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|
/*
* tps6507x-regulator.c
*
* Regulator driver for TPS65073 PMIC
*
* Copyright (C) 2009 Texas Instrument Incorporated - http://www.ti.com/
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
* whether express or implied; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/tps6507x.h>
#include <linux/slab.h>
#include <linux/mfd/tps6507x.h>
/* DCDC's */
#define TPS6507X_DCDC_1 0
#define TPS6507X_DCDC_2 1
#define TPS6507X_DCDC_3 2
/* LDOs */
#define TPS6507X_LDO_1 3
#define TPS6507X_LDO_2 4
#define TPS6507X_MAX_REG_ID TPS6507X_LDO_2
/* Number of step-down converters available */
#define TPS6507X_NUM_DCDC 3
/* Number of LDO voltage regulators available */
#define TPS6507X_NUM_LDO 2
/* Number of total regulators available */
#define TPS6507X_NUM_REGULATOR (TPS6507X_NUM_DCDC + TPS6507X_NUM_LDO)
/* Supported voltage values for regulators (in microVolts) */
static const unsigned int VDCDCx_VSEL_table[] = {
725000, 750000, 775000, 800000,
825000, 850000, 875000, 900000,
925000, 950000, 975000, 1000000,
1025000, 1050000, 1075000, 1100000,
1125000, 1150000, 1175000, 1200000,
1225000, 1250000, 1275000, 1300000,
1325000, 1350000, 1375000, 1400000,
1425000, 1450000, 1475000, 1500000,
1550000, 1600000, 1650000, 1700000,
1750000, 1800000, 1850000, 1900000,
1950000, 2000000, 2050000, 2100000,
2150000, 2200000, 2250000, 2300000,
2350000, 2400000, 2450000, 2500000,
2550000, 2600000, 2650000, 2700000,
2750000, 2800000, 2850000, 2900000,
3000000, 3100000, 3200000, 3300000,
};
static const unsigned int LDO1_VSEL_table[] = {
1000000, 1100000, 1200000, 1250000,
1300000, 1350000, 1400000, 1500000,
1600000, 1800000, 2500000, 2750000,
2800000, 3000000, 3100000, 3300000,
};
/* The voltage mapping table for LDO2 is the same as VDCDCx */
#define LDO2_VSEL_table VDCDCx_VSEL_table
struct tps_info {
const char *name;
u8 table_len;
const unsigned int *table;
/* Does DCDC high or the low register defines output voltage? */
bool defdcdc_default;
};
static struct tps_info tps6507x_pmic_regs[] = {
{
.name = "VDCDC1",
.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
.table = VDCDCx_VSEL_table,
},
{
.name = "VDCDC2",
.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
.table = VDCDCx_VSEL_table,
},
{
.name = "VDCDC3",
.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
.table = VDCDCx_VSEL_table,
},
{
.name = "LDO1",
.table_len = ARRAY_SIZE(LDO1_VSEL_table),
.table = LDO1_VSEL_table,
},
{
.name = "LDO2",
.table_len = ARRAY_SIZE(LDO2_VSEL_table),
.table = LDO2_VSEL_table,
},
};
struct tps6507x_pmic {
struct regulator_desc desc[TPS6507X_NUM_REGULATOR];
struct tps6507x_dev *mfd;
struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR];
struct tps_info *info[TPS6507X_NUM_REGULATOR];
struct mutex io_lock;
};
static inline int tps6507x_pmic_read(struct tps6507x_pmic *tps, u8 reg)
{
u8 val;
int err;
err = tps->mfd->read_dev(tps->mfd, reg, 1, &val);
if (err)
return err;
return val;
}
static inline int tps6507x_pmic_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
{
return tps->mfd->write_dev(tps->mfd, reg, 1, &val);
}
static int tps6507x_pmic_set_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
{
int err, data;
mutex_lock(&tps->io_lock);
data = tps6507x_pmic_read(tps, reg);
if (data < 0) {
dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
err = data;
goto out;
}
data |= mask;
err = tps6507x_pmic_write(tps, reg, data);
if (err)
dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
out:
mutex_unlock(&tps->io_lock);
return err;
}
static int tps6507x_pmic_clear_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
{
int err, data;
mutex_lock(&tps->io_lock);
data = tps6507x_pmic_read(tps, reg);
if (data < 0) {
dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
err = data;
goto out;
}
data &= ~mask;
err = tps6507x_pmic_write(tps, reg, data);
if (err)
dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
out:
mutex_unlock(&tps->io_lock);
return err;
}
static int tps6507x_pmic_reg_read(struct tps6507x_pmic *tps, u8 reg)
{
int data;
mutex_lock(&tps->io_lock);
data = tps6507x_pmic_read(tps, reg);
if (data < 0)
dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
mutex_unlock(&tps->io_lock);
return data;
}
static int tps6507x_pmic_reg_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
{
int err;
mutex_lock(&tps->io_lock);
err = tps6507x_pmic_write(tps, reg, val);
if (err < 0)
dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
mutex_unlock(&tps->io_lock);
return err;
}
static int tps6507x_pmic_is_enabled(struct regulator_dev *dev)
{
struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
int data, rid = rdev_get_id(dev);
u8 shift;
if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
return -EINVAL;
shift = TPS6507X_MAX_REG_ID - rid;
data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1);
if (data < 0)
return data;
else
return (data & 1<<shift) ? 1 : 0;
}
static int tps6507x_pmic_enable(struct regulator_dev *dev)
{
struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
int rid = rdev_get_id(dev);
u8 shift;
if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
return -EINVAL;
shift = TPS6507X_MAX_REG_ID - rid;
return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
}
static int tps6507x_pmic_disable(struct regulator_dev *dev)
{
struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
int rid = rdev_get_id(dev);
u8 shift;
if (rid < TPS6507X_DCDC_1
|