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