| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright 2012 Texas Instruments |
| * |
| * Author: Milo(Woogyom) Kim <milo.kim@ti.com> |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/i2c.h> |
| #include <linux/regmap.h> |
| #include <linux/err.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/delay.h> |
| #include <linux/regulator/lp872x.h> |
| #include <linux/regulator/driver.h> |
| #include <linux/platform_device.h> |
| #include <linux/of.h> |
| #include <linux/regulator/of_regulator.h> |
| |
| /* Registers : LP8720/8725 shared */ |
| #define LP872X_GENERAL_CFG 0x00 |
| #define LP872X_LDO1_VOUT 0x01 |
| #define LP872X_LDO2_VOUT 0x02 |
| #define LP872X_LDO3_VOUT 0x03 |
| #define LP872X_LDO4_VOUT 0x04 |
| #define LP872X_LDO5_VOUT 0x05 |
| |
| /* Registers : LP8720 */ |
| #define LP8720_BUCK_VOUT1 0x06 |
| #define LP8720_BUCK_VOUT2 0x07 |
| #define LP8720_ENABLE 0x08 |
| |
| /* Registers : LP8725 */ |
| #define LP8725_LILO1_VOUT 0x06 |
| #define LP8725_LILO2_VOUT 0x07 |
| #define LP8725_BUCK1_VOUT1 0x08 |
| #define LP8725_BUCK1_VOUT2 0x09 |
| #define LP8725_BUCK2_VOUT1 0x0A |
| #define LP8725_BUCK2_VOUT2 0x0B |
| #define LP8725_BUCK_CTRL 0x0C |
| #define LP8725_LDO_CTRL 0x0D |
| |
| /* Mask/shift : LP8720/LP8725 shared */ |
| #define LP872X_VOUT_M 0x1F |
| #define LP872X_START_DELAY_M 0xE0 |
| #define LP872X_START_DELAY_S 5 |
| #define LP872X_EN_LDO1_M BIT(0) |
| #define LP872X_EN_LDO2_M BIT(1) |
| #define LP872X_EN_LDO3_M BIT(2) |
| #define LP872X_EN_LDO4_M BIT(3) |
| #define LP872X_EN_LDO5_M BIT(4) |
| |
| /* Mask/shift : LP8720 */ |
| #define LP8720_TIMESTEP_S 0 /* Addr 00h */ |
| #define LP8720_TIMESTEP_M BIT(0) |
| #define LP8720_EXT_DVS_M BIT(2) |
| #define LP8720_BUCK_FPWM_S 5 /* Addr 07h */ |
| #define LP8720_BUCK_FPWM_M BIT(5) |
| #define LP8720_EN_BUCK_M BIT(5) /* Addr 08h */ |
| #define LP8720_DVS_SEL_M BIT(7) |
| |
| /* Mask/shift : LP8725 */ |
| #define LP8725_TIMESTEP_M 0xC0 /* Addr 00h */ |
| #define LP8725_TIMESTEP_S 6 |
| #define LP8725_BUCK1_EN_M BIT(0) |
| #define LP8725_DVS1_M BIT(2) |
| #define LP8725_DVS2_M BIT(3) |
| #define LP8725_BUCK2_EN_M BIT(4) |
| #define LP8725_BUCK_CL_M 0xC0 /* Addr 09h, 0Bh */ |
| #define LP8725_BUCK_CL_S 6 |
| #define LP8725_BUCK1_FPWM_S 1 /* Addr 0Ch */ |
| #define LP8725_BUCK1_FPWM_M BIT(1) |
| #define LP8725_BUCK2_FPWM_S 5 |
| #define LP8725_BUCK2_FPWM_M BIT(5) |
| #define LP8725_EN_LILO1_M BIT(5) /* Addr 0Dh */ |
| #define LP8725_EN_LILO2_M BIT(6) |
| |
| /* PWM mode */ |
| #define LP872X_FORCE_PWM 1 |
| #define LP872X_AUTO_PWM 0 |
| |
| #define LP8720_NUM_REGULATORS 6 |
| #define LP8725_NUM_REGULATORS 9 |
| #define EXTERN_DVS_USED 0 |
| #define MAX_DELAY 6 |
| |
| /* Default DVS Mode */ |
| #define LP8720_DEFAULT_DVS 0 |
| #define LP8725_DEFAULT_DVS BIT(2) |
| |
| /* dump registers in regmap-debugfs */ |
| #define MAX_REGISTERS 0x0F |
| |
| enum lp872x_id { |
| LP8720, |
| LP8725, |
| }; |
| |
| struct lp872x { |
| struct regmap *regmap; |
| struct device *dev; |
| enum lp872x_id chipid; |
| struct lp872x_platform_data *pdata; |
| int num_regulators; |
| enum gpiod_flags dvs_pin; |
| }; |
| |
| /* LP8720/LP8725 shared voltage table for LDOs */ |
| static const unsigned int lp872x_ldo_vtbl[] = { |
| 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000, |
| 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 2000000, |
| 2100000, 2200000, 2300000, 2400000, 2500000, 2600000, 2650000, 2700000, |
| 2750000, 2800000, 2850000, 2900000, 2950000, 3000000, 3100000, 3300000, |
| }; |
| |
| /* LP8720 LDO4 voltage table */ |
| static const unsigned int lp8720_ldo4_vtbl[] = { |
| 800000, 850000, 900000, 1000000, 1100000, 1200000, 1250000, 1300000, |
| 1350000, 1400000, 1450000, 1500000, 1550000, 1600000, 1650000, 1700000, |
| 1750000, 1800000, 1850000, 1900000, 2000000, 2100000, 2200000, 2300000, |
| 2400000, 2500000, 2600000, 2650000, 2700000, 2750000, 2800000, 2850000, |
| }; |
| |
| /* LP8725 LILO(Low Input Low Output) voltage table */ |
| static const unsigned int lp8725_lilo_vtbl[] = { |
| 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, |
| 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1700000, |
| 1800000, 1900000, 2000000, 2100000, 2200000, 2300000, 2400000, 2500000, |
| 2600000, 2700000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000, |
| }; |
| |
| /* LP8720 BUCK voltage table */ |
| #define EXT_R 0 /* external resistor divider */ |
| static const unsigned int lp8720_buck_vtbl[] = { |
| EXT_R, 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, |
| 1150000, 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, |
| 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, |
| 1950000, 2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, |
| }; |
| |
| /* LP8725 BUCK voltage table */ |
| static const unsigned int lp8725_buck_vtbl[] = { |
| 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, |
| 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1700000, |
| 1750000, 1800000, 1850000, 1900000, 2000000, 2100000, 2200000, 2300000, |
| 2400000, 2500000, 2600000, 2700000, 2800000, 2850000, 2900000, 3000000, |
| }; |
| |
| /* LP8725 BUCK current limit */ |
| static const unsigned int lp8725_buck_uA[] = { |
| 460000, 780000, 1050000, 1370000, |
| }; |
| |
| static int lp872x_read_byte(struct lp872x *lp, u8 addr, u8 *data) |
| { |
| int ret; |
| unsigned int val; |
| |
| ret = regmap_read(lp->regmap, addr, &val); |
| if (ret < 0) { |
| dev_err(lp->dev, "failed to read 0x%.2x\n", addr); |
| return ret; |
| } |
| |
| *data = (u8)val; |
| return 0; |
| } |
| |
| static inline int lp872x_write_byte(struct lp872x *lp, u8 addr, u8 data) |
| { |
| return regmap_write(lp->regmap, addr, data); |
| } |
| |
| static inline int lp872x_update_bits(struct lp872x *lp, u8 addr, |
| unsigned int mask, u8 data) |
| { |
| return regmap_update_bits(lp->regmap, addr, mask, data); |
| } |
| |
| static int lp872x_get_timestep_usec(struct lp872x *lp) |
| { |
| enum lp872x_id chip = lp->chipid; |
| u8 val, mask, shift; |
| int *time_usec, size, ret; |
| int lp8720_time_usec[] = { 25, 50 }; |
| int lp8725_time_usec[] = { 32, 64, 128, 256 }; |
| |
| switch (chip) { |
| case LP8720: |
| mask = LP8720_TIMESTEP_M; |
| shift = LP8720_TIMESTEP_S; |
| time_usec = &lp8720_time_usec[0]; |
| size = ARRAY_SIZE(lp8720_time_usec); |
| break; |
| case LP8725: |
| mask = LP8725_TIMESTEP_M; |
| shift = LP8725_TIMESTEP_S; |
| time_usec = &lp8725_time_usec[0]; |
| size = ARRAY_SIZE(lp8725_time_usec); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| ret = lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val); |
| if (ret) |
| return ret; |
| |
| val = (val & mask) >> shift; |
| if (val >= size) |
| return -EINVAL; |
| |
| return *(time_usec + val); |
| } |
| |
| static int lp872x_regulator_enable_time(struct regulator_dev *rdev) |
| { |
| struct lp872x *lp = rdev_get_drvdata(rdev); |
| enum lp872x_regulator_id rid = rdev_get_id(rdev); |
| int time_step_us = lp872x_get_timestep_usec(lp); |
| int ret; |
| u8 addr, val; |
| |
| if (time_step_us < 0) |
| return time_step_us; |
| |
| switch (rid) { |
| case LP8720_ID_LDO1 ... LP8720_ID_BUCK: |
| addr = LP872X_LDO1_VOUT + rid; |
| break; |
| case LP8725_ID_LDO1 ... LP8725_ID_BUCK1: |
| addr = LP872X_LDO1_VOUT + rid - LP8725_ID_BASE; |
| break; |
| case LP8725_ID_BUCK2: |
| addr = LP8725_BUCK2_VOUT1; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| ret = lp872x_read_byte(lp, addr, &val); |
| if (ret) |
| return ret; |
| |
| val = (val & LP872X_START_DELAY_M) >> LP872X_START_DELAY_S; |
| |
| return val > MAX_DELAY ? 0 : val * time_step_us; |
| } |
| |
| static void lp872x_set_dvs(struct lp872x *lp, enum lp872x_dvs_sel dvs_sel, |
| struct gpio_desc *gpio) |
| { |
| enum gpiod_flags state; |
| |
| state = dvs_sel == SEL_V1 ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW; |
| gpiod_set_value(gpio, state); |
| lp->dvs_pin = state; |
| } |
| |
| static u8 lp872x_select_buck_vout_addr(struct lp872x *lp, |
| enum lp872x_regulator_id buck) |
| { |
| u8 val, addr; |
| |
| if (lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val)) |
| return 0; |
| |
| switch (buck) { |
| case LP8720_ID_BUCK: |
| if (val & LP8720_EXT_DVS_M) { |
| addr = (lp->dvs_pin == GPIOD_OUT_HIGH) ? |
| LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2; |
| } else { |
| if (lp872x_read_byte(lp, LP8720_ENABLE, &val)) |
| return 0; |
| |
| addr = val & LP8720_DVS_SEL_M ? |
| LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2; |
| } |
| break; |
| case LP8725_ID_BUCK1: |
| if (val & LP8725_DVS1_M) |
| addr = LP8725_BUCK1_VOUT1; |
| else |
| addr = (lp->dvs_pin == GPIOD_OUT_HIGH) ? |
| LP8725_BUCK1_VOUT1 : LP8725_BUCK1_VOUT2; |
| break; |
| case LP8725_ID_BUCK2: |
| addr = val & LP8725_DVS2_M ? |
| LP8725_BUCK2_VOUT1 : LP8725_BUCK2_VOUT2; |
| break; |
| default: |
| return 0; |
| } |
| |
| return addr; |
| } |
| |
| static bool lp872x_is_valid_buck_addr(u8 addr) |
| { |
| switch (addr) { |
| case LP8720_BUCK_VOUT1: |
| case LP8720_BUCK_VOUT2: |
| case LP8725_BUCK1_VOUT1: |
| case LP8725_BUCK1_VOUT2: |
| case LP8725_BUCK2_VOUT1: |
| case LP8725_BUCK2_VOUT2: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static int lp872x_buck_set_voltage_sel(struct regulator_dev *rdev, |
| unsigned selector) |
| { |
| struct lp872x *lp = rdev_get_drvdata(rdev); |
| enum lp872x_regulator_id buck = rdev_get_id(rdev); |
| u8 addr, mask = LP872X_VOUT_M; |
| struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL; |
| |
| if (dvs && dvs->gpio) |
| lp872x_set_dvs(lp, dvs->vsel, dvs->gpio); |
| |
| addr = lp872x_select_buck_vout_addr(lp, buck); |
| if (!lp872x_is_valid_buck_addr(addr)) |
| return -EINVAL; |
| |
| return lp872x_update_bits(lp, addr, mask, selector); |
| } |
| |
| static int lp872x_buck_get_voltage_sel(struct regulator_dev *rdev) |
| { |
| struct lp872x *lp = rdev_get_drvdata(rdev); |
| enum lp872x_regulator_id buck = rdev_get_id(rdev); |
| u8 addr, val; |
| int ret; |
| |
| addr = lp872x_select_buck_vout_addr(lp, buck); |
| if (!lp872x_is_valid_buck_addr(addr)) |
| return -EINVAL; |
| |
| ret = lp872x_read_byte(lp, addr, &val); |
| if (ret) |
| return ret; |
| |
| return val & LP872X_VOUT_M; |
| } |
| |
| static int lp872x_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) |
| { |
| struct lp872x *lp = rdev_get_drvdata(rdev); |
| enum lp872x_regulator_id buck = rdev_get_id(rdev); |
| u8 addr, mask, shift, val; |
| |
| switch (buck) { |
| case LP8720_ID_BUCK: |
| addr = LP8720_BUCK_VOUT2; |
| mask = LP8720_BUCK_FPWM_M; |
| shift = LP8720_BUCK_FPWM_S; |
| break; |
| case LP8725_ID_BUCK1: |
| addr = LP8725_BUCK_CTRL; |
| mask = LP8725_BUCK1_FPWM_M; |
| shift = LP8725_BUCK1_FPWM_S; |
| break; |
| case LP8725_ID_BUCK2: |
| addr = LP8725_BUCK_CTRL; |
| mask = LP8725_BUCK2_FPWM_M; |
| shift = LP8725_BUCK2_FPWM_S; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| if (mode == REGULATOR_MODE_FAST) |
| val = LP872X_FORCE_PWM << shift; |
| else if (mode == REGULATOR_MODE_NORMAL) |
| val = LP872X_AUTO_PWM << shift; |
| else |
| return -EINVAL; |
| |
| return lp872x_update_bits(lp, addr, mask, val); |
| } |
| |
| static unsigned int lp872x_buck_get_mode(struct regulator_dev *rdev) |
| { |
| struct lp872x *lp = rdev_get_drvdata(rdev); |
| enum lp872x_regulator_id buck = rdev_get_id(rdev); |
| u8 addr, mask, val; |
| int ret; |
| |
| switch (buck) { |
| case LP8720_ID_BUCK: |
| addr = LP8720_BUCK_VOUT2; |
| mask = LP8720_BUCK_FPWM_M; |
| break; |
| case LP8725_ID_BUCK1: |
| addr = LP8725_BUCK_CTRL; |
| mask = LP8725_BUCK1_FPWM_M; |
| break; |
| case LP8725_ID_BUCK2: |
| addr = LP8725_BUCK_CTRL; |
| mask = LP8725_BUCK2_FPWM_M; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| ret = lp872x_read_byte(lp, addr, &val); |
| if (ret) |
| return ret; |
| |
| return val & mask ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL; |
| } |
| |
| static const struct regulator_ops lp872x_ldo_ops = { |
| .list_voltage = regulator_list_voltage_table, |
| .map_voltage = regulator_map_voltage_ascend, |
| .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| .enable = regulator_enable_regmap, |
| .disable = regulator_disable_regmap, |
| .is_enabled = regulator_is_enabled_regmap, |
| .enable_time = lp872x_regulator_enable_time, |
| }; |
| |
| static const struct regulator_ops lp8720_buck_ops = { |
| .list_voltage = regulator_list_voltage_table, |
| .map_voltage = regulator_map_voltage_ascend, |
| .set_voltage_sel = lp872x_buck_set_voltage_sel, |
| .get_voltage_sel = lp872x_buck_get_voltage_sel, |
| .enable = regulator_enable_regmap, |
| .disable = regulator_disable_regmap, |
| .is_enabled = regulator_is_enabled_regmap, |
| .enable_time = lp872x_regulator_enable_time, |
| .set_mode = lp872x_buck_set_mode, |
| .get_mode = lp872x_buck_get_mode, |
| }; |
| |
| static const struct regulator_ops lp8725_buck_ops = { |
| .list_voltage = regulator_list_voltage_table, |
| .map_voltage = regulator_map_voltage_ascend, |
| .set_voltage_sel = lp872x_buck_set_voltage_sel, |
| .get_voltage_sel = lp872x_buck_get_voltage_sel, |
| .enable = regulator_enable_regmap, |
| .disable = regulator_disable_regmap, |
| .is_enabled = regulator_is_enabled_regmap, |
| .enable_time = lp872x_regulator_enable_time, |
| .set_mode = lp872x_buck_set_mode, |
| .get_mode = lp872x_buck_get_mode, |
| .set_current_limit = regulator_set_current_limit_regmap, |
| .get_current_limit = regulator_get_current_limit_regmap, |
| }; |
| |
| static const struct regulator_desc lp8720_regulator_desc[] = { |
| { |
| .name = "ldo1", |
| .of_match = of_match_ptr("ldo1"), |
| .id = LP8720_ID_LDO1, |
| .ops = &lp872x_ldo_ops, |
| .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
| .volt_table = lp872x_ldo_vtbl, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| .vsel_reg = LP872X_LDO1_VOUT, |
| .vsel_mask = LP872X_VOUT_M, |
| .enable_reg = LP8720_ENABLE, |
| .enable_mask = LP872X_EN_LDO1_M, |
| }, |
| { |
| .name = "ldo2", |
| .of_match = of_match_ptr("ldo2"), |
| .id = LP8720_ID_LDO2, |
| .ops = &lp872x_ldo_ops, |
| .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
| .volt_table = lp872x_ldo_vtbl, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| .vsel_reg = LP872X_LDO2_VOUT, |
| .vsel_mask = LP872X_VOUT_M, |
| .enable_reg = LP8720_ENABLE, |
| .enable_mask = LP872X_EN_LDO2_M, |
| }, |
| { |
| .name = "ldo3", |
| .of_match = of_match_ptr("ldo3"), |
| .id = LP8720_ID_LDO3, |
| .ops = &lp872x_ldo_ops, |
| .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
| .volt_table = lp872x_ldo_vtbl, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| .vsel_reg = LP872X_LDO3_VOUT, |
| .vsel_mask = LP872X_VOUT_M, |
| .enable_reg = LP8720_ENABLE, |
| .enable_mask = LP872X_EN_LDO3_M, |
| }, |
| { |
| .name = "ldo4", |
| .of_match = of_match_ptr("ldo4"), |
| .id = LP8720_ID_LDO4, |
| .ops = &lp872x_ldo_ops, |
| .n_voltages = ARRAY_SIZE(lp8720_ldo4_vtbl), |
| .volt_table = lp8720_ldo4_vtbl, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| .vsel_reg = LP872X_LDO4_VOUT, |
| .vsel_mask = LP872X_VOUT_M, |
| .enable_reg = LP8720_ENABLE, |
| .enable_mask = LP872X_EN_LDO4_M, |
| }, |
| { |
| .name = "ldo5", |
| .of_match = of_match_ptr("ldo5"), |
| .id = LP8720_ID_LDO5, |
| .ops = &lp872x_ldo_ops, |
| .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
| .volt_table = lp872x_ldo_vtbl, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| .vsel_reg = LP872X_LDO5_VOUT, |
| .vsel_mask = LP872X_VOUT_M, |
| .enable_reg = LP8720_ENABLE, |
| .enable_mask = LP872X_EN_LDO5_M, |
| }, |
| { |
| .name = "buck", |
| .of_match = of_match_ptr("buck"), |
| .id = LP8720_ID_BUCK, |
| .ops = &lp8720_buck_ops, |
| .n_voltages = ARRAY_SIZE(lp8720_buck_vtbl), |
| .volt_table = lp8720_buck_vtbl, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| .enable_reg = LP8720_ENABLE, |
| .enable_mask = LP8720_EN_BUCK_M, |
| }, |
| }; |
| |
| static const struct regulator_desc lp8725_regulator_desc[] = { |
| { |
| .name = "ldo1", |
| .of_match = of_match_ptr("ldo1"), |
| .id = LP8725_ID_LDO1, |
| .ops = &lp872x_ldo_ops, |
| .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
| .volt_table = lp872x_ldo_vtbl, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| .vsel_reg = LP872X_LDO1_VOUT, |
| .vsel_mask = LP872X_VOUT_M, |
| .enable_reg = LP8725_LDO_CTRL, |
| .enable_mask = LP872X_EN_LDO1_M, |
| }, |
| { |
| .name = "ldo2", |
| .of_match = of_match_ptr("ldo2"), |
| .id = LP8725_ID_LDO2, |
| .ops = &lp872x_ldo_ops, |
| .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
| .volt_table = lp872x_ldo_vtbl, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| .vsel_reg = LP872X_LDO2_VOUT, |
| .vsel_mask = LP872X_VOUT_M, |
| .enable_reg = LP8725_LDO_CTRL, |
| .enable_mask = LP872X_EN_LDO2_M, |
| }, |
| { |
| .name = "ldo3", |
| .of_match = of_match_ptr("ldo3"), |
| .id = LP8725_ID_LDO3, |
| .ops = &lp872x_ldo_ops, |
| .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
| .volt_table = lp872x_ldo_vtbl, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| .vsel_reg = LP872X_LDO3_VOUT, |
| .vsel_mask = LP872X_VOUT_M, |
| .enable_reg = LP8725_LDO_CTRL, |
| .enable_mask = LP872X_EN_LDO3_M, |
| }, |
| { |
| .name = "ldo4", |
| .of_match = of_match_ptr("ldo4"), |
| .id = LP8725_ID_LDO4, |
| .ops = &lp872x_ldo_ops, |
| .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
| .volt_table = lp872x_ldo_vtbl, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| .vsel_reg = LP872X_LDO4_VOUT, |
| .vsel_mask = LP872X_VOUT_M, |
| .enable_reg = LP8725_LDO_CTRL, |
| .enable_mask = LP872X_EN_LDO4_M, |
| }, |
| { |
| .name = "ldo5", |
| .of_match = of_match_ptr("ldo5"), |
| .id = LP8725_ID_LDO5, |
| .ops = &lp872x_ldo_ops, |
| .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
| .volt_table = lp872x_ldo_vtbl, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| .vsel_reg = LP872X_LDO5_VOUT, |
| .vsel_mask = LP872X_VOUT_M, |
| .enable_reg = LP8725_LDO_CTRL, |
| .enable_mask = LP872X_EN_LDO5_M, |
| }, |
| { |
| .name = "lilo1", |
| .of_match = of_match_ptr("lilo1"), |
| .id = LP8725_ID_LILO1, |
| .ops = &lp872x_ldo_ops, |
| .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl), |
| .volt_table = lp8725_lilo_vtbl, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| .vsel_reg = LP8725_LILO1_VOUT, |
| .vsel_mask = LP872X_VOUT_M, |
| .enable_reg = LP8725_LDO_CTRL, |
| .enable_mask = LP8725_EN_LILO1_M, |
| }, |
| { |
| .name = "lilo2", |
| .of_match = of_match_ptr("lilo2"), |
| .id = LP8725_ID_LILO2, |
| .ops = &lp872x_ldo_ops, |
| .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl), |
| .volt_table = lp8725_lilo_vtbl, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| .vsel_reg = LP8725_LILO2_VOUT, |
| .vsel_mask = LP872X_VOUT_M, |
| .enable_reg = LP8725_LDO_CTRL, |
| .enable_mask = LP8725_EN_LILO2_M, |
| }, |
| { |
| .name = "buck1", |
| .of_match = of_match_ptr("buck1"), |
| .id = LP8725_ID_BUCK1, |
| .ops = &lp8725_buck_ops, |
| .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl), |
| .volt_table = lp8725_buck_vtbl, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| .enable_reg = LP872X_GENERAL_CFG, |
| .enable_mask = LP8725_BUCK1_EN_M, |
| .curr_table = lp8725_buck_uA, |
| .n_current_limits = ARRAY_SIZE(lp8725_buck_uA), |
| .csel_reg = LP8725_BUCK1_VOUT2, |
| .csel_mask = LP8725_BUCK_CL_M, |
| }, |
| { |
| .name = "buck2", |
| .of_match = of_match_ptr("buck2"), |
| .id = LP8725_ID_BUCK2, |
| .ops = &lp8725_buck_ops, |
| .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl), |
| .volt_table = lp8725_buck_vtbl, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| .enable_reg = LP872X_GENERAL_CFG, |
| .enable_mask = LP8725_BUCK2_EN_M, |
| .curr_table = lp8725_buck_uA, |
| .n_current_limits = ARRAY_SIZE(lp8725_buck_uA), |
| .csel_reg = LP8725_BUCK2_VOUT2, |
| .csel_mask = LP8725_BUCK_CL_M, |
| }, |
| }; |
| |
| static int lp872x_init_dvs(struct lp872x *lp) |
| { |
| struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL; |
| enum gpiod_flags pinstate; |
| u8 mask[] = { LP8720_EXT_DVS_M, LP8725_DVS1_M | LP8725_DVS2_M }; |
| u8 default_dvs_mode[] = { LP8720_DEFAULT_DVS, LP8725_DEFAULT_DVS }; |
| |
| if (!dvs) |
| goto set_default_dvs_mode; |
| |
| if (!dvs->gpio) |
| goto set_default_dvs_mode; |
| |
| pinstate = dvs->init_state; |
| dvs->gpio = devm_gpiod_get_optional(lp->dev, "ti,dvs", pinstate); |
| |
| if (IS_ERR(dvs->gpio)) { |
| dev_err(lp->dev, "gpio request err: %ld\n", PTR_ERR(dvs->gpio)); |
| return PTR_ERR(dvs->gpio); |
| } |
| |
| lp->dvs_pin = pinstate; |
| |
| return 0; |
| |
| set_default_dvs_mode: |
| return lp872x_update_bits(lp, LP872X_GENERAL_CFG, mask[lp->chipid], |
| default_dvs_mode[lp->chipid]); |
| } |
| |
| static int lp872x_hw_enable(struct lp872x *lp) |
| { |
| if (!lp->pdata) |
| return -EINVAL; |
| |
| if (!lp->pdata->enable_gpio) |
| return 0; |
| |
| /* Always set enable GPIO high. */ |
| lp->pdata->enable_gpio = devm_gpiod_get_optional(lp->dev, "enable", GPIOD_OUT_HIGH); |
| if (IS_ERR(lp->pdata->enable_gpio)) { |
| dev_err(lp->dev, "gpio request err: %ld\n", PTR_ERR(lp->pdata->enable_gpio)); |
| return PTR_ERR(lp->pdata->enable_gpio); |
| } |
| |
| /* Each chip has a different enable delay. */ |
| if (lp->chipid == LP8720) |
| usleep_range(LP8720_ENABLE_DELAY, 1.5 * LP8720_ENABLE_DELAY); |
| else |
| usleep_range(LP8725_ENABLE_DELAY, 1.5 * LP8725_ENABLE_DELAY); |
| |
| return 0; |
| } |
| |
| static int lp872x_config(struct lp872x *lp) |
| { |
| struct lp872x_platform_data *pdata = lp->pdata; |
| int ret; |
| |
| if (!pdata || !pdata->update_config) |
| goto init_dvs; |
| |
| ret = lp872x_write_byte(lp, LP872X_GENERAL_CFG, pdata->general_config); |
| if (ret) |
| return ret; |
| |
| init_dvs: |
| return lp872x_init_dvs(lp); |
| } |
| |
| static struct regulator_init_data |
| *lp872x_find_regulator_init_data(int id, struct lp872x *lp) |
| { |
| struct lp872x_platform_data *pdata = lp->pdata; |
| int i; |
| |
| if (!pdata) |
| return NULL; |
| |
| for (i = 0; i < lp->num_regulators; i++) { |
| if (pdata->regulator_data[i].id == id) |
| return pdata->regulator_data[i].init_data; |
| } |
| |
| return NULL; |
| } |
| |
| static int lp872x_regulator_register(struct lp872x *lp) |
| { |
| const struct regulator_desc *desc; |
| struct regulator_config cfg = { }; |
| struct regulator_dev *rdev; |
| int i; |
| |
| for (i = 0; i < lp->num_regulators; i++) { |
| desc = (lp->chipid == LP8720) ? &lp8720_regulator_desc[i] : |
| &lp8725_regulator_desc[i]; |
| |
| cfg.dev = lp->dev; |
| cfg.init_data = lp872x_find_regulator_init_data(desc->id, lp); |
| cfg.driver_data = lp; |
| cfg.regmap = lp->regmap; |
| |
| rdev = devm_regulator_register(lp->dev, desc, &cfg); |
| if (IS_ERR(rdev)) { |
| dev_err(lp->dev, "regulator register err"); |
| return PTR_ERR(rdev); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static const struct regmap_config lp872x_regmap_config = { |
| .reg_bits = 8, |
| .val_bits = 8, |
| .max_register = MAX_REGISTERS, |
| }; |
| |
| #ifdef CONFIG_OF |
| |
| #define LP872X_VALID_OPMODE (REGULATOR_MODE_FAST | REGULATOR_MODE_NORMAL) |
| |
| static struct of_regulator_match lp8720_matches[] = { |
| { .name = "ldo1", .driver_data = (void *)LP8720_ID_LDO1, }, |
| { .name = "ldo2", .driver_data = (void *)LP8720_ID_LDO2, }, |
| { .name = "ldo3", .driver_data = (void *)LP8720_ID_LDO3, }, |
| { .name = "ldo4", .driver_data = (void *)LP8720_ID_LDO4, }, |
| { .name = "ldo5", .driver_data = (void *)LP8720_ID_LDO5, }, |
| { .name = "buck", .driver_data = (void *)LP8720_ID_BUCK, }, |
| }; |
| |
| static struct of_regulator_match lp8725_matches[] = { |
| { .name = "ldo1", .driver_data = (void *)LP8725_ID_LDO1, }, |
| { .name = "ldo2", .driver_data = (void *)LP8725_ID_LDO2, }, |
| { .name = "ldo3", .driver_data = (void *)LP8725_ID_LDO3, }, |
| { .name = "ldo4", .driver_data = (void *)LP8725_ID_LDO4, }, |
| { .name = "ldo5", .driver_data = (void *)LP8725_ID_LDO5, }, |
| { .name = "lilo1", .driver_data = (void *)LP8725_ID_LILO1, }, |
| { .name = "lilo2", .driver_data = (void *)LP8725_ID_LILO2, }, |
| { .name = "buck1", .driver_data = (void *)LP8725_ID_BUCK1, }, |
| { .name = "buck2", .driver_data = (void *)LP8725_ID_BUCK2, }, |
| }; |
| |
| static struct lp872x_platform_data |
| *lp872x_populate_pdata_from_dt(struct device *dev, enum lp872x_id which) |
| { |
| struct device_node *np = dev->of_node; |
| struct lp872x_platform_data *pdata; |
| struct of_regulator_match *match; |
| int num_matches; |
| int count; |
| int i; |
| u8 dvs_state; |
| |
| pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); |
| if (!pdata) |
| return ERR_PTR(-ENOMEM); |
| |
| of_property_read_u8(np, "ti,general-config", &pdata->general_config); |
| if (of_find_property(np, "ti,update-config", NULL)) |
| pdata->update_config = true; |
| |
| pdata->dvs = devm_kzalloc(dev, sizeof(struct lp872x_dvs), GFP_KERNEL); |
| if (!pdata->dvs) |
| return ERR_PTR(-ENOMEM); |
| |
| of_property_read_u8(np, "ti,dvs-vsel", (u8 *)&pdata->dvs->vsel); |
| of_property_read_u8(np, "ti,dvs-state", &dvs_state); |
| pdata->dvs->init_state = dvs_state ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW; |
| |
| if (of_get_child_count(np) == 0) |
| goto out; |
| |
| switch (which) { |
| case LP8720: |
| match = lp8720_matches; |
| num_matches = ARRAY_SIZE(lp8720_matches); |
| break; |
| case LP8725: |
| match = lp8725_matches; |
| num_matches = ARRAY_SIZE(lp8725_matches); |
| break; |
| default: |
| goto out; |
| } |
| |
| count = of_regulator_match(dev, np, match, num_matches); |
| if (count <= 0) |
| goto out; |
| |
| for (i = 0; i < num_matches; i++) { |
| pdata->regulator_data[i].id = |
| (enum lp872x_regulator_id)match[i].driver_data; |
| pdata->regulator_data[i].init_data = match[i].init_data; |
| } |
| out: |
| return pdata; |
| } |
| #else |
| static struct lp872x_platform_data |
| *lp872x_populate_pdata_from_dt(struct device *dev, enum lp872x_id which) |
| { |
| return NULL; |
| } |
| #endif |
| |
| static int lp872x_probe(struct i2c_client *cl) |
| { |
| const struct i2c_device_id *id = i2c_client_get_device_id(cl); |
| struct lp872x *lp; |
| struct lp872x_platform_data *pdata; |
| int ret; |
| static const int lp872x_num_regulators[] = { |
| [LP8720] = LP8720_NUM_REGULATORS, |
| [LP8725] = LP8725_NUM_REGULATORS, |
| }; |
| |
| if (cl->dev.of_node) { |
| pdata = lp872x_populate_pdata_from_dt(&cl->dev, |
| (enum lp872x_id)id->driver_data); |
| if (IS_ERR(pdata)) |
| return PTR_ERR(pdata); |
| } else { |
| pdata = dev_get_platdata(&cl->dev); |
| } |
| |
| lp = devm_kzalloc(&cl->dev, sizeof(struct lp872x), GFP_KERNEL); |
| if (!lp) |
| return -ENOMEM; |
| |
| lp->num_regulators = lp872x_num_regulators[id->driver_data]; |
| |
| lp->regmap = devm_regmap_init_i2c(cl, &lp872x_regmap_config); |
| if (IS_ERR(lp->regmap)) { |
| ret = PTR_ERR(lp->regmap); |
| dev_err(&cl->dev, "regmap init i2c err: %d\n", ret); |
| return ret; |
| } |
| |
| lp->dev = &cl->dev; |
| lp->pdata = pdata; |
| lp->chipid = id->driver_data; |
| i2c_set_clientdata(cl, lp); |
| |
| ret = lp872x_hw_enable(lp); |
| if (ret) |
| return ret; |
| |
| ret = lp872x_config(lp); |
| if (ret) |
| return ret; |
| |
| return lp872x_regulator_register(lp); |
| } |
| |
| static const struct of_device_id lp872x_dt_ids[] = { |
| { .compatible = "ti,lp8720", }, |
| { .compatible = "ti,lp8725", }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(of, lp872x_dt_ids); |
| |
| static const struct i2c_device_id lp872x_ids[] = { |
| {"lp8720", LP8720}, |
| {"lp8725", LP8725}, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(i2c, lp872x_ids); |
| |
| static struct i2c_driver lp872x_driver = { |
| .driver = { |
| .name = "lp872x", |
| .of_match_table = of_match_ptr(lp872x_dt_ids), |
| }, |
| .probe_new = lp872x_probe, |
| .id_table = lp872x_ids, |
| }; |
| |
| module_i2c_driver(lp872x_driver); |
| |
| MODULE_DESCRIPTION("TI/National Semiconductor LP872x PMU Regulator Driver"); |
| MODULE_AUTHOR("Milo Kim"); |
| MODULE_LICENSE("GPL"); |
