forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
965 lines
25 KiB
965 lines
25 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* Copyright 2012 Texas Instruments |
|
* |
|
* Author: Milo(Woogyom) Kim <[email protected]> |
|
*/ |
|
|
|
#include <linux/module.h> |
|
#include <linux/slab.h> |
|
#include <linux/i2c.h> |
|
#include <linux/regmap.h> |
|
#include <linux/err.h> |
|
#include <linux/gpio.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/of_gpio.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 lp872x_dvs_state 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, |
|
int gpio) |
|
{ |
|
enum lp872x_dvs_state state; |
|
|
|
state = dvs_sel == SEL_V1 ? DVS_HIGH : DVS_LOW; |
|
gpio_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 == DVS_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 == DVS_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 && gpio_is_valid(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) |
|
{ |
|
int ret, gpio; |
|
struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL; |
|
enum lp872x_dvs_state 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; |
|
|
|
gpio = dvs->gpio; |
|
if (!gpio_is_valid(gpio)) |
|
goto set_default_dvs_mode; |
|
|
|
pinstate = dvs->init_state; |
|
ret = devm_gpio_request_one(lp->dev, gpio, pinstate, "LP872X DVS"); |
|
if (ret) { |
|
dev_err(lp->dev, "gpio request err: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
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) |
|
{ |
|
int ret, gpio; |
|
|
|
if (!lp->pdata) |
|
return -EINVAL; |
|
|
|
gpio = lp->pdata->enable_gpio; |
|
if (!gpio_is_valid(gpio)) |
|
return 0; |
|
|
|
/* Always set enable GPIO high. */ |
|
ret = devm_gpio_request_one(lp->dev, gpio, GPIOF_OUT_INIT_HIGH, "LP872X EN"); |
|
if (ret) { |
|
dev_err(lp->dev, "gpio request err: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
/* 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); |
|
|
|
pdata->dvs->gpio = of_get_named_gpio(np, "ti,dvs-gpio", 0); |
|
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 ? DVS_HIGH : DVS_LOW; |
|
|
|
pdata->enable_gpio = of_get_named_gpio(np, "enable-gpios", 0); |
|
|
|
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) |
|
{ |
|
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 = 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");
|
|
|