// SPDX-License-Identifier: GPL-2.0-only
/*
* tps6507x - regulator . c
*
* Regulator driver for TPS65073 PMIC
*
* Copyright ( C ) 2009 Texas Instrument Incorporated - https : //www.ti.com/
*/
#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/of.h>
#include <linux/slab.h>
#include <linux/mfd/tps6507x.h>
#include <linux/regulator/of_regulator.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 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 const 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,
.map_voltage = regulator_map_voltage_ascend,
};
static int tps6507x_pmic_of_parse_cb(struct device_node *np,
const struct regulator_desc *desc,
struct regulator_config *config)
{
struct tps6507x_pmic *tps = config->driver_data;
struct tps_info *info = tps->info[desc->id];
u32 prop;
int ret;
ret = of_property_read_u32(np, "ti,defdcdc_default" , &prop);
if (!ret)
info->defdcdc_default = prop;
return 0 ;
}
static 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 = NULL;
struct regulator_dev *rdev;
struct tps6507x_pmic *tps;
struct tps6507x_board *tps_board;
int i;
/**
* tps_board points to pmic related constants
* coming from the board - evm file .
*/
tps_board = dev_get_platdata(tps6507x_dev->dev);
if (tps_board)
init_data = tps_board->tps6507x_pmic_init_data;
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++) {
/* Register the regulators */
tps->info[i] = info;
if (init_data && init_data[i].driver_data) {
struct tps6507x_reg_platform_data *data =
init_data[i].driver_data;
info->defdcdc_default = data->defdcdc_default;
}
tps->desc[i].name = info->name;
tps->desc[i].of_match = of_match_ptr(info->name);
tps->desc[i].regulators_node = of_match_ptr("regulators" );
tps->desc[i].of_parse_cb = tps6507x_pmic_of_parse_cb;
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 = devm_regulator_register(&pdev->dev, &tps->desc[i],
&config);
if (IS_ERR(rdev)) {
dev_err(tps6507x_dev->dev,
"failed to register %s regulator\n" ,
pdev->name);
return PTR_ERR(rdev);
}
}
tps6507x_dev->pmic = tps;
platform_set_drvdata(pdev, tps6507x_dev);
return 0 ;
}
static struct platform_driver tps6507x_pmic_driver = {
.driver = {
.name = "tps6507x-pmic" ,
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
.probe = tps6507x_pmic_probe,
};
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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