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    Subject[PATCH] MFD : add MAX77686 mfd driver
    Date
    From: Chiwoong byun <woong.byun@samsung.com>

    This driver is for MAXIM 77686 mfd chip.
    It contains RTC, PMIC on it.
    They share same I2C bus and included in this mfd driver.

    Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com>
    Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
    Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
    ---
    drivers/mfd/Kconfig | 11 +
    drivers/mfd/Makefile | 1 +
    drivers/mfd/max77686-irq.c | 343 ++++++++++++++++++++++++++++
    drivers/mfd/max77686.c | 407 ++++++++++++++++++++++++++++++++++
    include/linux/mfd/max77686-private.h | 259 +++++++++++++++++++++
    include/linux/mfd/max77686.h | 137 ++++++++++++
    6 files changed, 1158 insertions(+), 0 deletions(-)
    create mode 100644 drivers/mfd/max77686-irq.c
    create mode 100644 drivers/mfd/max77686.c
    create mode 100644 include/linux/mfd/max77686-private.h
    create mode 100644 include/linux/mfd/max77686.h

    diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
    index 13a1789..998356f 100644
    --- a/drivers/mfd/Kconfig
    +++ b/drivers/mfd/Kconfig
    @@ -441,6 +441,17 @@ config MFD_MAX8998
    additional drivers must be enabled in order to use the functionality
    of the device.

    +config MFD_MAX77686
    + bool "Maxim Semiconductor MAX77686 PMIC Support"
    + depends on I2C=y && GENERIC_HARDIRQS
    + select MFD_CORE
    + help
    + Say yes here to support for Maxim Semiconductor MAX77686.
    + This is a Power Management IC with RTC 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_S5M_CORE
    bool "SAMSUNG S5M Series Support"
    depends on I2C=y && GENERIC_HARDIRQS
    diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
    index ddd9fa7..d93a7a6 100644
    --- a/drivers/mfd/Makefile
    +++ b/drivers/mfd/Makefile
    @@ -80,6 +80,7 @@ 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 max77693-irq.o
    +obj-$(CONFIG_MFD_MAX77693) += max77686.o max77686-irq.o

    pcf50633-objs := pcf50633-core.o pcf50633-irq.o
    obj-$(CONFIG_MFD_PCF50633) += pcf50633.o
    diff --git a/drivers/mfd/max77686-irq.c b/drivers/mfd/max77686-irq.c
    new file mode 100644
    index 0000000..c086da3
    --- /dev/null
    +++ b/drivers/mfd/max77686-irq.c
    @@ -0,0 +1,343 @@
    +/*
    + * max77686-irq.c - Interrupt controller support for MAX77686
    + *
    + * Copyright (C) 2012 Samsung Electronics Co.Ltd
    + * Chiwoong Byun <woong.byun@samsung.com>
    + *
    + * 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-irq.c
    + */
    +
    +#include <linux/err.h>
    +#include <linux/irq.h>
    +#include <linux/interrupt.h>
    +#include <linux/gpio.h>
    +#include <linux/mfd/max77686.h>
    +#include <linux/mfd/max77686-private.h>
    +
    +#undef MAX77686_IRQ_TEST
    +
    +enum {
    + MAX77686_DEBUG_IRQ_INFO = 1 << 0,
    + MAX77686_DEBUG_IRQ_MASK = 1 << 1,
    + MAX77686_DEBUG_IRQ_INT = 1 << 2,
    +};
    +
    +static int debug_mask = MAX77686_DEBUG_IRQ_INFO | MAX77686_DEBUG_IRQ_MASK |
    + MAX77686_DEBUG_IRQ_INT;
    +
    +static const u8 max77686_mask_reg[] = {
    + [PMIC_INT1] = MAX77686_REG_INT1MSK,
    + [PMIC_INT2] = MAX77686_REG_INT2MSK,
    + [RTC_INT] = MAX77686_RTC_INTM,
    +};
    +
    +static struct i2c_client *max77686_get_i2c(struct max77686_dev *max77686,
    + enum max77686_irq_source src)
    +{
    + switch (src) {
    + case PMIC_INT1 ... PMIC_INT2:
    + return max77686->i2c;
    + case RTC_INT:
    + return max77686->rtc;
    + default:
    + return ERR_PTR(-EINVAL);
    + }
    +}
    +
    +struct max77686_irq_data {
    + int mask;
    + enum max77686_irq_source group;
    +};
    +
    +static const struct max77686_irq_data max77686_irqs[] = {
    + [MAX77686_PMICIRQ_PWRONF] = { .group = PMIC_INT1, .mask = 1 << 0 },
    + [MAX77686_PMICIRQ_PWRONR] = { .group = PMIC_INT1, .mask = 1 << 1 },
    + [MAX77686_PMICIRQ_JIGONBF] = { .group = PMIC_INT1, .mask = 1 << 2 },
    + [MAX77686_PMICIRQ_JIGONBR] = { .group = PMIC_INT1, .mask = 1 << 3 },
    + [MAX77686_PMICIRQ_ACOKBF] = { .group = PMIC_INT1, .mask = 1 << 4 },
    + [MAX77686_PMICIRQ_ACOKBR] = { .group = PMIC_INT1, .mask = 1 << 5 },
    + [MAX77686_PMICIRQ_ONKEY1S] = { .group = PMIC_INT1, .mask = 1 << 6 },
    + [MAX77686_PMICIRQ_MRSTB] = { .group = PMIC_INT1, .mask = 1 << 7 },
    + [MAX77686_PMICIRQ_140C] = { .group = PMIC_INT2, .mask = 1 << 0 },
    + [MAX77686_PMICIRQ_120C] = { .group = PMIC_INT2, .mask = 1 << 1 },
    + [MAX77686_RTCIRQ_RTC60S] = { .group = RTC_INT, .mask = 1 << 0 },
    + [MAX77686_RTCIRQ_RTCA1] = { .group = RTC_INT, .mask = 1 << 1 },
    + [MAX77686_RTCIRQ_RTCA2] = { .group = RTC_INT, .mask = 1 << 2 },
    + [MAX77686_RTCIRQ_SMPL] = { .group = RTC_INT, .mask = 1 << 3 },
    + [MAX77686_RTCIRQ_RTC1S] = { .group = RTC_INT, .mask = 1 << 4 },
    + [MAX77686_RTCIRQ_WTSR] = { .group = RTC_INT, .mask = 1 << 5 },
    +};
    +
    +static void max77686_irq_lock(struct irq_data *data)
    +{
    + struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
    +
    + if (debug_mask & MAX77686_DEBUG_IRQ_MASK)
    + pr_debug("%s\n", __func__);
    +
    + mutex_lock(&max77686->irqlock);
    +}
    +
    +static void max77686_irq_sync_unlock(struct irq_data *data)
    +{
    + struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
    + int i;
    +
    + for (i = 0; i < MAX77686_IRQ_GROUP_NR; i++) {
    + u8 mask_reg = max77686_mask_reg[i];
    + struct i2c_client *i2c = max77686_get_i2c(max77686, i);
    +
    + if (debug_mask & MAX77686_DEBUG_IRQ_MASK)
    + pr_debug("%s: mask_reg[%d]=0x%x, cur=0x%x\n", __func__,
    + i, mask_reg, max77686->irq_masks_cur[i]);
    +
    + if (mask_reg == MAX77686_REG_INVALID ||
    + IS_ERR_OR_NULL(i2c))
    + continue;
    +
    + max77686->irq_masks_cache[i] = max77686->irq_masks_cur[i];
    +
    + max77686_write_reg(i2c, max77686_mask_reg[i],
    + max77686->irq_masks_cur[i]);
    + }
    +
    + mutex_unlock(&max77686->irqlock);
    +}
    +
    +static const inline struct max77686_irq_data *
    +irq_to_max77686_irq(struct max77686_dev *max77686, int irq)
    +{
    + return &max77686_irqs[irq - max77686->irq_base];
    +}
    +
    +static void max77686_irq_mask(struct irq_data *data)
    +{
    + struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
    + const struct max77686_irq_data *irq_data = irq_to_max77686_irq(max77686,
    + data->irq);
    +
    + max77686->irq_masks_cur[irq_data->group] |= irq_data->mask;
    +
    + if (debug_mask & MAX77686_DEBUG_IRQ_MASK)
    + pr_info("%s: group=%d, cur=0x%x\n",
    + __func__, irq_data->group,
    + max77686->irq_masks_cur[irq_data->group]);
    +}
    +
    +static void max77686_irq_unmask(struct irq_data *data)
    +{
    + struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
    + const struct max77686_irq_data *irq_data = irq_to_max77686_irq(max77686,
    + data->irq);
    +
    + max77686->irq_masks_cur[irq_data->group] &= ~irq_data->mask;
    +
    + if (debug_mask & MAX77686_DEBUG_IRQ_MASK)
    + pr_info("%s: group=%d, cur=0x%x\n",
    + __func__, irq_data->group,
    + max77686->irq_masks_cur[irq_data->group]);
    +}
    +
    +static struct irq_chip max77686_irq_chip = {
    + .name = "max77686",
    + .irq_bus_lock = max77686_irq_lock,
    + .irq_bus_sync_unlock = max77686_irq_sync_unlock,
    + .irq_mask = max77686_irq_mask,
    + .irq_unmask = max77686_irq_unmask,
    +};
    +
    +static irqreturn_t max77686_irq_thread(int irq, void *data)
    +{
    + struct max77686_dev *max77686 = data;
    + u8 irq_reg[MAX77686_IRQ_GROUP_NR] = {};
    + u8 irq_src;
    + int ret;
    + int i;
    +
    + ret = max77686_read_reg(max77686->i2c, MAX77686_REG_INTSRC, &irq_src);
    + if (ret < 0) {
    + dev_err(max77686->dev, "Failed to read interrupt source: %d\n",
    + ret);
    + return IRQ_NONE;
    + }
    +
    + if (debug_mask & MAX77686_DEBUG_IRQ_INT)
    + pr_info("%s: irq_src=0x%x\n", __func__, irq_src);
    +
    + /* MAX77686_IRQSRC_RTC may be set even if there are pending at INT1/2 */
    + ret = max77686_read_reg(max77686->i2c, MAX77686_REG_INT1, &irq_reg[0]);
    + ret = max77686_read_reg(max77686->i2c, MAX77686_REG_INT2, &irq_reg[1]);
    + if (ret < 0) {
    + dev_err(max77686->dev, "Failed to read pmic interrupt: %d\n",
    + ret);
    + return IRQ_NONE;
    + }
    +
    + if (debug_mask & MAX77686_DEBUG_IRQ_INT)
    + pr_info("%s: int1=0x%x, int2=0x%x\n",
    + __func__, irq_reg[PMIC_INT1], irq_reg[PMIC_INT2]);
    +
    + if (irq_src & MAX77686_IRQSRC_RTC) {
    +#ifdef CONFIG_RTC_DRV_MAX77686
    + ret = max77686_read_reg(max77686->rtc, MAX77686_RTC_INT,
    + &irq_reg[RTC_INT]);
    +#else
    + ret = -ENODEV;
    +#endif
    + if (ret < 0) {
    + dev_err(max77686->dev, "Failed to read rtc interrupt: %d\n",
    + ret);
    + return IRQ_NONE;
    + }
    +
    + if (debug_mask & MAX77686_DEBUG_IRQ_INT)
    + pr_info("%s: rtc int=0x%x\n", __func__,
    + irq_reg[RTC_INT]);
    + }
    +
    + for (i = 0; i < MAX77686_IRQ_NR; i++) {
    + if (irq_reg[max77686_irqs[i].group] & max77686_irqs[i].mask)
    + handle_nested_irq(max77686->irq_base + i);
    + }
    +
    + return IRQ_HANDLED;
    +}
    +
    +int max77686_irq_resume(struct max77686_dev *max77686)
    +{
    + if (max77686->irq && max77686->irq_base)
    + max77686_irq_thread(max77686->irq_base, max77686);
    + return 0;
    +}
    +
    +int max77686_irq_init(struct max77686_dev *max77686)
    +{
    + int i;
    + int cur_irq;
    + int ret;
    + int val;
    +#ifdef MAX77686_IRQ_TEST
    + u8 irq_reg[6] = { };
    + u8 irq_src;
    +#endif
    +
    + if (debug_mask & MAX77686_DEBUG_IRQ_INFO)
    + pr_info("%s+\n", __func__);
    +
    + if (!max77686->irq_gpio) {
    + dev_warn(max77686->dev, "No interrupt gpio specified.\n");
    + max77686->irq_base = 0;
    + return 0;
    + }
    +
    + if (!max77686->irq_base) {
    + dev_err(max77686->dev, "No interrupt base specified.\n");
    + return 0;
    + }
    +
    + mutex_init(&max77686->irqlock);
    +
    + max77686->irq = gpio_to_irq(max77686->irq_gpio);
    + ret = gpio_request(max77686->irq_gpio, "pmic_irq");
    + if (ret < 0 && ret != -EBUSY) {
    + dev_err(max77686->dev,
    + "Failed to request gpio %d with ret: %d\n",
    + max77686->irq_gpio, ret);
    + return IRQ_NONE;
    + }
    + if (ret == -EBUSY)
    + dev_warn(max77686->dev, "gpio pmic_irq is already requested\n");
    +
    + gpio_direction_input(max77686->irq_gpio);
    + val = gpio_get_value(max77686->irq_gpio);
    + gpio_free(max77686->irq_gpio);
    +
    + if (debug_mask & MAX77686_DEBUG_IRQ_INT)
    + pr_info("%s: gpio_irq=%x\n", __func__, val);
    +
    +#ifdef MAX77686_IRQ_TEST
    + ret = max77686_read_reg(max77686->i2c, MAX77686_REG_INTSRC, &irq_src);
    + if (ret < 0) {
    + dev_err(max77686->dev, "Failed to read interrupt source: %d\n",
    + ret);
    + return IRQ_NONE;
    + }
    +
    + pr_info("%s: irq_src=0x%x\n", __func__, irq_src);
    +
    + ret = max77686_bulk_read(max77686->i2c, MAX77686_REG_INT1, 6, irq_reg);
    + if (ret < 0) {
    + dev_err(max77686->dev, "Failed to read interrupt source: %d\n",
    + ret);
    + return IRQ_NONE;
    + }
    +
    + for (i = 0; i < 6; i++)
    + pr_info("%s: i[%d]=0x%x\n", __func__, i, irq_reg[i]);
    +#endif /* MAX77686_IRQ_TEST */
    +
    + /* Mask individual interrupt sources */
    + for (i = 0; i < MAX77686_IRQ_GROUP_NR; i++) {
    + struct i2c_client *i2c;
    +
    + max77686->irq_masks_cur[i] = 0xff;
    + max77686->irq_masks_cache[i] = 0xff;
    + i2c = max77686_get_i2c(max77686, i);
    +
    + if (IS_ERR_OR_NULL(i2c))
    + continue;
    + if (max77686_mask_reg[i] == MAX77686_REG_INVALID)
    + continue;
    +
    + max77686_write_reg(i2c, max77686_mask_reg[i], 0xff);
    + }
    +
    + /* Register with genirq */
    + for (i = 0; i < MAX77686_IRQ_NR; i++) {
    + cur_irq = i + max77686->irq_base;
    + irq_set_chip_data(cur_irq, max77686);
    + irq_set_chip_and_handler(cur_irq, &max77686_irq_chip,
    + handle_edge_irq);
    + irq_set_nested_thread(cur_irq, 1);
    +#ifdef CONFIG_ARM
    + set_irq_flags(cur_irq, IRQF_VALID);
    +#else
    + irq_set_noprobe(cur_irq);
    +#endif
    + }
    +
    + ret = request_threaded_irq(max77686->irq, NULL, max77686_irq_thread,
    + IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
    + "max77686-irq", max77686);
    +
    + if (ret) {
    + dev_err(max77686->dev, "Failed to request IRQ %d: %d\n",
    + max77686->irq, ret);
    + return ret;
    + }
    +
    + if (debug_mask & MAX77686_DEBUG_IRQ_INFO)
    + pr_info("%s-\n", __func__);
    +
    + return 0;
    +}
    +
    +void max77686_irq_exit(struct max77686_dev *max77686)
    +{
    + if (max77686->irq)
    + free_irq(max77686->irq, max77686);
    +}
    diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
    new file mode 100644
    index 0000000..77b325c
    --- /dev/null
    +++ b/drivers/mfd/max77686.c
    @@ -0,0 +1,407 @@
    +/*
    + * max77686.c - mfd core driver for the Maxim 77686
    + *
    + * Copyright (C) 2012 Samsung Electronics
    + * Chiwoong Byun <woong.byun@samsung.com>
    + *
    + * 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/slab.h>
    +#include <linux/i2c.h>
    +#include <linux/pm_runtime.h>
    +#include <linux/mutex.h>
    +#include <linux/mfd/core.h>
    +#include <linux/mfd/max77686.h>
    +#include <linux/mfd/max77686-private.h>
    +#include <linux/interrupt.h>
    +
    +#define I2C_ADDR_RTC (0x0C >> 1)
    +
    +static struct mfd_cell max77686_devs[] = {
    + { .name = "max77686-pmic", },
    +#ifdef CONFIG_RTC_DRV_MAX77686
    + { .name = "max77686-rtc", },
    +#endif
    +};
    +
    +int max77686_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
    +{
    + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
    + int ret;
    +
    + mutex_lock(&max77686->iolock);
    + ret = i2c_smbus_read_byte_data(i2c, reg);
    + mutex_unlock(&max77686->iolock);
    + if (ret < 0)
    + return ret;
    +
    + ret &= 0xff;
    + *dest = ret;
    + return 0;
    +}
    +EXPORT_SYMBOL_GPL(max77686_read_reg);
    +
    +int max77686_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
    +{
    + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
    + int ret;
    +
    + mutex_lock(&max77686->iolock);
    + ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
    + mutex_unlock(&max77686->iolock);
    + if (ret < 0)
    + return ret;
    +
    + return 0;
    +}
    +EXPORT_SYMBOL_GPL(max77686_bulk_read);
    +
    +int max77686_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
    +{
    + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
    + int ret;
    +
    + mutex_lock(&max77686->iolock);
    + ret = i2c_smbus_write_byte_data(i2c, reg, value);
    + mutex_unlock(&max77686->iolock);
    + return ret;
    +}
    +EXPORT_SYMBOL_GPL(max77686_write_reg);
    +
    +int max77686_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
    +{
    + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
    + int ret;
    +
    + mutex_lock(&max77686->iolock);
    + ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
    + mutex_unlock(&max77686->iolock);
    + if (ret < 0)
    + return ret;
    +
    + return 0;
    +}
    +EXPORT_SYMBOL_GPL(max77686_bulk_write);
    +
    +int max77686_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
    +{
    + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
    + int ret;
    +
    + mutex_lock(&max77686->iolock);
    + ret = i2c_smbus_read_byte_data(i2c, reg);
    + if (ret >= 0) {
    + u8 old_val = ret & 0xff;
    + u8 new_val = (val & mask) | (old_val & (~mask));
    + ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
    + }
    + mutex_unlock(&max77686->iolock);
    + return ret;
    +}
    +EXPORT_SYMBOL_GPL(max77686_update_reg);
    +
    +static int max77686_i2c_probe(struct i2c_client *i2c,
    + const struct i2c_device_id *id)
    +{
    + struct max77686_dev *max77686;
    + struct max77686_platform_data *pdata = i2c->dev.platform_data;
    + u8 data;
    + int ret = 0;
    +
    + max77686 = kzalloc(sizeof(struct max77686_dev), GFP_KERNEL);
    + if (max77686 == NULL)
    + return -ENOMEM;
    +
    + i2c_set_clientdata(i2c, max77686);
    + max77686->dev = &i2c->dev;
    + max77686->i2c = i2c;
    + max77686->type = id->driver_data;
    +
    + if (!pdata) {
    + ret = -EIO;
    + goto err;
    + }
    +
    + max77686->wakeup = pdata->wakeup;
    + max77686->irq_gpio = pdata->irq_gpio;
    + max77686->irq_base = pdata->irq_base;
    + max77686->wtsr_smpl = pdata->wtsr_smpl;
    +
    + mutex_init(&max77686->iolock);
    +
    + if (max77686_read_reg(i2c, MAX77686_REG_DEVICE_ID, &data) < 0) {
    + dev_err(max77686->dev,
    + "device not found on this channel (this is not an error)\n");
    + ret = -ENODEV;
    + goto err;
    + } else
    + dev_info(max77686->dev, "device found\n");
    +
    +#ifdef CONFIG_RTC_DRV_MAX77686
    + max77686->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
    + i2c_set_clientdata(max77686->rtc, max77686);
    +#endif
    +
    + max77686_irq_init(max77686);
    +
    + ret = mfd_add_devices(max77686->dev, -1, max77686_devs,
    + ARRAY_SIZE(max77686_devs), NULL, 0);
    +
    + if (ret < 0)
    + goto err_mfd;
    +
    + device_init_wakeup(max77686->dev, pdata->wakeup);
    +
    + return ret;
    +
    +err_mfd:
    + mfd_remove_devices(max77686->dev);
    +#ifdef CONFIG_RTC_DRV_MAX77686
    + i2c_unregister_device(max77686->rtc);
    +#endif
    +err:
    + kfree(max77686);
    + return ret;
    +}
    +
    +static int max77686_i2c_remove(struct i2c_client *i2c)
    +{
    + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
    +
    + mfd_remove_devices(max77686->dev);
    +#ifdef CONFIG_RTC_DRV_MAX77686
    + i2c_unregister_device(max77686->rtc);
    +#endif
    + kfree(max77686);
    +
    + return 0;
    +}
    +
    +static const struct i2c_device_id max77686_i2c_id[] = {
    + { "max77686", TYPE_MAX77686 },
    + { }
    +};
    +MODULE_DEVICE_TABLE(i2c, max77686_i2c_id);
    +
    +#ifdef CONFIG_PM
    +static int max77686_suspend(struct device *dev)
    +{
    + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
    + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
    +
    + disable_irq(max77686->irq);
    +
    + if (device_may_wakeup(dev))
    + enable_irq_wake(max77686->irq);
    +
    + return 0;
    +}
    +
    +static int max77686_resume(struct device *dev)
    +{
    + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
    + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
    +
    + if (device_may_wakeup(dev))
    + disable_irq_wake(max77686->irq);
    +
    + enable_irq(max77686->irq);
    +
    + return max77686_irq_resume(max77686);
    +}
    +#else
    +#define max77686_suspend NULL
    +#define max77686_resume NULL
    +#endif /* CONFIG_PM */
    +
    +#ifdef CONFIG_HIBERNATION
    +
    +u8 max77686_dumpaddr_pmic[] = {
    + MAX77686_REG_INT1MSK,
    + MAX77686_REG_INT2MSK,
    + MAX77686_REG_ONOFF_DELAY,
    + MAX77686_REG_MRSTB ,
    + /* Reserved: 0x0B-0x0F */
    + MAX77686_REG_BUCK1CTRL,
    + MAX77686_REG_BUCK1OUT,
    + MAX77686_REG_BUCK2CTRL1,
    + MAX77686_REG_BUCK234FREQ,
    + MAX77686_REG_BUCK2DVS1,
    + MAX77686_REG_BUCK2DVS2,
    + MAX77686_REG_BUCK2DVS3,
    + MAX77686_REG_BUCK2DVS4,
    + MAX77686_REG_BUCK2DVS5,
    + MAX77686_REG_BUCK2DVS6,
    + MAX77686_REG_BUCK2DVS7,
    + MAX77686_REG_BUCK2DVS8,
    + MAX77686_REG_BUCK3CTRL1,
    + /* Reserved: 0x1D */
    + MAX77686_REG_BUCK3DVS1,
    + MAX77686_REG_BUCK3DVS2,
    + MAX77686_REG_BUCK3DVS3,
    + MAX77686_REG_BUCK3DVS4,
    + MAX77686_REG_BUCK3DVS5,
    + MAX77686_REG_BUCK3DVS6,
    + MAX77686_REG_BUCK3DVS7,
    + MAX77686_REG_BUCK3DVS8,
    + MAX77686_REG_BUCK4CTRL1,
    + /* Reserved: 0x27 */
    + MAX77686_REG_BUCK4DVS1,
    + MAX77686_REG_BUCK4DVS2,
    + MAX77686_REG_BUCK4DVS3,
    + MAX77686_REG_BUCK4DVS4,
    + MAX77686_REG_BUCK4DVS5,
    + MAX77686_REG_BUCK4DVS6,
    + MAX77686_REG_BUCK4DVS7,
    + MAX77686_REG_BUCK4DVS8,
    + MAX77686_REG_BUCK5CTRL,
    + MAX77686_REG_BUCK5OUT,
    + MAX77686_REG_BUCK6CTRL,
    + MAX77686_REG_BUCK6OUT,
    + MAX77686_REG_BUCK7CTRL,
    + MAX77686_REG_BUCK7OUT,
    + MAX77686_REG_BUCK8CTRL,
    + MAX77686_REG_BUCK8OUT,
    + MAX77686_REG_BUCK9CTRL,
    + MAX77686_REG_BUCK9OUT,
    + /* Reserved: 0x3A-0x3F */
    + MAX77686_REG_LDO1CTRL1 ,
    + MAX77686_REG_LDO2CTRL1 ,
    + MAX77686_REG_LDO3CTRL1 ,
    + MAX77686_REG_LDO4CTRL1 ,
    + MAX77686_REG_LDO5CTRL1 ,
    + MAX77686_REG_LDO6CTRL1,
    + MAX77686_REG_LDO7CTRL1 ,
    + MAX77686_REG_LDO8CTRL1 ,
    + MAX77686_REG_LDO9CTRL1 ,
    + MAX77686_REG_LDO10CTRL1,
    + MAX77686_REG_LDO11CTRL1,
    + MAX77686_REG_LDO12CTRL1,
    + MAX77686_REG_LDO13CTRL1,
    + MAX77686_REG_LDO14CTRL1,
    + MAX77686_REG_LDO15CTRL1,
    + MAX77686_REG_LDO16CTRL1,
    + MAX77686_REG_LDO17CTRL1,
    + MAX77686_REG_LDO18CTRL1,
    + MAX77686_REG_LDO19CTRL1,
    + MAX77686_REG_LDO20CTRL1,
    + MAX77686_REG_LDO21CTRL1,
    + MAX77686_REG_LDO22CTRL1,
    + MAX77686_REG_LDO23CTRL1,
    + MAX77686_REG_LDO24CTRL1,
    + MAX77686_REG_LDO25CTRL1,
    + MAX77686_REG_LDO26CTRL1,
    + /* Reserved: 0x5A-0x5F */
    + MAX77686_REG_LDO1CTRL2 ,
    + MAX77686_REG_LDO2CTRL2 ,
    + MAX77686_REG_LDO3CTRL2 ,
    + MAX77686_REG_LDO4CTRL2 ,
    + MAX77686_REG_LDO5CTRL2 ,
    + MAX77686_REG_LDO6CTRL2,
    + MAX77686_REG_LDO7CTRL2 ,
    + MAX77686_REG_LDO8CTRL2 ,
    + MAX77686_REG_LDO9CTRL2 ,
    + MAX77686_REG_LDO10CTRL2,
    + MAX77686_REG_LDO11CTRL2,
    + MAX77686_REG_LDO12CTRL2,
    + MAX77686_REG_LDO13CTRL2,
    + MAX77686_REG_LDO14CTRL2,
    + MAX77686_REG_LDO15CTRL2,
    + MAX77686_REG_LDO16CTRL2,
    + MAX77686_REG_LDO17CTRL2,
    + MAX77686_REG_LDO18CTRL2,
    + MAX77686_REG_LDO19CTRL2,
    + MAX77686_REG_LDO20CTRL2,
    + MAX77686_REG_LDO21CTRL2,
    + MAX77686_REG_LDO22CTRL2,
    + MAX77686_REG_LDO23CTRL2,
    + MAX77686_REG_LDO24CTRL2,
    + MAX77686_REG_LDO25CTRL2,
    + MAX77686_REG_LDO26CTRL2,
    + MAX77686_REG_BBAT_CHG,
    + MAX77686_REG_32KHZ,
    +};
    +
    +static int max77686_freeze(struct device *dev)
    +{
    + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
    + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
    + int i;
    +
    + for (i = 0; i < ARRAY_SIZE(max77686_dumpaddr_pmic); i++)
    + max77686_read_reg(i2c, max77686_dumpaddr_pmic[i],
    + &max77686->reg_dump[i]);
    +
    + disable_irq(max77686->irq);
    +
    + return 0;
    +}
    +
    +static int max77686_restore(struct device *dev)
    +{
    + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
    + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
    + int i;
    +
    + enable_irq(max77686->irq);
    +
    + for (i = 0; i < ARRAY_SIZE(max77686_dumpaddr_pmic); i++)
    + max77686_write_reg(i2c, max77686_dumpaddr_pmic[i],
    + max77686->reg_dump[i]);
    +
    + return 0;
    +}
    +#endif
    +
    +const struct dev_pm_ops max77686_pm = {
    + .suspend = max77686_suspend,
    + .resume = max77686_resume,
    +#ifdef CONFIG_HIBERNATION
    + .freeze = max77686_freeze,
    + .thaw = max77686_restore,
    + .restore = max77686_restore,
    +#endif
    +};
    +
    +static struct i2c_driver max77686_i2c_driver = {
    + .driver = {
    + .name = "max77686",
    + .owner = THIS_MODULE,
    + .pm = &max77686_pm,
    + },
    + .probe = max77686_i2c_probe,
    + .remove = max77686_i2c_remove,
    + .id_table = max77686_i2c_id,
    +};
    +
    +static int __init max77686_i2c_init(void)
    +{
    + return i2c_add_driver(&max77686_i2c_driver);
    +}
    +/* init early so consumer devices can complete system boot */
    +subsys_initcall(max77686_i2c_init);
    +
    +static void __exit max77686_i2c_exit(void)
    +{
    + i2c_del_driver(&max77686_i2c_driver);
    +}
    +module_exit(max77686_i2c_exit);
    +
    +MODULE_DESCRIPTION("MAXIM 77686 multi-function core driver");
    +MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
    +MODULE_LICENSE("GPL");
    diff --git a/include/linux/mfd/max77686-private.h b/include/linux/mfd/max77686-private.h
    new file mode 100644
    index 0000000..a44a743
    --- /dev/null
    +++ b/include/linux/mfd/max77686-private.h
    @@ -0,0 +1,259 @@
    +/*
    + * max77686.h - Voltage regulator driver for the Maxim 77686
    + *
    + * Copyright (C) 2012 Samsung Electrnoics
    + * Chiwoong Byun <woong.byun@samsung.com>
    + *
    + * 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_MAX77686_PRIV_H
    +#define __LINUX_MFD_MAX77686_PRIV_H
    +
    +#include <linux/i2c.h>
    +
    +#define MAX77686_REG_INVALID (0xff)
    +
    +enum max77686_pmic_reg {
    + MAX77686_REG_DEVICE_ID = 0x00,
    + MAX77686_REG_INTSRC = 0x01,
    + MAX77686_REG_INT1 = 0x02,
    + MAX77686_REG_INT2 = 0x03,
    +
    + MAX77686_REG_INT1MSK = 0x04,
    + MAX77686_REG_INT2MSK = 0x05,
    +
    + MAX77686_REG_STATUS1 = 0x06,
    + MAX77686_REG_STATUS2 = 0x07,
    +
    + MAX77686_REG_PWRON = 0x08,
    + MAX77686_REG_ONOFF_DELAY = 0x09,
    + MAX77686_REG_MRSTB = 0x0A,
    + /* Reserved: 0x0B-0x0F */
    +
    + MAX77686_REG_BUCK1CTRL = 0x10,
    + MAX77686_REG_BUCK1OUT = 0x11,
    + MAX77686_REG_BUCK2CTRL1 = 0x12,
    + MAX77686_REG_BUCK234FREQ = 0x13,
    + MAX77686_REG_BUCK2DVS1 = 0x14,
    + MAX77686_REG_BUCK2DVS2 = 0x15,
    + MAX77686_REG_BUCK2DVS3 = 0x16,
    + MAX77686_REG_BUCK2DVS4 = 0x17,
    + MAX77686_REG_BUCK2DVS5 = 0x18,
    + MAX77686_REG_BUCK2DVS6 = 0x19,
    + MAX77686_REG_BUCK2DVS7 = 0x1A,
    + MAX77686_REG_BUCK2DVS8 = 0x1B,
    + MAX77686_REG_BUCK3CTRL1 = 0x1C,
    + /* Reserved: 0x1D */
    + MAX77686_REG_BUCK3DVS1 = 0x1E,
    + MAX77686_REG_BUCK3DVS2 = 0x1F,
    + MAX77686_REG_BUCK3DVS3 = 0x20,
    + MAX77686_REG_BUCK3DVS4 = 0x21,
    + MAX77686_REG_BUCK3DVS5 = 0x22,
    + MAX77686_REG_BUCK3DVS6 = 0x23,
    + MAX77686_REG_BUCK3DVS7 = 0x24,
    + MAX77686_REG_BUCK3DVS8 = 0x25,
    + MAX77686_REG_BUCK4CTRL1 = 0x26,
    + /* Reserved: 0x27 */
    + MAX77686_REG_BUCK4DVS1 = 0x28,
    + MAX77686_REG_BUCK4DVS2 = 0x29,
    + MAX77686_REG_BUCK4DVS3 = 0x2A,
    + MAX77686_REG_BUCK4DVS4 = 0x2B,
    + MAX77686_REG_BUCK4DVS5 = 0x2C,
    + MAX77686_REG_BUCK4DVS6 = 0x2D,
    + MAX77686_REG_BUCK4DVS7 = 0x2E,
    + MAX77686_REG_BUCK4DVS8 = 0x2F,
    + MAX77686_REG_BUCK5CTRL = 0x30,
    + MAX77686_REG_BUCK5OUT = 0x31,
    + MAX77686_REG_BUCK6CTRL = 0x32,
    + MAX77686_REG_BUCK6OUT = 0x33,
    + MAX77686_REG_BUCK7CTRL = 0x34,
    + MAX77686_REG_BUCK7OUT = 0x35,
    + MAX77686_REG_BUCK8CTRL = 0x36,
    + MAX77686_REG_BUCK8OUT = 0x37,
    + MAX77686_REG_BUCK9CTRL = 0x38,
    + MAX77686_REG_BUCK9OUT = 0x39,
    + /* Reserved: 0x3A-0x3F */
    +
    + MAX77686_REG_LDO1CTRL1 = 0x40,
    + MAX77686_REG_LDO2CTRL1 = 0x41,
    + MAX77686_REG_LDO3CTRL1 = 0x42,
    + MAX77686_REG_LDO4CTRL1 = 0x43,
    + MAX77686_REG_LDO5CTRL1 = 0x44,
    + MAX77686_REG_LDO6CTRL1 = 0x45,
    + MAX77686_REG_LDO7CTRL1 = 0x46,
    + MAX77686_REG_LDO8CTRL1 = 0x47,
    + MAX77686_REG_LDO9CTRL1 = 0x48,
    + MAX77686_REG_LDO10CTRL1 = 0x49,
    + MAX77686_REG_LDO11CTRL1 = 0x4A,
    + MAX77686_REG_LDO12CTRL1 = 0x4B,
    + MAX77686_REG_LDO13CTRL1 = 0x4C,
    + MAX77686_REG_LDO14CTRL1 = 0x4D,
    + MAX77686_REG_LDO15CTRL1 = 0x4E,
    + MAX77686_REG_LDO16CTRL1 = 0x4F,
    + MAX77686_REG_LDO17CTRL1 = 0x50,
    + MAX77686_REG_LDO18CTRL1 = 0x51,
    + MAX77686_REG_LDO19CTRL1 = 0x52,
    + MAX77686_REG_LDO20CTRL1 = 0x53,
    + MAX77686_REG_LDO21CTRL1 = 0x54,
    + MAX77686_REG_LDO22CTRL1 = 0x55,
    + MAX77686_REG_LDO23CTRL1 = 0x56,
    + MAX77686_REG_LDO24CTRL1 = 0x57,
    + MAX77686_REG_LDO25CTRL1 = 0x58,
    + MAX77686_REG_LDO26CTRL1 = 0x59,
    + /* Reserved: 0x5A-0x5F */
    + MAX77686_REG_LDO1CTRL2 = 0x60,
    + MAX77686_REG_LDO2CTRL2 = 0x61,
    + MAX77686_REG_LDO3CTRL2 = 0x62,
    + MAX77686_REG_LDO4CTRL2 = 0x63,
    + MAX77686_REG_LDO5CTRL2 = 0x64,
    + MAX77686_REG_LDO6CTRL2 = 0x65,
    + MAX77686_REG_LDO7CTRL2 = 0x66,
    + MAX77686_REG_LDO8CTRL2 = 0x67,
    + MAX77686_REG_LDO9CTRL2 = 0x68,
    + MAX77686_REG_LDO10CTRL2 = 0x69,
    + MAX77686_REG_LDO11CTRL2 = 0x6A,
    + MAX77686_REG_LDO12CTRL2 = 0x6B,
    + MAX77686_REG_LDO13CTRL2 = 0x6C,
    + MAX77686_REG_LDO14CTRL2 = 0x6D,
    + MAX77686_REG_LDO15CTRL2 = 0x6E,
    + MAX77686_REG_LDO16CTRL2 = 0x6F,
    + MAX77686_REG_LDO17CTRL2 = 0x70,
    + MAX77686_REG_LDO18CTRL2 = 0x71,
    + MAX77686_REG_LDO19CTRL2 = 0x72,
    + MAX77686_REG_LDO20CTRL2 = 0x73,
    + MAX77686_REG_LDO21CTRL2 = 0x74,
    + MAX77686_REG_LDO22CTRL2 = 0x75,
    + MAX77686_REG_LDO23CTRL2 = 0x76,
    + MAX77686_REG_LDO24CTRL2 = 0x77,
    + MAX77686_REG_LDO25CTRL2 = 0x78,
    + MAX77686_REG_LDO26CTRL2 = 0x79,
    + /* Reserved: 0x7A-0x7D */
    +
    + MAX77686_REG_BBAT_CHG = 0x7E,
    + MAX77686_REG_32KHZ = 0x7F,
    +
    + MAX77686_REG_PMIC_END = 0x80,
    +};
    +
    +enum max77686_rtc_reg {
    + MAX77686_RTC_INT = 0x00,
    + MAX77686_RTC_INTM = 0x01,
    + MAX77686_RTC_CONTROLM = 0x02,
    + MAX77686_RTC_CONTROL = 0x03,
    + MAX77686_RTC_UPDATE0 = 0x04,
    + /* Reserved: 0x5 */
    + MAX77686_WTSR_SMPL_CNTL = 0x06,
    + MAX77686_RTC_SEC = 0x07,
    + MAX77686_RTC_MIN = 0x08,
    + MAX77686_RTC_HOUR = 0x09,
    + MAX77686_RTC_WEEKDAY = 0x0A,
    + MAX77686_RTC_MONTH = 0x0B,
    + MAX77686_RTC_YEAR = 0x0C,
    + MAX77686_RTC_DATE = 0x0D,
    + MAX77686_ALARM1_SEC = 0x0E,
    + MAX77686_ALARM1_MIN = 0x0F,
    + MAX77686_ALARM1_HOUR = 0x10,
    + MAX77686_ALARM1_WEEKDAY = 0x11,
    + MAX77686_ALARM1_MONTH = 0x12,
    + MAX77686_ALARM1_YEAR = 0x13,
    + MAX77686_ALARM1_DATE = 0x14,
    + MAX77686_ALARM2_SEC = 0x15,
    + MAX77686_ALARM2_MIN = 0x16,
    + MAX77686_ALARM2_HOUR = 0x17,
    + MAX77686_ALARM2_WEEKDAY = 0x18,
    + MAX77686_ALARM2_MONTH = 0x19,
    + MAX77686_ALARM2_YEAR = 0x1A,
    + MAX77686_ALARM2_DATE = 0x1B,
    +};
    +
    +#define MAX77686_IRQSRC_PMIC (0)
    +#define MAX77686_IRQSRC_RTC (1 << 0)
    +
    +#define MAX77686_REG_RAMP_RATE_100MV (0x3<<6)
    +#define MAX77686_REG_RAMP_RATE_55MV (0x2<<6)
    +#define MAX77686_REG_RAMP_RATE_27MV (0x1<<6)
    +#define MAX77686_REG_RAMP_RATE_13MV (0x0<<6)
    +
    +enum max77686_irq_source {
    + PMIC_INT1 = 0,
    + PMIC_INT2,
    + RTC_INT,
    +
    + MAX77686_IRQ_GROUP_NR,
    +};
    +
    +enum max77686_irq {
    + MAX77686_PMICIRQ_PWRONF,
    + MAX77686_PMICIRQ_PWRONR,
    + MAX77686_PMICIRQ_JIGONBF,
    + MAX77686_PMICIRQ_JIGONBR,
    + MAX77686_PMICIRQ_ACOKBF,
    + MAX77686_PMICIRQ_ACOKBR,
    + MAX77686_PMICIRQ_ONKEY1S,
    + MAX77686_PMICIRQ_MRSTB,
    +
    + MAX77686_PMICIRQ_140C,
    + MAX77686_PMICIRQ_120C,
    +
    + MAX77686_RTCIRQ_RTC60S,
    + MAX77686_RTCIRQ_RTCA1,
    + MAX77686_RTCIRQ_RTCA2,
    + MAX77686_RTCIRQ_SMPL,
    + MAX77686_RTCIRQ_RTC1S,
    + MAX77686_RTCIRQ_WTSR,
    +
    + MAX77686_IRQ_NR,
    +};
    +
    +struct max77686_dev {
    + struct device *dev;
    + struct i2c_client *i2c; /* 0xcc / PMIC, Battery Control, and FLASH */
    + struct i2c_client *rtc; /* slave addr 0x0c */
    + struct mutex iolock;
    +
    + int type;
    +
    + int irq;
    + int irq_gpio;
    + int irq_base;
    + bool wakeup;
    + struct mutex irqlock;
    + int irq_masks_cur[MAX77686_IRQ_GROUP_NR];
    + int irq_masks_cache[MAX77686_IRQ_GROUP_NR];
    + int wtsr_smpl;
    +
    +#ifdef CONFIG_HIBERNATION
    + u8 reg_dump[MAX77686_REG_PMIC_END];
    +#endif
    +};
    +
    +enum max77686_types {
    + TYPE_MAX77686,
    +};
    +
    +extern int max77686_irq_init(struct max77686_dev *max77686);
    +extern void max77686_irq_exit(struct max77686_dev *max77686);
    +extern int max77686_irq_resume(struct max77686_dev *max77686);
    +
    +extern int max77686_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest);
    +extern int max77686_bulk_read(struct i2c_client *i2c, u8 reg, int count,
    + u8 *buf);
    +extern int max77686_write_reg(struct i2c_client *i2c, u8 reg, u8 value);
    +extern int max77686_bulk_write(struct i2c_client *i2c, u8 reg, int count,
    + u8 *buf);
    +extern int max77686_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask);
    +
    +#endif /* __LINUX_MFD_MAX77686_PRIV_H */
    diff --git a/include/linux/mfd/max77686.h b/include/linux/mfd/max77686.h
    new file mode 100644
    index 0000000..9dc81f0
    --- /dev/null
    +++ b/include/linux/mfd/max77686.h
    @@ -0,0 +1,137 @@
    +/*
    + * max77686.h - Driver for the Maxim 77686
    + *
    + * Copyright (C) 2012 Samsung Electrnoics
    + * Chiwoong Byun <woong.byun@samsung.com>
    + *
    + * 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
    + *
    + * MAX77686 has PMIC, RTC devices.
    + * The devices share the same I2C bus and included in
    + * this mfd driver.
    + */
    +
    +#ifndef __LINUX_MFD_MAX77686_H
    +#define __LINUX_MFD_MAX77686_H
    +
    +#include <linux/regulator/consumer.h>
    +
    +#define MAX77686_SMPL_ENABLE (0x1)
    +#define MAX77686_WTSR_ENABLE (0x2)
    +
    +/* MAX77686 regulator IDs */
    +enum max77686_regulators {
    + MAX77686_LDO1 = 0,
    + MAX77686_LDO2,
    + MAX77686_LDO3,
    + MAX77686_LDO4,
    + MAX77686_LDO5,
    + MAX77686_LDO6,
    + MAX77686_LDO7,
    + MAX77686_LDO8,
    + MAX77686_LDO9,
    + MAX77686_LDO10,
    + MAX77686_LDO11,
    + MAX77686_LDO12,
    + MAX77686_LDO13,
    + MAX77686_LDO14,
    + MAX77686_LDO15,
    + MAX77686_LDO16,
    + MAX77686_LDO17,
    + MAX77686_LDO18,
    + MAX77686_LDO19,
    + MAX77686_LDO20,
    + MAX77686_LDO21,
    + MAX77686_LDO22,
    + MAX77686_LDO23,
    + MAX77686_LDO24,
    + MAX77686_LDO25,
    + MAX77686_LDO26,
    + MAX77686_BUCK1,
    + MAX77686_BUCK2,
    + MAX77686_BUCK3,
    + MAX77686_BUCK4,
    + MAX77686_BUCK5,
    + MAX77686_BUCK6,
    + MAX77686_BUCK7,
    + MAX77686_BUCK8,
    + MAX77686_BUCK9,
    + MAX77686_EN32KHZ_AP,
    + MAX77686_EN32KHZ_CP,
    + MAX77686_P32KH,
    +
    + MAX77686_REG_MAX,
    +};
    +
    +struct max77686_regulator_data {
    + int id;
    + struct regulator_init_data *initdata;
    +};
    +
    +enum max77686_opmode {
    + MAX77686_OPMODE_NORMAL,
    + MAX77686_OPMODE_LP,
    + MAX77686_OPMODE_STANDBY,
    +};
    +
    +enum max77686_ramp_rate {
    + MAX77686_RAMP_RATE_100MV,
    + MAX77686_RAMP_RATE_13MV,
    + MAX77686_RAMP_RATE_27MV,
    + MAX77686_RAMP_RATE_55MV,
    +};
    +
    +struct max77686_opmode_data {
    + int id;
    + int mode;
    +};
    +
    +struct max77686_buck234_gpio_data {
    + int gpio;
    + int data;
    +};
    +
    +struct max77686_platform_data {
    + /* IRQ */
    + int irq_gpio;
    + int irq_base;
    + int ono;
    + int wakeup;
    +
    + /* ---- PMIC ---- */
    + struct max77686_regulator_data *regulators;
    + int num_regulators;
    + int has_full_constraints;
    +
    + struct max77686_opmode_data *opmode_data;
    + int ramp_rate;
    + int wtsr_smpl;
    +
    + /*
    + * GPIO-DVS feature is not enabled with the current version of
    + * MAX77686 driver. Buck2/3/4_voltages[0] is used as the default
    + * voltage at probe. DVS/SELB gpios are set as OUTPUT-LOW.
    + */
    + struct max77686_buck234_gpio_data buck234_gpio_dvs[3];
    + /* GPIO of [0]DVS1, [1]DVS2, [2]DVS3 */
    + int buck234_gpio_selb[3]; /* [0]SELB2, [1]SELB3, [2]SELB4 */
    + unsigned int buck2_voltage[8]; /* buckx_voltage in uV */
    + unsigned int buck3_voltage[8];
    + unsigned int buck4_voltage[8];
    +};
    +
    +#endif /* __LINUX_MFD_MAX77686_H */
    --
    1.7.4.1


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