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    Subject[PATCH v4 1/2] MFD: MAX77693: add MAX77693 MFD driver
    Date
    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>
    ---
    drivers/mfd/Kconfig | 12 ++
    drivers/mfd/Makefile | 1 +
    drivers/mfd/max77693.c | 217 ++++++++++++++++++++++++++++++++++
    include/linux/mfd/max77693-private.h | 217 ++++++++++++++++++++++++++++++++++
    include/linux/mfd/max77693.h | 37 ++++++
    5 files changed, 484 insertions(+), 0 deletions(-)
    create mode 100644 drivers/mfd/max77693.c
    create mode 100644 include/linux/mfd/max77693-private.h
    create mode 100644 include/linux/mfd/max77693.h

    diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
    index 11e4438..a8619eb 100644
    --- a/drivers/mfd/Kconfig
    +++ b/drivers/mfd/Kconfig
    @@ -452,6 +452,18 @@ config MFD_S5M_CORE
    additional drivers must be enabled in order to use the functionality
    of the device

    +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_WM8400
    tristate "Support Wolfson Microelectronics WM8400"
    select MFD_CORE
    diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
    index 05fa538..ae18cf1 100644
    --- a/drivers/mfd/Makefile
    +++ b/drivers/mfd/Makefile
    @@ -79,6 +79,7 @@ max8925-objs := max8925-core.o max8925-i2c.o
    obj-$(CONFIG_MFD_MAX8925) += max8925.o
    obj-$(CONFIG_MFD_MAX8997) += max8997.o max8997-irq.o
    obj-$(CONFIG_MFD_MAX8998) += max8998.o max8998-irq.o
    +obj-$(CONFIG_MFD_MAX77693) += max77693.o

    pcf50633-objs := pcf50633-core.o pcf50633-irq.o
    obj-$(CONFIG_MFD_PCF50633) += pcf50633.o
    diff --git a/drivers/mfd/max77693.c b/drivers/mfd/max77693.c
    new file mode 100644
    index 0000000..c852515
    --- /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 0000000..bf6077d
    --- /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 0000000..5020b86
    --- /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 */
    --
    1.7.0.4


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