436 lines
11 KiB
C
436 lines
11 KiB
C
/*
|
|
* tps65023-regulator.c
|
|
*
|
|
* Supports TPS65023 Regulator
|
|
*
|
|
* 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/i2c.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/regmap.h>
|
|
|
|
/* Register definitions */
|
|
#define TPS65023_REG_VERSION 0
|
|
#define TPS65023_REG_PGOODZ 1
|
|
#define TPS65023_REG_MASK 2
|
|
#define TPS65023_REG_REG_CTRL 3
|
|
#define TPS65023_REG_CON_CTRL 4
|
|
#define TPS65023_REG_CON_CTRL2 5
|
|
#define TPS65023_REG_DEF_CORE 6
|
|
#define TPS65023_REG_DEFSLEW 7
|
|
#define TPS65023_REG_LDO_CTRL 8
|
|
|
|
/* PGOODZ bitfields */
|
|
#define TPS65023_PGOODZ_PWRFAILZ BIT(7)
|
|
#define TPS65023_PGOODZ_LOWBATTZ BIT(6)
|
|
#define TPS65023_PGOODZ_VDCDC1 BIT(5)
|
|
#define TPS65023_PGOODZ_VDCDC2 BIT(4)
|
|
#define TPS65023_PGOODZ_VDCDC3 BIT(3)
|
|
#define TPS65023_PGOODZ_LDO2 BIT(2)
|
|
#define TPS65023_PGOODZ_LDO1 BIT(1)
|
|
|
|
/* MASK bitfields */
|
|
#define TPS65023_MASK_PWRFAILZ BIT(7)
|
|
#define TPS65023_MASK_LOWBATTZ BIT(6)
|
|
#define TPS65023_MASK_VDCDC1 BIT(5)
|
|
#define TPS65023_MASK_VDCDC2 BIT(4)
|
|
#define TPS65023_MASK_VDCDC3 BIT(3)
|
|
#define TPS65023_MASK_LDO2 BIT(2)
|
|
#define TPS65023_MASK_LDO1 BIT(1)
|
|
|
|
/* REG_CTRL bitfields */
|
|
#define TPS65023_REG_CTRL_VDCDC1_EN BIT(5)
|
|
#define TPS65023_REG_CTRL_VDCDC2_EN BIT(4)
|
|
#define TPS65023_REG_CTRL_VDCDC3_EN BIT(3)
|
|
#define TPS65023_REG_CTRL_LDO2_EN BIT(2)
|
|
#define TPS65023_REG_CTRL_LDO1_EN BIT(1)
|
|
|
|
/* REG_CTRL2 bitfields */
|
|
#define TPS65023_REG_CTRL2_GO BIT(7)
|
|
#define TPS65023_REG_CTRL2_CORE_ADJ BIT(6)
|
|
#define TPS65023_REG_CTRL2_DCDC2 BIT(2)
|
|
#define TPS65023_REG_CTRL2_DCDC1 BIT(1)
|
|
#define TPS65023_REG_CTRL2_DCDC3 BIT(0)
|
|
|
|
/* Number of step-down converters available */
|
|
#define TPS65023_NUM_DCDC 3
|
|
/* Number of LDO voltage regulators available */
|
|
#define TPS65023_NUM_LDO 2
|
|
/* Number of total regulators available */
|
|
#define TPS65023_NUM_REGULATOR (TPS65023_NUM_DCDC + TPS65023_NUM_LDO)
|
|
|
|
/* DCDCs */
|
|
#define TPS65023_DCDC_1 0
|
|
#define TPS65023_DCDC_2 1
|
|
#define TPS65023_DCDC_3 2
|
|
/* LDOs */
|
|
#define TPS65023_LDO_1 3
|
|
#define TPS65023_LDO_2 4
|
|
|
|
#define TPS65023_MAX_REG_ID TPS65023_LDO_2
|
|
|
|
/* Supported voltage values for regulators */
|
|
static const unsigned int VCORE_VSEL_table[] = {
|
|
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, 1525000, 1550000, 1600000,
|
|
};
|
|
|
|
static const unsigned int DCDC_FIXED_3300000_VSEL_table[] = {
|
|
3300000,
|
|
};
|
|
|
|
static const unsigned int DCDC_FIXED_1800000_VSEL_table[] = {
|
|
1800000,
|
|
};
|
|
|
|
/* Supported voltage values for LDO regulators for tps65020 */
|
|
static const unsigned int TPS65020_LDO_VSEL_table[] = {
|
|
1000000, 1050000, 1100000, 1300000,
|
|
1800000, 2500000, 3000000, 3300000,
|
|
};
|
|
|
|
/* Supported voltage values for LDO regulators
|
|
* for tps65021 and tps65023 */
|
|
static const unsigned int TPS65023_LDO1_VSEL_table[] = {
|
|
1000000, 1100000, 1300000, 1800000,
|
|
2200000, 2600000, 2800000, 3150000,
|
|
};
|
|
|
|
static const unsigned int TPS65023_LDO2_VSEL_table[] = {
|
|
1050000, 1200000, 1300000, 1800000,
|
|
2500000, 2800000, 3000000, 3300000,
|
|
};
|
|
|
|
/* Regulator specific details */
|
|
struct tps_info {
|
|
const char *name;
|
|
u8 table_len;
|
|
const unsigned int *table;
|
|
};
|
|
|
|
/* PMIC details */
|
|
struct tps_pmic {
|
|
struct regulator_desc desc[TPS65023_NUM_REGULATOR];
|
|
struct regulator_dev *rdev[TPS65023_NUM_REGULATOR];
|
|
const struct tps_info *info[TPS65023_NUM_REGULATOR];
|
|
struct regmap *regmap;
|
|
u8 core_regulator;
|
|
};
|
|
|
|
/* Struct passed as driver data */
|
|
struct tps_driver_data {
|
|
const struct tps_info *info;
|
|
u8 core_regulator;
|
|
};
|
|
|
|
static int tps65023_dcdc_get_voltage_sel(struct regulator_dev *dev)
|
|
{
|
|
struct tps_pmic *tps = rdev_get_drvdata(dev);
|
|
int dcdc = rdev_get_id(dev);
|
|
|
|
if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
|
|
return -EINVAL;
|
|
|
|
if (dcdc != tps->core_regulator)
|
|
return 0;
|
|
|
|
return regulator_get_voltage_sel_regmap(dev);
|
|
}
|
|
|
|
static int tps65023_dcdc_set_voltage_sel(struct regulator_dev *dev,
|
|
unsigned selector)
|
|
{
|
|
struct tps_pmic *tps = rdev_get_drvdata(dev);
|
|
int dcdc = rdev_get_id(dev);
|
|
|
|
if (dcdc != tps->core_regulator)
|
|
return -EINVAL;
|
|
|
|
return regulator_set_voltage_sel_regmap(dev, selector);
|
|
}
|
|
|
|
/* Operations permitted on VDCDCx */
|
|
static struct regulator_ops tps65023_dcdc_ops = {
|
|
.is_enabled = regulator_is_enabled_regmap,
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
.get_voltage_sel = tps65023_dcdc_get_voltage_sel,
|
|
.set_voltage_sel = tps65023_dcdc_set_voltage_sel,
|
|
.list_voltage = regulator_list_voltage_table,
|
|
.map_voltage = regulator_map_voltage_ascend,
|
|
};
|
|
|
|
/* Operations permitted on LDOx */
|
|
static struct regulator_ops tps65023_ldo_ops = {
|
|
.is_enabled = regulator_is_enabled_regmap,
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
.get_voltage_sel = regulator_get_voltage_sel_regmap,
|
|
.set_voltage_sel = regulator_set_voltage_sel_regmap,
|
|
.list_voltage = regulator_list_voltage_table,
|
|
.map_voltage = regulator_map_voltage_ascend,
|
|
};
|
|
|
|
static struct regmap_config tps65023_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
};
|
|
|
|
static int tps_65023_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
const struct tps_driver_data *drv_data = (void *)id->driver_data;
|
|
const struct tps_info *info = drv_data->info;
|
|
struct regulator_config config = { };
|
|
struct regulator_init_data *init_data;
|
|
struct regulator_dev *rdev;
|
|
struct tps_pmic *tps;
|
|
int i;
|
|
int error;
|
|
|
|
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return -EIO;
|
|
|
|
/**
|
|
* init_data points to array of regulator_init structures
|
|
* coming from the board-evm file.
|
|
*/
|
|
init_data = dev_get_platdata(&client->dev);
|
|
if (!init_data)
|
|
return -EIO;
|
|
|
|
tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
|
|
if (!tps)
|
|
return -ENOMEM;
|
|
|
|
tps->regmap = devm_regmap_init_i2c(client, &tps65023_regmap_config);
|
|
if (IS_ERR(tps->regmap)) {
|
|
error = PTR_ERR(tps->regmap);
|
|
dev_err(&client->dev, "Failed to allocate register map: %d\n",
|
|
error);
|
|
return error;
|
|
}
|
|
|
|
/* common for all regulators */
|
|
tps->core_regulator = drv_data->core_regulator;
|
|
|
|
for (i = 0; i < TPS65023_NUM_REGULATOR; i++, info++, init_data++) {
|
|
/* Store regulator specific information */
|
|
tps->info[i] = info;
|
|
|
|
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 = (i > TPS65023_DCDC_3 ?
|
|
&tps65023_ldo_ops : &tps65023_dcdc_ops);
|
|
tps->desc[i].type = REGULATOR_VOLTAGE;
|
|
tps->desc[i].owner = THIS_MODULE;
|
|
|
|
tps->desc[i].enable_reg = TPS65023_REG_REG_CTRL;
|
|
switch (i) {
|
|
case TPS65023_LDO_1:
|
|
tps->desc[i].vsel_reg = TPS65023_REG_LDO_CTRL;
|
|
tps->desc[i].vsel_mask = 0x07;
|
|
tps->desc[i].enable_mask = 1 << 1;
|
|
break;
|
|
case TPS65023_LDO_2:
|
|
tps->desc[i].vsel_reg = TPS65023_REG_LDO_CTRL;
|
|
tps->desc[i].vsel_mask = 0x70;
|
|
tps->desc[i].enable_mask = 1 << 2;
|
|
break;
|
|
default: /* DCDCx */
|
|
tps->desc[i].enable_mask =
|
|
1 << (TPS65023_NUM_REGULATOR - i);
|
|
tps->desc[i].vsel_reg = TPS65023_REG_DEF_CORE;
|
|
tps->desc[i].vsel_mask = info->table_len - 1;
|
|
tps->desc[i].apply_reg = TPS65023_REG_CON_CTRL2;
|
|
tps->desc[i].apply_bit = TPS65023_REG_CTRL2_GO;
|
|
}
|
|
|
|
config.dev = &client->dev;
|
|
config.init_data = init_data;
|
|
config.driver_data = tps;
|
|
config.regmap = tps->regmap;
|
|
|
|
/* Register the regulators */
|
|
rdev = devm_regulator_register(&client->dev, &tps->desc[i],
|
|
&config);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(&client->dev, "failed to register %s\n",
|
|
id->name);
|
|
return PTR_ERR(rdev);
|
|
}
|
|
|
|
/* Save regulator for cleanup */
|
|
tps->rdev[i] = rdev;
|
|
}
|
|
|
|
i2c_set_clientdata(client, tps);
|
|
|
|
/* Enable setting output voltage by I2C */
|
|
regmap_update_bits(tps->regmap, TPS65023_REG_CON_CTRL2,
|
|
TPS65023_REG_CTRL2_CORE_ADJ,
|
|
TPS65023_REG_CTRL2_CORE_ADJ);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct tps_info tps65020_regs[] = {
|
|
{
|
|
.name = "VDCDC1",
|
|
.table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
|
|
.table = DCDC_FIXED_3300000_VSEL_table,
|
|
},
|
|
{
|
|
.name = "VDCDC2",
|
|
.table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
|
|
.table = DCDC_FIXED_1800000_VSEL_table,
|
|
},
|
|
{
|
|
.name = "VDCDC3",
|
|
.table_len = ARRAY_SIZE(VCORE_VSEL_table),
|
|
.table = VCORE_VSEL_table,
|
|
},
|
|
{
|
|
.name = "LDO1",
|
|
.table_len = ARRAY_SIZE(TPS65020_LDO_VSEL_table),
|
|
.table = TPS65020_LDO_VSEL_table,
|
|
},
|
|
{
|
|
.name = "LDO2",
|
|
.table_len = ARRAY_SIZE(TPS65020_LDO_VSEL_table),
|
|
.table = TPS65020_LDO_VSEL_table,
|
|
},
|
|
};
|
|
|
|
static const struct tps_info tps65021_regs[] = {
|
|
{
|
|
.name = "VDCDC1",
|
|
.table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
|
|
.table = DCDC_FIXED_3300000_VSEL_table,
|
|
},
|
|
{
|
|
.name = "VDCDC2",
|
|
.table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
|
|
.table = DCDC_FIXED_1800000_VSEL_table,
|
|
},
|
|
{
|
|
.name = "VDCDC3",
|
|
.table_len = ARRAY_SIZE(VCORE_VSEL_table),
|
|
.table = VCORE_VSEL_table,
|
|
},
|
|
{
|
|
.name = "LDO1",
|
|
.table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
|
|
.table = TPS65023_LDO1_VSEL_table,
|
|
},
|
|
{
|
|
.name = "LDO2",
|
|
.table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
|
|
.table = TPS65023_LDO2_VSEL_table,
|
|
},
|
|
};
|
|
|
|
static const struct tps_info tps65023_regs[] = {
|
|
{
|
|
.name = "VDCDC1",
|
|
.table_len = ARRAY_SIZE(VCORE_VSEL_table),
|
|
.table = VCORE_VSEL_table,
|
|
},
|
|
{
|
|
.name = "VDCDC2",
|
|
.table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
|
|
.table = DCDC_FIXED_3300000_VSEL_table,
|
|
},
|
|
{
|
|
.name = "VDCDC3",
|
|
.table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
|
|
.table = DCDC_FIXED_1800000_VSEL_table,
|
|
},
|
|
{
|
|
.name = "LDO1",
|
|
.table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
|
|
.table = TPS65023_LDO1_VSEL_table,
|
|
},
|
|
{
|
|
.name = "LDO2",
|
|
.table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
|
|
.table = TPS65023_LDO2_VSEL_table,
|
|
},
|
|
};
|
|
|
|
static struct tps_driver_data tps65020_drv_data = {
|
|
.info = tps65020_regs,
|
|
.core_regulator = TPS65023_DCDC_3,
|
|
};
|
|
|
|
static struct tps_driver_data tps65021_drv_data = {
|
|
.info = tps65021_regs,
|
|
.core_regulator = TPS65023_DCDC_3,
|
|
};
|
|
|
|
static struct tps_driver_data tps65023_drv_data = {
|
|
.info = tps65023_regs,
|
|
.core_regulator = TPS65023_DCDC_1,
|
|
};
|
|
|
|
static const struct i2c_device_id tps_65023_id[] = {
|
|
{.name = "tps65023",
|
|
.driver_data = (unsigned long) &tps65023_drv_data},
|
|
{.name = "tps65021",
|
|
.driver_data = (unsigned long) &tps65021_drv_data,},
|
|
{.name = "tps65020",
|
|
.driver_data = (unsigned long) &tps65020_drv_data},
|
|
{ },
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, tps_65023_id);
|
|
|
|
static struct i2c_driver tps_65023_i2c_driver = {
|
|
.driver = {
|
|
.name = "tps65023",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = tps_65023_probe,
|
|
.id_table = tps_65023_id,
|
|
};
|
|
|
|
static int __init tps_65023_init(void)
|
|
{
|
|
return i2c_add_driver(&tps_65023_i2c_driver);
|
|
}
|
|
subsys_initcall(tps_65023_init);
|
|
|
|
static void __exit tps_65023_cleanup(void)
|
|
{
|
|
i2c_del_driver(&tps_65023_i2c_driver);
|
|
}
|
|
module_exit(tps_65023_cleanup);
|
|
|
|
MODULE_AUTHOR("Texas Instruments");
|
|
MODULE_DESCRIPTION("TPS65023 voltage regulator driver");
|
|
MODULE_LICENSE("GPL v2");
|