	ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
+				   atc260x->cells, atc260x->nr_cells, NULL, 0,
+				   regmap_irq_get_domain(atc260x->irq_data));
+	if (ret) {
+		dev_err(dev, "Failed to add MFD devices %d\n", ret);
+		goto err_irq;
+	}
+
+	return 0;
+
+err_irq:
+	regmap_del_irq_chip(atc260x->irq, atc260x->irq_data);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(atc260x_core_init);
+
+int atc260x_core_exit(struct atc260x *atc260x)
+{
+	regmap_del_irq_chip(atc260x->irq, atc260x->irq_data);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(atc260x_core_exit);
diff --git a/drivers/mfd/atc260x-i2c.c b/drivers/mfd/atc260x-i2c.c
new file mode 100644
index 000000000000..3b7e8c1f5ac5
--- /dev/null
+++ b/drivers/mfd/atc260x-i2c.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * I2C bus interface for ATC260x PMICs
+ *
+ * Copyright (C) 2019 Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
+ */
+
+#include <linux/i2c.h>
+#include <linux/mfd/atc260x/core.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+
+#include "atc260x.h"
+
+const struct mfd_cell atc2609a_mfd_cells[] = {
+	{ .name = "atc260x-regulator", },
+};
+
+static int atc260x_i2c_probe(struct i2c_client *client,
+			     const struct i2c_device_id *id)
+{
+	struct atc260x *atc260x;
+	const void *of_data;
+	unsigned long atc260x_type;
+
+	atc260x = devm_kzalloc(&client->dev, sizeof(*atc260x), GFP_KERNEL);
+	if (!atc260x)
+		return -ENOMEM;
+
+	of_data = of_device_get_match_data(&client->dev);
+	if (!of_data)
+		return -ENODEV;
+
+	atc260x_type = (unsigned long)of_data;
+
+	switch (atc260x_type) {
+	case ATC2609A:
+		atc260x->regmap_cfg = &atc2609a_regmap_config;
+		atc260x->regmap_irq_chip = &atc2609a_regmap_irq_chip;
+		atc260x->cells = atc2609a_mfd_cells;
+		atc260x->nr_cells = ARRAY_SIZE(atc2609a_mfd_cells);
+		atc260x->type_name = "atc2609a";
+		atc260x->rev_reg = ATC2609A_CHIP_VER;
+		atc260x->dev_init = atc2609a_dev_init;
+		break;
+	default:
+		dev_err(&client->dev,
+			"Unsupported ATC260x I2C device type %ld\n",
+			atc260x_type);
+		return -EINVAL;
+	}
+
+	atc260x->regmap = devm_regmap_init_i2c(client, atc260x->regmap_cfg);
+	if (IS_ERR(atc260x->regmap)) {
+		dev_err(&client->dev, "regmap initialization failed\n");
+		return PTR_ERR(atc260x->regmap);
+	}
+
+	i2c_set_clientdata(client, atc260x);
+	atc260x->type = atc260x_type;
+	atc260x->dev = &client->dev;
+	atc260x->irq = client->irq;
+
+	return atc260x_core_init(atc260x);
+}
+
+static int atc260x_i2c_remove(struct i2c_client *client)
+{
+	struct atc260x *atc260x = dev_get_drvdata(&client->dev);
+
+	atc260x_core_exit(atc260x);
+
+	return 0;
+}
+
+const struct of_device_id atc260x_of_match[] = {
+	{ .compatible = "actions,atc2609a", .data = (void *)ATC2609A },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(i2c, atc260x_of_match);
+
+static struct i2c_driver atc260x_i2c_driver = {
+	.driver = {
+		.name	= "atc260x",
+		.of_match_table	= of_match_ptr(atc260x_of_match),
+	},
+	.probe		= atc260x_i2c_probe,
+	.remove		= atc260x_i2c_remove,
+};
+
+module_i2c_driver(atc260x_i2c_driver);
+
+MODULE_DESCRIPTION("ATC260x PMICs I2C bus interface");
+MODULE_AUTHOR("Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/mfd/atc260x.h b/drivers/mfd/atc260x.h
new file mode 100644
index 000000000000..30fc66dfba04
--- /dev/null
+++ b/drivers/mfd/atc260x.h
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * MFD internals for ATC260x PMICs
+ *
+ * Copyright (C) 2019 Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
+ */
+
+#ifndef ATC260X_MFD_H
+#define ATC260X_MFD_H
+
+extern const struct of_device_id atc260x_of_match[];
+int atc260x_core_init(struct atc260x *atc260x);
+int atc260x_core_exit(struct atc260x *atc260x);
+void atc260x_cmu_reset(struct atc260x *atc260x, u32 reg, u8 mask, u32 bit);
+
+extern const struct regmap_config atc2609a_regmap_config;
+extern const struct mfd_cell atc2609a_mfd_cells[];
+extern const struct regmap_irq_chip atc2609a_regmap_irq_chip;
+extern const struct regmap_irq atc2609a_irqs[];
+int atc2609a_dev_init(struct atc260x *atc260x);
+
+#endif /* ATC260X_MFD_H */
diff --git a/include/linux/mfd/atc260x/atc2609a_regs.h b/include/linux/mfd/atc260x/atc2609a_regs.h
new file mode 100644
index 000000000000..851fb3dadd4f
--- /dev/null
+++ b/include/linux/mfd/atc260x/atc2609a_regs.h
@@ -0,0 +1,228 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * ATC2609A PMIC register definitions
+ *
+ * Copyright (C) 2019 Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
+ */
+
+#ifndef __ATC2609A_REGS_H__
+#define __ATC2609A_REGS_H__
+
+enum atc2609a_irq_def {
+	ATC2609A_IRQ_AUDIO = 0,
+	ATC2609A_IRQ_OV = 1,
+	ATC2609A_IRQ_OC = 2,
+	ATC2609A_IRQ_OT = 3,
+	ATC2609A_IRQ_UV = 4,
+	ATC2609A_IRQ_ALARM = 5,
+	ATC2609A_IRQ_ONOFF = 6,
+	ATC2609A_IRQ_WKUP = 7,
+	ATC2609A_IRQ_IR = 8,
+	ATC2609A_IRQ_REMCON = 9,
+	ATC2609A_IRQ_POWER_IN = 10,
+};
+
+/* PMU Register */
+#define ATC2609A_PMU_SYS_CTL0			0x00
+#define ATC2609A_PMU_SYS_CTL1			0x01
+#define ATC2609A_PMU_SYS_CTL2			0x02
+#define ATC2609A_PMU_SYS_CTL3			0x03
+#define ATC2609A_PMU_SYS_CTL4			0x04
+#define ATC2609A_PMU_SYS_CTL5			0x05
+#define ATC2609A_PMU_SYS_CTL6			0x06
+#define ATC2609A_PMU_SYS_CTL7			0x07
+#define ATC2609A_PMU_SYS_CTL8			0x08
+#define ATC2609A_PMU_SYS_CTL9			0x09
+#define ATC2609A_PMU_BAT_CTL0			0x0A
+#define ATC2609A_PMU_BAT_CTL1			0x0B
+#define ATC2609A_PMU_VBUS_CTL0			0x0C
+#define ATC2609A_PMU_VBUS_CTL1			0x0D
+#define ATC2609A_PMU_WALL_CTL0			0x0E
+#define ATC2609A_PMU_WALL_CTL1			0x0F
+#define ATC2609A_PMU_SYS_PENDING		0x10
+#define ATC2609A_PMU_APDS_CTL0			0x11
+#define ATC2609A_PMU_APDS_CTL1			0x12
+#define ATC2609A_PMU_APDS_CTL2			0x13
+#define ATC2609A_PMU_CHARGER_CTL		0x14
+#define ATC2609A_PMU_BAKCHARGER_CTL		0x15
+#define ATC2609A_PMU_SWCHG_CTL0			0x16
+#define ATC2609A_PMU_SWCHG_CTL1			0x17
+#define ATC2609A_PMU_SWCHG_CTL2			0x18
+#define ATC2609A_PMU_SWCHG_CTL3			0x19
+#define ATC2609A_PMU_SWCHG_CTL4			0x1A
+#define ATC2609A_PMU_DC_OSC			0x1B
+#define ATC2609A_PMU_DC0_CTL0			0x1C
+#define ATC2609A_PMU_DC0_CTL1			0x1D
+#define ATC2609A_PMU_DC0_CTL2			0x1E
+#define ATC2609A_PMU_DC0_CTL3			0x1F
+#define ATC2609A_PMU_DC0_CTL4			0x20
+#define ATC2609A_PMU_DC0_CTL5			0x21
+#define ATC2609A_PMU_DC0_CTL6			0x22
+#define ATC2609A_PMU_DC1_CTL0			0x23
+#define ATC2609A_PMU_DC1_CTL1			0x24
+#define ATC2609A_PMU_DC1_CTL2			0x25
+#define ATC2609A_PMU_DC1_CTL3			0x26
+#define ATC2609A_PMU_DC1_CTL4			0x27
+#define ATC2609A_PMU_DC1_CTL5			0x28
+#define ATC2609A_PMU_DC1_CTL6			0x29
+#define ATC2609A_PMU_DC2_CTL0			0x2A
+#define ATC2609A_PMU_DC2_CTL1			0x2B
+#define ATC2609A_PMU_DC2_CTL2			0x2C
+#define ATC2609A_PMU_DC2_CTL3			0x2D
+#define ATC2609A_PMU_DC2_CTL4			0x2E
+#define ATC2609A_PMU_DC2_CTL5			0x2F
+#define ATC2609A_PMU_DC2_CTL6			0x30
+#define ATC2609A_PMU_DC3_CTL0			0x31
+#define ATC2609A_PMU_DC3_CTL1			0x32
+#define ATC2609A_PMU_DC3_CTL2			0x33
+#define ATC2609A_PMU_DC3_CTL3			0x34
+#define ATC2609A_PMU_DC3_CTL4			0x35
+#define ATC2609A_PMU_DC3_CTL5			0x36
+#define ATC2609A_PMU_DC3_CTL6			0x37
+#define ATC2609A_PMU_DC_ZR			0x38
+#define ATC2609A_PMU_LDO0_CTL0			0x39
+#define ATC2609A_PMU_LDO0_CTL1			0x3A
+#define ATC2609A_PMU_LDO1_CTL0			0x3B
+#define ATC2609A_PMU_LDO1_CTL1			0x3C
+#define ATC2609A_PMU_LDO2_CTL0			0x3D
+#define ATC2609A_PMU_LDO2_CTL1			0x3E
+#define ATC2609A_PMU_LDO3_CTL0			0x3F
+#define ATC2609A_PMU_LDO3_CTL1			0x40
+#define ATC2609A_PMU_LDO4_CTL0			0x41
+#define ATC2609A_PMU_LDO4_CTL1			0x42
+#define ATC2609A_PMU_LDO5_CTL0			0x43
+#define ATC2609A_PMU_LDO5_CTL1			0x44
+#define ATC2609A_PMU_LDO6_CTL0			0x45
+#define ATC2609A_PMU_LDO6_CTL1			0x46
+#define ATC2609A_PMU_LDO7_CTL0			0x47
+#define ATC2609A_PMU_LDO7_CTL1			0x48
+#define ATC2609A_PMU_LDO8_CTL0			0x49
+#define ATC2609A_PMU_LDO8_CTL1			0x4A
+#define ATC2609A_PMU_LDO9_CTL			0x4B
+#define ATC2609A_PMU_OV_INT_EN			0x4C
+#define ATC2609A_PMU_OV_STATUS			0x4D
+#define ATC2609A_PMU_UV_INT_EN			0x4E
+#define ATC2609A_PMU_UV_STATUS			0x4F
+#define ATC2609A_PMU_OC_INT_EN			0x50
+#define ATC2609A_PMU_OC_STATUS			0x51
+#define ATC2609A_PMU_OT_CTL			0x52
+#define ATC2609A_PMU_CM_CTL0			0x53
+#define ATC2609A_PMU_FW_USE0			0x54
+#define ATC2609A_PMU_FW_USE1			0x55
+#define ATC2609A_PMU_ADC12B_I			0x56
+#define ATC2609A_PMU_ADC12B_V			0x57
+#define ATC2609A_PMU_ADC12B_DUMMY		0x58
+#define ATC2609A_PMU_AUXADC_CTL0		0x59
+#define ATC2609A_PMU_AUXADC_CTL1		0x5A
+#define ATC2609A_PMU_BATVADC			0x5B
+#define ATC2609A_PMU_BATIADC			0x5C
+#define ATC2609A_PMU_WALLVADC			0x5D
+#define ATC2609A_PMU_WALLIADC			0x5E
+#define ATC2609A_PMU_VBUSVADC			0x5F
+#define ATC2609A_PMU_VBUSIADC			0x60
+#define ATC2609A_PMU_SYSPWRADC			0x61
+#define ATC2609A_PMU_REMCONADC			0x62
+#define ATC2609A_PMU_SVCCADC			0x63
+#define ATC2609A_PMU_CHGIADC			0x64
+#define ATC2609A_PMU_IREFADC			0x65
+#define ATC2609A_PMU_BAKBATADC			0x66
+#define ATC2609A_PMU_ICTEMPADC			0x67
+#define ATC2609A_PMU_AUXADC0			0x68
+#define ATC2609A_PMU_AUXADC1			0x69
+#define ATC2609A_PMU_AUXADC2			0x6A
+#define ATC2609A_PMU_AUXADC3			0x6B
+#define ATC2609A_PMU_ICTEMPADC_ADJ		0x6C
+#define ATC2609A_PMU_BDG_CTL			0x6D
+#define ATC2609A_RTC_CTL			0x6E
+#define ATC2609A_RTC_MSALM			0x6F
+#define ATC2609A_RTC_HALM			0x70
+#define ATC2609A_RTC_YMDALM			0x71
+#define ATC2609A_RTC_MS				0x72
+#define ATC2609A_RTC_H				0x73
+#define ATC2609A_RTC_DC				0x74
+#define ATC2609A_RTC_YMD			0x75
+#define ATC2609A_EFUSE_DAT			0x76
+#define ATC2609A_EFUSECRTL1			0x77
+#define ATC2609A_EFUSECRTL2			0x78
+#define ATC2609A_PMU_DC4_CTL0			0x79
+#define ATC2609A_PMU_DC4_CTL1			0x7A
+#define ATC2609A_PMU_DC4_CTL2			0x7B
+#define ATC2609A_PMU_DC4_CTL3			0x7C
+#define ATC2609A_PMU_DC4_CTL4			0x7D
+#define ATC2609A_PMU_DC4_CTL5			0x7E
+#define ATC2609A_PMU_DC4_CTL6			0x7F
+#define ATC2609A_PMU_PWR_STATUS			0x80
+#define ATC2609A_PMU_S2_PWR			0x81
+#define ATC2609A_CLMT_CTL0			0x82
+#define ATC2609A_CLMT_DATA0			0x83
+#define ATC2609A_CLMT_DATA1			0x84
+#define ATC2609A_CLMT_DATA2			0x85
+#define ATC2609A_CLMT_DATA3			0x86
+#define ATC2609A_CLMT_ADD0			0x87
+#define ATC2609A_CLMT_ADD1			0x88
+#define ATC2609A_CLMT_OCV_TABLE			0x89
+#define ATC2609A_CLMT_R_TABLE			0x8A
+#define ATC2609A_PMU_PWRON_CTL0			0x8D
+#define ATC2609A_PMU_PWRON_CTL1			0x8E
+#define ATC2609A_PMU_PWRON_CTL2			0x8F
+#define ATC2609A_IRC_CTL			0x90
+#define ATC2609A_IRC_STAT			0x91
+#define ATC2609A_IRC_CC				0x92
+#define ATC2609A_IRC_KDC			0x93
+#define ATC2609A_IRC_WK				0x94
+#define ATC2609A_IRC_RCC			0x95
+
+/* AUDIO_OUT Register */
+#define ATC2609A_AUDIOINOUT_CTL			0xA0
+#define ATC2609A_AUDIO_DEBUGOUTCTL		0xA1
+#define ATC2609A_DAC_DIGITALCTL			0xA2
+#define ATC2609A_DAC_VOLUMECTL0			0xA3
+#define ATC2609A_DAC_ANALOG0			0xA4
+#define ATC2609A_DAC_ANALOG1			0xA5
+#define ATC2609A_DAC_ANALOG2			0xA6
+#define ATC2609A_DAC_ANALOG3			0xA7
+
+/* AUDIO_IN Register */
+#define ATC2609A_ADC_DIGITALCTL			0xA8
+#define ATC2609A_ADC_HPFCTL			0xA9
+#define ATC2609A_ADC_CTL			0xAA
+#define ATC2609A_AGC_CTL0			0xAB
+#define ATC2609A_AGC_CTL1			0xAC
+#define ATC2609A_AGC_CTL2			0xAD
+#define ATC2609A_ADC_ANALOG0			0xAE
+#define ATC2609A_ADC_ANALOG1			0xAF
+
+/* PCM_IF Register */
+#define ATC2609A_PCM0_CTL			0xB0
+#define ATC2609A_PCM1_CTL			0xB1
+#define ATC2609A_PCM2_CTL			0xB2
+#define ATC2609A_PCMIF_CTL			0xB3
+
+/* CMU_CONTROL Register */
+#define ATC2609A_CMU_DEVRST			0xC1
+
+/* INTS Register */
+#define ATC2609A_INTS_PD			0xC8
+#define ATC2609A_INTS_MSK			0xC9
+
+/* MFP Register */
+#define ATC2609A_MFP_CTL			0xD0
+#define ATC2609A_PAD_VSEL			0xD1
+#define ATC2609A_GPIO_OUTEN			0xD2
+#define ATC2609A_GPIO_INEN			0xD3
+#define ATC2609A_GPIO_DAT			0xD4
+#define ATC2609A_PAD_DRV			0xD5
+#define ATC2609A_PAD_EN				0xD6
+#define ATC2609A_DEBUG_SEL			0xD7
+#define ATC2609A_DEBUG_IE			0xD8
+#define ATC2609A_DEBUG_OE			0xD9
+#define ATC2609A_CHIP_VER			0xDC
+
+/* PWSI Register */
+#define ATC2609A_PWSI_CTL			0xF0
+#define ATC2609A_PWSI_STATUS			0xF1
+
+/* TWSI Register */
+#define ATC2609A_SADDR				0xFF
+
+#endif /* __ATC2609A_REGS_H__ */
diff --git a/include/linux/mfd/atc260x/core.h b/include/linux/mfd/atc260x/core.h
new file mode 100644
index 000000000000..9d75eca731d4
--- /dev/null
+++ b/include/linux/mfd/atc260x/core.h
@@ -0,0 +1,64 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Core MFD defines for ATC260x PMICs
+ *
+ * Copyright (C) 2019 Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
+ */
+
+#ifndef __ATC260X_CORE_H__
+#define __ATC260X_CORE_H__
+
+#include <linux/mfd/atc260x/atc2609a_regs.h>
+
+enum atc260x_type {
+	ATC2603A = 0,
+	ATC2603C = 1,
+	ATC2609A = 2,
+};
+
+enum atc260x_reg {
+	ATC2609A_ID_DCDC0,
+	ATC2609A_ID_DCDC1,
+	ATC2609A_ID_DCDC2,
+	ATC2609A_ID_DCDC3,
+	ATC2609A_ID_DCDC4,
+	ATC2609A_ID_LDO0,
+	ATC2609A_ID_LDO1,
+	ATC2609A_ID_LDO2,
+	ATC2609A_ID_LDO3,
+	ATC2609A_ID_LDO4,
+	ATC2609A_ID_LDO5,
+	ATC2609A_ID_LDO6,
+	ATC2609A_ID_LDO7,
+	ATC2609A_ID_LDO8,
+	ATC2609A_ID_LDO9,
+	ATC2609A_ID_MAX,
+};
+
+enum atc260x_cmu_bits {
+	ATC260X_CMU_TP = 0,
+	ATC260X_CMU_MFP = 1,
+	ATC260X_CMU_INTS = 2,
+	ATC260X_CMU_ETHPHY = 3,
+	ATC260X_CMU_AUDIO = 4,
+	ATC260X_CMU_PWSI = 5,
+};
+
+struct atc260x {
+	struct device *dev;
+	struct regmap_irq_chip_data *irq_data;
+	struct regmap *regmap;
+	const struct regmap_config *regmap_cfg;
+	const struct regmap_irq_chip *regmap_irq_chip;
+	const struct mfd_cell *cells;
+	int nr_cells;
+	int irq;
+
+	enum atc260x_type type;
+	const char *type_name;
+	unsigned int rev_reg;
+
+	int (*dev_init)(struct atc260x *atc260x);
+};
+
+#endif /* __ATC260X_CORE_H__ */
-- 
2.17.1




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