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kernel-ark/drivers/regulator/lp872x.c
Axel Lin 5bae062830 regulator: lp872x: Simplify implementation of lp872x_find_regulator_init_data() 
Pass regulator id rahter than the index to lp872x_find_regulator_init_data(),
then the code can be simpler.
We can also get max_regulators by lp->num_regulators.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Tested-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-07-16 20:58:30 +01:00

944 lines
23 KiB
C
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/*
* 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/regulator/lp872x.h>
#include <linux/regulator/driver.h>
#include <linux/platform_device.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
/* 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;
struct regulator_dev **regulators;
int num_regulators;
enum lp872x_dvs_state dvs_pin;
int dvs_gpio;
};
/* 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 _rdev_to_offset(struct regulator_dev *rdev)
{
enum lp872x_regulator_id id = rdev_get_id(rdev);
switch (id) {
case LP8720_ID_LDO1 ... LP8720_ID_BUCK:
return id;
case LP8725_ID_LDO1 ... LP8725_ID_BUCK2:
return id - LP8725_ID_BASE;
default:
return -EINVAL;
}
}
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 -EINVAL;
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 regulator = rdev_get_id(rdev);
int time_step_us = lp872x_get_timestep_usec(lp);
int ret, offset;
u8 addr, val;
if (time_step_us < 0)
return -EINVAL;
switch (regulator) {
case LP8720_ID_LDO1 ... LP8720_ID_LDO5:
case LP8725_ID_LDO1 ... LP8725_ID_LILO2:
offset = _rdev_to_offset(rdev);
if (offset < 0)
return -EINVAL;
addr = LP872X_LDO1_VOUT + offset;
break;
case LP8720_ID_BUCK:
addr = LP8720_BUCK_VOUT1;
break;
case LP8725_ID_BUCK1:
addr = LP8725_BUCK1_VOUT1;
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, int gpio)
{
enum lp872x_dvs_sel dvs_sel = lp->pdata->dvs->vsel;
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->dvs;
if (dvs && gpio_is_valid(dvs->gpio))
lp872x_set_dvs(lp, 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, max = ARRAY_SIZE(lp8725_buck_uA);
u8 addr, val;
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 = 0 ; i < max ; i++)
if (lp8725_buck_uA[i] >= min_uA &&
lp8725_buck_uA[i] <= max_uA)
break;
if (i == max)
return -EINVAL;
val = i << LP8725_BUCK_CL_S;
return lp872x_update_bits(lp, addr, LP8725_BUCK_CL_M, val);
}
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,
.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,
.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,
.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",
.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",
.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",
.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",
.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",
.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",
.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",
.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",
.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",
.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",
.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",
.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",
.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",
.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",
.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",
.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_check_dvs_validity(struct lp872x *lp)
{
struct lp872x_dvs *dvs = lp->pdata->dvs;
u8 val = 0;
int ret;
ret = lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val);
if (ret)
return ret;
ret = 0;
if (lp->chipid == LP8720) {
if (val & LP8720_EXT_DVS_M)
ret = dvs ? 0 : -EINVAL;
} else {
if ((val & LP8725_DVS1_M) == EXTERN_DVS_USED)
ret = dvs ? 0 : -EINVAL;
}
return ret;
}
static int lp872x_init_dvs(struct lp872x *lp)
{
int ret, gpio;
struct lp872x_dvs *dvs = lp->pdata->dvs;
enum lp872x_dvs_state pinstate;
ret = lp872x_check_dvs_validity(lp);
if (ret) {
dev_warn(lp->dev, "invalid dvs data: %d\n", ret);
return ret;
}
gpio = dvs->gpio;
if (!gpio_is_valid(gpio)) {
dev_err(lp->dev, "invalid gpio: %d\n", gpio);
return -EINVAL;
}
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;
lp->dvs_gpio = gpio;
return 0;
}
static int lp872x_config(struct lp872x *lp)
{
struct lp872x_platform_data *pdata = lp->pdata;
int ret;
if (!pdata->update_config)
return 0;
ret = lp872x_write_byte(lp, LP872X_GENERAL_CFG, pdata->general_config);
if (ret)
return ret;
return lp872x_init_dvs(lp);
}
static struct regulator_init_data
*lp872x_find_regulator_init_data(int id, struct lp872x *lp)
{
int i;
for (i = 0; i < lp->num_regulators; i++) {
if (lp->pdata->regulator_data[i].id == id)
return lp->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, ret;
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 = regulator_register(desc, &cfg);
if (IS_ERR(rdev)) {
dev_err(lp->dev, "regulator register err");
ret = PTR_ERR(rdev);
goto err;
}
*(lp->regulators + i) = rdev;
}
return 0;
err:
while (--i >= 0) {
rdev = *(lp->regulators + i);
regulator_unregister(rdev);
}
return ret;
}
static void lp872x_regulator_unregister(struct lp872x *lp)
{
struct regulator_dev *rdev;
int i;
for (i = 0 ; i < lp->num_regulators ; i++) {
rdev = *(lp->regulators + i);
regulator_unregister(rdev);
}
}
static const struct regmap_config lp872x_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MAX_REGISTERS,
};
static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id)
{
struct lp872x *lp;
struct lp872x_platform_data *pdata = cl->dev.platform_data;
int ret, size, num_regulators;
const int lp872x_num_regulators[] = {
[LP8720] = LP8720_NUM_REGULATORS,
[LP8725] = LP8725_NUM_REGULATORS,
};
if (!pdata) {
dev_err(&cl->dev, "no platform data\n");
return -EINVAL;
}
lp = devm_kzalloc(&cl->dev, sizeof(struct lp872x), GFP_KERNEL);
if (!lp)
goto err_mem;
num_regulators = lp872x_num_regulators[id->driver_data];
size = sizeof(struct regulator_dev *) * num_regulators;
lp->regulators = devm_kzalloc(&cl->dev, size, GFP_KERNEL);
if (!lp->regulators)
goto err_mem;
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);
goto err_dev;
}
lp->dev = &cl->dev;
lp->pdata = pdata;
lp->chipid = id->driver_data;
lp->num_regulators = num_regulators;
i2c_set_clientdata(cl, lp);
ret = lp872x_config(lp);
if (ret)
goto err_dev;
return lp872x_regulator_register(lp);
err_mem:
return -ENOMEM;
err_dev:
return ret;
}
static int __devexit lp872x_remove(struct i2c_client *cl)
{
struct lp872x *lp = i2c_get_clientdata(cl);
lp872x_regulator_unregister(lp);
return 0;
}
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",
.owner = THIS_MODULE,
},
.probe = lp872x_probe,
.remove = __devexit_p(lp872x_remove),
.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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