| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Kim (Woogyom) Milo | 4211 | 90.66% | 8 | 27.59% |
| Paul Kocialkowski | 217 | 4.67% | 2 | 6.90% |
| Axel Lin | 104 | 2.24% | 6 | 20.69% |
| Maíra Canal | 67 | 1.44% | 1 | 3.45% |
| Jingoo Han | 11 | 0.24% | 2 | 6.90% |
| Nathan Chancellor | 9 | 0.19% | 1 | 3.45% |
| Uwe Kleine-König | 9 | 0.19% | 2 | 6.90% |
| Doug Anderson | 5 | 0.11% | 1 | 3.45% |
| Rob Herring | 5 | 0.11% | 1 | 3.45% |
| Krzysztof Kozlowski | 2 | 0.04% | 2 | 6.90% |
| Thomas Gleixner | 2 | 0.04% | 1 | 3.45% |
| Sachin Kamat | 2 | 0.04% | 1 | 3.45% |
| Colin Ian King | 1 | 0.02% | 1 | 3.45% |
| Total | 4645 | 29 |
// 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); pdata->update_config = of_property_read_bool(np, "ti,update-config"); 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 = (uintptr_t)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[] __maybe_unused = { { .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", .probe_type = PROBE_PREFER_ASYNCHRONOUS, .of_match_table = of_match_ptr(lp872x_dt_ids), }, .probe = 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");
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