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    Subject[PATCH v5] regulator: Add S5M8767A regulator driver
    Date
    S5M8767A is a cost-effective PMIC which is designed for mobile applications.
    It includes high efficient 9 Buck converters, 28 LDOs.
    Especially, S5M8767A is optimized for Multi-core SOCs.
    And during DVFS operation, S5M8767A output stable voltage.
    This patch implement regulator driver for S5M8767A.

    Signed-off-by: Sangbeom Kim <sbkim73@samsung.com>
    ---
    Changes since v4:
    As Mark Brown comments
    - Removed set_suspend_enable, set_suspend_disable mapping functions.
    ---
    drivers/regulator/s5m8767.c | 834 +++++++++++++++++++++++++++++++++++++++++++
    1 files changed, 834 insertions(+), 0 deletions(-)
    create mode 100644 drivers/regulator/s5m8767.c

    diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
    new file mode 100644
    index 0000000..53d9617
    --- /dev/null
    +++ b/drivers/regulator/s5m8767.c
    @@ -0,0 +1,834 @@
    +/*
    + * s5m8767.c
    + *
    + * Copyright (c) 2011 Samsung Electronics Co., Ltd
    + * http://www.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.
    + *
    + */
    +
    +#include <linux/bug.h>
    +#include <linux/delay.h>
    +#include <linux/err.h>
    +#include <linux/gpio.h>
    +#include <linux/slab.h>
    +#include <linux/module.h>
    +#include <linux/platform_device.h>
    +#include <linux/regulator/driver.h>
    +#include <linux/regulator/machine.h>
    +#include <linux/mfd/s5m87xx/s5m-core.h>
    +#include <linux/mfd/s5m87xx/s5m-pmic.h>
    +
    +struct s5m8767_info {
    + struct device *dev;
    + struct s5m87xx_dev *iodev;
    + int num_regulators;
    + struct regulator_dev **rdev;
    +
    + int ramp_delay;
    + bool buck2_ramp;
    + bool buck3_ramp;
    + bool buck4_ramp;
    +
    + bool buck2_gpiodvs;
    + bool buck3_gpiodvs;
    + bool buck4_gpiodvs;
    + u8 buck2_vol[8];
    + u8 buck3_vol[8];
    + u8 buck4_vol[8];
    + int buck_gpios[3];
    + int buck_gpioindex;
    +};
    +
    +struct s5m_voltage_desc {
    + int max;
    + int min;
    + int step;
    +};
    +
    +static const struct s5m_voltage_desc buck_voltage_val1 = {
    + .max = 2225000,
    + .min = 650000,
    + .step = 6250,
    +};
    +
    +static const struct s5m_voltage_desc buck_voltage_val2 = {
    + .max = 1600000,
    + .min = 600000,
    + .step = 6250,
    +};
    +
    +static const struct s5m_voltage_desc buck_voltage_val3 = {
    + .max = 3000000,
    + .min = 750000,
    + .step = 12500,
    +};
    +
    +static const struct s5m_voltage_desc ldo_voltage_val1 = {
    + .max = 3950000,
    + .min = 800000,
    + .step = 50000,
    +};
    +
    +static const struct s5m_voltage_desc ldo_voltage_val2 = {
    + .max = 2375000,
    + .min = 800000,
    + .step = 25000,
    +};
    +
    +static const struct s5m_voltage_desc *reg_voltage_map[] = {
    + [S5M8767_LDO1] = &ldo_voltage_val2,
    + [S5M8767_LDO2] = &ldo_voltage_val2,
    + [S5M8767_LDO3] = &ldo_voltage_val1,
    + [S5M8767_LDO4] = &ldo_voltage_val1,
    + [S5M8767_LDO5] = &ldo_voltage_val1,
    + [S5M8767_LDO6] = &ldo_voltage_val2,
    + [S5M8767_LDO7] = &ldo_voltage_val2,
    + [S5M8767_LDO8] = &ldo_voltage_val2,
    + [S5M8767_LDO9] = &ldo_voltage_val1,
    + [S5M8767_LDO10] = &ldo_voltage_val1,
    + [S5M8767_LDO11] = &ldo_voltage_val1,
    + [S5M8767_LDO12] = &ldo_voltage_val1,
    + [S5M8767_LDO13] = &ldo_voltage_val1,
    + [S5M8767_LDO14] = &ldo_voltage_val1,
    + [S5M8767_LDO15] = &ldo_voltage_val2,
    + [S5M8767_LDO16] = &ldo_voltage_val1,
    + [S5M8767_LDO17] = &ldo_voltage_val1,
    + [S5M8767_LDO18] = &ldo_voltage_val1,
    + [S5M8767_LDO19] = &ldo_voltage_val1,
    + [S5M8767_LDO20] = &ldo_voltage_val1,
    + [S5M8767_LDO21] = &ldo_voltage_val1,
    + [S5M8767_LDO22] = &ldo_voltage_val1,
    + [S5M8767_LDO23] = &ldo_voltage_val1,
    + [S5M8767_LDO24] = &ldo_voltage_val1,
    + [S5M8767_LDO25] = &ldo_voltage_val1,
    + [S5M8767_LDO26] = &ldo_voltage_val1,
    + [S5M8767_LDO27] = &ldo_voltage_val1,
    + [S5M8767_LDO28] = &ldo_voltage_val1,
    + [S5M8767_BUCK1] = &buck_voltage_val1,
    + [S5M8767_BUCK2] = &buck_voltage_val2,
    + [S5M8767_BUCK3] = &buck_voltage_val2,
    + [S5M8767_BUCK4] = &buck_voltage_val2,
    + [S5M8767_BUCK5] = &buck_voltage_val1,
    + [S5M8767_BUCK6] = &buck_voltage_val1,
    + [S5M8767_BUCK7] = NULL,
    + [S5M8767_BUCK8] = NULL,
    + [S5M8767_BUCK9] = &buck_voltage_val3,
    +};
    +
    +static inline int s5m8767_get_reg_id(struct regulator_dev *rdev)
    +{
    + return rdev_get_id(rdev);
    +}
    +
    +static int s5m8767_list_voltage(struct regulator_dev *rdev,
    + unsigned int selector)
    +{
    + const struct s5m_voltage_desc *desc;
    + int reg_id = s5m8767_get_reg_id(rdev);
    + int val;
    +
    + if (reg_id >= ARRAY_SIZE(reg_voltage_map) || reg_id < 0)
    + return -EINVAL;
    +
    + desc = reg_voltage_map[reg_id];
    + if (desc == NULL)
    + return -EINVAL;
    +
    + val = desc->min + desc->step * selector;
    + if (val > desc->max)
    + return -EINVAL;
    +
    + return val;
    +}
    +
    +static int s5m8767_get_register(struct regulator_dev *rdev, int *reg)
    +{
    + int reg_id = s5m8767_get_reg_id(rdev);
    +
    + switch (reg_id) {
    + case S5M8767_LDO1 ... S5M8767_LDO2:
    + *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
    + break;
    + case S5M8767_LDO3 ... S5M8767_LDO28:
    + *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
    + break;
    + case S5M8767_BUCK1:
    + *reg = S5M8767_REG_BUCK1CTRL1;
    + break;
    + case S5M8767_BUCK2 ... S5M8767_BUCK4:
    + *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9;
    + break;
    + case S5M8767_BUCK5:
    + *reg = S5M8767_REG_BUCK5CTRL1;
    + break;
    + case S5M8767_BUCK6 ... S5M8767_BUCK9:
    + *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2;
    + break;
    + default:
    + return -EINVAL;
    + }
    +
    + return 0;
    +}
    +
    +static int s5m8767_reg_is_enabled(struct regulator_dev *rdev)
    +{
    + struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
    + int ret, reg;
    + int mask = 0xc0, pattern = 0xc0;
    + u8 val;
    +
    + ret = s5m8767_get_register(rdev, &reg);
    + if (ret == -EINVAL)
    + return 1;
    + else if (ret)
    + return ret;
    +
    + ret = s5m_reg_read(s5m8767->iodev, reg, &val);
    + if (ret)
    + return ret;
    +
    + return (val & mask) == pattern;
    +}
    +
    +static int s5m8767_reg_enable(struct regulator_dev *rdev)
    +{
    + struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
    + int ret, reg;
    + int mask = 0xc0, pattern = 0xc0;
    +
    + ret = s5m8767_get_register(rdev, &reg);
    + if (ret)
    + return ret;
    +
    + return s5m_reg_update(s5m8767->iodev, reg, pattern, mask);
    +}
    +
    +static int s5m8767_reg_disable(struct regulator_dev *rdev)
    +{
    + struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
    + int ret, reg;
    + int mask = 0xc0, pattern = 0xc0;
    +
    + ret = s5m8767_get_register(rdev, &reg);
    + if (ret)
    + return ret;
    +
    + return s5m_reg_update(s5m8767->iodev, reg, ~pattern, mask);
    +}
    +
    +static int s5m8767_get_voltage_register(struct regulator_dev *rdev, int *_reg)
    +{
    + int reg_id = s5m8767_get_reg_id(rdev);
    + int reg;
    +
    + switch (reg_id) {
    + case S5M8767_LDO1 ... S5M8767_LDO2:
    + reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
    + break;
    + case S5M8767_LDO3 ... S5M8767_LDO28:
    + reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
    + break;
    + case S5M8767_BUCK1:
    + reg = S5M8767_REG_BUCK1CTRL2;
    + break;
    + case S5M8767_BUCK2:
    + reg = S5M8767_REG_BUCK2DVS1;
    + break;
    + case S5M8767_BUCK3:
    + reg = S5M8767_REG_BUCK3DVS1;
    + break;
    + case S5M8767_BUCK4:
    + reg = S5M8767_REG_BUCK4DVS1;
    + break;
    + case S5M8767_BUCK5:
    + reg = S5M8767_REG_BUCK5CTRL2;
    + break;
    + case S5M8767_BUCK6 ... S5M8767_BUCK9:
    + reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
    + break;
    + default:
    + return -EINVAL;
    + }
    +
    + *_reg = reg;
    +
    + return 0;
    +}
    +
    +static int s5m8767_get_voltage_sel(struct regulator_dev *rdev)
    +{
    + struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
    + int reg, mask = 0xff, ret;
    + int reg_id = s5m8767_get_reg_id(rdev);
    + u8 val;
    +
    + ret = s5m8767_get_voltage_register(rdev, &reg);
    + if (ret)
    + return ret;
    +
    + switch (reg_id) {
    + case S5M8767_LDO1 ... S5M8767_LDO28:
    + mask = 0x3f;
    + break;
    + case S5M8767_BUCK2:
    + if (s5m8767->buck2_gpiodvs)
    + reg += s5m8767->buck_gpioindex;
    + break;
    + case S5M8767_BUCK3:
    + if (s5m8767->buck3_gpiodvs)
    + reg += s5m8767->buck_gpioindex;
    + break;
    + case S5M8767_BUCK4:
    + if (s5m8767->buck4_gpiodvs)
    + reg += s5m8767->buck_gpioindex;
    + break;
    + }
    +
    + ret = s5m_reg_read(s5m8767->iodev, reg, &val);
    + if (ret)
    + return ret;
    +
    + val &= mask;
    +
    + return val;
    +}
    +
    +static inline int s5m8767_convert_voltage(
    + const struct s5m_voltage_desc *desc,
    + int min_vol, int max_vol)
    +{
    + int out_vol = 0;
    +
    + if (desc == NULL)
    + return -EINVAL;
    +
    + if (max_vol < desc->min || min_vol > desc->max)
    + return -EINVAL;
    +
    + out_vol = (min_vol - desc->min) / desc->step;
    +
    + if (desc->min + desc->step * out_vol > max_vol)
    + return -EINVAL;
    +
    + return out_vol;
    +}
    +
    +static int s5m8767_set_voltage(struct regulator_dev *rdev,
    + int min_uV, int max_uV, unsigned *selector)
    +{
    + struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
    + int min_vol = min_uV, max_vol = max_uV;
    + const struct s5m_voltage_desc *desc;
    + int reg_id = s5m8767_get_reg_id(rdev);
    + int reg, mask, ret;
    + int i;
    + u8 val;
    +
    + switch (reg_id) {
    + case S5M8767_LDO1 ... S5M8767_LDO28:
    + mask = 0x3f;
    + break;
    + case S5M8767_BUCK1 ... S5M8767_BUCK6:
    + mask = 0xff;
    + break;
    + case S5M8767_BUCK7 ... S5M8767_BUCK8:
    + return -EINVAL;
    + case S5M8767_BUCK9:
    + mask = 0xff;
    + break;
    + default:
    + return -EINVAL;
    + }
    +
    + desc = reg_voltage_map[reg_id];
    +
    + i = s5m8767_convert_voltage(desc, min_vol, max_vol);
    + if (i < 0)
    + return i;
    +
    + ret = s5m8767_get_voltage_register(rdev, &reg);
    + if (ret)
    + return ret;
    +
    + s5m_reg_read(s5m8767->iodev, reg, &val);
    + val = val & mask;
    +
    + ret = s5m_reg_write(s5m8767->iodev, reg, val);
    + *selector = i;
    +
    + return ret;
    +}
    +
    +static inline void s5m8767_set_high(struct s5m8767_info *s5m8767)
    +{
    + int temp_index = s5m8767->buck_gpioindex;
    +
    + gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
    + gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
    + gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
    +}
    +
    +static inline void s5m8767_set_low(struct s5m8767_info *s5m8767)
    +{
    + int temp_index = s5m8767->buck_gpioindex;
    +
    + gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
    + gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
    + gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
    +}
    +
    +static int s5m8767_set_voltage_buck(struct regulator_dev *rdev,
    + int min_uV, int max_uV, unsigned *selector)
    +{
    + struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
    + int reg_id = s5m8767_get_reg_id(rdev);
    + const struct s5m_voltage_desc *desc;
    + int new_val, old_val, i = 0;
    + int min_vol = min_uV, max_vol = max_uV;
    +
    + if (reg_id < S5M8767_BUCK1 || reg_id > S5M8767_BUCK6)
    + return -EINVAL;
    +
    + switch (reg_id) {
    + case S5M8767_BUCK1:
    + return s5m8767_set_voltage(rdev, min_uV, max_uV, selector);
    + case S5M8767_BUCK2 ... S5M8767_BUCK4:
    + break;
    + case S5M8767_BUCK5 ... S5M8767_BUCK6:
    + return s5m8767_set_voltage(rdev, min_uV, max_uV, selector);
    + case S5M8767_BUCK9:
    + return s5m8767_set_voltage(rdev, min_uV, max_uV, selector);
    + }
    +
    + desc = reg_voltage_map[reg_id];
    + new_val = s5m8767_convert_voltage(desc, min_vol, max_vol);
    + if (new_val < 0)
    + return new_val;
    +
    + switch (reg_id) {
    + case S5M8767_BUCK2:
    + if (s5m8767->buck2_gpiodvs) {
    + while (s5m8767->buck2_vol[i] != new_val)
    + i++;
    + } else
    + return s5m8767_set_voltage(rdev, min_uV,
    + max_uV, selector);
    + break;
    + case S5M8767_BUCK3:
    + if (s5m8767->buck3_gpiodvs) {
    + while (s5m8767->buck3_vol[i] != new_val)
    + i++;
    + } else
    + return s5m8767_set_voltage(rdev, min_uV,
    + max_uV, selector);
    + break;
    + case S5M8767_BUCK4:
    + if (s5m8767->buck3_gpiodvs) {
    + while (s5m8767->buck4_vol[i] != new_val)
    + i++;
    + } else
    + return s5m8767_set_voltage(rdev, min_uV,
    + max_uV, selector);
    + break;
    + }
    +
    + old_val = s5m8767->buck_gpioindex;
    + s5m8767->buck_gpioindex = i;
    +
    + if (i > old_val)
    + s5m8767_set_high(s5m8767);
    + else
    + s5m8767_set_low(s5m8767);
    +
    + *selector = new_val;
    + return 0;
    +}
    +
    +static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
    + unsigned int old_sel,
    + unsigned int new_sel)
    +{
    + struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
    + const struct s5m_voltage_desc *desc;
    + int reg_id = s5m8767_get_reg_id(rdev);
    + int mask;
    + int new_val, old_val;
    +
    + switch (reg_id) {
    + case S5M8767_LDO1 ... S5M8767_LDO28:
    + mask = 0x3f;
    + break;
    + case S5M8767_BUCK1 ... S5M8767_BUCK6:
    + mask = 0xff;
    + break;
    + case S5M8767_BUCK7 ... S5M8767_BUCK8:
    + return -EINVAL;
    + case S5M8767_BUCK9:
    + mask = 0xff;
    + break;
    + default:
    + return -EINVAL;
    + }
    + desc = reg_voltage_map[reg_id];
    +
    + new_val = s5m8767_convert_voltage(desc, new_sel, new_sel);
    + if (new_val < 0)
    + return new_val;
    +
    + old_val = s5m8767_convert_voltage(desc, old_sel, old_sel);
    + if (old_val < 0)
    + return old_val;
    +
    + if (old_sel < new_sel)
    + return DIV_ROUND_UP(desc->step * (new_val - old_val),
    + s5m8767->ramp_delay);
    + else
    + return 0;
    +}
    +
    +static struct regulator_ops s5m8767_ldo_ops = {
    + .list_voltage = s5m8767_list_voltage,
    + .is_enabled = s5m8767_reg_is_enabled,
    + .enable = s5m8767_reg_enable,
    + .disable = s5m8767_reg_disable,
    + .get_voltage_sel = s5m8767_get_voltage_sel,
    + .set_voltage = s5m8767_set_voltage,
    + .set_voltage_time_sel = s5m8767_set_voltage_time_sel,
    +};
    +
    +static struct regulator_ops s5m8767_buck_ops = {
    + .list_voltage = s5m8767_list_voltage,
    + .is_enabled = s5m8767_reg_is_enabled,
    + .enable = s5m8767_reg_enable,
    + .disable = s5m8767_reg_disable,
    + .get_voltage_sel = s5m8767_get_voltage_sel,
    + .set_voltage = s5m8767_set_voltage_buck,
    + .set_voltage_time_sel = s5m8767_set_voltage_time_sel,
    +};
    +
    +#define regulator_desc_ldo(num) { \
    + .name = "LDO"#num, \
    + .id = S5M8767_LDO##num, \
    + .ops = &s5m8767_ldo_ops, \
    + .type = REGULATOR_VOLTAGE, \
    + .owner = THIS_MODULE, \
    +}
    +#define regulator_desc_buck(num) { \
    + .name = "BUCK"#num, \
    + .id = S5M8767_BUCK##num, \
    + .ops = &s5m8767_buck_ops, \
    + .type = REGULATOR_VOLTAGE, \
    + .owner = THIS_MODULE, \
    +}
    +
    +static struct regulator_desc regulators[] = {
    + regulator_desc_ldo(1),
    + regulator_desc_ldo(2),
    + regulator_desc_ldo(3),
    + regulator_desc_ldo(4),
    + regulator_desc_ldo(5),
    + regulator_desc_ldo(6),
    + regulator_desc_ldo(7),
    + regulator_desc_ldo(8),
    + regulator_desc_ldo(9),
    + regulator_desc_ldo(10),
    + regulator_desc_ldo(11),
    + regulator_desc_ldo(12),
    + regulator_desc_ldo(13),
    + regulator_desc_ldo(14),
    + regulator_desc_ldo(15),
    + regulator_desc_ldo(16),
    + regulator_desc_ldo(17),
    + regulator_desc_ldo(18),
    + regulator_desc_ldo(19),
    + regulator_desc_ldo(20),
    + regulator_desc_ldo(21),
    + regulator_desc_ldo(22),
    + regulator_desc_ldo(23),
    + regulator_desc_ldo(24),
    + regulator_desc_ldo(25),
    + regulator_desc_ldo(26),
    + regulator_desc_ldo(27),
    + regulator_desc_ldo(28),
    + regulator_desc_buck(1),
    + regulator_desc_buck(2),
    + regulator_desc_buck(3),
    + regulator_desc_buck(4),
    + regulator_desc_buck(5),
    + regulator_desc_buck(6),
    + regulator_desc_buck(7),
    + regulator_desc_buck(8),
    + regulator_desc_buck(9),
    +};
    +
    +static __devinit int s5m8767_pmic_probe(struct platform_device *pdev)
    +{
    + struct s5m87xx_dev *iodev = dev_get_drvdata(pdev->dev.parent);
    + struct s5m_platform_data *pdata = dev_get_platdata(iodev->dev);
    + struct regulator_dev **rdev;
    + struct s5m8767_info *s5m8767;
    + struct i2c_client *i2c;
    + int i, ret, size, reg;
    +
    + if (!pdata) {
    + dev_err(pdev->dev.parent, "Platform data not supplied\n");
    + return -ENODEV;
    + }
    +
    + s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
    + GFP_KERNEL);
    + if (!s5m8767)
    + return -ENOMEM;
    +
    + size = sizeof(struct regulator_dev *) * (S5M8767_REG_MAX - 2);
    + s5m8767->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
    + if (!s5m8767->rdev)
    + return -ENOMEM;
    +
    + rdev = s5m8767->rdev;
    + s5m8767->dev = &pdev->dev;
    + s5m8767->iodev = iodev;
    + s5m8767->num_regulators = S5M8767_REG_MAX - 2;
    + platform_set_drvdata(pdev, s5m8767);
    + i2c = s5m8767->iodev->i2c;
    +
    + s5m8767->buck_gpioindex = pdata->buck_default_idx;
    + s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
    + s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
    + s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
    + s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
    + s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
    + s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
    + s5m8767->ramp_delay = pdata->buck_ramp_delay;
    + s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
    + s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
    + s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
    +
    + for (i = 0; i < 8; i++) {
    + if (s5m8767->buck2_gpiodvs) {
    + s5m8767->buck2_vol[i] =
    + s5m8767_convert_voltage(
    + &buck_voltage_val2,
    + pdata->buck2_voltage[i],
    + pdata->buck2_voltage[i] +
    + buck_voltage_val2.step);
    + }
    +
    + if (s5m8767->buck3_gpiodvs) {
    + s5m8767->buck3_vol[i] =
    + s5m8767_convert_voltage(
    + &buck_voltage_val2,
    + pdata->buck3_voltage[i],
    + pdata->buck3_voltage[i] +
    + buck_voltage_val2.step);
    + }
    +
    + if (s5m8767->buck4_gpiodvs) {
    + s5m8767->buck4_vol[i] =
    + s5m8767_convert_voltage(
    + &buck_voltage_val2,
    + pdata->buck4_voltage[i],
    + pdata->buck4_voltage[i] +
    + buck_voltage_val2.step);
    + }
    + }
    +
    + if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
    + pdata->buck4_gpiodvs) {
    + if (gpio_is_valid(pdata->buck_gpios[0]) &&
    + gpio_is_valid(pdata->buck_gpios[1]) &&
    + gpio_is_valid(pdata->buck_gpios[2])) {
    + ret = gpio_request(pdata->buck_gpios[0],
    + "S5M8767 SET1");
    + if (ret == -EBUSY)
    + dev_warn(&pdev->dev, "Duplicated gpio request for SET1\n");
    +
    + ret = gpio_request(pdata->buck_gpios[1],
    + "S5M8767 SET2");
    + if (ret == -EBUSY)
    + dev_warn(&pdev->dev, "Duplicated gpio request for SET2\n");
    +
    + ret = gpio_request(pdata->buck_gpios[2],
    + "S5M8767 SET3");
    + if (ret == -EBUSY)
    + dev_warn(&pdev->dev, "Duplicated gpio request for SET3\n");
    + /* SET1 GPIO */
    + gpio_direction_output(pdata->buck_gpios[0],
    + (s5m8767->buck_gpioindex >> 2) & 0x1);
    + /* SET2 GPIO */
    + gpio_direction_output(pdata->buck_gpios[1],
    + (s5m8767->buck_gpioindex >> 1) & 0x1);
    + /* SET3 GPIO */
    + gpio_direction_output(pdata->buck_gpios[2],
    + (s5m8767->buck_gpioindex >> 0) & 0x1);
    + ret = 0;
    + } else {
    + dev_err(&pdev->dev, "GPIO NOT VALID\n");
    + ret = -EINVAL;
    + return ret;
    + }
    + }
    +
    + if (pdata->buck2_gpiodvs) {
    + if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
    + dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
    + ret = -EINVAL;
    + return ret;
    + }
    + }
    +
    + if (pdata->buck3_gpiodvs) {
    + if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
    + dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
    + ret = -EINVAL;
    + return ret;
    + }
    + }
    +
    + if (pdata->buck4_gpiodvs) {
    + if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
    + dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
    + ret = -EINVAL;
    + return ret;
    + }
    + }
    +
    + s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK2CTRL,
    + (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1);
    + s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK3CTRL,
    + (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1);
    + s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK4CTRL,
    + (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1);
    +
    + /* Initialize GPIO DVS registers */
    + for (i = 0; i < 8; i++) {
    + if (s5m8767->buck2_gpiodvs) {
    + s5m_reg_write(s5m8767->iodev, S5M8767_REG_BUCK2DVS1 + i,
    + s5m8767->buck2_vol[i]);
    + }
    +
    + if (s5m8767->buck3_gpiodvs) {
    + s5m_reg_write(s5m8767->iodev, S5M8767_REG_BUCK3DVS1 + i,
    + s5m8767->buck3_vol[i]);
    + }
    +
    + if (s5m8767->buck4_gpiodvs) {
    + s5m_reg_write(s5m8767->iodev, S5M8767_REG_BUCK4DVS1 + i,
    + s5m8767->buck4_vol[i]);
    + }
    + }
    + s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK2CTRL, 0x78, 0xff);
    + s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK3CTRL, 0x58, 0xff);
    + s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK4CTRL, 0x78, 0xff);
    +
    + if (s5m8767->buck2_ramp)
    + s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x08, 0x08);
    +
    + if (s5m8767->buck3_ramp)
    + s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x04, 0x04);
    +
    + if (s5m8767->buck4_ramp)
    + s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x02, 0x02);
    +
    + if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
    + || s5m8767->buck4_ramp) {
    + switch (s5m8767->ramp_delay) {
    + case 15:
    + s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
    + 0xc0, 0xf0);
    + case 25:
    + s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
    + 0xd0, 0xf0);
    + case 50:
    + s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
    + 0xe0, 0xf0);
    + case 100:
    + s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
    + 0xf0, 0xf0);
    + default:
    + s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
    + 0x90, 0xf0);
    + }
    + }
    +
    + for (i = 0; i < pdata->num_regulators; i++) {
    + const struct s5m_voltage_desc *desc;
    + int id = pdata->regulators[i].id;
    +
    + desc = reg_voltage_map[id];
    + if (desc)
    + regulators[id].n_voltages =
    + (desc->max - desc->min) / desc->step + 1;
    +
    + rdev[i] = regulator_register(&regulators[id], s5m8767->dev,
    + pdata->regulators[i].initdata, s5m8767);
    + if (IS_ERR(rdev[i])) {
    + ret = PTR_ERR(rdev[i]);
    + dev_err(s5m8767->dev, "regulator init failed for %d\n",
    + id);
    + rdev[i] = NULL;
    + goto err;
    + }
    + }
    +
    + return 0;
    +err:
    + for (i = 0; i < s5m8767->num_regulators; i++)
    + if (rdev[i])
    + regulator_unregister(rdev[i]);
    +
    + return ret;
    +}
    +
    +static int __devexit s5m8767_pmic_remove(struct platform_device *pdev)
    +{
    + struct s5m8767_info *s5m8767 = platform_get_drvdata(pdev);
    + struct regulator_dev **rdev = s5m8767->rdev;
    + int i;
    +
    + for (i = 0; i < s5m8767->num_regulators; i++)
    + if (rdev[i])
    + regulator_unregister(rdev[i]);
    +
    + return 0;
    +}
    +
    +static const struct platform_device_id s5m8767_pmic_id[] = {
    + { "s5m8767-pmic", 0},
    + { },
    +};
    +MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
    +
    +static struct platform_driver s5m8767_pmic_driver = {
    + .driver = {
    + .name = "s5m8767-pmic",
    + .owner = THIS_MODULE,
    + },
    + .probe = s5m8767_pmic_probe,
    + .remove = __devexit_p(s5m8767_pmic_remove),
    + .id_table = s5m8767_pmic_id,
    +};
    +
    +static int __init s5m8767_pmic_init(void)
    +{
    + return platform_driver_register(&s5m8767_pmic_driver);
    +}
    +subsys_initcall(s5m8767_pmic_init);
    +
    +static void __exit s5m8767_pmic_exit(void)
    +{
    + platform_driver_unregister(&s5m8767_pmic_driver);
    +}
    +module_exit(s5m8767_pmic_exit);
    +
    +/* Module information */
    +MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
    +MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
    +MODULE_LICENSE("GPL");
    +MODULE_ALIAS("platform:s5m8767-pmic");
    --
    1.7.1


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