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+/*
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+ * Driver for TPS61050/61052 boost converters, typically used for white LEDs
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+ * or audio amplifiers.
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+ *
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+ * Copyright (C) 2011 ST-Ericsson SA
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+ * Written on behalf of Linaro for ST-Ericsson
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+ *
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+ * Author: Linus Walleij <linus.walleij@linaro.org>
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+ *
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+ * License terms: GNU General Public License (GPL) version 2
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/kernel.h>
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+#include <linux/init.h>
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+#include <linux/err.h>
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+#include <linux/i2c.h>
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+#include <linux/platform_device.h>
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+#include <linux/regulator/driver.h>
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+#include <linux/mfd/core.h>
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+#include <linux/mfd/tps6105x.h>
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+
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+static const int tps6105x_voltages[] = {
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+ 4500000,
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+ 5000000,
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+ 5250000,
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+ 5000000, /* There is an additional 5V */
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+};
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+
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+static int tps6105x_regulator_enable(struct regulator_dev *rdev)
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+{
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+ struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
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+ int ret;
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+
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+ /* Activate voltage mode */
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+ ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
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+ TPS6105X_REG0_MODE_MASK,
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+ TPS6105X_REG0_MODE_VOLTAGE << TPS6105X_REG0_MODE_SHIFT);
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+ if (ret)
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+ return ret;
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+
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+ return 0;
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+}
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+
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+static int tps6105x_regulator_disable(struct regulator_dev *rdev)
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+{
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+ struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
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+ int ret;
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+
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+ /* Set into shutdown mode */
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+ ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
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+ TPS6105X_REG0_MODE_MASK,
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+ TPS6105X_REG0_MODE_SHUTDOWN << TPS6105X_REG0_MODE_SHIFT);
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+ if (ret)
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+ return ret;
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+
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+ return 0;
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+}
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+
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+static int tps6105x_regulator_is_enabled(struct regulator_dev *rdev)
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+{
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+ struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
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+ u8 regval;
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+ int ret;
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+
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+ ret = tps6105x_get(tps6105x, TPS6105X_REG_0, ®val);
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+ if (ret)
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+ return ret;
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+ regval &= TPS6105X_REG0_MODE_MASK;
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+ regval >>= TPS6105X_REG0_MODE_SHIFT;
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+
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+ if (regval == TPS6105X_REG0_MODE_VOLTAGE)
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+ return 1;
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+
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+ return 0;
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+}
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+
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+static int tps6105x_regulator_get_voltage_sel(struct regulator_dev *rdev)
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+{
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+ struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
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+ u8 regval;
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+ int ret;
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+
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+ ret = tps6105x_get(tps6105x, TPS6105X_REG_0, ®val);
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+ if (ret)
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+ return ret;
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+
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+ regval &= TPS6105X_REG0_VOLTAGE_MASK;
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+ regval >>= TPS6105X_REG0_VOLTAGE_SHIFT;
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+ return (int) regval;
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+}
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+
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+static int tps6105x_regulator_set_voltage_sel(struct regulator_dev *rdev,
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+ unsigned selector)
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+{
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+ struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
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+ int ret;
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+
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+ ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
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+ TPS6105X_REG0_VOLTAGE_MASK,
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+ selector << TPS6105X_REG0_VOLTAGE_SHIFT);
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+ if (ret)
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+ return ret;
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+
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+ return 0;
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+}
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+
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+static int tps6105x_regulator_list_voltage(struct regulator_dev *rdev,
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+ unsigned selector)
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+{
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+ if (selector >= ARRAY_SIZE(tps6105x_voltages))
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+ return -EINVAL;
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+
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+ return tps6105x_voltages[selector];
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+}
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+
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+static struct regulator_ops tps6105x_regulator_ops = {
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+ .enable = tps6105x_regulator_enable,
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+ .disable = tps6105x_regulator_disable,
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+ .is_enabled = tps6105x_regulator_is_enabled,
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+ .get_voltage_sel = tps6105x_regulator_get_voltage_sel,
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+ .set_voltage_sel = tps6105x_regulator_set_voltage_sel,
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+ .list_voltage = tps6105x_regulator_list_voltage,
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+};
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+
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+static struct regulator_desc tps6105x_regulator_desc = {
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+ .name = "tps6105x-boost",
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+ .ops = &tps6105x_regulator_ops,
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+ .type = REGULATOR_VOLTAGE,
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+ .id = 0,
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+ .owner = THIS_MODULE,
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+ .n_voltages = ARRAY_SIZE(tps6105x_voltages),
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+};
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+
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+/*
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+ * Registers the chip as a voltage regulator
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+ */
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+static int __devinit tps6105x_regulator_probe(struct platform_device *pdev)
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+{
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+ struct tps6105x *tps6105x = mfd_get_data(pdev);
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+ struct tps6105x_platform_data *pdata = tps6105x->pdata;
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+ int ret;
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+
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+ /* This instance is not set for regulator mode so bail out */
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+ if (pdata->mode != TPS6105X_MODE_VOLTAGE) {
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+ dev_info(&pdev->dev,
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+ "chip not in voltage mode mode, exit probe \n");
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+ return 0;
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+ }
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+
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+ /* Register regulator with framework */
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+ tps6105x->regulator = regulator_register(&tps6105x_regulator_desc,
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+ &tps6105x->client->dev,
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+ pdata->regulator_data, tps6105x);
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+ if (IS_ERR(tps6105x->regulator)) {
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+ ret = PTR_ERR(tps6105x->regulator);
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+ dev_err(&tps6105x->client->dev,
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+ "failed to register regulator\n");
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+ return ret;
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+ }
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+
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+ return 0;
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+}
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+
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+static int __devexit tps6105x_regulator_remove(struct platform_device *pdev)
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+{
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+ struct tps6105x *tps6105x = platform_get_drvdata(pdev);
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+ regulator_unregister(tps6105x->regulator);
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+ return 0;
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+}
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+
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+static struct platform_driver tps6105x_regulator_driver = {
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+ .driver = {
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+ .name = "tps6105x-regulator",
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+ .owner = THIS_MODULE,
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+ },
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+ .probe = tps6105x_regulator_probe,
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+ .remove = __devexit_p(tps6105x_regulator_remove),
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+};
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+
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+static __init int tps6105x_regulator_init(void)
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+{
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+ return platform_driver_register(&tps6105x_regulator_driver);
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+}
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+subsys_initcall(tps6105x_regulator_init);
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+
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+static __exit void tps6105x_regulator_exit(void)
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+{
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+ platform_driver_unregister(&tps6105x_regulator_driver);
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+}
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+module_exit(tps6105x_regulator_exit);
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+
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+MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
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+MODULE_DESCRIPTION("TPS6105x regulator driver");
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+MODULE_LICENSE("GPL v2");
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+MODULE_ALIAS("platform:tps6105x-regulator");
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