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linux-next/drivers/regulator/tps6507x-regulator.c
Axel Lin 93b07e7bcd regulator: tps6507x: Avoid duplicating the same mapping table for LDO2 and VDCDCx 
The voltage mapping table for LDO2 is exactly the same as VDCDCx.
Thus we can use one mapping table for both LDO2 and VDCDCx instead of
duplicating the mapping table.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-06-05 11:20:53 +01:00

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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 || rid > TPS6507X_LDO_2)
return -EINVAL;
shift = TPS6507X_MAX_REG_ID - rid;
return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1,
1 << shift);
}
static int tps6507x_pmic_get_voltage_sel(struct regulator_dev *dev)
{
struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
int data, rid = rdev_get_id(dev);
u8 reg, mask;
switch (rid) {
case TPS6507X_DCDC_1:
reg = TPS6507X_REG_DEFDCDC1;
mask = TPS6507X_DEFDCDCX_DCDC_MASK;
break;
case TPS6507X_DCDC_2:
if (tps->info[rid]->defdcdc_default)
reg = TPS6507X_REG_DEFDCDC2_HIGH;
else
reg = TPS6507X_REG_DEFDCDC2_LOW;
mask = TPS6507X_DEFDCDCX_DCDC_MASK;
break;
case TPS6507X_DCDC_3:
if (tps->info[rid]->defdcdc_default)
reg = TPS6507X_REG_DEFDCDC3_HIGH;
else
reg = TPS6507X_REG_DEFDCDC3_LOW;
mask = TPS6507X_DEFDCDCX_DCDC_MASK;
break;
case TPS6507X_LDO_1:
reg = TPS6507X_REG_LDO_CTRL1;
mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK;
break;
case TPS6507X_LDO_2:
reg = TPS6507X_REG_DEFLDO2;
mask = TPS6507X_REG_DEFLDO2_LDO2_MASK;
break;
default:
return -EINVAL;
}
data = tps6507x_pmic_reg_read(tps, reg);
if (data < 0)
return data;
data &= mask;
return data;
}
static int tps6507x_pmic_set_voltage_sel(struct regulator_dev *dev,
unsigned selector)
{
struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
int data, rid = rdev_get_id(dev);
u8 reg, mask;
switch (rid) {
case TPS6507X_DCDC_1:
reg = TPS6507X_REG_DEFDCDC1;
mask = TPS6507X_DEFDCDCX_DCDC_MASK;
break;
case TPS6507X_DCDC_2:
if (tps->info[rid]->defdcdc_default)
reg = TPS6507X_REG_DEFDCDC2_HIGH;
else
reg = TPS6507X_REG_DEFDCDC2_LOW;
mask = TPS6507X_DEFDCDCX_DCDC_MASK;
break;
case TPS6507X_DCDC_3:
if (tps->info[rid]->defdcdc_default)
reg = TPS6507X_REG_DEFDCDC3_HIGH;
else
reg = TPS6507X_REG_DEFDCDC3_LOW;
mask = TPS6507X_DEFDCDCX_DCDC_MASK;
break;
case TPS6507X_LDO_1:
reg = TPS6507X_REG_LDO_CTRL1;
mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK;
break;
case TPS6507X_LDO_2:
reg = TPS6507X_REG_DEFLDO2;
mask = TPS6507X_REG_DEFLDO2_LDO2_MASK;
break;
default:
return -EINVAL;
}
data = tps6507x_pmic_reg_read(tps, reg);
if (data < 0)
return data;
data &= ~mask;
data |= selector;
return tps6507x_pmic_reg_write(tps, reg, data);
}
static struct regulator_ops tps6507x_pmic_ops = {
.is_enabled = tps6507x_pmic_is_enabled,
.enable = tps6507x_pmic_enable,
.disable = tps6507x_pmic_disable,
.get_voltage_sel = tps6507x_pmic_get_voltage_sel,
.set_voltage_sel = tps6507x_pmic_set_voltage_sel,
.list_voltage = regulator_list_voltage_table,
};
static __devinit int tps6507x_pmic_probe(struct platform_device *pdev)
{
struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent);
struct tps_info *info = &tps6507x_pmic_regs[0];
struct regulator_config config = { };
struct regulator_init_data *init_data;
struct regulator_dev *rdev;
struct tps6507x_pmic *tps;
struct tps6507x_board *tps_board;
int i;
int error;
/**
* tps_board points to pmic related constants
* coming from the board-evm file.
*/
tps_board = dev_get_platdata(tps6507x_dev->dev);
if (!tps_board)
return -EINVAL;
/**
* init_data points to array of regulator_init structures
* coming from the board-evm file.
*/
init_data = tps_board->tps6507x_pmic_init_data;
if (!init_data)
return -EINVAL;
tps = devm_kzalloc(&pdev->dev, sizeof(*tps), GFP_KERNEL);
if (!tps)
return -ENOMEM;
mutex_init(&tps->io_lock);
/* common for all regulators */
tps->mfd = tps6507x_dev;
for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) {
/* Register the regulators */
tps->info[i] = info;
if (init_data->driver_data) {
struct tps6507x_reg_platform_data *data =
init_data->driver_data;
tps->info[i]->defdcdc_default = data->defdcdc_default;
}
tps->desc[i].name = info->name;
tps->desc[i].id = i;
tps->desc[i].n_voltages = info->table_len;
tps->desc[i].volt_table = info->table;
tps->desc[i].ops = &tps6507x_pmic_ops;
tps->desc[i].type = REGULATOR_VOLTAGE;
tps->desc[i].owner = THIS_MODULE;
config.dev = tps6507x_dev->dev;
config.init_data = init_data;
config.driver_data = tps;
rdev = regulator_register(&tps->desc[i], &config);
if (IS_ERR(rdev)) {
dev_err(tps6507x_dev->dev,
"failed to register %s regulator\n",
pdev->name);
error = PTR_ERR(rdev);
goto fail;
}
/* Save regulator for cleanup */
tps->rdev[i] = rdev;
}
tps6507x_dev->pmic = tps;
platform_set_drvdata(pdev, tps6507x_dev);
return 0;
fail:
while (--i >= 0)
regulator_unregister(tps->rdev[i]);
return error;
}
static int __devexit tps6507x_pmic_remove(struct platform_device *pdev)
{
struct tps6507x_dev *tps6507x_dev = platform_get_drvdata(pdev);
struct tps6507x_pmic *tps = tps6507x_dev->pmic;
int i;
for (i = 0; i < TPS6507X_NUM_REGULATOR; i++)
regulator_unregister(tps->rdev[i]);
return 0;
}
static struct platform_driver tps6507x_pmic_driver = {
.driver = {
.name = "tps6507x-pmic",
.owner = THIS_MODULE,
},
.probe = tps6507x_pmic_probe,
.remove = __devexit_p(tps6507x_pmic_remove),
};
static int __init tps6507x_pmic_init(void)
{
return platform_driver_register(&tps6507x_pmic_driver);
}
subsys_initcall(tps6507x_pmic_init);
static void __exit tps6507x_pmic_cleanup(void)
{
platform_driver_unregister(&tps6507x_pmic_driver);
}
module_exit(tps6507x_pmic_cleanup);
MODULE_AUTHOR("Texas Instruments");
MODULE_DESCRIPTION("TPS6507x voltage regulator driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:tps6507x-pmic");
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