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authorLinus Walleij <linus.walleij@linaro.org>2011-03-09 12:02:55 +0000
committerSamuel Ortiz <sameo@linux.intel.com>2011-03-23 10:42:09 +0100
commit2edd3b692404efc2d3915175a2ed553e783de763 (patch)
treec2a6d4632ec08b567c24e345d638e656462c0135
parent798a8eee44da56b4f2e000ff81dfb49d09c65b71 (diff)
downloadop-kernel-dev-2edd3b692404efc2d3915175a2ed553e783de763.zip
op-kernel-dev-2edd3b692404efc2d3915175a2ed553e783de763.tar.gz
regulator: Add a subdriver for TI TPS6105x regulator portions v2
This adds a subdriver for the regulator found inside the TPS61050 and TPS61052 chips. Cc: Samuel Ortiz <samuel.ortiz@intel.com> Cc: Ola Lilja <ola.o.lilja@stericsson.com> Cc: Jonas Aberg <jonas.aberg@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
-rw-r--r--drivers/mfd/Kconfig2
-rw-r--r--drivers/regulator/Kconfig9
-rw-r--r--drivers/regulator/Makefile2
-rw-r--r--drivers/regulator/tps6105x-regulator.c196
-rw-r--r--include/linux/mfd/tps6105x.h6
5 files changed, 214 insertions, 1 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index bc99288..8d7d098 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -132,6 +132,8 @@ config UCB1400_CORE
config TPS6105X
tristate "TPS61050/61052 Boost Converters"
depends on I2C
+ select REGULATOR
+ select REGULATOR_FIXED_VOLTAGE
help
This option enables a driver for the TP61050/TPS61052
high-power "white LED driver". This boost converter is
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 395d359..de75f67 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -223,6 +223,15 @@ config REGULATOR_AB3100
AB3100 analog baseband dealing with power regulators
for the system.
+config REGULATOR_TPS6105X
+ tristate "TI TPS6105X Power regulators"
+ depends on TPS6105X
+ default y if TPS6105X
+ help
+ This driver supports TPS61050/TPS61052 voltage regulator chips.
+ It is a single boost converter primarily for white LEDs and
+ audio amplifiers.
+
config REGULATOR_TPS65023
tristate "TI TPS65023 Power regulators"
depends on I2C
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index e43b852..d72a427 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -34,7 +34,7 @@ obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o
obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o
obj-$(CONFIG_REGULATOR_MC13XXX_CORE) += mc13xxx-regulator-core.o
obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o
-
+obj-$(CONFIG_REGULATOR_TPS6105X) += tps6105x-regulator.o
obj-$(CONFIG_REGULATOR_TPS65023) += tps65023-regulator.o
obj-$(CONFIG_REGULATOR_TPS6507X) += tps6507x-regulator.o
obj-$(CONFIG_REGULATOR_TPS6524X) += tps6524x-regulator.o
diff --git a/drivers/regulator/tps6105x-regulator.c b/drivers/regulator/tps6105x-regulator.c
new file mode 100644
index 0000000..1661499
--- /dev/null
+++ b/drivers/regulator/tps6105x-regulator.c
@@ -0,0 +1,196 @@
+/*
+ * 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, &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 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");
diff --git a/include/linux/mfd/tps6105x.h b/include/linux/mfd/tps6105x.h
index f259244..386743d 100644
--- a/include/linux/mfd/tps6105x.h
+++ b/include/linux/mfd/tps6105x.h
@@ -10,6 +10,7 @@
#define MFD_TPS6105X_H
#include <linux/i2c.h>
+#include <linux/regulator/machine.h>
/*
* Register definitions to all subdrivers
@@ -71,20 +72,25 @@ enum tps6105x_mode {
* struct tps6105x_platform_data - TPS61905x platform data
* @mode: what mode this instance shall be operated in,
* this is not selectable at runtime
+ * @regulator_data: initialization data for the voltage
+ * regulator if used as a voltage source
*/
struct tps6105x_platform_data {
enum tps6105x_mode mode;
+ struct regulator_init_data *regulator_data;
};
/**
* struct tps6105x - state holder for the TPS6105x drivers
* @mutex: mutex to serialize I2C accesses
* @i2c_client: corresponding I2C client
+ * @regulator: regulator device if used in voltage mode
*/
struct tps6105x {
struct tps6105x_platform_data *pdata;
struct mutex lock;
struct i2c_client *client;
+ struct regulator_dev *regulator;
};
extern int tps6105x_set(struct tps6105x *tps6105x, u8 reg, u8 value);
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