mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
![Paul Kocialkowski](/assets/img/avatar_default.png)
LP872x regulators are made active via the EN pin, which might be hooked to a GPIO. This adds support for driving the GPIO high when the driver is in use. Signed-off-by: Paul Kocialkowski <contact@paulk.fr> Signed-off-by: Mark Brown <broonie@kernel.org>
1019 lines
26 KiB
C
1019 lines
26 KiB
C
/*
|
|
* Copyright 2012 Texas Instruments
|
|
*
|
|
* Author: Milo(Woogyom) Kim <milo.kim@ti.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
*/
|
|
|
|
#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 lp8725_buck_set_current_limit(struct regulator_dev *rdev,
|
|
int min_uA, int max_uA)
|
|
{
|
|
struct lp872x *lp = rdev_get_drvdata(rdev);
|
|
enum lp872x_regulator_id buck = rdev_get_id(rdev);
|
|
int i;
|
|
u8 addr;
|
|
|
|
switch (buck) {
|
|
case LP8725_ID_BUCK1:
|
|
addr = LP8725_BUCK1_VOUT2;
|
|
break;
|
|
case LP8725_ID_BUCK2:
|
|
addr = LP8725_BUCK2_VOUT2;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (i = ARRAY_SIZE(lp8725_buck_uA) - 1; i >= 0; i--) {
|
|
if (lp8725_buck_uA[i] >= min_uA &&
|
|
lp8725_buck_uA[i] <= max_uA)
|
|
return lp872x_update_bits(lp, addr,
|
|
LP8725_BUCK_CL_M,
|
|
i << LP8725_BUCK_CL_S);
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int lp8725_buck_get_current_limit(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;
|
|
|
|
switch (buck) {
|
|
case LP8725_ID_BUCK1:
|
|
addr = LP8725_BUCK1_VOUT2;
|
|
break;
|
|
case LP8725_ID_BUCK2:
|
|
addr = LP8725_BUCK2_VOUT2;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = lp872x_read_byte(lp, addr, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
val = (val & LP8725_BUCK_CL_M) >> LP8725_BUCK_CL_S;
|
|
|
|
return (val < ARRAY_SIZE(lp8725_buck_uA)) ?
|
|
lp8725_buck_uA[val] : -EINVAL;
|
|
}
|
|
|
|
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 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 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 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 = lp8725_buck_set_current_limit,
|
|
.get_current_limit = lp8725_buck_get_current_limit,
|
|
};
|
|
|
|
static 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 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,
|
|
},
|
|
{
|
|
.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,
|
|
},
|
|
};
|
|
|
|
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)
|
|
{
|
|
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;
|
|
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");
|