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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
* Tero Kristo <t-kristo@ti.com>
*/
#include <common.h>
#include <dm.h>
#include <i2c.h>
#include <dm/device_compat.h>
#include <power/regulator.h>
#define TPS62360_REG_SET0 0
#define TPS62360_I2C_CHIP 0x60
#define TPS62360_VSEL_STEPSIZE 10000 /* In uV */
struct tps62360_regulator_config {
u32 vmin;
u32 vmax;
};
struct tps62360_regulator_pdata {
u8 vsel_offset;
struct udevice *i2c;
struct tps62360_regulator_config *config;
};
/*
* TPS62362/TPS62363 are just re-using these values for now, their preset
* voltage values are just different compared to TPS62360/TPS62361.
*/
static struct tps62360_regulator_config tps62360_data = {
.vmin = 770000,
.vmax = 1400000,
};
static struct tps62360_regulator_config tps62361_data = {
.vmin = 500000,
.vmax = 1770000,
};
static int tps62360_regulator_set_value(struct udevice *dev, int uV)
{
struct tps62360_regulator_pdata *pdata = dev_get_platdata(dev);
u8 regval;
if (uV < pdata->config->vmin || uV > pdata->config->vmax)
return -EINVAL;
uV -= pdata->config->vmin;
uV = DIV_ROUND_UP(uV, TPS62360_VSEL_STEPSIZE);
if (uV > U8_MAX)
return -EINVAL;
regval = (u8)uV;
return dm_i2c_write(pdata->i2c, TPS62360_REG_SET0 + pdata->vsel_offset,
®val, 1);
}
static int tps62360_regulator_get_value(struct udevice *dev)
{
u8 regval;
int ret;
struct tps62360_regulator_pdata *pdata = dev_get_platdata(dev);
ret = dm_i2c_read(pdata->i2c, TPS62360_REG_SET0 + pdata->vsel_offset,
®val, 1);
if (ret) {
dev_err(dev, "i2c read failed: %d\n", ret);
return ret;
}
return (u32)regval * TPS62360_VSEL_STEPSIZE + pdata->config->vmin;
}
static int tps62360_regulator_probe(struct udevice *dev)
{
struct tps62360_regulator_pdata *pdata = dev_get_platdata(dev);
u8 vsel0;
u8 vsel1;
int ret;
pdata->config = (void *)dev_get_driver_data(dev);
vsel0 = dev_read_bool(dev, "ti,vsel0-state-high");
vsel1 = dev_read_bool(dev, "ti,vsel1-state-high");
pdata->vsel_offset = vsel0 + vsel1 * 2;
ret = i2c_get_chip(dev->parent, TPS62360_I2C_CHIP, 1, &pdata->i2c);
if (ret) {
dev_err(dev, "i2c dev get failed.\n");
return ret;
}
return 0;
}
static const struct dm_regulator_ops tps62360_regulator_ops = {
.get_value = tps62360_regulator_get_value,
.set_value = tps62360_regulator_set_value,
};
static const struct udevice_id tps62360_regulator_ids[] = {
{ .compatible = "ti,tps62360", .data = (ulong)&tps62360_data },
{ .compatible = "ti,tps62361", .data = (ulong)&tps62361_data },
{ .compatible = "ti,tps62362", .data = (ulong)&tps62360_data },
{ .compatible = "ti,tps62363", .data = (ulong)&tps62361_data },
{ },
};
U_BOOT_DRIVER(tps62360_regulator) = {
.name = "tps62360_regulator",
.id = UCLASS_REGULATOR,
.ops = &tps62360_regulator_ops,
.of_match = tps62360_regulator_ids,
.platdata_auto = sizeof(struct tps62360_regulator_pdata),
.probe = tps62360_regulator_probe,
};
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