diff options
Diffstat (limited to 'drivers/regulator/s5m8767.c')
| -rw-r--r-- | drivers/regulator/s5m8767.c | 1012 |
1 files changed, 1012 insertions, 0 deletions
diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c new file mode 100644 index 0000000000..bfc0e143bf --- /dev/null +++ b/drivers/regulator/s5m8767.c @@ -0,0 +1,1012 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// Copyright (c) 2011 Samsung Electronics Co., Ltd +// http://www.samsung.com + +#include <linux/err.h> +#include <linux/of_gpio.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/mfd/samsung/core.h> +#include <linux/mfd/samsung/s5m8767.h> +#include <linux/regulator/of_regulator.h> +#include <linux/regmap.h> + +#define S5M8767_OPMODE_NORMAL_MODE 0x1 + +struct s5m8767_info { + struct device *dev; + struct sec_pmic_dev *iodev; + int num_regulators; + struct sec_opmode_data *opmode; + + 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_ds[3]; + int buck_gpioindex; +}; + +struct sec_voltage_desc { + int max; + int min; + int step; +}; + +static const struct sec_voltage_desc buck_voltage_val1 = { + .max = 2225000, + .min = 650000, + .step = 6250, +}; + +static const struct sec_voltage_desc buck_voltage_val2 = { + .max = 1600000, + .min = 600000, + .step = 6250, +}; + +static const struct sec_voltage_desc buck_voltage_val3 = { + .max = 3000000, + .min = 750000, + .step = 12500, +}; + +static const struct sec_voltage_desc ldo_voltage_val1 = { + .max = 3950000, + .min = 800000, + .step = 50000, +}; + +static const struct sec_voltage_desc ldo_voltage_val2 = { + .max = 2375000, + .min = 800000, + .step = 25000, +}; + +static const struct sec_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] = &buck_voltage_val3, + [S5M8767_BUCK8] = &buck_voltage_val3, + [S5M8767_BUCK9] = &buck_voltage_val3, +}; + +static const unsigned int s5m8767_opmode_reg[][4] = { + /* {OFF, ON, LOWPOWER, SUSPEND} */ + /* LDO1 ... LDO28 */ + {0x0, 0x3, 0x2, 0x1}, /* LDO1 */ + {0x0, 0x3, 0x2, 0x1}, + {0x0, 0x3, 0x2, 0x1}, + {0x0, 0x0, 0x0, 0x0}, + {0x0, 0x3, 0x2, 0x1}, /* LDO5 */ + {0x0, 0x3, 0x2, 0x1}, + {0x0, 0x3, 0x2, 0x1}, + {0x0, 0x3, 0x2, 0x1}, + {0x0, 0x3, 0x2, 0x1}, + {0x0, 0x3, 0x2, 0x1}, /* LDO10 */ + {0x0, 0x3, 0x2, 0x1}, + {0x0, 0x3, 0x2, 0x1}, + {0x0, 0x3, 0x2, 0x1}, + {0x0, 0x3, 0x2, 0x1}, + {0x0, 0x3, 0x2, 0x1}, /* LDO15 */ + {0x0, 0x3, 0x2, 0x1}, + {0x0, 0x3, 0x2, 0x1}, + {0x0, 0x0, 0x0, 0x0}, + {0x0, 0x3, 0x2, 0x1}, + {0x0, 0x3, 0x2, 0x1}, /* LDO20 */ + {0x0, 0x3, 0x2, 0x1}, + {0x0, 0x3, 0x2, 0x1}, + {0x0, 0x0, 0x0, 0x0}, + {0x0, 0x3, 0x2, 0x1}, + {0x0, 0x3, 0x2, 0x1}, /* LDO25 */ + {0x0, 0x3, 0x2, 0x1}, + {0x0, 0x3, 0x2, 0x1}, + {0x0, 0x3, 0x2, 0x1}, /* LDO28 */ + + /* BUCK1 ... BUCK9 */ + {0x0, 0x3, 0x1, 0x1}, /* BUCK1 */ + {0x0, 0x3, 0x1, 0x1}, + {0x0, 0x3, 0x1, 0x1}, + {0x0, 0x3, 0x1, 0x1}, + {0x0, 0x3, 0x2, 0x1}, /* BUCK5 */ + {0x0, 0x3, 0x1, 0x1}, + {0x0, 0x3, 0x1, 0x1}, + {0x0, 0x3, 0x1, 0x1}, + {0x0, 0x3, 0x1, 0x1}, /* BUCK9 */ +}; + +static int s5m8767_get_register(struct s5m8767_info *s5m8767, int reg_id, + int *reg, int *enable_ctrl) +{ + int i; + unsigned int mode; + + 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; + } + + for (i = 0; i < s5m8767->num_regulators; i++) { + if (s5m8767->opmode[i].id == reg_id) { + mode = s5m8767->opmode[i].mode; + break; + } + } + + if (i >= s5m8767->num_regulators) + return -EINVAL; + + *enable_ctrl = s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT; + + return 0; +} + +static int s5m8767_get_vsel_reg(int reg_id, struct s5m8767_info *s5m8767) +{ + 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; + if (s5m8767->buck2_gpiodvs) + reg += s5m8767->buck_gpioindex; + break; + case S5M8767_BUCK3: + reg = S5M8767_REG_BUCK3DVS1; + if (s5m8767->buck3_gpiodvs) + reg += s5m8767->buck_gpioindex; + break; + case S5M8767_BUCK4: + reg = S5M8767_REG_BUCK4DVS1; + if (s5m8767->buck4_gpiodvs) + reg += s5m8767->buck_gpioindex; + 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; + } + + return reg; +} + +static int s5m8767_convert_voltage_to_sel(const struct sec_voltage_desc *desc, + int min_vol) +{ + int selector = 0; + + if (desc == NULL) + return -EINVAL; + + if (min_vol > desc->max) + return -EINVAL; + + if (min_vol < desc->min) + min_vol = desc->min; + + selector = DIV_ROUND_UP(min_vol - desc->min, desc->step); + + if (desc->min + desc->step * selector > desc->max) + return -EINVAL; + + return selector; +} + +static inline int 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); + + return 0; +} + +static inline int 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); + + return 0; +} + +static int s5m8767_set_voltage_sel(struct regulator_dev *rdev, + unsigned selector) +{ + struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev); + int reg_id = rdev_get_id(rdev); + int old_index, index = 0; + u8 *buck234_vol = NULL; + + switch (reg_id) { + case S5M8767_LDO1 ... S5M8767_LDO28: + break; + case S5M8767_BUCK1 ... S5M8767_BUCK6: + if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs) + buck234_vol = &s5m8767->buck2_vol[0]; + else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs) + buck234_vol = &s5m8767->buck3_vol[0]; + else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs) + buck234_vol = &s5m8767->buck4_vol[0]; + break; + case S5M8767_BUCK7 ... S5M8767_BUCK8: + return -EINVAL; + case S5M8767_BUCK9: + break; + default: + return -EINVAL; + } + + /* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */ + if (buck234_vol) { + while (*buck234_vol != selector) { + buck234_vol++; + index++; + } + old_index = s5m8767->buck_gpioindex; + s5m8767->buck_gpioindex = index; + + if (index > old_index) + return s5m8767_set_high(s5m8767); + else + return s5m8767_set_low(s5m8767); + } else { + return regulator_set_voltage_sel_regmap(rdev, selector); + } +} + +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); + + if ((old_sel < new_sel) && s5m8767->ramp_delay) + return DIV_ROUND_UP(rdev->desc->uV_step * (new_sel - old_sel), + s5m8767->ramp_delay * 1000); + return 0; +} + +static const struct regulator_ops s5m8767_ops = { + .list_voltage = regulator_list_voltage_linear, + .is_enabled = regulator_is_enabled_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = s5m8767_set_voltage_sel, + .set_voltage_time_sel = s5m8767_set_voltage_time_sel, +}; + +static const struct regulator_ops s5m8767_buck78_ops = { + .list_voltage = regulator_list_voltage_linear, + .is_enabled = regulator_is_enabled_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, +}; + +#define s5m8767_regulator_desc(_name) { \ + .name = #_name, \ + .id = S5M8767_##_name, \ + .ops = &s5m8767_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ +} + +#define s5m8767_regulator_buck78_desc(_name) { \ + .name = #_name, \ + .id = S5M8767_##_name, \ + .ops = &s5m8767_buck78_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ +} + +static struct regulator_desc regulators[] = { + s5m8767_regulator_desc(LDO1), + s5m8767_regulator_desc(LDO2), + s5m8767_regulator_desc(LDO3), + s5m8767_regulator_desc(LDO4), + s5m8767_regulator_desc(LDO5), + s5m8767_regulator_desc(LDO6), + s5m8767_regulator_desc(LDO7), + s5m8767_regulator_desc(LDO8), + s5m8767_regulator_desc(LDO9), + s5m8767_regulator_desc(LDO10), + s5m8767_regulator_desc(LDO11), + s5m8767_regulator_desc(LDO12), + s5m8767_regulator_desc(LDO13), + s5m8767_regulator_desc(LDO14), + s5m8767_regulator_desc(LDO15), + s5m8767_regulator_desc(LDO16), + s5m8767_regulator_desc(LDO17), + s5m8767_regulator_desc(LDO18), + s5m8767_regulator_desc(LDO19), + s5m8767_regulator_desc(LDO20), + s5m8767_regulator_desc(LDO21), + s5m8767_regulator_desc(LDO22), + s5m8767_regulator_desc(LDO23), + s5m8767_regulator_desc(LDO24), + s5m8767_regulator_desc(LDO25), + s5m8767_regulator_desc(LDO26), + s5m8767_regulator_desc(LDO27), + s5m8767_regulator_desc(LDO28), + s5m8767_regulator_desc(BUCK1), + s5m8767_regulator_desc(BUCK2), + s5m8767_regulator_desc(BUCK3), + s5m8767_regulator_desc(BUCK4), + s5m8767_regulator_desc(BUCK5), + s5m8767_regulator_desc(BUCK6), + s5m8767_regulator_buck78_desc(BUCK7), + s5m8767_regulator_buck78_desc(BUCK8), + s5m8767_regulator_desc(BUCK9), +}; + +/* + * Enable GPIO control over BUCK9 in regulator_config for that regulator. + */ +static void s5m8767_regulator_config_ext_control(struct s5m8767_info *s5m8767, + struct sec_regulator_data *rdata, + struct regulator_config *config) +{ + int i, mode = 0; + + if (rdata->id != S5M8767_BUCK9) + return; + + /* Check if opmode for regulator matches S5M8767_ENCTRL_USE_GPIO */ + for (i = 0; i < s5m8767->num_regulators; i++) { + const struct sec_opmode_data *opmode = &s5m8767->opmode[i]; + if (opmode->id == rdata->id) { + mode = s5m8767_opmode_reg[rdata->id][opmode->mode]; + break; + } + } + if (mode != S5M8767_ENCTRL_USE_GPIO) { + dev_warn(s5m8767->dev, + "ext-control for %pOFn: mismatched op_mode (%x), ignoring\n", + rdata->reg_node, mode); + return; + } + + if (!rdata->ext_control_gpiod) { + dev_warn(s5m8767->dev, + "ext-control for %pOFn: GPIO not valid, ignoring\n", + rdata->reg_node); + return; + } + + config->ena_gpiod = rdata->ext_control_gpiod; +} + +/* + * Turn on GPIO control over BUCK9. + */ +static int s5m8767_enable_ext_control(struct s5m8767_info *s5m8767, + struct regulator_dev *rdev) +{ + int id = rdev_get_id(rdev); + int ret, reg, enable_ctrl; + + if (id != S5M8767_BUCK9) + return -EINVAL; + + ret = s5m8767_get_register(s5m8767, id, ®, &enable_ctrl); + if (ret) + return ret; + + return regmap_update_bits(s5m8767->iodev->regmap_pmic, + reg, S5M8767_ENCTRL_MASK, + S5M8767_ENCTRL_USE_GPIO << S5M8767_ENCTRL_SHIFT); +} + + +#ifdef CONFIG_OF +static int s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev *iodev, + struct sec_platform_data *pdata, + struct device_node *pmic_np) +{ + int i, gpio; + + for (i = 0; i < 3; i++) { + gpio = of_get_named_gpio(pmic_np, + "s5m8767,pmic-buck-dvs-gpios", i); + if (!gpio_is_valid(gpio)) { + dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio); + return -EINVAL; + } + pdata->buck_gpios[i] = gpio; + } + return 0; +} + +static int s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev *iodev, + struct sec_platform_data *pdata, + struct device_node *pmic_np) +{ + int i, gpio; + + for (i = 0; i < 3; i++) { + gpio = of_get_named_gpio(pmic_np, + "s5m8767,pmic-buck-ds-gpios", i); + if (!gpio_is_valid(gpio)) { + dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio); + return -EINVAL; + } + pdata->buck_ds[i] = gpio; + } + return 0; +} + +static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev, + struct sec_platform_data *pdata) +{ + struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent); + struct device_node *pmic_np, *regulators_np, *reg_np; + struct sec_regulator_data *rdata; + struct sec_opmode_data *rmode; + unsigned int i, dvs_voltage_nr = 8, ret; + + pmic_np = iodev->dev->of_node; + if (!pmic_np) { + dev_err(iodev->dev, "could not find pmic sub-node\n"); + return -ENODEV; + } + + regulators_np = of_get_child_by_name(pmic_np, "regulators"); + if (!regulators_np) { + dev_err(iodev->dev, "could not find regulators sub-node\n"); + return -EINVAL; + } + + /* count the number of regulators to be supported in pmic */ + pdata->num_regulators = of_get_child_count(regulators_np); + + rdata = devm_kcalloc(&pdev->dev, + pdata->num_regulators, sizeof(*rdata), + GFP_KERNEL); + if (!rdata) { + of_node_put(regulators_np); + return -ENOMEM; + } + + rmode = devm_kcalloc(&pdev->dev, + pdata->num_regulators, sizeof(*rmode), + GFP_KERNEL); + if (!rmode) { + of_node_put(regulators_np); + return -ENOMEM; + } + + pdata->regulators = rdata; + pdata->opmode = rmode; + for_each_child_of_node(regulators_np, reg_np) { + for (i = 0; i < ARRAY_SIZE(regulators); i++) + if (of_node_name_eq(reg_np, regulators[i].name)) + break; + + if (i == ARRAY_SIZE(regulators)) { + dev_warn(iodev->dev, + "don't know how to configure regulator %pOFn\n", + reg_np); + continue; + } + + rdata->ext_control_gpiod = devm_fwnode_gpiod_get( + &pdev->dev, + of_fwnode_handle(reg_np), + "s5m8767,pmic-ext-control", + GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE, + "s5m8767"); + if (PTR_ERR(rdata->ext_control_gpiod) == -ENOENT) { + rdata->ext_control_gpiod = NULL; + } else if (IS_ERR(rdata->ext_control_gpiod)) { + of_node_put(reg_np); + of_node_put(regulators_np); + return PTR_ERR(rdata->ext_control_gpiod); + } + + rdata->id = i; + rdata->initdata = of_get_regulator_init_data( + &pdev->dev, reg_np, + ®ulators[i]); + rdata->reg_node = reg_np; + rdata++; + rmode->id = i; + if (of_property_read_u32(reg_np, "op_mode", + &rmode->mode)) { + dev_warn(iodev->dev, + "no op_mode property at %pOF\n", + reg_np); + + rmode->mode = S5M8767_OPMODE_NORMAL_MODE; + } + rmode++; + } + + of_node_put(regulators_np); + + if (of_property_read_bool(pmic_np, "s5m8767,pmic-buck2-uses-gpio-dvs")) { + pdata->buck2_gpiodvs = true; + + if (of_property_read_u32_array(pmic_np, + "s5m8767,pmic-buck2-dvs-voltage", + pdata->buck2_voltage, dvs_voltage_nr)) { + dev_err(iodev->dev, "buck2 voltages not specified\n"); + return -EINVAL; + } + } + + if (of_property_read_bool(pmic_np, "s5m8767,pmic-buck3-uses-gpio-dvs")) { + pdata->buck3_gpiodvs = true; + + if (of_property_read_u32_array(pmic_np, + "s5m8767,pmic-buck3-dvs-voltage", + pdata->buck3_voltage, dvs_voltage_nr)) { + dev_err(iodev->dev, "buck3 voltages not specified\n"); + return -EINVAL; + } + } + + if (of_property_read_bool(pmic_np, "s5m8767,pmic-buck4-uses-gpio-dvs")) { + pdata->buck4_gpiodvs = true; + + if (of_property_read_u32_array(pmic_np, + "s5m8767,pmic-buck4-dvs-voltage", + pdata->buck4_voltage, dvs_voltage_nr)) { + dev_err(iodev->dev, "buck4 voltages not specified\n"); + return -EINVAL; + } + } + + if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs || + pdata->buck4_gpiodvs) { + ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np); + if (ret) + return -EINVAL; + + if (of_property_read_u32(pmic_np, + "s5m8767,pmic-buck-default-dvs-idx", + &pdata->buck_default_idx)) { + pdata->buck_default_idx = 0; + } else { + if (pdata->buck_default_idx >= 8) { + pdata->buck_default_idx = 0; + dev_info(iodev->dev, + "invalid value for default dvs index, use 0\n"); + } + } + } + + ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np); + if (ret) + return -EINVAL; + + pdata->buck2_ramp_enable = of_property_read_bool(pmic_np, "s5m8767,pmic-buck2-ramp-enable"); + pdata->buck3_ramp_enable = of_property_read_bool(pmic_np, "s5m8767,pmic-buck3-ramp-enable"); + pdata->buck4_ramp_enable = of_property_read_bool(pmic_np, "s5m8767,pmic-buck4-ramp-enable"); + + if (pdata->buck2_ramp_enable || pdata->buck3_ramp_enable + || pdata->buck4_ramp_enable) { + if (of_property_read_u32(pmic_np, "s5m8767,pmic-buck-ramp-delay", + &pdata->buck_ramp_delay)) + pdata->buck_ramp_delay = 0; + } + + return 0; +} +#else +static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev, + struct sec_platform_data *pdata) +{ + return 0; +} +#endif /* CONFIG_OF */ + +static int s5m8767_pmic_probe(struct platform_device *pdev) +{ + struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent); + struct sec_platform_data *pdata = iodev->pdata; + struct regulator_config config = { }; + struct s5m8767_info *s5m8767; + int i, ret, buck_init; + + if (!pdata) { + dev_err(pdev->dev.parent, "Platform data not supplied\n"); + return -ENODEV; + } + + if (iodev->dev->of_node) { + ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata); + if (ret) + return ret; + } + + if (pdata->buck2_gpiodvs) { + if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) { + dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n"); + return -EINVAL; + } + } + + if (pdata->buck3_gpiodvs) { + if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) { + dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n"); + return -EINVAL; + } + } + + if (pdata->buck4_gpiodvs) { + if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) { + dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n"); + return -EINVAL; + } + } + + s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info), + GFP_KERNEL); + if (!s5m8767) + return -ENOMEM; + + s5m8767->dev = &pdev->dev; + s5m8767->iodev = iodev; + s5m8767->num_regulators = pdata->num_regulators; + platform_set_drvdata(pdev, s5m8767); + + 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->buck_ds[0] = pdata->buck_ds[0]; + s5m8767->buck_ds[1] = pdata->buck_ds[1]; + s5m8767->buck_ds[2] = pdata->buck_ds[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; + s5m8767->opmode = pdata->opmode; + + buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2, + pdata->buck2_init); + + regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK2DVS2, + buck_init); + + buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2, + pdata->buck3_init); + + regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK3DVS2, + buck_init); + + buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2, + pdata->buck4_init); + + regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK4DVS2, + buck_init); + + for (i = 0; i < 8; i++) { + if (s5m8767->buck2_gpiodvs) { + s5m8767->buck2_vol[i] = + s5m8767_convert_voltage_to_sel( + &buck_voltage_val2, + pdata->buck2_voltage[i]); + } + + if (s5m8767->buck3_gpiodvs) { + s5m8767->buck3_vol[i] = + s5m8767_convert_voltage_to_sel( + &buck_voltage_val2, + pdata->buck3_voltage[i]); + } + + if (s5m8767->buck4_gpiodvs) { + s5m8767->buck4_vol[i] = + s5m8767_convert_voltage_to_sel( + &buck_voltage_val2, + pdata->buck4_voltage[i]); + } + } + + 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])) { + dev_err(&pdev->dev, "GPIO NOT VALID\n"); + return -EINVAL; + } + + ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0], + "S5M8767 SET1"); + if (ret) + return ret; + + ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1], + "S5M8767 SET2"); + if (ret) + return ret; + + ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2], + "S5M8767 SET3"); + if (ret) + return ret; + + /* 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 = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2"); + if (ret) + return ret; + + ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3"); + if (ret) + return ret; + + ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4"); + if (ret) + return ret; + + /* DS2 GPIO */ + gpio_direction_output(pdata->buck_ds[0], 0x0); + /* DS3 GPIO */ + gpio_direction_output(pdata->buck_ds[1], 0x0); + /* DS4 GPIO */ + gpio_direction_output(pdata->buck_ds[2], 0x0); + + regmap_update_bits(s5m8767->iodev->regmap_pmic, + S5M8767_REG_BUCK2CTRL, 1 << 1, + (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1)); + regmap_update_bits(s5m8767->iodev->regmap_pmic, + S5M8767_REG_BUCK3CTRL, 1 << 1, + (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1)); + regmap_update_bits(s5m8767->iodev->regmap_pmic, + S5M8767_REG_BUCK4CTRL, 1 << 1, + (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1)); + + /* Initialize GPIO DVS registers */ + for (i = 0; i < 8; i++) { + if (s5m8767->buck2_gpiodvs) { + regmap_write(s5m8767->iodev->regmap_pmic, + S5M8767_REG_BUCK2DVS1 + i, + s5m8767->buck2_vol[i]); + } + + if (s5m8767->buck3_gpiodvs) { + regmap_write(s5m8767->iodev->regmap_pmic, + S5M8767_REG_BUCK3DVS1 + i, + s5m8767->buck3_vol[i]); + } + + if (s5m8767->buck4_gpiodvs) { + regmap_write(s5m8767->iodev->regmap_pmic, + S5M8767_REG_BUCK4DVS1 + i, + s5m8767->buck4_vol[i]); + } + } + + if (s5m8767->buck2_ramp) + regmap_update_bits(s5m8767->iodev->regmap_pmic, + S5M8767_REG_DVSRAMP, 0x08, 0x08); + + if (s5m8767->buck3_ramp) + regmap_update_bits(s5m8767->iodev->regmap_pmic, + S5M8767_REG_DVSRAMP, 0x04, 0x04); + + if (s5m8767->buck4_ramp) + regmap_update_bits(s5m8767->iodev->regmap_pmic, + S5M8767_REG_DVSRAMP, 0x02, 0x02); + + if (s5m8767->buck2_ramp || s5m8767->buck3_ramp + || s5m8767->buck4_ramp) { + unsigned int val; + switch (s5m8767->ramp_delay) { + case 5: + val = S5M8767_DVS_BUCK_RAMP_5; + break; + case 10: + val = S5M8767_DVS_BUCK_RAMP_10; + break; + case 25: + val = S5M8767_DVS_BUCK_RAMP_25; + break; + case 50: + val = S5M8767_DVS_BUCK_RAMP_50; + break; + case 100: + val = S5M8767_DVS_BUCK_RAMP_100; + break; + default: + val = S5M8767_DVS_BUCK_RAMP_10; + } + regmap_update_bits(s5m8767->iodev->regmap_pmic, + S5M8767_REG_DVSRAMP, + S5M8767_DVS_BUCK_RAMP_MASK, + val << S5M8767_DVS_BUCK_RAMP_SHIFT); + } + + for (i = 0; i < pdata->num_regulators; i++) { + const struct sec_voltage_desc *desc; + unsigned int id = pdata->regulators[i].id; + int enable_reg, enable_val; + struct regulator_dev *rdev; + + BUILD_BUG_ON(ARRAY_SIZE(regulators) != ARRAY_SIZE(reg_voltage_map)); + if (WARN_ON_ONCE(id >= ARRAY_SIZE(regulators))) + continue; + + desc = reg_voltage_map[id]; + if (desc) { + regulators[id].n_voltages = + (desc->max - desc->min) / desc->step + 1; + regulators[id].min_uV = desc->min; + regulators[id].uV_step = desc->step; + regulators[id].vsel_reg = + s5m8767_get_vsel_reg(id, s5m8767); + if (id < S5M8767_BUCK1) + regulators[id].vsel_mask = 0x3f; + else + regulators[id].vsel_mask = 0xff; + + ret = s5m8767_get_register(s5m8767, id, &enable_reg, + &enable_val); + if (ret) { + dev_err(s5m8767->dev, "error reading registers\n"); + return ret; + } + regulators[id].enable_reg = enable_reg; + regulators[id].enable_mask = S5M8767_ENCTRL_MASK; + regulators[id].enable_val = enable_val; + } + + config.dev = s5m8767->dev; + config.init_data = pdata->regulators[i].initdata; + config.driver_data = s5m8767; + config.regmap = iodev->regmap_pmic; + config.of_node = pdata->regulators[i].reg_node; + config.ena_gpiod = NULL; + if (pdata->regulators[i].ext_control_gpiod) { + /* Assigns config.ena_gpiod */ + s5m8767_regulator_config_ext_control(s5m8767, + &pdata->regulators[i], &config); + + /* + * Hand the GPIO descriptor management over to the + * regulator core, remove it from devres management. + */ + devm_gpiod_unhinge(s5m8767->dev, config.ena_gpiod); + } + rdev = devm_regulator_register(&pdev->dev, ®ulators[id], + &config); + if (IS_ERR(rdev)) { + ret = PTR_ERR(rdev); + dev_err(s5m8767->dev, "regulator init failed for %d\n", + id); + return ret; + } + + if (pdata->regulators[i].ext_control_gpiod) { + ret = s5m8767_enable_ext_control(s5m8767, rdev); + if (ret < 0) { + dev_err(s5m8767->dev, + "failed to enable gpio control over %s: %d\n", + rdev->desc->name, ret); + return ret; + } + } + } + + 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", + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + }, + .probe = s5m8767_pmic_probe, + .id_table = s5m8767_pmic_id, +}; +module_platform_driver(s5m8767_pmic_driver); + +/* Module information */ +MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); +MODULE_DESCRIPTION("Samsung S5M8767 Regulator Driver"); +MODULE_LICENSE("GPL"); |