--- /dev/null
+/*
+ * 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>
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps6105x.h>
+
+static const int tps6105x_voltages[] = {
+ 4500000,
+ 5000000,
+ 5250000,
+ 5000000, /* There is an additional 5V */
+};
+
+static int tps6105x_regulator_enable(struct regulator_dev *rdev)
+{
+ struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
+ int ret;
+
+ /* Activate voltage mode */
+ ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
+ TPS6105X_REG0_MODE_MASK,
+ TPS6105X_REG0_MODE_VOLTAGE << TPS6105X_REG0_MODE_SHIFT);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int tps6105x_regulator_disable(struct regulator_dev *rdev)
+{
+ struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
+ int ret;
+
+ /* Set into shutdown mode */
+ ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
+ TPS6105X_REG0_MODE_MASK,
+ TPS6105X_REG0_MODE_SHUTDOWN << TPS6105X_REG0_MODE_SHIFT);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int tps6105x_regulator_is_enabled(struct regulator_dev *rdev)
+{
+ struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
+ u8 regval;
+ int ret;
+
+ ret = tps6105x_get(tps6105x, TPS6105X_REG_0, ®val);
+ if (ret)
+ return ret;
+ regval &= TPS6105X_REG0_MODE_MASK;
+ regval >>= TPS6105X_REG0_MODE_SHIFT;
+
+ if (regval == TPS6105X_REG0_MODE_VOLTAGE)
+ return 1;
+
+ return 0;
+}
+
+static int tps6105x_regulator_get_voltage_sel(struct regulator_dev *rdev)
+{
+ struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
+ u8 regval;
+ int ret;
+
+ ret = tps6105x_get(tps6105x, TPS6105X_REG_0, ®val);
+ if (ret)
+ return ret;
+
+ regval &= TPS6105X_REG0_VOLTAGE_MASK;
+ regval >>= TPS6105X_REG0_VOLTAGE_SHIFT;
+ return (int) regval;
+}
+
+static int tps6105x_regulator_set_voltage_sel(struct regulator_dev *rdev,
+ unsigned selector)
+{
+ struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
+ int ret;
+
+ ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
+ TPS6105X_REG0_VOLTAGE_MASK,
+ selector << TPS6105X_REG0_VOLTAGE_SHIFT);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int tps6105x_regulator_list_voltage(struct regulator_dev *rdev,
+ unsigned selector)
+{
+ if (selector >= ARRAY_SIZE(tps6105x_voltages))
+ return -EINVAL;
+
+ return tps6105x_voltages[selector];
+}
+
+static struct regulator_ops tps6105x_regulator_ops = {
+ .enable = tps6105x_regulator_enable,
+ .disable = tps6105x_regulator_disable,
+ .is_enabled = tps6105x_regulator_is_enabled,
+ .get_voltage_sel = tps6105x_regulator_get_voltage_sel,
+ .set_voltage_sel = tps6105x_regulator_set_voltage_sel,
+ .list_voltage = tps6105x_regulator_list_voltage,
+};
+
+static struct regulator_desc tps6105x_regulator_desc = {
+ .name = "tps6105x-boost",
+ .ops = &tps6105x_regulator_ops,
+ .type = REGULATOR_VOLTAGE,
+ .id = 0,
+ .owner = THIS_MODULE,
+ .n_voltages = ARRAY_SIZE(tps6105x_voltages),
+};
+
+/*
+ * Registers the chip as a voltage regulator
+ */
+static int __devinit tps6105x_regulator_probe(struct platform_device *pdev)
+{
+ struct tps6105x *tps6105x = mfd_get_data(pdev);
+ struct tps6105x_platform_data *pdata = tps6105x->pdata;
+ 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;
+ }
+
+ /* Register regulator with framework */
+ tps6105x->regulator = regulator_register(&tps6105x_regulator_desc,
+ &tps6105x->client->dev,
+ pdata->regulator_data, tps6105x);
+ if (IS_ERR(tps6105x->regulator)) {
+ ret = PTR_ERR(tps6105x->regulator);
+ dev_err(&tps6105x->client->dev,
+ "failed to register regulator\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int __devexit tps6105x_regulator_remove(struct platform_device *pdev)
+{
+ struct tps6105x *tps6105x = platform_get_drvdata(pdev);
+ regulator_unregister(tps6105x->regulator);
+ return 0;
+}
+
+static struct platform_driver tps6105x_regulator_driver = {
+ .driver = {
+ .name = "tps6105x-regulator",
+ .owner = THIS_MODULE,
+ },
+ .probe = tps6105x_regulator_probe,
+ .remove = __devexit_p(tps6105x_regulator_remove),
+};
+
+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 <linus.walleij@linaro.org>");
+MODULE_DESCRIPTION("TPS6105x regulator driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:tps6105x-regulator");
git.openpandora.org / pandora-kernel.git / commitdiff