mfd: Add MAX8907 core driver

The MAX8907 is an I2C-based power-management IC containing voltage
regulators, a reset controller, a real-time clock, and a touch-screen
controller.

The original driver was written by:
* Gyungoh Yoo <jack.yoo@maxim-ic.com>

Various fixes and enhancements by:
* Jin Park <jinyoungp@nvidia.com>
* Tom Cherry <tcherry@nvidia.com>
* Prashant Gaikwad <pgaikwad@nvidia.com>
* Dan Willemsen <dwillemsen@nvidia.com>
* Laxman Dewangan <ldewangan@nvidia.com>

During upstreaming, I (swarren):
* Converted to regmap.
* Converted to regmap-irq.
* Allowed probing from device tree.
* Renamed from max8907c->max8907, since the driver covers at least the
  C and B revisions.
* General cleanup.

Signed-off-by: Gyungoh Yoo <jack.yoo@maxim-ic.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com> #v3
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

5 files changed, 665 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/regulator/max8907.txt b/Documentation/devicetree/bindings/regulator/max8907.txt
new file mode 100644
index 000000000000..4fd847f0afc0
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/max8907.txt
@@ -0,0 +1,71 @@
+MAX8907 regulator
+
+Required properties:
+- compatible: "maxim,max8907"
+- reg: I2C slave address
+- interrupts: The interrupt output of the controller
+- mbatt-supply: The input supply for MBATT, BBAT, SDBY, VRTC.
+- in-v1-supply: The input supply for SD1.
+- in-v2-supply: The input supply for SD2.
+- in-v3-supply: The input supply for SD3.
+- in1-supply: The input supply for LDO1.
+...
+- in20-supply: The input supply for LDO20.
+- regulators: A node that houses a sub-node for each regulator within the
+  device. Each sub-node is identified using the regulator-compatible
+  property, with valid values listed below. The content of each sub-node
+  is defined by the standard binding for regulators; see regulator.txt.
+
+Valid regulator-compatible values are:
+
+  sd1, sd2, sd3, ldo1, ldo2, ldo3, ldo4, ldo5, ldo6, ldo7, ldo8, ldo9, ldo10,
+  ldo11, ldo12, ldo13, ldo14, ldo15, ldo16, ldo17, ldo18, ldo19, ldo20, out5v,
+  out33v, bbat, sdby, vrtc.
+
+Example:
+
+                max8907@3c {
+                        compatible = "maxim,max8907";
+                        reg = <0x3c>;
+                        interrupts = <0 86 0x4>;
+
+                        mbatt-supply = <&some_reg>;
+                        in-v1-supply = <&mbatt_reg>;
+                        ...
+                        in1-supply = <&mbatt_reg>;
+                        ...
+
+                        regulators {
+                                #address-cells = <1>;
+                                #size-cells = <0>;
+
+                                mbatt_reg: regulator@0 {
+                                        reg = <0>;
+                                        regulator-compatible = "mbatt";
+                                        regulator-name = "vbat_pmu";
+                                        regulator-min-microvolt = <5000000>;
+                                        regulator-max-microvolt = <5000000>;
+                                        regulator-always-on;
+                                };
+
+                                regulator@1 {
+                                        reg = <1>;
+                                        regulator-compatible = "sd1";
+                                        regulator-name = "nvvdd_sv1,vdd_cpu_pmu";
+                                        regulator-min-microvolt = <1000000>;
+                                        regulator-max-microvolt = <1000000>;
+                                        regulator-always-on;
+                                };
+
+                                regulator@2 {
+                                        reg = <2>;
+                                        regulator-compatible = "sd2";
+                                        regulator-name = "nvvdd_sv2,vdd_core";
+                                        regulator-min-microvolt = <1200000>;
+                                        regulator-max-microvolt = <1200000>;
+                                        regulator-always-on;
+                                };
+...
+                        };
+                };
+        };
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index d1facef28a60..856ec00ab787 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -476,6 +476,18 @@ config MFD_MAX77693
           additional drivers must be enabled in order to use the functionality
           of the device.
 
+config MFD_MAX8907
+        tristate "Maxim Semiconductor MAX8907 PMIC Support"
+        select MFD_CORE
+        depends on I2C=y && GENERIC_HARDIRQS
+        select REGMAP_I2C
+        select REGMAP_IRQ
+        help
+          Say yes here to support for Maxim Semiconductor MAX8907. This is
+          a Power Management IC. 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_MAX8925
         bool "Maxim Semiconductor MAX8925 PMIC Support"
         depends on I2C=y && GENERIC_HARDIRQS
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 79dd22d1dc3d..2a4108d98442 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -92,6 +92,7 @@ obj-$(CONFIG_MFD_DA9052_I2C)	+= da9052-i2c.o
 
 obj-$(CONFIG_MFD_MAX77686)      += max77686.o max77686-irq.o
 obj-$(CONFIG_MFD_MAX77693)      += max77693.o max77693-irq.o
+obj-$(CONFIG_MFD_MAX8907)       += max8907.o
 max8925-objs                    := max8925-core.o max8925-i2c.o
 obj-$(CONFIG_MFD_MAX8925)       += max8925.o
 obj-$(CONFIG_MFD_MAX8997)       += max8997.o max8997-irq.o
diff --git a/drivers/mfd/max8907.c b/drivers/mfd/max8907.c
new file mode 100644
index 000000000000..6497c98e030d
--- /dev/null
+++ b/drivers/mfd/max8907.c
@@ -0,0 +1,331 @@
+/*
+ * max8907.c - mfd driver for MAX8907
+ *
+ * Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com>
+ * Copyright (C) 2010-2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * 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.
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max8907.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+static struct mfd_cell max8907_cells[] = {
+        { .name = "max8907-regulator", },
+        { .name = "max8907-rtc", },
+};
+
+static bool max8907_gen_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+        switch (reg) {
+        case MAX8907_REG_ON_OFF_IRQ1:
+        case MAX8907_REG_ON_OFF_STAT:
+        case MAX8907_REG_ON_OFF_IRQ2:
+        case MAX8907_REG_CHG_IRQ1:
+        case MAX8907_REG_CHG_IRQ2:
+        case MAX8907_REG_CHG_STAT:
+                return true;
+        default:
+                return false;
+        }
+}
+
+static bool max8907_gen_is_precious_reg(struct device *dev, unsigned int reg)
+{
+        switch (reg) {
+        case MAX8907_REG_ON_OFF_IRQ1:
+        case MAX8907_REG_ON_OFF_IRQ2:
+        case MAX8907_REG_CHG_IRQ1:
+        case MAX8907_REG_CHG_IRQ2:
+                return true;
+        default:
+                return false;
+        }
+}
+
+static bool max8907_gen_is_writeable_reg(struct device *dev, unsigned int reg)
+{
+        return !max8907_gen_is_volatile_reg(dev, reg);
+}
+
+static const struct regmap_config max8907_regmap_gen_config = {
+        .reg_bits = 8,
+        .val_bits = 8,
+        .volatile_reg = max8907_gen_is_volatile_reg,
+        .precious_reg = max8907_gen_is_precious_reg,
+        .writeable_reg = max8907_gen_is_writeable_reg,
+        .max_register = MAX8907_REG_LDO20VOUT,
+        .cache_type = REGCACHE_RBTREE,
+};
+
+static bool max8907_rtc_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+        if (reg <= MAX8907_REG_RTC_YEAR2)
+                return true;
+
+        switch (reg) {
+        case MAX8907_REG_RTC_STATUS:
+        case MAX8907_REG_RTC_IRQ:
+                return true;
+        default:
+                return false;
+        }
+}
+
+static bool max8907_rtc_is_precious_reg(struct device *dev, unsigned int reg)
+{
+        switch (reg) {
+        case MAX8907_REG_RTC_IRQ:
+                return true;
+        default:
+                return false;
+        }
+}
+
+static bool max8907_rtc_is_writeable_reg(struct device *dev, unsigned int reg)
+{
+        switch (reg) {
+        case MAX8907_REG_RTC_STATUS:
+        case MAX8907_REG_RTC_IRQ:
+                return false;
+        default:
+                return true;
+        }
+}
+
+static const struct regmap_config max8907_regmap_rtc_config = {
+        .reg_bits = 8,
+        .val_bits = 8,
+        .volatile_reg = max8907_rtc_is_volatile_reg,
+        .precious_reg = max8907_rtc_is_precious_reg,
+        .writeable_reg = max8907_rtc_is_writeable_reg,
+        .max_register = MAX8907_REG_MPL_CNTL,
+        .cache_type = REGCACHE_RBTREE,
+};
+
+static const struct regmap_irq max8907_chg_irqs[] = {
+        { .reg_offset = 0, .mask = 1 << 0, },
+        { .reg_offset = 0, .mask = 1 << 1, },
+        { .reg_offset = 0, .mask = 1 << 2, },
+        { .reg_offset = 1, .mask = 1 << 0, },
+        { .reg_offset = 1, .mask = 1 << 1, },
+        { .reg_offset = 1, .mask = 1 << 2, },
+        { .reg_offset = 1, .mask = 1 << 3, },
+        { .reg_offset = 1, .mask = 1 << 4, },
+        { .reg_offset = 1, .mask = 1 << 5, },
+        { .reg_offset = 1, .mask = 1 << 6, },
+        { .reg_offset = 1, .mask = 1 << 7, },
+};
+
+static const struct regmap_irq_chip max8907_chg_irq_chip = {
+        .name = "max8907 chg",
+        .status_base = MAX8907_REG_CHG_IRQ1,
+        .mask_base = MAX8907_REG_CHG_IRQ1_MASK,
+        .wake_base = MAX8907_REG_CHG_IRQ1_MASK,
+        .irq_reg_stride = MAX8907_REG_CHG_IRQ2 - MAX8907_REG_CHG_IRQ1,
+        .num_regs = 2,
+        .irqs = max8907_chg_irqs,
+        .num_irqs = ARRAY_SIZE(max8907_chg_irqs),
+};
+
+static const struct regmap_irq max8907_on_off_irqs[] = {
+        { .reg_offset = 0, .mask = 1 << 0, },
+        { .reg_offset = 0, .mask = 1 << 1, },
+        { .reg_offset = 0, .mask = 1 << 2, },
+        { .reg_offset = 0, .mask = 1 << 3, },
+        { .reg_offset = 0, .mask = 1 << 4, },
+        { .reg_offset = 0, .mask = 1 << 5, },
+        { .reg_offset = 0, .mask = 1 << 6, },
+        { .reg_offset = 0, .mask = 1 << 7, },
+        { .reg_offset = 1, .mask = 1 << 0, },
+        { .reg_offset = 1, .mask = 1 << 1, },
+};
+
+static const struct regmap_irq_chip max8907_on_off_irq_chip = {
+        .name = "max8907 on_off",
+        .status_base = MAX8907_REG_ON_OFF_IRQ1,
+        .mask_base = MAX8907_REG_ON_OFF_IRQ1_MASK,
+        .irq_reg_stride = MAX8907_REG_ON_OFF_IRQ2 - MAX8907_REG_ON_OFF_IRQ1,
+        .num_regs = 2,
+        .irqs = max8907_on_off_irqs,
+        .num_irqs = ARRAY_SIZE(max8907_on_off_irqs),
+};
+
+static const struct regmap_irq max8907_rtc_irqs[] = {
+        { .reg_offset = 0, .mask = 1 << 2, },
+        { .reg_offset = 0, .mask = 1 << 3, },
+};
+
+static const struct regmap_irq_chip max8907_rtc_irq_chip = {
+        .name = "max8907 rtc",
+        .status_base = MAX8907_REG_RTC_IRQ,
+        .mask_base = MAX8907_REG_RTC_IRQ_MASK,
+        .num_regs = 1,
+        .irqs = max8907_rtc_irqs,
+        .num_irqs = ARRAY_SIZE(max8907_rtc_irqs),
+};
+
+static __devinit int max8907_i2c_probe(struct i2c_client *i2c,
+                                       const struct i2c_device_id *id)
+{
+        struct max8907 *max8907;
+        int ret;
+
+        max8907 = devm_kzalloc(&i2c->dev, sizeof(struct max8907), GFP_KERNEL);
+        if (!max8907) {
+                ret = -ENOMEM;
+                goto err_alloc_drvdata;
+        }
+
+        max8907->dev = &i2c->dev;
+        dev_set_drvdata(max8907->dev, max8907);
+
+        max8907->i2c_gen = i2c;
+        i2c_set_clientdata(i2c, max8907);
+        max8907->regmap_gen = devm_regmap_init_i2c(i2c,
+                                                &max8907_regmap_gen_config);
+        if (IS_ERR(max8907->regmap_gen)) {
+                ret = PTR_ERR(max8907->regmap_gen);
+                dev_err(&i2c->dev, "gen regmap init failed: %d\n", ret);
+                goto err_regmap_gen;
+        }
+
+        max8907->i2c_rtc = i2c_new_dummy(i2c->adapter, MAX8907_RTC_I2C_ADDR);
+        if (!max8907->i2c_rtc) {
+                ret = -ENOMEM;
+                goto err_dummy_rtc;
+        }
+        i2c_set_clientdata(max8907->i2c_rtc, max8907);
+        max8907->regmap_rtc = devm_regmap_init_i2c(max8907->i2c_rtc,
+                                                &max8907_regmap_rtc_config);
+        if (IS_ERR(max8907->regmap_rtc)) {
+                ret = PTR_ERR(max8907->regmap_rtc);
+                dev_err(&i2c->dev, "rtc regmap init failed: %d\n", ret);
+                goto err_regmap_rtc;
+        }
+
+        irq_set_status_flags(max8907->i2c_gen->irq, IRQ_NOAUTOEN);
+
+        ret = regmap_add_irq_chip(max8907->regmap_gen, max8907->i2c_gen->irq,
+                                  IRQF_ONESHOT | IRQF_SHARED, -1,
+                                  &max8907_chg_irq_chip,
+                                  &max8907->irqc_chg);
+        if (ret != 0) {
+                dev_err(&i2c->dev, "failed to add chg irq chip: %d\n", ret);
+                goto err_irqc_chg;
+        }
+        ret = regmap_add_irq_chip(max8907->regmap_gen, max8907->i2c_gen->irq,
+                                  IRQF_ONESHOT | IRQF_SHARED, -1,
+                                  &max8907_on_off_irq_chip,
+                                  &max8907->irqc_on_off);
+        if (ret != 0) {
+                dev_err(&i2c->dev, "failed to add on off irq chip: %d\n", ret);
+                goto err_irqc_on_off;
+        }
+        ret = regmap_add_irq_chip(max8907->regmap_rtc, max8907->i2c_gen->irq,
+                                  IRQF_ONESHOT | IRQF_SHARED, -1,
+                                  &max8907_rtc_irq_chip,
+                                  &max8907->irqc_rtc);
+        if (ret != 0) {
+                dev_err(&i2c->dev, "failed to add rtc irq chip: %d\n", ret);
+                goto err_irqc_rtc;
+        }
+
+        enable_irq(max8907->i2c_gen->irq);
+
+        ret = mfd_add_devices(max8907->dev, -1, max8907_cells,
+                              ARRAY_SIZE(max8907_cells), NULL, 0, NULL);
+        if (ret != 0) {
+                dev_err(&i2c->dev, "failed to add MFD devices %d\n", ret);
+                goto err_add_devices;
+        }
+
+        return 0;
+
+err_add_devices:
+        regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_rtc);
+err_irqc_rtc:
+        regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_on_off);
+err_irqc_on_off:
+        regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_chg);
+err_irqc_chg:
+err_regmap_rtc:
+        i2c_unregister_device(max8907->i2c_rtc);
+err_dummy_rtc:
+err_regmap_gen:
+err_alloc_drvdata:
+        return ret;
+}
+
+static __devexit int max8907_i2c_remove(struct i2c_client *i2c)
+{
+        struct max8907 *max8907 = i2c_get_clientdata(i2c);
+
+        mfd_remove_devices(max8907->dev);
+
+        regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_rtc);
+        regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_on_off);
+        regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_chg);
+
+        i2c_unregister_device(max8907->i2c_rtc);
+
+        return 0;
+}
+
+#ifdef CONFIG_OF
+static struct of_device_id max8907_of_match[] = {
+        { .compatible = "maxim,max8907" },
+        { },
+};
+MODULE_DEVICE_TABLE(of, max8907_of_match);
+#endif
+
+static const struct i2c_device_id max8907_i2c_id[] = {
+        {"max8907", 0},
+        {}
+};
+MODULE_DEVICE_TABLE(i2c, max8907_i2c_id);
+
+static struct i2c_driver max8907_i2c_driver = {
+        .driver = {
+                .name = "max8907",
+                .owner = THIS_MODULE,
+                .of_match_table = of_match_ptr(max8907_of_match),
+        },
+        .probe = max8907_i2c_probe,
+        .remove = max8907_i2c_remove,
+        .id_table = max8907_i2c_id,
+};
+
+static int __init max8907_i2c_init(void)
+{
+        int ret = -ENODEV;
+
+        ret = i2c_add_driver(&max8907_i2c_driver);
+        if (ret != 0)
+                pr_err("Failed to register I2C driver: %d\n", ret);
+
+        return ret;
+}
+subsys_initcall(max8907_i2c_init);
+
+static void __exit max8907_i2c_exit(void)
+{
+        i2c_del_driver(&max8907_i2c_driver);
+}
+module_exit(max8907_i2c_exit);
+
+MODULE_DESCRIPTION("MAX8907 multi-function core driver");
+MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@maxim-ic.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/max8907.h b/include/linux/mfd/max8907.h
new file mode 100644
index 000000000000..283531fde4e0
--- /dev/null
+++ b/include/linux/mfd/max8907.h
@@ -0,0 +1,250 @@
+/*
+ * Functions to access MAX8907 power management chip.
+ *
+ * Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com>
+ * Copyright (C) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * 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_MAX8907_H
+#define __LINUX_MFD_MAX8907_H
+
+#include <linux/mutex.h>
+#include <linux/pm.h>
+
+#define MAX8907_GEN_I2C_ADDR            (0x78 >> 1)
+#define MAX8907_ADC_I2C_ADDR            (0x8e >> 1)
+#define MAX8907_RTC_I2C_ADDR            (0xd0 >> 1)
+
+/* MAX8907 register map */
+#define MAX8907_REG_SYSENSEL            0x00
+#define MAX8907_REG_ON_OFF_IRQ1         0x01
+#define MAX8907_REG_ON_OFF_IRQ1_MASK    0x02
+#define MAX8907_REG_ON_OFF_STAT         0x03
+#define MAX8907_REG_SDCTL1              0x04
+#define MAX8907_REG_SDSEQCNT1           0x05
+#define MAX8907_REG_SDV1                0x06
+#define MAX8907_REG_SDCTL2              0x07
+#define MAX8907_REG_SDSEQCNT2           0x08
+#define MAX8907_REG_SDV2                0x09
+#define MAX8907_REG_SDCTL3              0x0A
+#define MAX8907_REG_SDSEQCNT3           0x0B
+#define MAX8907_REG_SDV3                0x0C
+#define MAX8907_REG_ON_OFF_IRQ2         0x0D
+#define MAX8907_REG_ON_OFF_IRQ2_MASK    0x0E
+#define MAX8907_REG_RESET_CNFG          0x0F
+#define MAX8907_REG_LDOCTL16            0x10
+#define MAX8907_REG_LDOSEQCNT16         0x11
+#define MAX8907_REG_LDO16VOUT           0x12
+#define MAX8907_REG_SDBYSEQCNT          0x13
+#define MAX8907_REG_LDOCTL17            0x14
+#define MAX8907_REG_LDOSEQCNT17         0x15
+#define MAX8907_REG_LDO17VOUT           0x16
+#define MAX8907_REG_LDOCTL1             0x18
+#define MAX8907_REG_LDOSEQCNT1          0x19
+#define MAX8907_REG_LDO1VOUT            0x1A
+#define MAX8907_REG_LDOCTL2             0x1C
+#define MAX8907_REG_LDOSEQCNT2          0x1D
+#define MAX8907_REG_LDO2VOUT            0x1E
+#define MAX8907_REG_LDOCTL3             0x20
+#define MAX8907_REG_LDOSEQCNT3          0x21
+#define MAX8907_REG_LDO3VOUT            0x22
+#define MAX8907_REG_LDOCTL4             0x24
+#define MAX8907_REG_LDOSEQCNT4          0x25
+#define MAX8907_REG_LDO4VOUT            0x26
+#define MAX8907_REG_LDOCTL5             0x28
+#define MAX8907_REG_LDOSEQCNT5          0x29
+#define MAX8907_REG_LDO5VOUT            0x2A
+#define MAX8907_REG_LDOCTL6             0x2C
+#define MAX8907_REG_LDOSEQCNT6          0x2D
+#define MAX8907_REG_LDO6VOUT            0x2E
+#define MAX8907_REG_LDOCTL7             0x30
+#define MAX8907_REG_LDOSEQCNT7          0x31
+#define MAX8907_REG_LDO7VOUT            0x32
+#define MAX8907_REG_LDOCTL8             0x34
+#define MAX8907_REG_LDOSEQCNT8          0x35
+#define MAX8907_REG_LDO8VOUT            0x36
+#define MAX8907_REG_LDOCTL9             0x38
+#define MAX8907_REG_LDOSEQCNT9          0x39
+#define MAX8907_REG_LDO9VOUT            0x3A
+#define MAX8907_REG_LDOCTL10            0x3C
+#define MAX8907_REG_LDOSEQCNT10         0x3D
+#define MAX8907_REG_LDO10VOUT           0x3E
+#define MAX8907_REG_LDOCTL11            0x40
+#define MAX8907_REG_LDOSEQCNT11         0x41
+#define MAX8907_REG_LDO11VOUT           0x42
+#define MAX8907_REG_LDOCTL12            0x44
+#define MAX8907_REG_LDOSEQCNT12         0x45
+#define MAX8907_REG_LDO12VOUT           0x46
+#define MAX8907_REG_LDOCTL13            0x48
+#define MAX8907_REG_LDOSEQCNT13         0x49
+#define MAX8907_REG_LDO13VOUT           0x4A
+#define MAX8907_REG_LDOCTL14            0x4C
+#define MAX8907_REG_LDOSEQCNT14         0x4D
+#define MAX8907_REG_LDO14VOUT           0x4E
+#define MAX8907_REG_LDOCTL15            0x50
+#define MAX8907_REG_LDOSEQCNT15         0x51
+#define MAX8907_REG_LDO15VOUT           0x52
+#define MAX8907_REG_OUT5VEN             0x54
+#define MAX8907_REG_OUT5VSEQ            0x55
+#define MAX8907_REG_OUT33VEN            0x58
+#define MAX8907_REG_OUT33VSEQ           0x59
+#define MAX8907_REG_LDOCTL19            0x5C
+#define MAX8907_REG_LDOSEQCNT19         0x5D
+#define MAX8907_REG_LDO19VOUT           0x5E
+#define MAX8907_REG_LBCNFG              0x60
+#define MAX8907_REG_SEQ1CNFG            0x64
+#define MAX8907_REG_SEQ2CNFG            0x65
+#define MAX8907_REG_SEQ3CNFG            0x66
+#define MAX8907_REG_SEQ4CNFG            0x67
+#define MAX8907_REG_SEQ5CNFG            0x68
+#define MAX8907_REG_SEQ6CNFG            0x69
+#define MAX8907_REG_SEQ7CNFG            0x6A
+#define MAX8907_REG_LDOCTL18            0x72
+#define MAX8907_REG_LDOSEQCNT18         0x73
+#define MAX8907_REG_LDO18VOUT           0x74
+#define MAX8907_REG_BBAT_CNFG           0x78
+#define MAX8907_REG_CHG_CNTL1           0x7C
+#define MAX8907_REG_CHG_CNTL2           0x7D
+#define MAX8907_REG_CHG_IRQ1            0x7E
+#define MAX8907_REG_CHG_IRQ2            0x7F
+#define MAX8907_REG_CHG_IRQ1_MASK       0x80
+#define MAX8907_REG_CHG_IRQ2_MASK       0x81
+#define MAX8907_REG_CHG_STAT            0x82
+#define MAX8907_REG_WLED_MODE_CNTL      0x84
+#define MAX8907_REG_ILED_CNTL           0x84
+#define MAX8907_REG_II1RR               0x8E
+#define MAX8907_REG_II2RR               0x8F
+#define MAX8907_REG_LDOCTL20            0x9C
+#define MAX8907_REG_LDOSEQCNT20         0x9D
+#define MAX8907_REG_LDO20VOUT           0x9E
+
+/* RTC register map */
+#define MAX8907_REG_RTC_SEC             0x00
+#define MAX8907_REG_RTC_MIN             0x01
+#define MAX8907_REG_RTC_HOURS           0x02
+#define MAX8907_REG_RTC_WEEKDAY         0x03
+#define MAX8907_REG_RTC_DATE            0x04
+#define MAX8907_REG_RTC_MONTH           0x05
+#define MAX8907_REG_RTC_YEAR1           0x06
+#define MAX8907_REG_RTC_YEAR2           0x07
+#define MAX8907_REG_ALARM0_SEC          0x08
+#define MAX8907_REG_ALARM0_MIN          0x09
+#define MAX8907_REG_ALARM0_HOURS        0x0A
+#define MAX8907_REG_ALARM0_WEEKDAY      0x0B
+#define MAX8907_REG_ALARM0_DATE         0x0C
+#define MAX8907_REG_ALARM0_MONTH        0x0D
+#define MAX8907_REG_ALARM0_YEAR1        0x0E
+#define MAX8907_REG_ALARM0_YEAR2        0x0F
+#define MAX8907_REG_ALARM1_SEC          0x10
+#define MAX8907_REG_ALARM1_MIN          0x11
+#define MAX8907_REG_ALARM1_HOURS        0x12
+#define MAX8907_REG_ALARM1_WEEKDAY      0x13
+#define MAX8907_REG_ALARM1_DATE         0x14
+#define MAX8907_REG_ALARM1_MONTH        0x15
+#define MAX8907_REG_ALARM1_YEAR1        0x16
+#define MAX8907_REG_ALARM1_YEAR2        0x17
+#define MAX8907_REG_ALARM0_CNTL         0x18
+#define MAX8907_REG_ALARM1_CNTL         0x19
+#define MAX8907_REG_RTC_STATUS          0x1A
+#define MAX8907_REG_RTC_CNTL            0x1B
+#define MAX8907_REG_RTC_IRQ             0x1C
+#define MAX8907_REG_RTC_IRQ_MASK        0x1D
+#define MAX8907_REG_MPL_CNTL            0x1E
+
+/* ADC and Touch Screen Controller register map */
+#define MAX8907_CTL                     0
+#define MAX8907_SEQCNT                  1
+#define MAX8907_VOUT                    2
+
+/* mask bit fields */
+#define MAX8907_MASK_LDO_SEQ            0x1C
+#define MAX8907_MASK_LDO_EN             0x01
+#define MAX8907_MASK_VBBATTCV           0x03
+#define MAX8907_MASK_OUT5V_VINEN        0x10
+#define MAX8907_MASK_OUT5V_ENSRC        0x0E
+#define MAX8907_MASK_OUT5V_EN           0x01
+
+/* Regulator IDs */
+#define MAX8907_MBATT   0
+#define MAX8907_SD1     1
+#define MAX8907_SD2     2
+#define MAX8907_SD3     3
+#define MAX8907_LDO1    4
+#define MAX8907_LDO2    5
+#define MAX8907_LDO3    6
+#define MAX8907_LDO4    7
+#define MAX8907_LDO5    8
+#define MAX8907_LDO6    9
+#define MAX8907_LDO7    10
+#define MAX8907_LDO8    11
+#define MAX8907_LDO9    12
+#define MAX8907_LDO10   13
+#define MAX8907_LDO11   14
+#define MAX8907_LDO12   15
+#define MAX8907_LDO13   16
+#define MAX8907_LDO14   17
+#define MAX8907_LDO15   18
+#define MAX8907_LDO16   19
+#define MAX8907_LDO17   20
+#define MAX8907_LDO18   21
+#define MAX8907_LDO19   22
+#define MAX8907_LDO20   23
+#define MAX8907_OUT5V   24
+#define MAX8907_OUT33V  25
+#define MAX8907_BBAT    26
+#define MAX8907_SDBY    27
+#define MAX8907_VRTC    28
+#define MAX8907_NUM_REGULATORS (MAX8907_VRTC + 1)
+
+/* IRQ definitions */
+enum {
+        MAX8907_IRQ_VCHG_DC_OVP = 0,
+        MAX8907_IRQ_VCHG_DC_F,
+        MAX8907_IRQ_VCHG_DC_R,
+        MAX8907_IRQ_VCHG_THM_OK_R,
+        MAX8907_IRQ_VCHG_THM_OK_F,
+        MAX8907_IRQ_VCHG_MBATTLOW_F,
+        MAX8907_IRQ_VCHG_MBATTLOW_R,
+        MAX8907_IRQ_VCHG_RST,
+        MAX8907_IRQ_VCHG_DONE,
+        MAX8907_IRQ_VCHG_TOPOFF,
+        MAX8907_IRQ_VCHG_TMR_FAULT,
+
+        MAX8907_IRQ_GPM_RSTIN = 0,
+        MAX8907_IRQ_GPM_MPL,
+        MAX8907_IRQ_GPM_SW_3SEC,
+        MAX8907_IRQ_GPM_EXTON_F,
+        MAX8907_IRQ_GPM_EXTON_R,
+        MAX8907_IRQ_GPM_SW_1SEC,
+        MAX8907_IRQ_GPM_SW_F,
+        MAX8907_IRQ_GPM_SW_R,
+        MAX8907_IRQ_GPM_SYSCKEN_F,
+        MAX8907_IRQ_GPM_SYSCKEN_R,
+
+        MAX8907_IRQ_RTC_ALARM1 = 0,
+        MAX8907_IRQ_RTC_ALARM0,
+};
+
+struct max8907_platform_data {
+        struct regulator_init_data *init_data[MAX8907_NUM_REGULATORS];
+};
+
+struct regmap_irq_chips_data;
+
+struct max8907 {
+        struct device                   *dev;
+        struct mutex                    irq_lock;
+        struct i2c_client               *i2c_gen;
+        struct i2c_client               *i2c_rtc;
+        struct regmap                   *regmap_gen;
+        struct regmap                   *regmap_rtc;
+        struct regmap_irq_chip_data     *irqc_chg;
+        struct regmap_irq_chip_data     *irqc_on_off;
+        struct regmap_irq_chip_data     *irqc_rtc;
+};
+
+#endif