mfd: Add MAX77693 driver

This patch adds MFD driver for MAX77693 to enable its sub devices.

The MAX77693 is a multi-function devices. It includes PMIC,
MUIC(Micro USB Interface Controller), flash LED control and
haptic motor control.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

5 files changed, 484 insertions, 0 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index af46ce019fc7..a0e1b834af61 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -420,6 +420,18 @@ config PMIC_ADP5520
           individual components like LCD backlight, LEDs, GPIOs and Kepad
           under the corresponding menus.
 
+config MFD_MAX77693
+        bool "Maxim Semiconductor MAX77693 PMIC Support"
+        depends on I2C=y && GENERIC_HARDIRQS
+        select MFD_CORE
+        help
+          Say yes here to support for Maxim Semiconductor MAX77693.
+          This is a companion Power Management IC with Flash, Haptic, Charger,
+          and MUIC(Micro USB Interface Controller) 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_MAX8925
         bool "Maxim Semiconductor MAX8925 PMIC Support"
         depends on I2C=y && GENERIC_HARDIRQS
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index d3dae9567800..db0262b34af6 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -78,6 +78,7 @@ obj-$(CONFIG_PMIC_DA9052)	+= da9052-core.o
 obj-$(CONFIG_MFD_DA9052_SPI)    += da9052-spi.o
 obj-$(CONFIG_MFD_DA9052_I2C)    += da9052-i2c.o
 
+obj-$(CONFIG_MFD_MAX77693)      += max77693.o
 max8925-objs                    := max8925-core.o max8925-i2c.o
 obj-$(CONFIG_MFD_MAX8925)       += max8925.o
 obj-$(CONFIG_MFD_MAX8997)       += max8997.o max8997-irq.o
diff --git a/drivers/mfd/max77693.c b/drivers/mfd/max77693.c
new file mode 100644
index 000000000000..c852515e68c8
--- /dev/null
+++ b/drivers/mfd/max77693.c
@@ -0,0 +1,217 @@
+/*
+ * max77693.c - mfd core driver for the MAX 77693
+ *
+ * Copyright (C) 2012 Samsung Electronics
+ * SangYoung Son <hello.son@smasung.com>
+ *
+ * This program is not provided / owned by Maxim Integrated Products.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * This driver is based on max8997.c
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/pm_runtime.h>
+#include <linux/mutex.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max77693.h>
+#include <linux/mfd/max77693-private.h>
+#include <linux/regulator/machine.h>
+#include <linux/regmap.h>
+
+#define I2C_ADDR_PMIC   (0xCC >> 1)     /* Charger, Flash LED */
+#define I2C_ADDR_MUIC   (0x4A >> 1)
+#define I2C_ADDR_HAPTIC (0x90 >> 1)
+
+static struct mfd_cell max77693_devs[] = {
+        { .name = "max77693-pmic", },
+        { .name = "max77693-charger", },
+        { .name = "max77693-flash", },
+        { .name = "max77693-muic", },
+        { .name = "max77693-haptic", },
+};
+
+int max77693_read_reg(struct regmap *map, u8 reg, u8 *dest)
+{
+        unsigned int val;
+        int ret;
+
+        ret = regmap_read(map, reg, &val);
+        *dest = val;
+
+        return ret;
+}
+EXPORT_SYMBOL_GPL(max77693_read_reg);
+
+int max77693_bulk_read(struct regmap *map, u8 reg, int count, u8 *buf)
+{
+        int ret;
+
+        ret = regmap_bulk_read(map, reg, buf, count);
+
+        return ret;
+}
+EXPORT_SYMBOL_GPL(max77693_bulk_read);
+
+int max77693_write_reg(struct regmap *map, u8 reg, u8 value)
+{
+        int ret;
+
+        ret = regmap_write(map, reg, value);
+
+        return ret;
+}
+EXPORT_SYMBOL_GPL(max77693_write_reg);
+
+int max77693_bulk_write(struct regmap *map, u8 reg, int count, u8 *buf)
+{
+        int ret;
+
+        ret = regmap_bulk_write(map, reg, buf, count);
+
+        return ret;
+}
+EXPORT_SYMBOL_GPL(max77693_bulk_write);
+
+int max77693_update_reg(struct regmap *map, u8 reg, u8 val, u8 mask)
+{
+        int ret;
+
+        ret = regmap_update_bits(map, reg, mask, val);
+
+        return ret;
+}
+EXPORT_SYMBOL_GPL(max77693_update_reg);
+
+static const struct regmap_config max77693_regmap_config = {
+        .reg_bits = 8,
+        .val_bits = 8,
+        .max_register = MAX77693_PMIC_REG_END,
+};
+
+static int max77693_i2c_probe(struct i2c_client *i2c,
+                              const struct i2c_device_id *id)
+{
+        struct max77693_dev *max77693;
+        struct max77693_platform_data *pdata = i2c->dev.platform_data;
+        u8 reg_data;
+        int ret = 0;
+
+        max77693 = devm_kzalloc(&i2c->dev,
+                        sizeof(struct max77693_dev), GFP_KERNEL);
+        if (max77693 == NULL)
+                return -ENOMEM;
+
+        max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
+        if (IS_ERR(max77693->regmap)) {
+                ret = PTR_ERR(max77693->regmap);
+                dev_err(max77693->dev,"failed to allocate register map: %d\n",
+                                ret);
+                goto err_regmap;
+        }
+
+        i2c_set_clientdata(i2c, max77693);
+        max77693->dev = &i2c->dev;
+        max77693->i2c = i2c;
+        max77693->irq = i2c->irq;
+        max77693->type = id->driver_data;
+
+        if (!pdata)
+                goto err_regmap;
+
+        max77693->wakeup = pdata->wakeup;
+
+        mutex_init(&max77693->iolock);
+
+        if (max77693_read_reg(max77693->regmap,
+                                MAX77693_PMIC_REG_PMIC_ID2, &reg_data) < 0) {
+                dev_err(max77693->dev, "device not found on this channel\n");
+                ret = -ENODEV;
+                goto err_regmap;
+        } else
+                dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
+
+        max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
+        i2c_set_clientdata(max77693->muic, max77693);
+
+        max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
+        i2c_set_clientdata(max77693->haptic, max77693);
+
+        pm_runtime_set_active(max77693->dev);
+
+        ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
+                        ARRAY_SIZE(max77693_devs), NULL, 0);
+        if (ret < 0)
+                goto err_mfd;
+
+        return ret;
+
+err_mfd:
+        i2c_unregister_device(max77693->muic);
+        i2c_unregister_device(max77693->haptic);
+err_regmap:
+        kfree(max77693);
+
+        return ret;
+}
+
+static int max77693_i2c_remove(struct i2c_client *i2c)
+{
+        struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
+
+        mfd_remove_devices(max77693->dev);
+        i2c_unregister_device(max77693->muic);
+        i2c_unregister_device(max77693->haptic);
+
+        return 0;
+}
+
+static const struct i2c_device_id max77693_i2c_id[] = {
+        { "max77693", TYPE_MAX77693 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
+
+static struct i2c_driver max77693_i2c_driver = {
+        .driver = {
+                   .name = "max77693",
+                   .owner = THIS_MODULE,
+        },
+        .probe = max77693_i2c_probe,
+        .remove = max77693_i2c_remove,
+        .id_table = max77693_i2c_id,
+};
+
+static int __init max77693_i2c_init(void)
+{
+        return i2c_add_driver(&max77693_i2c_driver);
+}
+/* init early so consumer devices can complete system boot */
+subsys_initcall(max77693_i2c_init);
+
+static void __exit max77693_i2c_exit(void)
+{
+        i2c_del_driver(&max77693_i2c_driver);
+}
+module_exit(max77693_i2c_exit);
+
+MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
+MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/max77693-private.h b/include/linux/mfd/max77693-private.h
new file mode 100644
index 000000000000..bf6077d3c43c
--- /dev/null
+++ b/include/linux/mfd/max77693-private.h
@@ -0,0 +1,217 @@
+/*
+ * max77693-private.h - Voltage regulator driver for the Maxim 77693
+ *
+ *  Copyright (C) 2012 Samsung Electrnoics
+ *  SangYoung Son <hello.son@samsung.com>
+ *
+ * This program is not provided / owned by Maxim Integrated Products.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef __LINUX_MFD_MAX77693_PRIV_H
+#define __LINUX_MFD_MAX77693_PRIV_H
+
+#include <linux/i2c.h>
+
+#define MAX77693_NUM_IRQ_MUIC_REGS      3
+#define MAX77693_REG_INVALID            (0xff)
+
+/* Slave addr = 0xCC: PMIC, Charger, Flash LED */
+enum max77693_pmic_reg {
+        MAX77693_LED_REG_IFLASH1                        = 0x00,
+        MAX77693_LED_REG_IFLASH2                        = 0x01,
+        MAX77693_LED_REG_ITORCH                         = 0x02,
+        MAX77693_LED_REG_ITORCHTIMER                    = 0x03,
+        MAX77693_LED_REG_FLASH_TIMER                    = 0x04,
+        MAX77693_LED_REG_FLASH_EN                       = 0x05,
+        MAX77693_LED_REG_MAX_FLASH1                     = 0x06,
+        MAX77693_LED_REG_MAX_FLASH2                     = 0x07,
+        MAX77693_LED_REG_MAX_FLASH3                     = 0x08,
+        MAX77693_LED_REG_MAX_FLASH4                     = 0x09,
+        MAX77693_LED_REG_VOUT_CNTL                      = 0x0A,
+        MAX77693_LED_REG_VOUT_FLASH1                    = 0x0B,
+        MAX77693_LED_REG_VOUT_FLASH2                    = 0x0C,
+        MAX77693_LED_REG_FLASH_INT                      = 0x0E,
+        MAX77693_LED_REG_FLASH_INT_MASK                 = 0x0F,
+        MAX77693_LED_REG_FLASH_INT_STATUS               = 0x10,
+
+        MAX77693_PMIC_REG_PMIC_ID1                      = 0x20,
+        MAX77693_PMIC_REG_PMIC_ID2                      = 0x21,
+        MAX77693_PMIC_REG_INTSRC                        = 0x22,
+        MAX77693_PMIC_REG_INTSRC_MASK                   = 0x23,
+        MAX77693_PMIC_REG_TOPSYS_INT                    = 0x24,
+        MAX77693_PMIC_REG_TOPSYS_INT_MASK               = 0x26,
+        MAX77693_PMIC_REG_TOPSYS_STAT                   = 0x28,
+        MAX77693_PMIC_REG_MAINCTRL1                     = 0x2A,
+        MAX77693_PMIC_REG_LSCNFG                        = 0x2B,
+
+        MAX77693_CHG_REG_CHG_INT                        = 0xB0,
+        MAX77693_CHG_REG_CHG_INT_MASK                   = 0xB1,
+        MAX77693_CHG_REG_CHG_INT_OK                     = 0xB2,
+        MAX77693_CHG_REG_CHG_DETAILS_00                 = 0xB3,
+        MAX77693_CHG_REG_CHG_DETAILS_01                 = 0xB4,
+        MAX77693_CHG_REG_CHG_DETAILS_02                 = 0xB5,
+        MAX77693_CHG_REG_CHG_DETAILS_03                 = 0xB6,
+        MAX77693_CHG_REG_CHG_CNFG_00                    = 0xB7,
+        MAX77693_CHG_REG_CHG_CNFG_01                    = 0xB8,
+        MAX77693_CHG_REG_CHG_CNFG_02                    = 0xB9,
+        MAX77693_CHG_REG_CHG_CNFG_03                    = 0xBA,
+        MAX77693_CHG_REG_CHG_CNFG_04                    = 0xBB,
+        MAX77693_CHG_REG_CHG_CNFG_05                    = 0xBC,
+        MAX77693_CHG_REG_CHG_CNFG_06                    = 0xBD,
+        MAX77693_CHG_REG_CHG_CNFG_07                    = 0xBE,
+        MAX77693_CHG_REG_CHG_CNFG_08                    = 0xBF,
+        MAX77693_CHG_REG_CHG_CNFG_09                    = 0xC0,
+        MAX77693_CHG_REG_CHG_CNFG_10                    = 0xC1,
+        MAX77693_CHG_REG_CHG_CNFG_11                    = 0xC2,
+        MAX77693_CHG_REG_CHG_CNFG_12                    = 0xC3,
+        MAX77693_CHG_REG_CHG_CNFG_13                    = 0xC4,
+        MAX77693_CHG_REG_CHG_CNFG_14                    = 0xC5,
+        MAX77693_CHG_REG_SAFEOUT_CTRL                   = 0xC6,
+
+        MAX77693_PMIC_REG_END,
+};
+
+/* Slave addr = 0x4A: MUIC */
+enum max77693_muic_reg {
+        MAX77693_MUIC_REG_ID            = 0x00,
+        MAX77693_MUIC_REG_INT1          = 0x01,
+        MAX77693_MUIC_REG_INT2          = 0x02,
+        MAX77693_MUIC_REG_INT3          = 0x03,
+        MAX77693_MUIC_REG_STATUS1       = 0x04,
+        MAX77693_MUIC_REG_STATUS2       = 0x05,
+        MAX77693_MUIC_REG_STATUS3       = 0x06,
+        MAX77693_MUIC_REG_INTMASK1      = 0x07,
+        MAX77693_MUIC_REG_INTMASK2      = 0x08,
+        MAX77693_MUIC_REG_INTMASK3      = 0x09,
+        MAX77693_MUIC_REG_CDETCTRL1     = 0x0A,
+        MAX77693_MUIC_REG_CDETCTRL2     = 0x0B,
+        MAX77693_MUIC_REG_CTRL1         = 0x0C,
+        MAX77693_MUIC_REG_CTRL2         = 0x0D,
+        MAX77693_MUIC_REG_CTRL3         = 0x0E,
+
+        MAX77693_MUIC_REG_END,
+};
+
+/* Slave addr = 0x90: Haptic */
+enum max77693_haptic_reg {
+        MAX77693_HAPTIC_REG_STATUS              = 0x00,
+        MAX77693_HAPTIC_REG_CONFIG1             = 0x01,
+        MAX77693_HAPTIC_REG_CONFIG2             = 0x02,
+        MAX77693_HAPTIC_REG_CONFIG_CHNL         = 0x03,
+        MAX77693_HAPTIC_REG_CONFG_CYC1          = 0x04,
+        MAX77693_HAPTIC_REG_CONFG_CYC2          = 0x05,
+        MAX77693_HAPTIC_REG_CONFIG_PER1         = 0x06,
+        MAX77693_HAPTIC_REG_CONFIG_PER2         = 0x07,
+        MAX77693_HAPTIC_REG_CONFIG_PER3         = 0x08,
+        MAX77693_HAPTIC_REG_CONFIG_PER4         = 0x09,
+        MAX77693_HAPTIC_REG_CONFIG_DUTY1        = 0x0A,
+        MAX77693_HAPTIC_REG_CONFIG_DUTY2        = 0x0B,
+        MAX77693_HAPTIC_REG_CONFIG_PWM1         = 0x0C,
+        MAX77693_HAPTIC_REG_CONFIG_PWM2         = 0x0D,
+        MAX77693_HAPTIC_REG_CONFIG_PWM3         = 0x0E,
+        MAX77693_HAPTIC_REG_CONFIG_PWM4         = 0x0F,
+        MAX77693_HAPTIC_REG_REV                 = 0x10,
+
+        MAX77693_HAPTIC_REG_END,
+};
+
+enum max77693_irq_source {
+        LED_INT = 0,
+        TOPSYS_INT,
+        CHG_INT,
+        MUIC_INT1,
+        MUIC_INT2,
+        MUIC_INT3,
+
+        MAX77693_IRQ_GROUP_NR,
+};
+
+enum max77693_irq {
+        /* PMIC - FLASH */
+        MAX77693_LED_IRQ_FLED2_OPEN,
+        MAX77693_LED_IRQ_FLED2_SHORT,
+        MAX77693_LED_IRQ_FLED1_OPEN,
+        MAX77693_LED_IRQ_FLED1_SHORT,
+        MAX77693_LED_IRQ_MAX_FLASH,
+
+        /* PMIC - TOPSYS */
+        MAX77693_TOPSYS_IRQ_T120C_INT,
+        MAX77693_TOPSYS_IRQ_T140C_INT,
+        MAX77693_TOPSYS_IRQ_LOWSYS_INT,
+
+        /* PMIC - Charger */
+        MAX77693_CHG_IRQ_BYP_I,
+        MAX77693_CHG_IRQ_THM_I,
+        MAX77693_CHG_IRQ_BAT_I,
+        MAX77693_CHG_IRQ_CHG_I,
+        MAX77693_CHG_IRQ_CHGIN_I,
+
+        /* MUIC INT1 */
+        MAX77693_MUIC_IRQ_INT1_ADC,
+        MAX77693_MUIC_IRQ_INT1_ADC_LOW,
+        MAX77693_MUIC_IRQ_INT1_ADC_ERR,
+        MAX77693_MUIC_IRQ_INT1_ADC1K,
+
+        /* MUIC INT2 */
+        MAX77693_MUIC_IRQ_INT2_CHGTYP,
+        MAX77693_MUIC_IRQ_INT2_CHGDETREUN,
+        MAX77693_MUIC_IRQ_INT2_DCDTMR,
+        MAX77693_MUIC_IRQ_INT2_DXOVP,
+        MAX77693_MUIC_IRQ_INT2_VBVOLT,
+        MAX77693_MUIC_IRQ_INT2_VIDRM,
+
+        /* MUIC INT3 */
+        MAX77693_MUIC_IRQ_INT3_EOC,
+        MAX77693_MUIC_IRQ_INT3_CGMBC,
+        MAX77693_MUIC_IRQ_INT3_OVP,
+        MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR,
+        MAX77693_MUIC_IRQ_INT3_CHG_ENABLED,
+        MAX77693_MUIC_IRQ_INT3_BAT_DET,
+
+        MAX77693_IRQ_NR,
+};
+
+struct max77693_dev {
+        struct device *dev;
+        struct i2c_client *i2c;         /* 0xCC , PMIC, Charger, Flash LED */
+        struct i2c_client *muic;        /* 0x4A , MUIC */
+        struct i2c_client *haptic;      /* 0x90 , Haptic */
+        struct mutex iolock;
+
+        int type;
+
+        struct regmap *regmap;
+        struct regmap *regmap_muic;
+        struct regmap *regmap_haptic;
+
+        int irq;
+        bool wakeup;
+};
+
+enum max77693_types {
+        TYPE_MAX77693,
+};
+
+extern int max77693_read_reg(struct regmap *map, u8 reg, u8 *dest);
+extern int max77693_bulk_read(struct regmap *map, u8 reg, int count,
+                                u8 *buf);
+extern int max77693_write_reg(struct regmap *map, u8 reg, u8 value);
+extern int max77693_bulk_write(struct regmap *map, u8 reg, int count,
+                                u8 *buf);
+extern int max77693_update_reg(struct regmap *map, u8 reg, u8 val, u8 mask);
+
+#endif /*  __LINUX_MFD_MAX77693_PRIV_H */
diff --git a/include/linux/mfd/max77693.h b/include/linux/mfd/max77693.h
new file mode 100644
index 000000000000..5020b8616daa
--- /dev/null
+++ b/include/linux/mfd/max77693.h
@@ -0,0 +1,37 @@
+/*
+ * max77693.h - Driver for the Maxim 77693
+ *
+ *  Copyright (C) 2012 Samsung Electrnoics
+ *  SangYoung Son <hello.son@samsung.com>
+ *
+ * This program is not provided / owned by Maxim Integrated Products.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * This driver is based on max8997.h
+ *
+ * MAX77693 has PMIC, Charger, Flash LED, Haptic, MUIC devices.
+ * The devices share the same I2C bus and included in
+ * this mfd driver.
+ */
+
+#ifndef __LINUX_MFD_MAX77693_H
+#define __LINUX_MFD_MAX77693_H
+
+struct max77693_platform_data {
+        /* IRQ */
+        int wakeup;
+};
+#endif  /* __LINUX_MFD_MAX77693_H */