[PATCH] regulator: Add S5M8767 regulator driver

From: Sangbeom Kim
Date: Mon Oct 24 2011 - 11:19:04 EST

S5M8767 is a cost-effective PMIC which is designed for mobile applications.
It includes high efficient 8 Buck converters, 27 LDOs, and an RTC.
This patch implement regulator driver for S5M8767.

Signed-off-by: Sangbeom Kim <sbkim73@xxxxxxxxxxx>
---
drivers/regulator/Kconfig | 8 +
drivers/regulator/Makefile | 1 +
drivers/regulator/s5m8767.c | 852 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 861 insertions(+), 0 deletions(-)
create mode 100644 drivers/regulator/s5m8767.c

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index c7fd2c0..9d35b8e 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -125,6 +125,14 @@ config REGULATOR_MAX8998
via I2C bus. The provided regulator is suitable for S3C6410
and S5PC1XX chips to control VCC_CORE and VCC_USIM voltages.

+config REGULATOR_S5M8767
+ tristate "Samsung S5M8767 voltage regulator"
+ depends on MFD_S5M_CORE
+ help
+ This driver controls a Samsung S5M8767 voltage output regulator
+ via I2C bus. S5M8767 have 8 Bucks and 27 LDOs output and
+ supports 8 DVS modes ranging from 0.65V to 2.225V by 6.25mV steps.
+
config REGULATOR_TWL4030
bool "TI TWL4030/TWL5030/TWL6030/TPS659x0 PMIC"
depends on TWL4030_CORE
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 040d5aa..478fc0f 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -45,5 +45,6 @@ obj-$(CONFIG_REGULATOR_AB8500) += ab8500.o
obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o
obj-$(CONFIG_REGULATOR_TPS65910) += tps65910-regulator.o
obj-$(CONFIG_REGULATOR_AAT2870) += aat2870-regulator.o
+obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o

ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG
diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
new file mode 100644
index 0000000..2c4c10c
--- /dev/null
+++ b/drivers/regulator/s5m8767.c
@@ -0,0 +1,852 @@
+/*
+ * 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/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/mfd/s5m87xx/s5m-pmic.h>
+#include <linux/mfd/s5m87xx/s5m-core.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_val = {
+ .max = 2225000,
+ .min = 650000,
+ .step = 6250,
+};
+
+static const struct s5m_voltage_desc ldo_voltage_val = {
+ .max = 3950000,
+ .min = 800000,
+ .step = 50000,
+};
+
+static const struct s5m_voltage_desc *reg_voltage_map[] = {
+ [S5M8767_LDO1] = &ldo_voltage_val,
+ [S5M8767_LDO2] = &ldo_voltage_val,
+ [S5M8767_LDO3] = &ldo_voltage_val,
+ [S5M8767_LDO4] = &ldo_voltage_val,
+ [S5M8767_LDO5] = &ldo_voltage_val,
+ [S5M8767_LDO6] = &ldo_voltage_val,
+ [S5M8767_LDO7] = &ldo_voltage_val,
+ [S5M8767_LDO8] = &ldo_voltage_val,
+ [S5M8767_LDO9] = &ldo_voltage_val,
+ [S5M8767_LDO10] = &ldo_voltage_val,
+ [S5M8767_LDO11] = &ldo_voltage_val,
+ [S5M8767_LDO12] = &ldo_voltage_val,
+ [S5M8767_LDO13] = &ldo_voltage_val,
+ [S5M8767_LDO14] = &ldo_voltage_val,
+ [S5M8767_LDO15] = &ldo_voltage_val,
+ [S5M8767_LDO16] = &ldo_voltage_val,
+ [S5M8767_LDO17] = &ldo_voltage_val,
+ [S5M8767_LDO18] = &ldo_voltage_val,
+ [S5M8767_LDO19] = &ldo_voltage_val,
+ [S5M8767_LDO20] = &ldo_voltage_val,
+ [S5M8767_LDO21] = &ldo_voltage_val,
+ [S5M8767_LDO22] = &ldo_voltage_val,
+ [S5M8767_LDO23] = &ldo_voltage_val,
+ [S5M8767_LDO24] = &ldo_voltage_val,
+ [S5M8767_LDO25] = &ldo_voltage_val,
+ [S5M8767_LDO26] = &ldo_voltage_val,
+ [S5M8767_LDO27] = &ldo_voltage_val,
+ [S5M8767_BUCK1] = &buck_voltage_val,
+ [S5M8767_BUCK2] = &buck_voltage_val,
+ [S5M8767_BUCK3] = &buck_voltage_val,
+ [S5M8767_BUCK4] = &buck_voltage_val,
+ [S5M8767_BUCK5] = &buck_voltage_val,
+ [S5M8767_BUCK6] = &buck_voltage_val,
+ [S5M8767_BUCK7] = NULL,
+ [S5M8767_BUCK8] = NULL,
+};
+
+static inline int s5m8767_get_regid(struct regulator_dev *rdev)
+{
+ return rdev_get_id(rdev);
+}
+
+static inline int s5m8767_is_buck(struct regulator_dev *rdev)
+{
+ int reg_id = s5m8767_get_regid(rdev);
+
+ return reg_id < S5M8767_LDO27;
+}
+
+static int s5m8767_list_voltage(struct regulator_dev *rdev,
+ unsigned int selector)
+{
+ const struct s5m_voltage_desc *desc;
+ int reg_id = s5m8767_get_regid(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_regid(rdev);
+
+ switch (reg_id) {
+ case S5M8767_LDO1 ... S5M8767_LDO27:
+ *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
+ 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 ... S5M8767_BUCK8:
+ *reg = S5M8767_REG_BUCK5CTRL1 + (reg_id - S5M8767_BUCK5) * 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=0x01, pattern=0x01;
+ u8 val;
+ int reg_id = s5m8767_get_regid(rdev);
+
+ switch (reg_id) {
+ case S5M8767_LDO1 ... S5M8767_LDO27:
+ mask = 0xc0;
+ pattern = 0xc0;
+ break;
+ case S5M8767_BUCK1 ... S5M8767_BUCK8:
+ break;
+ }
+
+ 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=0, pattern=0;
+ int reg_id = s5m8767_get_regid(rdev);
+
+ switch (reg_id) {
+ case S5M8767_LDO1 ... S5M8767_LDO27:
+ mask = 0xc0;
+ pattern = 0xc0;
+ break;
+ case S5M8767_BUCK1 ... S5M8767_BUCK8:
+ mask = 0x01;
+ pattern = 0x01;
+ break;
+ }
+
+ 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=0, pattern=0;
+ int reg_id = s5m8767_get_regid(rdev);
+
+ switch (reg_id) {
+ case S5M8767_LDO1 ... S5M8767_LDO27:
+ mask = 0xc0;
+ pattern = 0xc0;
+ break;
+ case S5M8767_BUCK1 ... S5M8767_BUCK8:
+ mask = 0x01;
+ pattern = 0x01;
+ break;
+ }
+
+ 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_regid(rdev);
+ int reg;
+
+ switch (reg_id) {
+ case S5M8767_LDO1 ... S5M8767_LDO27:
+ reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
+ 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 ... S5M8767_BUCK8:
+ reg = S5M8767_REG_BUCK5CTRL2 + (reg_id - S5M8767_BUCK5) * 2;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ *_reg = reg;
+
+ return 0;
+}
+
+static int s5m8767_get_voltage(struct regulator_dev *rdev)
+{
+ struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
+ int reg, mask=0xff, ret;
+ int reg_id = s5m8767_get_regid(rdev);
+ u8 val;
+
+ ret = s5m8767_get_voltage_register(rdev, &reg);
+ if (ret)
+ return ret;
+
+ switch (reg_id) {
+ case S5M8767_LDO1 ... S5M8767_LDO27:
+ 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;
+
+ if (rdev->desc && rdev->desc->ops && rdev->desc->ops->list_voltage)
+ return rdev->desc->ops->list_voltage(rdev, val);
+
+ return s5m8767_list_voltage(rdev, val);
+}
+
+static inline int s5m8767_convert_voltage(
+ const struct s5m_voltage_desc *desc,
+ int min_vol, int max_vol)
+{
+ int i = 0;
+
+ if (desc == NULL)
+ return -EINVAL;
+
+ if (max_vol < desc->min || min_vol > desc->max)
+ return -EINVAL;
+
+ i = (min_vol - desc->min) / desc->step;
+
+ if (desc->min + desc->step * i > max_vol)
+ return -EINVAL;
+
+ return i;
+}
+
+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_regid(rdev);
+ int reg, mask, ret;
+ int i;
+ u8 val;
+
+ switch (reg_id) {
+ case S5M8767_LDO1 ... S5M8767_LDO27:
+ mask = 0x3f;
+ break;
+ case S5M8767_BUCK1 ... S5M8767_BUCK6:
+ mask = 0xff;
+ break;
+ case S5M8767_BUCK7 ... S5M8767_BUCK8:
+ return -EINVAL;
+ 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_update(s5m8767->iodev, reg, i, mask);
+ *selector = i;
+
+ if (val < i)
+ udelay(DIV_ROUND_UP(desc->step * (i - val),
+ s5m8767->ramp_delay));
+
+ 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_regid(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);
+ }
+
+ 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_reg_enable_suspend(struct regulator_dev *rdev)
+{
+ return 0;
+}
+
+static int s5m8767_reg_disable_suspend(struct regulator_dev *rdev)
+{
+ struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
+ int ret, reg;
+ int mask=0, pattern=0;
+ int reg_id = s5m8767_get_regid(rdev);
+
+ switch (reg_id) {
+ case S5M8767_LDO1 ... S5M8767_LDO27:
+ mask = 0xc0;
+ pattern = 0xc0;
+ break;
+ case S5M8767_BUCK1 ... S5M8767_BUCK8:
+ mask = 0x01;
+ pattern = 0x01;
+ break;
+ }
+
+ ret = s5m8767_get_register(rdev, &reg);
+ if (ret)
+ return ret;
+
+ return s5m_reg_update(s5m8767->iodev, reg, ~pattern, mask);
+}
+
+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 = s5m8767_get_voltage,
+ .set_voltage = s5m8767_set_voltage,
+ .set_suspend_enable = s5m8767_reg_enable_suspend,
+ .set_suspend_disable = s5m8767_reg_disable_suspend,
+};
+
+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 = s5m8767_get_voltage,
+ .set_voltage = s5m8767_set_voltage_buck,
+ .set_suspend_enable = s5m8767_reg_enable_suspend,
+ .set_suspend_disable = s5m8767_reg_disable_suspend,
+};
+
+static struct regulator_ops s5m8767_others_ops = {
+ .is_enabled = s5m8767_reg_is_enabled,
+ .enable = s5m8767_reg_enable,
+ .disable = s5m8767_reg_disable,
+ .set_suspend_enable = s5m8767_reg_enable_suspend,
+ .set_suspend_disable = s5m8767_reg_disable_suspend,
+};
+
+#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_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),
+ {
+ .name = "AP 32KHz",
+ .id = S5M8767_32KHZAP_EN,
+ .ops = &s5m8767_others_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "CP 32KHz",
+ .id = S5M8767_32KHZAP_EN,
+ .ops = &s5m8767_others_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ },
+};
+
+static __devinit int s5m8767_pmic_probe(struct platform_device *pdev)
+{
+ struct s5m87xx_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+ struct s5m87xx_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;
+ u8 val;
+
+ if (!pdata) {
+ dev_err(pdev->dev.parent, "Platform data not supplied\n");
+ return -ENODEV;
+ }
+
+ s5m8767 = kzalloc(sizeof(struct s5m8767_info), GFP_KERNEL);
+ if (!s5m8767)
+ return -ENOMEM;
+
+ size = sizeof(struct regulator_dev *) * pdata->num_regulators;
+ s5m8767->rdev = kzalloc(size, GFP_KERNEL);
+ if (!s5m8767->rdev) {
+ kfree(s5m8767);
+ return -ENOMEM;
+ }
+
+ rdev = s5m8767->rdev;
+ s5m8767->dev = &pdev->dev;
+ s5m8767->iodev = iodev;
+ s5m8767->num_regulators = pdata->num_regulators;
+ 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_val,
+ pdata->buck2_voltage[i],
+ pdata->buck2_voltage[i] +
+ buck_voltage_val.step);
+ }
+
+ if (s5m8767->buck3_gpiodvs) {
+ s5m8767->buck3_vol[i] =
+ s5m8767_convert_voltage(
+ &buck_voltage_val,
+ pdata->buck3_voltage[i],
+ pdata->buck3_voltage[i] +
+ buck_voltage_val.step);
+ }
+
+ if (s5m8767->buck4_gpiodvs) {
+ s5m8767->buck4_vol[i] =
+ s5m8767_convert_voltage(
+ &buck_voltage_val,
+ pdata->buck4_voltage[i],
+ pdata->buck4_voltage[i] +
+ buck_voltage_val.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 ISN'T VALID\n");
+ ret = -EINVAL;
+ goto err_alloc;
+ }
+ }
+
+ 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]);
+ }
+ }
+
+ reg = S5M8767_REG_LDO7CTRL;
+
+ do{
+ ret = s5m_reg_read(s5m8767->iodev, reg, &val);
+ if (ret)
+ return ret;
+
+ s5m_reg_update(s5m8767->iodev, reg, ((val & 0x3f) | 0x80), 0xff);
+ reg++;
+ if ((reg == S5M8767_REG_LDO9CTRL)
+ || (reg == S5M8767_REG_LDO11CTRL)
+ || (reg == S5M8767_REG_LDO13CTRL)
+ || (reg == S5M8767_REG_LDO17CTRL))
+ reg++;
+ } while (reg <= S5M8767_REG_LDO27CTRL);
+
+ 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) {
+ if (s5m8767->ramp_delay < 15)
+ s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
+ s5m8767->ramp_delay - 1, 0xf0);
+ else if (s5m8767->ramp_delay == 15)
+ s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
+ 0xc0, 0xf0);
+ else if (s5m8767->ramp_delay == 25)
+ s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
+ 0xd0, 0xf0);
+ else if (s5m8767->ramp_delay == 50)
+ s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
+ 0xe0, 0xf0);
+ else if (s5m8767->ramp_delay == 100)
+ s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
+ 0xf0, 0xf0);
+ else
+ 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]);
+err_alloc:
+ kfree(s5m8767->rdev);
+ kfree(s5m8767);
+
+ 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]);
+
+ kfree(s5m8767->rdev);
+ kfree(s5m8767);
+
+ 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@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:s5m8767-pmic");
--
1.7.1

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