// 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");
