Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / regulator / tps6105x-regulator.c

diff --git a/kernel/drivers/regulator/tps6105x-regulator.c b/kernel/drivers/regulator/tps6105x-regulator.c
new file mode 100644 (file)
index 0000000..3510b3e
--- /dev/null
+++ b/kernel/drivers/regulator/tps6105x-regulator.c
@@ -0,0 +1,185 @@
+/*
+ * 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 unsigned 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, &regval);
+       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, &regval);
+       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 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   = regulator_list_voltage_table,
+};
+
+static const 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),
+       .volt_table     = tps6105x_voltages,
+};
+
+/*
+ * 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;
+
+       /* 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 = 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 <linus.walleij@linaro.org>");
+MODULE_DESCRIPTION("TPS6105x regulator driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:tps6105x-regulator");