Quelle  tps6105x-regulator.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Driver for TPS61050/61052 boost converters, typically used for white LEDs
 * or audio amplifiers.
 *
 * Copyright (C) 2011 ST-Ericsson SA
 * Written on behalf of Linaro for ST-Ericsson
 *
 * Author: Linus Walleij <linus.walleij@linaro.org>
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/regmap.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps6105x.h>

static const unsigned int tps6105x_voltages[] = {
 4500000,
 5000000,
 5250000,
 5000000, /* There is an additional 5V */
};

static const struct regulator_ops tps6105x_regulator_ops = {
 .enable  = regulator_enable_regmap,
 .disable = regulator_disable_regmap,
 .is_enabled = regulator_is_enabled_regmap,
 .get_voltage_sel = regulator_get_voltage_sel_regmap,
 .set_voltage_sel = regulator_set_voltage_sel_regmap,
 .list_voltage = regulator_list_voltage_table,
};

static const struct regulator_desc tps6105x_regulator_desc = {
 .name  = "tps6105x-boost",
 .of_match = of_match_ptr("regulator"),
 .ops  = &tps6105x_regulator_ops,
 .type  = REGULATOR_VOLTAGE,
 .id  = 0,
 .owner  = THIS_MODULE,
 .n_voltages = ARRAY_SIZE(tps6105x_voltages),
 .volt_table = tps6105x_voltages,
 .vsel_reg = TPS6105X_REG_0,
 .vsel_mask = TPS6105X_REG0_VOLTAGE_MASK,
 .enable_reg = TPS6105X_REG_0,
 .enable_mask = TPS6105X_REG0_MODE_MASK,
 .enable_val = TPS6105X_REG0_MODE_VOLTAGE <<
     TPS6105X_REG0_MODE_SHIFT,
};

/*
 * Registers the chip as a voltage regulator
 */
static int tps6105x_regulator_probe(struct platform_device *pdev)
{
 struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
 struct tps6105x_platform_data *pdata = tps6105x->pdata;
 struct regulator_config config = { };
 int ret;

 /* This instance is not set for regulator mode so bail out */
 if (pdata->mode != TPS6105X_MODE_VOLTAGE) {
  dev_info(&pdev->dev,
   "chip not in voltage mode mode, exit probe\n");
  return 0;
 }

 config.dev = &tps6105x->client->dev;
 config.init_data = pdata->regulator_data;
 config.driver_data = tps6105x;
 config.of_node = pdev->dev.parent->of_node;
 config.regmap = tps6105x->regmap;

 /* Register regulator with framework */
 tps6105x->regulator = devm_regulator_register(&pdev->dev,
            &tps6105x_regulator_desc,
            &config);
 if (IS_ERR(tps6105x->regulator)) {
  ret = PTR_ERR(tps6105x->regulator);
  dev_err(&tps6105x->client->dev,
   "failed to register regulator\n");
  return ret;
 }
 platform_set_drvdata(pdev, tps6105x);

 return 0;
}

static struct platform_driver tps6105x_regulator_driver = {
 .driver = {
  .name  = "tps6105x-regulator",
  .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 },
 .probe = tps6105x_regulator_probe,
};

static __init int tps6105x_regulator_init(void)
{
 return platform_driver_register(&tps6105x_regulator_driver);
}
subsys_initcall(tps6105x_regulator_init);

static __exit void tps6105x_regulator_exit(void)
{
 platform_driver_unregister(&tps6105x_regulator_driver);
}
module_exit(tps6105x_regulator_exit);

MODULE_AUTHOR("Linus Walleij ");
MODULE_DESCRIPTION("TPS6105x regulator driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:tps6105x-regulator");