mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 01:46:40 +07:00
3a93f2a9f4
Change the interface used by set_voltage() to report the selected value to the regulator core in terms of a selector used by list_voltage(). This allows the regulator core to know the voltage that was chosen without having to do an explict get_voltage(), which would be much more expensive as it will generally access hardware. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
667 lines
16 KiB
C
667 lines
16 KiB
C
/*
|
|
* Regulator driver for National Semiconductors LP3972 PMIC chip
|
|
*
|
|
* Based on lp3971.c
|
|
*
|
|
* 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/bug.h>
|
|
#include <linux/err.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/regulator/driver.h>
|
|
#include <linux/regulator/lp3972.h>
|
|
#include <linux/slab.h>
|
|
|
|
struct lp3972 {
|
|
struct device *dev;
|
|
struct mutex io_lock;
|
|
struct i2c_client *i2c;
|
|
int num_regulators;
|
|
struct regulator_dev **rdev;
|
|
};
|
|
|
|
/* LP3972 Control Registers */
|
|
#define LP3972_SCR_REG 0x07
|
|
#define LP3972_OVER1_REG 0x10
|
|
#define LP3972_OVSR1_REG 0x11
|
|
#define LP3972_OVER2_REG 0x12
|
|
#define LP3972_OVSR2_REG 0x13
|
|
#define LP3972_VCC1_REG 0x20
|
|
#define LP3972_ADTV1_REG 0x23
|
|
#define LP3972_ADTV2_REG 0x24
|
|
#define LP3972_AVRC_REG 0x25
|
|
#define LP3972_CDTC1_REG 0x26
|
|
#define LP3972_CDTC2_REG 0x27
|
|
#define LP3972_SDTV1_REG 0x29
|
|
#define LP3972_SDTV2_REG 0x2A
|
|
#define LP3972_MDTV1_REG 0x32
|
|
#define LP3972_MDTV2_REG 0x33
|
|
#define LP3972_L2VCR_REG 0x39
|
|
#define LP3972_L34VCR_REG 0x3A
|
|
#define LP3972_SCR1_REG 0x80
|
|
#define LP3972_SCR2_REG 0x81
|
|
#define LP3972_OEN3_REG 0x82
|
|
#define LP3972_OSR3_REG 0x83
|
|
#define LP3972_LOER4_REG 0x84
|
|
#define LP3972_B2TV_REG 0x85
|
|
#define LP3972_B3TV_REG 0x86
|
|
#define LP3972_B32RC_REG 0x87
|
|
#define LP3972_ISRA_REG 0x88
|
|
#define LP3972_BCCR_REG 0x89
|
|
#define LP3972_II1RR_REG 0x8E
|
|
#define LP3972_II2RR_REG 0x8F
|
|
|
|
#define LP3972_SYS_CONTROL1_REG LP3972_SCR1_REG
|
|
/* System control register 1 initial value,
|
|
* bits 5, 6 and 7 are EPROM programmable */
|
|
#define SYS_CONTROL1_INIT_VAL 0x02
|
|
#define SYS_CONTROL1_INIT_MASK 0x1F
|
|
|
|
#define LP3972_VOL_CHANGE_REG LP3972_VCC1_REG
|
|
#define LP3972_VOL_CHANGE_FLAG_GO 0x01
|
|
#define LP3972_VOL_CHANGE_FLAG_MASK 0x03
|
|
|
|
/* LDO output enable mask */
|
|
#define LP3972_OEN3_L1EN BIT(0)
|
|
#define LP3972_OVER2_LDO2_EN BIT(2)
|
|
#define LP3972_OVER2_LDO3_EN BIT(3)
|
|
#define LP3972_OVER2_LDO4_EN BIT(4)
|
|
#define LP3972_OVER1_S_EN BIT(2)
|
|
|
|
static const int ldo1_voltage_map[] = {
|
|
1700, 1725, 1750, 1775, 1800, 1825, 1850, 1875,
|
|
1900, 1925, 1950, 1975, 2000,
|
|
};
|
|
|
|
static const int ldo23_voltage_map[] = {
|
|
1800, 1900, 2000, 2100, 2200, 2300, 2400, 2500,
|
|
2600, 2700, 2800, 2900, 3000, 3100, 3200, 3300,
|
|
};
|
|
|
|
static const int ldo4_voltage_map[] = {
|
|
1000, 1050, 1100, 1150, 1200, 1250, 1300, 1350,
|
|
1400, 1500, 1800, 1900, 2500, 2800, 3000, 3300,
|
|
};
|
|
|
|
static const int ldo5_voltage_map[] = {
|
|
0, 0, 0, 0, 0, 850, 875, 900,
|
|
925, 950, 975, 1000, 1025, 1050, 1075, 1100,
|
|
1125, 1150, 1175, 1200, 1225, 1250, 1275, 1300,
|
|
1325, 1350, 1375, 1400, 1425, 1450, 1475, 1500,
|
|
};
|
|
|
|
static const int buck1_voltage_map[] = {
|
|
725, 750, 775, 800, 825, 850, 875, 900,
|
|
925, 950, 975, 1000, 1025, 1050, 1075, 1100,
|
|
1125, 1150, 1175, 1200, 1225, 1250, 1275, 1300,
|
|
1325, 1350, 1375, 1400, 1425, 1450, 1475, 1500,
|
|
};
|
|
|
|
static const int buck23_voltage_map[] = {
|
|
0, 800, 850, 900, 950, 1000, 1050, 1100,
|
|
1150, 1200, 1250, 1300, 1350, 1400, 1450, 1500,
|
|
1550, 1600, 1650, 1700, 1800, 1900, 2500, 2800,
|
|
3000, 3300,
|
|
};
|
|
|
|
static const int *ldo_voltage_map[] = {
|
|
ldo1_voltage_map,
|
|
ldo23_voltage_map,
|
|
ldo23_voltage_map,
|
|
ldo4_voltage_map,
|
|
ldo5_voltage_map,
|
|
};
|
|
|
|
static const int *buck_voltage_map[] = {
|
|
buck1_voltage_map,
|
|
buck23_voltage_map,
|
|
buck23_voltage_map,
|
|
};
|
|
|
|
static const int ldo_output_enable_mask[] = {
|
|
LP3972_OEN3_L1EN,
|
|
LP3972_OVER2_LDO2_EN,
|
|
LP3972_OVER2_LDO3_EN,
|
|
LP3972_OVER2_LDO4_EN,
|
|
LP3972_OVER1_S_EN,
|
|
};
|
|
|
|
static const int ldo_output_enable_addr[] = {
|
|
LP3972_OEN3_REG,
|
|
LP3972_OVER2_REG,
|
|
LP3972_OVER2_REG,
|
|
LP3972_OVER2_REG,
|
|
LP3972_OVER1_REG,
|
|
};
|
|
|
|
static const int ldo_vol_ctl_addr[] = {
|
|
LP3972_MDTV1_REG,
|
|
LP3972_L2VCR_REG,
|
|
LP3972_L34VCR_REG,
|
|
LP3972_L34VCR_REG,
|
|
LP3972_SDTV1_REG,
|
|
};
|
|
|
|
static const int buck_vol_enable_addr[] = {
|
|
LP3972_OVER1_REG,
|
|
LP3972_OEN3_REG,
|
|
LP3972_OEN3_REG,
|
|
};
|
|
|
|
static const int buck_base_addr[] = {
|
|
LP3972_ADTV1_REG,
|
|
LP3972_B2TV_REG,
|
|
LP3972_B3TV_REG,
|
|
};
|
|
|
|
#define LP3972_LDO_VOL_VALUE_MAP(x) (ldo_voltage_map[x])
|
|
#define LP3972_LDO_OUTPUT_ENABLE_MASK(x) (ldo_output_enable_mask[x])
|
|
#define LP3972_LDO_OUTPUT_ENABLE_REG(x) (ldo_output_enable_addr[x])
|
|
|
|
/* LDO voltage control registers shift:
|
|
LP3972_LDO1 -> 0, LP3972_LDO2 -> 4
|
|
LP3972_LDO3 -> 0, LP3972_LDO4 -> 4
|
|
LP3972_LDO5 -> 0
|
|
*/
|
|
#define LP3972_LDO_VOL_CONTR_SHIFT(x) (((x) & 1) << 2)
|
|
#define LP3972_LDO_VOL_CONTR_REG(x) (ldo_vol_ctl_addr[x])
|
|
#define LP3972_LDO_VOL_CHANGE_SHIFT(x) ((x) ? 4 : 6)
|
|
|
|
#define LP3972_LDO_VOL_MASK(x) (((x) % 4) ? 0x0f : 0x1f)
|
|
#define LP3972_LDO_VOL_MIN_IDX(x) (((x) == 4) ? 0x05 : 0x00)
|
|
#define LP3972_LDO_VOL_MAX_IDX(x) ((x) ? (((x) == 4) ? 0x1f : 0x0f) : 0x0c)
|
|
|
|
#define LP3972_BUCK_VOL_VALUE_MAP(x) (buck_voltage_map[x])
|
|
#define LP3972_BUCK_VOL_ENABLE_REG(x) (buck_vol_enable_addr[x])
|
|
#define LP3972_BUCK_VOL1_REG(x) (buck_base_addr[x])
|
|
#define LP3972_BUCK_VOL_MASK 0x1f
|
|
#define LP3972_BUCK_VOL_MIN_IDX(x) ((x) ? 0x01 : 0x00)
|
|
#define LP3972_BUCK_VOL_MAX_IDX(x) ((x) ? 0x19 : 0x1f)
|
|
|
|
static int lp3972_i2c_read(struct i2c_client *i2c, char reg, int count,
|
|
u16 *dest)
|
|
{
|
|
int ret;
|
|
|
|
if (count != 1)
|
|
return -EIO;
|
|
ret = i2c_smbus_read_byte_data(i2c, reg);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
*dest = ret;
|
|
return 0;
|
|
}
|
|
|
|
static int lp3972_i2c_write(struct i2c_client *i2c, char reg, int count,
|
|
const u16 *src)
|
|
{
|
|
if (count != 1)
|
|
return -EIO;
|
|
return i2c_smbus_write_byte_data(i2c, reg, *src);
|
|
}
|
|
|
|
static u8 lp3972_reg_read(struct lp3972 *lp3972, u8 reg)
|
|
{
|
|
u16 val = 0;
|
|
|
|
mutex_lock(&lp3972->io_lock);
|
|
|
|
lp3972_i2c_read(lp3972->i2c, reg, 1, &val);
|
|
|
|
dev_dbg(lp3972->dev, "reg read 0x%02x -> 0x%02x\n", (int)reg,
|
|
(unsigned)val & 0xff);
|
|
|
|
mutex_unlock(&lp3972->io_lock);
|
|
|
|
return val & 0xff;
|
|
}
|
|
|
|
static int lp3972_set_bits(struct lp3972 *lp3972, u8 reg, u16 mask, u16 val)
|
|
{
|
|
u16 tmp;
|
|
int ret;
|
|
|
|
mutex_lock(&lp3972->io_lock);
|
|
|
|
ret = lp3972_i2c_read(lp3972->i2c, reg, 1, &tmp);
|
|
tmp = (tmp & ~mask) | val;
|
|
if (ret == 0) {
|
|
ret = lp3972_i2c_write(lp3972->i2c, reg, 1, &tmp);
|
|
dev_dbg(lp3972->dev, "reg write 0x%02x -> 0x%02x\n", (int)reg,
|
|
(unsigned)val & 0xff);
|
|
}
|
|
mutex_unlock(&lp3972->io_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int lp3972_ldo_list_voltage(struct regulator_dev *dev, unsigned index)
|
|
{
|
|
int ldo = rdev_get_id(dev) - LP3972_LDO1;
|
|
return 1000 * LP3972_LDO_VOL_VALUE_MAP(ldo)[index];
|
|
}
|
|
|
|
static int lp3972_ldo_is_enabled(struct regulator_dev *dev)
|
|
{
|
|
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
|
int ldo = rdev_get_id(dev) - LP3972_LDO1;
|
|
u16 mask = LP3972_LDO_OUTPUT_ENABLE_MASK(ldo);
|
|
u16 val;
|
|
|
|
val = lp3972_reg_read(lp3972, LP3972_LDO_OUTPUT_ENABLE_REG(ldo));
|
|
return !!(val & mask);
|
|
}
|
|
|
|
static int lp3972_ldo_enable(struct regulator_dev *dev)
|
|
{
|
|
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
|
int ldo = rdev_get_id(dev) - LP3972_LDO1;
|
|
u16 mask = LP3972_LDO_OUTPUT_ENABLE_MASK(ldo);
|
|
|
|
return lp3972_set_bits(lp3972, LP3972_LDO_OUTPUT_ENABLE_REG(ldo),
|
|
mask, mask);
|
|
}
|
|
|
|
static int lp3972_ldo_disable(struct regulator_dev *dev)
|
|
{
|
|
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
|
int ldo = rdev_get_id(dev) - LP3972_LDO1;
|
|
u16 mask = LP3972_LDO_OUTPUT_ENABLE_MASK(ldo);
|
|
|
|
return lp3972_set_bits(lp3972, LP3972_LDO_OUTPUT_ENABLE_REG(ldo),
|
|
mask, 0);
|
|
}
|
|
|
|
static int lp3972_ldo_get_voltage(struct regulator_dev *dev)
|
|
{
|
|
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
|
int ldo = rdev_get_id(dev) - LP3972_LDO1;
|
|
u16 mask = LP3972_LDO_VOL_MASK(ldo);
|
|
u16 val, reg;
|
|
|
|
reg = lp3972_reg_read(lp3972, LP3972_LDO_VOL_CONTR_REG(ldo));
|
|
val = (reg >> LP3972_LDO_VOL_CONTR_SHIFT(ldo)) & mask;
|
|
|
|
return 1000 * LP3972_LDO_VOL_VALUE_MAP(ldo)[val];
|
|
}
|
|
|
|
static int lp3972_ldo_set_voltage(struct regulator_dev *dev,
|
|
int min_uV, int max_uV,
|
|
unsigned int *selector)
|
|
{
|
|
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
|
int ldo = rdev_get_id(dev) - LP3972_LDO1;
|
|
int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
|
|
const int *vol_map = LP3972_LDO_VOL_VALUE_MAP(ldo);
|
|
u16 val;
|
|
int shift, ret;
|
|
|
|
if (min_vol < vol_map[LP3972_LDO_VOL_MIN_IDX(ldo)] ||
|
|
min_vol > vol_map[LP3972_LDO_VOL_MAX_IDX(ldo)])
|
|
return -EINVAL;
|
|
|
|
for (val = LP3972_LDO_VOL_MIN_IDX(ldo);
|
|
val <= LP3972_LDO_VOL_MAX_IDX(ldo); val++)
|
|
if (vol_map[val] >= min_vol)
|
|
break;
|
|
|
|
if (val > LP3972_LDO_VOL_MAX_IDX(ldo) || vol_map[val] > max_vol)
|
|
return -EINVAL;
|
|
|
|
*selector = val;
|
|
|
|
shift = LP3972_LDO_VOL_CONTR_SHIFT(ldo);
|
|
ret = lp3972_set_bits(lp3972, LP3972_LDO_VOL_CONTR_REG(ldo),
|
|
LP3972_LDO_VOL_MASK(ldo) << shift, val << shift);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* LDO1 and LDO5 support voltage control by either target voltage1
|
|
* or target voltage2 register.
|
|
* We use target voltage1 register for LDO1 and LDO5 in this driver.
|
|
* We need to update voltage change control register(0x20) to enable
|
|
* LDO1 and LDO5 to change to their programmed target values.
|
|
*/
|
|
switch (ldo) {
|
|
case LP3972_LDO1:
|
|
case LP3972_LDO5:
|
|
shift = LP3972_LDO_VOL_CHANGE_SHIFT(ldo);
|
|
ret = lp3972_set_bits(lp3972, LP3972_VOL_CHANGE_REG,
|
|
LP3972_VOL_CHANGE_FLAG_MASK << shift,
|
|
LP3972_VOL_CHANGE_FLAG_GO << shift);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = lp3972_set_bits(lp3972, LP3972_VOL_CHANGE_REG,
|
|
LP3972_VOL_CHANGE_FLAG_MASK << shift, 0);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct regulator_ops lp3972_ldo_ops = {
|
|
.list_voltage = lp3972_ldo_list_voltage,
|
|
.is_enabled = lp3972_ldo_is_enabled,
|
|
.enable = lp3972_ldo_enable,
|
|
.disable = lp3972_ldo_disable,
|
|
.get_voltage = lp3972_ldo_get_voltage,
|
|
.set_voltage = lp3972_ldo_set_voltage,
|
|
};
|
|
|
|
static int lp3972_dcdc_list_voltage(struct regulator_dev *dev, unsigned index)
|
|
{
|
|
int buck = rdev_get_id(dev) - LP3972_DCDC1;
|
|
return 1000 * buck_voltage_map[buck][index];
|
|
}
|
|
|
|
static int lp3972_dcdc_is_enabled(struct regulator_dev *dev)
|
|
{
|
|
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
|
int buck = rdev_get_id(dev) - LP3972_DCDC1;
|
|
u16 mask = 1 << (buck * 2);
|
|
u16 val;
|
|
|
|
val = lp3972_reg_read(lp3972, LP3972_BUCK_VOL_ENABLE_REG(buck));
|
|
return !!(val & mask);
|
|
}
|
|
|
|
static int lp3972_dcdc_enable(struct regulator_dev *dev)
|
|
{
|
|
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
|
int buck = rdev_get_id(dev) - LP3972_DCDC1;
|
|
u16 mask = 1 << (buck * 2);
|
|
u16 val;
|
|
|
|
val = lp3972_set_bits(lp3972, LP3972_BUCK_VOL_ENABLE_REG(buck),
|
|
mask, mask);
|
|
return val;
|
|
}
|
|
|
|
static int lp3972_dcdc_disable(struct regulator_dev *dev)
|
|
{
|
|
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
|
int buck = rdev_get_id(dev) - LP3972_DCDC1;
|
|
u16 mask = 1 << (buck * 2);
|
|
u16 val;
|
|
|
|
val = lp3972_set_bits(lp3972, LP3972_BUCK_VOL_ENABLE_REG(buck),
|
|
mask, 0);
|
|
return val;
|
|
}
|
|
|
|
static int lp3972_dcdc_get_voltage(struct regulator_dev *dev)
|
|
{
|
|
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
|
int buck = rdev_get_id(dev) - LP3972_DCDC1;
|
|
u16 reg;
|
|
int val;
|
|
|
|
reg = lp3972_reg_read(lp3972, LP3972_BUCK_VOL1_REG(buck));
|
|
reg &= LP3972_BUCK_VOL_MASK;
|
|
if (reg <= LP3972_BUCK_VOL_MAX_IDX(buck))
|
|
val = 1000 * buck_voltage_map[buck][reg];
|
|
else {
|
|
val = 0;
|
|
dev_warn(&dev->dev, "chip reported incorrect voltage value."
|
|
" reg = %d\n", reg);
|
|
}
|
|
|
|
return val;
|
|
}
|
|
|
|
static int lp3972_dcdc_set_voltage(struct regulator_dev *dev,
|
|
int min_uV, int max_uV,
|
|
unsigned int *selector)
|
|
{
|
|
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
|
int buck = rdev_get_id(dev) - LP3972_DCDC1;
|
|
int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
|
|
const int *vol_map = buck_voltage_map[buck];
|
|
u16 val;
|
|
int ret;
|
|
|
|
if (min_vol < vol_map[LP3972_BUCK_VOL_MIN_IDX(buck)] ||
|
|
min_vol > vol_map[LP3972_BUCK_VOL_MAX_IDX(buck)])
|
|
return -EINVAL;
|
|
|
|
for (val = LP3972_BUCK_VOL_MIN_IDX(buck);
|
|
val <= LP3972_BUCK_VOL_MAX_IDX(buck); val++)
|
|
if (vol_map[val] >= min_vol)
|
|
break;
|
|
|
|
if (val > LP3972_BUCK_VOL_MAX_IDX(buck) ||
|
|
vol_map[val] > max_vol)
|
|
return -EINVAL;
|
|
|
|
*selector = val;
|
|
|
|
ret = lp3972_set_bits(lp3972, LP3972_BUCK_VOL1_REG(buck),
|
|
LP3972_BUCK_VOL_MASK, val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (buck != 0)
|
|
return ret;
|
|
|
|
ret = lp3972_set_bits(lp3972, LP3972_VOL_CHANGE_REG,
|
|
LP3972_VOL_CHANGE_FLAG_MASK, LP3972_VOL_CHANGE_FLAG_GO);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return lp3972_set_bits(lp3972, LP3972_VOL_CHANGE_REG,
|
|
LP3972_VOL_CHANGE_FLAG_MASK, 0);
|
|
}
|
|
|
|
static struct regulator_ops lp3972_dcdc_ops = {
|
|
.list_voltage = lp3972_dcdc_list_voltage,
|
|
.is_enabled = lp3972_dcdc_is_enabled,
|
|
.enable = lp3972_dcdc_enable,
|
|
.disable = lp3972_dcdc_disable,
|
|
.get_voltage = lp3972_dcdc_get_voltage,
|
|
.set_voltage = lp3972_dcdc_set_voltage,
|
|
};
|
|
|
|
static struct regulator_desc regulators[] = {
|
|
{
|
|
.name = "LDO1",
|
|
.id = LP3972_LDO1,
|
|
.ops = &lp3972_ldo_ops,
|
|
.n_voltages = ARRAY_SIZE(ldo1_voltage_map),
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
{
|
|
.name = "LDO2",
|
|
.id = LP3972_LDO2,
|
|
.ops = &lp3972_ldo_ops,
|
|
.n_voltages = ARRAY_SIZE(ldo23_voltage_map),
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
{
|
|
.name = "LDO3",
|
|
.id = LP3972_LDO3,
|
|
.ops = &lp3972_ldo_ops,
|
|
.n_voltages = ARRAY_SIZE(ldo23_voltage_map),
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
{
|
|
.name = "LDO4",
|
|
.id = LP3972_LDO4,
|
|
.ops = &lp3972_ldo_ops,
|
|
.n_voltages = ARRAY_SIZE(ldo4_voltage_map),
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
{
|
|
.name = "LDO5",
|
|
.id = LP3972_LDO5,
|
|
.ops = &lp3972_ldo_ops,
|
|
.n_voltages = ARRAY_SIZE(ldo5_voltage_map),
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
{
|
|
.name = "DCDC1",
|
|
.id = LP3972_DCDC1,
|
|
.ops = &lp3972_dcdc_ops,
|
|
.n_voltages = ARRAY_SIZE(buck1_voltage_map),
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
{
|
|
.name = "DCDC2",
|
|
.id = LP3972_DCDC2,
|
|
.ops = &lp3972_dcdc_ops,
|
|
.n_voltages = ARRAY_SIZE(buck23_voltage_map),
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
{
|
|
.name = "DCDC3",
|
|
.id = LP3972_DCDC3,
|
|
.ops = &lp3972_dcdc_ops,
|
|
.n_voltages = ARRAY_SIZE(buck23_voltage_map),
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __devinit setup_regulators(struct lp3972 *lp3972,
|
|
struct lp3972_platform_data *pdata)
|
|
{
|
|
int i, err;
|
|
|
|
lp3972->num_regulators = pdata->num_regulators;
|
|
lp3972->rdev = kcalloc(pdata->num_regulators,
|
|
sizeof(struct regulator_dev *), GFP_KERNEL);
|
|
if (!lp3972->rdev) {
|
|
err = -ENOMEM;
|
|
goto err_nomem;
|
|
}
|
|
|
|
/* Instantiate the regulators */
|
|
for (i = 0; i < pdata->num_regulators; i++) {
|
|
struct lp3972_regulator_subdev *reg = &pdata->regulators[i];
|
|
lp3972->rdev[i] = regulator_register(®ulators[reg->id],
|
|
lp3972->dev, reg->initdata, lp3972);
|
|
|
|
if (IS_ERR(lp3972->rdev[i])) {
|
|
err = PTR_ERR(lp3972->rdev[i]);
|
|
dev_err(lp3972->dev, "regulator init failed: %d\n",
|
|
err);
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
error:
|
|
while (--i >= 0)
|
|
regulator_unregister(lp3972->rdev[i]);
|
|
kfree(lp3972->rdev);
|
|
lp3972->rdev = NULL;
|
|
err_nomem:
|
|
return err;
|
|
}
|
|
|
|
static int __devinit lp3972_i2c_probe(struct i2c_client *i2c,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct lp3972 *lp3972;
|
|
struct lp3972_platform_data *pdata = i2c->dev.platform_data;
|
|
int ret;
|
|
u16 val;
|
|
|
|
if (!pdata) {
|
|
dev_dbg(&i2c->dev, "No platform init data supplied\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
lp3972 = kzalloc(sizeof(struct lp3972), GFP_KERNEL);
|
|
if (!lp3972)
|
|
return -ENOMEM;
|
|
|
|
lp3972->i2c = i2c;
|
|
lp3972->dev = &i2c->dev;
|
|
|
|
mutex_init(&lp3972->io_lock);
|
|
|
|
/* Detect LP3972 */
|
|
ret = lp3972_i2c_read(i2c, LP3972_SYS_CONTROL1_REG, 1, &val);
|
|
if (ret == 0 &&
|
|
(val & SYS_CONTROL1_INIT_MASK) != SYS_CONTROL1_INIT_VAL) {
|
|
ret = -ENODEV;
|
|
dev_err(&i2c->dev, "chip reported: val = 0x%x\n", val);
|
|
}
|
|
if (ret < 0) {
|
|
dev_err(&i2c->dev, "failed to detect device. ret = %d\n", ret);
|
|
goto err_detect;
|
|
}
|
|
|
|
ret = setup_regulators(lp3972, pdata);
|
|
if (ret < 0)
|
|
goto err_detect;
|
|
|
|
i2c_set_clientdata(i2c, lp3972);
|
|
return 0;
|
|
|
|
err_detect:
|
|
kfree(lp3972);
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit lp3972_i2c_remove(struct i2c_client *i2c)
|
|
{
|
|
struct lp3972 *lp3972 = i2c_get_clientdata(i2c);
|
|
int i;
|
|
|
|
for (i = 0; i < lp3972->num_regulators; i++)
|
|
regulator_unregister(lp3972->rdev[i]);
|
|
kfree(lp3972->rdev);
|
|
kfree(lp3972);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id lp3972_i2c_id[] = {
|
|
{ "lp3972", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, lp3972_i2c_id);
|
|
|
|
static struct i2c_driver lp3972_i2c_driver = {
|
|
.driver = {
|
|
.name = "lp3972",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = lp3972_i2c_probe,
|
|
.remove = __devexit_p(lp3972_i2c_remove),
|
|
.id_table = lp3972_i2c_id,
|
|
};
|
|
|
|
static int __init lp3972_module_init(void)
|
|
{
|
|
return i2c_add_driver(&lp3972_i2c_driver);
|
|
}
|
|
subsys_initcall(lp3972_module_init);
|
|
|
|
static void __exit lp3972_module_exit(void)
|
|
{
|
|
i2c_del_driver(&lp3972_i2c_driver);
|
|
}
|
|
module_exit(lp3972_module_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Axel Lin <axel.lin@gmail.com>");
|
|
MODULE_DESCRIPTION("LP3972 PMIC driver");
|