mfd: tps65218: Add driver for the TPS65218 PMIC

The TPS65218 chip is a power management IC for Portable Navigation Systems
and Tablet Computing devices. It contains the following components:

 - Regulators.
 - Over Temperature warning and Shut down.

This patch adds support for tps65218 mfd device. At this time only
the regulator functionality is made available.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

4 files changed, 582 insertions, 0 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 30fbacfe8b3b..3e2d698ac432 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -853,6 +853,21 @@ config MFD_TPS65217
 	  This driver can also be built as a module.  If so, the module
 	  will be called tps65217.
 
+config MFD_TPS65218
+	tristate "TI TPS65218 Power Management chips"
+	depends on I2C
+	select MFD_CORE
+	select REGMAP_I2C
+	help
+	  If you say yes here you get support for the TPS65218 series of
+	  Power Management chips.
+	  These include voltage regulators, gpio and other features
+	  that are often used in portable devices. Only regulator
+	  component is currently supported.
+
+	  This driver can also be built as a module.  If so, the module
+	  will be called tps65218.
+
 config MFD_TPS6586X
 	bool "TI TPS6586x Power Management chips"
 	depends on I2C=y
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index c8eb0bcf4da0..5e5cfbd1b8da 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -62,6 +62,7 @@ obj-$(CONFIG_TPS6105X)		+= tps6105x.o
 obj-$(CONFIG_TPS65010)		+= tps65010.o
 obj-$(CONFIG_TPS6507X)		+= tps6507x.o
 obj-$(CONFIG_MFD_TPS65217)	+= tps65217.o
+obj-$(CONFIG_MFD_TPS65218)	+= tps65218.o
 obj-$(CONFIG_MFD_TPS65910)	+= tps65910.o
 tps65912-objs                   := tps65912-core.o tps65912-irq.o
 obj-$(CONFIG_MFD_TPS65912)	+= tps65912.o
diff --git a/drivers/mfd/tps65218.c b/drivers/mfd/tps65218.c
new file mode 100644
index 000000000000..a74bfb59f18f
--- /dev/null
+++ b/drivers/mfd/tps65218.c
@@ -0,0 +1,282 @@
+/*
+ * Driver for TPS65218 Integrated power management chipsets
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * 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.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether expressed or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License version 2 for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/mutex.h>
+
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps65218.h>
+
+#define TPS65218_PASSWORD_REGS_UNLOCK   0x7D
+
+/**
+ * tps65218_reg_read: Read a single tps65218 register.
+ *
+ * @tps: Device to read from.
+ * @reg: Register to read.
+ * @val: Contians the value
+ */
+int tps65218_reg_read(struct tps65218 *tps, unsigned int reg,
+			unsigned int *val)
+{
+	return regmap_read(tps->regmap, reg, val);
+}
+EXPORT_SYMBOL_GPL(tps65218_reg_read);
+
+/**
+ * tps65218_reg_write: Write a single tps65218 register.
+ *
+ * @tps65218: Device to write to.
+ * @reg: Register to write to.
+ * @val: Value to write.
+ * @level: Password protected level
+ */
+int tps65218_reg_write(struct tps65218 *tps, unsigned int reg,
+			unsigned int val, unsigned int level)
+{
+	int ret;
+	unsigned int xor_reg_val;
+
+	switch (level) {
+	case TPS65218_PROTECT_NONE:
+		return regmap_write(tps->regmap, reg, val);
+	case TPS65218_PROTECT_L1:
+		xor_reg_val = reg ^ TPS65218_PASSWORD_REGS_UNLOCK;
+		ret = regmap_write(tps->regmap, TPS65218_REG_PASSWORD,
+							xor_reg_val);
+		if (ret < 0)
+			return ret;
+
+		return regmap_write(tps->regmap, reg, val);
+	default:
+		return -EINVAL;
+	}
+}
+EXPORT_SYMBOL_GPL(tps65218_reg_write);
+
+/**
+ * tps65218_update_bits: Modify bits w.r.t mask, val and level.
+ *
+ * @tps65218: Device to write to.
+ * @reg: Register to read-write to.
+ * @mask: Mask.
+ * @val: Value to write.
+ * @level: Password protected level
+ */
+static int tps65218_update_bits(struct tps65218 *tps, unsigned int reg,
+		unsigned int mask, unsigned int val, unsigned int level)
+{
+	int ret;
+	unsigned int data;
+
+	ret = tps65218_reg_read(tps, reg, &data);
+	if (ret) {
+		dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
+		return ret;
+	}
+
+	data &= ~mask;
+	data |= val & mask;
+
+	mutex_lock(&tps->tps_lock);
+	ret = tps65218_reg_write(tps, reg, data, level);
+	if (ret)
+		dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
+	mutex_unlock(&tps->tps_lock);
+
+	return ret;
+}
+
+int tps65218_set_bits(struct tps65218 *tps, unsigned int reg,
+		unsigned int mask, unsigned int val, unsigned int level)
+{
+	return tps65218_update_bits(tps, reg, mask, val, level);
+}
+EXPORT_SYMBOL_GPL(tps65218_set_bits);
+
+int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg,
+		unsigned int mask, unsigned int level)
+{
+	return tps65218_update_bits(tps, reg, mask, 0, level);
+}
+EXPORT_SYMBOL_GPL(tps65218_clear_bits);
+
+static struct regmap_config tps65218_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.cache_type = REGCACHE_RBTREE,
+};
+
+static const struct regmap_irq tps65218_irqs[] = {
+	/* INT1 IRQs */
+	[TPS65218_PRGC_IRQ] = {
+		.mask = TPS65218_INT1_PRGC,
+	},
+	[TPS65218_CC_AQC_IRQ] = {
+		.mask = TPS65218_INT1_CC_AQC,
+	},
+	[TPS65218_HOT_IRQ] = {
+		.mask = TPS65218_INT1_HOT,
+	},
+	[TPS65218_PB_IRQ] = {
+		.mask = TPS65218_INT1_PB,
+	},
+	[TPS65218_AC_IRQ] = {
+		.mask = TPS65218_INT1_AC,
+	},
+	[TPS65218_VPRG_IRQ] = {
+		.mask = TPS65218_INT1_VPRG,
+	},
+	[TPS65218_INVALID1_IRQ] = {
+	},
+	[TPS65218_INVALID2_IRQ] = {
+	},
+	/* INT2 IRQs*/
+	[TPS65218_LS1_I_IRQ] = {
+		.mask = TPS65218_INT2_LS1_I,
+		.reg_offset = 1,
+	},
+	[TPS65218_LS2_I_IRQ] = {
+		.mask = TPS65218_INT2_LS2_I,
+		.reg_offset = 1,
+	},
+	[TPS65218_LS3_I_IRQ] = {
+		.mask = TPS65218_INT2_LS3_I,
+		.reg_offset = 1,
+	},
+	[TPS65218_LS1_F_IRQ] = {
+		.mask = TPS65218_INT2_LS1_F,
+		.reg_offset = 1,
+	},
+	[TPS65218_LS2_F_IRQ] = {
+		.mask = TPS65218_INT2_LS2_F,
+		.reg_offset = 1,
+	},
+	[TPS65218_LS3_F_IRQ] = {
+		.mask = TPS65218_INT2_LS3_F,
+		.reg_offset = 1,
+	},
+	[TPS65218_INVALID3_IRQ] = {
+	},
+	[TPS65218_INVALID4_IRQ] = {
+	},
+};
+
+static struct regmap_irq_chip tps65218_irq_chip = {
+	.name = "tps65218",
+	.irqs = tps65218_irqs,
+	.num_irqs = ARRAY_SIZE(tps65218_irqs),
+
+	.num_regs = 2,
+	.mask_base = TPS65218_REG_INT_MASK1,
+};
+
+static const struct of_device_id of_tps65218_match_table[] = {
+	{ .compatible = "ti,tps65218", },
+};
+
+static int tps65218_probe(struct i2c_client *client,
+				const struct i2c_device_id *ids)
+{
+	struct tps65218 *tps;
+	const struct of_device_id *match;
+	int ret;
+
+	match = of_match_device(of_tps65218_match_table, &client->dev);
+	if (!match) {
+		dev_err(&client->dev,
+			"Failed to find matching dt id\n");
+		return -EINVAL;
+	}
+
+	tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
+	if (!tps)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, tps);
+	tps->dev = &client->dev;
+	tps->irq = client->irq;
+	tps->regmap = devm_regmap_init_i2c(client, &tps65218_regmap_config);
+	if (IS_ERR(tps->regmap)) {
+		ret = PTR_ERR(tps->regmap);
+		dev_err(tps->dev, "Failed to allocate register map: %d\n",
+			ret);
+		return ret;
+	}
+
+	mutex_init(&tps->tps_lock);
+
+	ret = regmap_add_irq_chip(tps->regmap, tps->irq,
+			IRQF_ONESHOT, 0, &tps65218_irq_chip,
+			&tps->irq_data);
+	if (ret < 0)
+		return ret;
+
+	ret = of_platform_populate(client->dev.of_node, NULL, NULL,
+				   &client->dev);
+	if (ret < 0)
+		goto err_irq;
+
+	return 0;
+
+err_irq:
+	regmap_del_irq_chip(tps->irq, tps->irq_data);
+
+	return ret;
+}
+
+static int tps65218_remove(struct i2c_client *client)
+{
+	struct tps65218 *tps = i2c_get_clientdata(client);
+
+	regmap_del_irq_chip(tps->irq, tps->irq_data);
+
+	return 0;
+}
+
+static const struct i2c_device_id tps65218_id_table[] = {
+	{ "tps65218", TPS65218 },
+	{ },
+};
+MODULE_DEVICE_TABLE(i2c, tps65218_id_table);
+
+static struct i2c_driver tps65218_driver = {
+	.driver		= {
+		.name	= "tps65218",
+		.owner	= THIS_MODULE,
+		.of_match_table = of_tps65218_match_table,
+	},
+	.probe		= tps65218_probe,
+	.remove		= tps65218_remove,
+	.id_table       = tps65218_id_table,
+};
+
+module_i2c_driver(tps65218_driver);
+
+MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
+MODULE_DESCRIPTION("TPS65218 chip family multi-function driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/tps65218.h b/include/linux/mfd/tps65218.h
new file mode 100644
index 000000000000..d2e357df5a0e
--- /dev/null
+++ b/include/linux/mfd/tps65218.h
@@ -0,0 +1,284 @@
+/*
+ * linux/mfd/tps65218.h
+ *
+ * Functions to access TPS65219 power management chip.
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * 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.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether expressed or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License version 2 for more details.
+ */
+
+#ifndef __LINUX_MFD_TPS65218_H
+#define __LINUX_MFD_TPS65218_H
+
+#include <linux/i2c.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/bitops.h>
+
+/* TPS chip id list */
+#define TPS65218			0xF0
+
+/* I2C ID for TPS65218 part */
+#define TPS65218_I2C_ID			0x24
+
+/* All register addresses */
+#define TPS65218_REG_CHIPID		0x00
+#define TPS65218_REG_INT1		0x01
+#define TPS65218_REG_INT2		0x02
+#define TPS65218_REG_INT_MASK1		0x03
+#define TPS65218_REG_INT_MASK2		0x04
+#define TPS65218_REG_STATUS		0x05
+#define TPS65218_REG_CONTROL		0x06
+#define TPS65218_REG_FLAG		0x07
+
+#define TPS65218_REG_PASSWORD		0x10
+#define TPS65218_REG_ENABLE1		0x11
+#define TPS65218_REG_ENABLE2		0x12
+#define TPS65218_REG_CONFIG1		0x13
+#define TPS65218_REG_CONFIG2		0x14
+#define TPS65218_REG_CONFIG3		0x15
+#define TPS65218_REG_CONTROL_DCDC1	0x16
+#define TPS65218_REG_CONTROL_DCDC2	0x17
+#define TPS65218_REG_CONTROL_DCDC3	0x18
+#define TPS65218_REG_CONTROL_DCDC4	0x19
+#define TPS65218_REG_CONTRL_SLEW_RATE	0x1A
+#define TPS65218_REG_CONTROL_LDO1	0x1B
+#define TPS65218_REG_SEQ1		0x20
+#define TPS65218_REG_SEQ2		0x21
+#define TPS65218_REG_SEQ3		0x22
+#define TPS65218_REG_SEQ4		0x23
+#define TPS65218_REG_SEQ5		0x24
+#define TPS65218_REG_SEQ6		0x25
+#define TPS65218_REG_SEQ7		0x26
+
+/* Register field definitions */
+#define TPS65218_CHIPID_CHIP_MASK	0xF8
+#define TPS65218_CHIPID_REV_MASK	0x07
+
+#define TPS65218_INT1_VPRG		BIT(5)
+#define TPS65218_INT1_AC		BIT(4)
+#define TPS65218_INT1_PB		BIT(3)
+#define TPS65218_INT1_HOT		BIT(2)
+#define TPS65218_INT1_CC_AQC		BIT(1)
+#define TPS65218_INT1_PRGC		BIT(0)
+
+#define TPS65218_INT2_LS3_F		BIT(5)
+#define TPS65218_INT2_LS2_F		BIT(4)
+#define TPS65218_INT2_LS1_F		BIT(3)
+#define TPS65218_INT2_LS3_I		BIT(2)
+#define TPS65218_INT2_LS2_I		BIT(1)
+#define TPS65218_INT2_LS1_I		BIT(0)
+
+#define TPS65218_INT_MASK1_VPRG		BIT(5)
+#define TPS65218_INT_MASK1_AC		BIT(4)
+#define TPS65218_INT_MASK1_PB		BIT(3)
+#define TPS65218_INT_MASK1_HOT		BIT(2)
+#define TPS65218_INT_MASK1_CC_AQC	BIT(1)
+#define TPS65218_INT_MASK1_PRGC		BIT(0)
+
+#define TPS65218_INT_MASK2_LS3_F	BIT(5)
+#define TPS65218_INT_MASK2_LS2_F	BIT(4)
+#define TPS65218_INT_MASK2_LS1_F	BIT(3)
+#define TPS65218_INT_MASK2_LS3_I	BIT(2)
+#define TPS65218_INT_MASK2_LS2_I	BIT(1)
+#define TPS65218_INT_MASK2_LS1_I	BIT(0)
+
+#define TPS65218_STATUS_FSEAL		BIT(7)
+#define TPS65218_STATUS_EE		BIT(6)
+#define TPS65218_STATUS_AC_STATE	BIT(5)
+#define TPS65218_STATUS_PB_STATE	BIT(4)
+#define TPS65218_STATUS_STATE_MASK	0xC
+#define TPS65218_STATUS_CC_STAT		0x3
+
+#define TPS65218_CONTROL_OFFNPFO	BIT(1)
+#define TPS65218_CONTROL_CC_AQ	BIT(0)
+
+#define TPS65218_FLAG_GPO3_FLG		BIT(7)
+#define TPS65218_FLAG_GPO2_FLG		BIT(6)
+#define TPS65218_FLAG_GPO1_FLG		BIT(5)
+#define TPS65218_FLAG_LDO1_FLG		BIT(4)
+#define TPS65218_FLAG_DC4_FLG		BIT(3)
+#define TPS65218_FLAG_DC3_FLG		BIT(2)
+#define TPS65218_FLAG_DC2_FLG		BIT(1)
+#define TPS65218_FLAG_DC1_FLG		BIT(0)
+
+#define TPS65218_ENABLE1_DC6_EN		BIT(5)
+#define TPS65218_ENABLE1_DC5_EN		BIT(4)
+#define TPS65218_ENABLE1_DC4_EN		BIT(3)
+#define TPS65218_ENABLE1_DC3_EN		BIT(2)
+#define TPS65218_ENABLE1_DC2_EN		BIT(1)
+#define TPS65218_ENABLE1_DC1_EN		BIT(0)
+
+#define TPS65218_ENABLE2_GPIO3		BIT(6)
+#define TPS65218_ENABLE2_GPIO2		BIT(5)
+#define TPS65218_ENABLE2_GPIO1		BIT(4)
+#define TPS65218_ENABLE2_LS3_EN		BIT(3)
+#define TPS65218_ENABLE2_LS2_EN		BIT(2)
+#define TPS65218_ENABLE2_LS1_EN		BIT(1)
+#define TPS65218_ENABLE2_LDO1_EN	BIT(0)
+
+
+#define TPS65218_CONFIG1_TRST		BIT(7)
+#define TPS65218_CONFIG1_GPO2_BUF	BIT(6)
+#define TPS65218_CONFIG1_IO1_SEL	BIT(5)
+#define TPS65218_CONFIG1_PGDLY_MASK	0x18
+#define TPS65218_CONFIG1_STRICT		BIT(2)
+#define TPS65218_CONFIG1_UVLO_MASK	0x3
+
+#define TPS65218_CONFIG2_DC12_RST	BIT(7)
+#define TPS65218_CONFIG2_UVLOHYS	BIT(6)
+#define TPS65218_CONFIG2_LS3ILIM_MASK	0xC
+#define TPS65218_CONFIG2_LS2ILIM_MASK	0x3
+
+#define TPS65218_CONFIG3_LS3NPFO	BIT(5)
+#define TPS65218_CONFIG3_LS2NPFO	BIT(4)
+#define TPS65218_CONFIG3_LS1NPFO	BIT(3)
+#define TPS65218_CONFIG3_LS3DCHRG	BIT(2)
+#define TPS65218_CONFIG3_LS2DCHRG	BIT(1)
+#define TPS65218_CONFIG3_LS1DCHRG	BIT(0)
+
+#define TPS65218_CONTROL_DCDC1_PFM	BIT(7)
+#define TPS65218_CONTROL_DCDC1_MASK	0x7F
+
+#define TPS65218_CONTROL_DCDC2_PFM	BIT(7)
+#define TPS65218_CONTROL_DCDC2_MASK	0x3F
+
+#define TPS65218_CONTROL_DCDC3_PFM	BIT(7)
+#define TPS65218_CONTROL_DCDC3_MASK	0x3F
+
+#define TPS65218_CONTROL_DCDC4_PFM	BIT(7)
+#define TPS65218_CONTROL_DCDC4_MASK	0x3F
+
+#define TPS65218_SLEW_RATE_GO		BIT(7)
+#define TPS65218_SLEW_RATE_GODSBL	BIT(6)
+#define TPS65218_SLEW_RATE_SLEW_MASK	0x7
+
+#define TPS65218_CONTROL_LDO1_MASK	0x3F
+
+#define TPS65218_SEQ1_DLY8		BIT(7)
+#define TPS65218_SEQ1_DLY7		BIT(6)
+#define TPS65218_SEQ1_DLY6		BIT(5)
+#define TPS65218_SEQ1_DLY5		BIT(4)
+#define TPS65218_SEQ1_DLY4		BIT(3)
+#define TPS65218_SEQ1_DLY3		BIT(2)
+#define TPS65218_SEQ1_DLY2		BIT(1)
+#define TPS65218_SEQ1_DLY1		BIT(0)
+
+#define TPS65218_SEQ2_DLYFCTR		BIT(7)
+#define TPS65218_SEQ2_DLY9		BIT(0)
+
+#define TPS65218_SEQ3_DC2_SEQ_MASK	0xF0
+#define TPS65218_SEQ3_DC1_SEQ_MASK	0xF
+
+#define TPS65218_SEQ4_DC4_SEQ_MASK	0xF0
+#define TPS65218_SEQ4_DC3_SEQ_MASK	0xF
+
+#define TPS65218_SEQ5_DC6_SEQ_MASK	0xF0
+#define TPS65218_SEQ5_DC5_SEQ_MASK	0xF
+
+#define TPS65218_SEQ6_LS1_SEQ_MASK	0xF0
+#define TPS65218_SEQ6_LDO1_SEQ_MASK	0xF
+
+#define TPS65218_SEQ7_GPO3_SEQ_MASK	0xF0
+#define TPS65218_SEQ7_GPO1_SEQ_MASK	0xF
+#define TPS65218_PROTECT_NONE		0
+#define TPS65218_PROTECT_L1		1
+
+enum tps65218_regulator_id {
+	/* DCDC's */
+	TPS65218_DCDC_1,
+	TPS65218_DCDC_2,
+	TPS65218_DCDC_3,
+	TPS65218_DCDC_4,
+	TPS65218_DCDC_5,
+	TPS65218_DCDC_6,
+	/* LDOs */
+	TPS65218_LDO_1,
+};
+
+#define TPS65218_MAX_REG_ID		TPS65218_LDO_1
+
+/* Number of step-down converters available */
+#define TPS65218_NUM_DCDC		6
+/* Number of LDO voltage regulators available */
+#define TPS65218_NUM_LDO		1
+/* Number of total regulators available */
+#define TPS65218_NUM_REGULATOR		(TPS65218_NUM_DCDC + TPS65218_NUM_LDO)
+
+/* Define the TPS65218 IRQ numbers */
+enum tps65218_irqs {
+	/* INT1 registers */
+	TPS65218_PRGC_IRQ,
+	TPS65218_CC_AQC_IRQ,
+	TPS65218_HOT_IRQ,
+	TPS65218_PB_IRQ,
+	TPS65218_AC_IRQ,
+	TPS65218_VPRG_IRQ,
+	TPS65218_INVALID1_IRQ,
+	TPS65218_INVALID2_IRQ,
+	/* INT2 registers */
+	TPS65218_LS1_I_IRQ,
+	TPS65218_LS2_I_IRQ,
+	TPS65218_LS3_I_IRQ,
+	TPS65218_LS1_F_IRQ,
+	TPS65218_LS2_F_IRQ,
+	TPS65218_LS3_F_IRQ,
+	TPS65218_INVALID3_IRQ,
+	TPS65218_INVALID4_IRQ,
+};
+
+/**
+ * struct tps_info - packages regulator constraints
+ * @id:			Id of the regulator
+ * @name:		Voltage regulator name
+ * @min_uV:		minimum micro volts
+ * @max_uV:		minimum micro volts
+ *
+ * This data is used to check the regualtor voltage limits while setting.
+ */
+struct tps_info {
+	int id;
+	const char *name;
+	int min_uV;
+	int max_uV;
+};
+
+/**
+ * struct tps65218 - tps65218 sub-driver chip access routines
+ *
+ * Device data may be used to access the TPS65218 chip
+ */
+
+struct tps65218 {
+	struct device *dev;
+	unsigned int id;
+
+	struct mutex tps_lock;		/* lock guarding the data structure */
+	/* IRQ Data */
+	int irq;
+	u32 irq_mask;
+	struct regmap_irq_chip_data *irq_data;
+	struct regulator_desc desc[TPS65218_NUM_REGULATOR];
+	struct regulator_dev *rdev[TPS65218_NUM_REGULATOR];
+	struct tps_info *info[TPS65218_NUM_REGULATOR];
+	struct regmap *regmap;
+};
+
+int tps65218_reg_read(struct tps65218 *tps, unsigned int reg,
+					unsigned int *val);
+int tps65218_reg_write(struct tps65218 *tps, unsigned int reg,
+			unsigned int val, unsigned int level);
+int tps65218_set_bits(struct tps65218 *tps, unsigned int reg,
+		unsigned int mask, unsigned int val, unsigned int level);
+int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg,
+		unsigned int mask, unsigned int level);
+
+#endif /*  __LINUX_MFD_TPS65218_H */