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Message-ID: <1299577320-31389-1-git-send-email-linus.walleij@stericsson.com>
Date: Tue, 8 Mar 2011 10:42:00 +0100
From: Linus Walleij <linus.walleij@...ricsson.com>
To: Liam Girdwood <lrg@...mlogic.co.uk>,
Mark Brown <broonie@...nsource.wolfsonmicro.com>,
<linux-kernel@...r.kernel.org>
Cc: Lee Jones <lee.jones@...aro.org>,
Linus Walleij <linus.walleij@...aro.org>,
Samuel Ortiz <samuel.ortiz@...el.com>,
Ola Lilja <ola.o.lilja@...ricsson.com>
Subject: [PATCH 2/3] regulator: add a subdriver for TI TPS6105x regulator portions
From: Linus Walleij <linus.walleij@...aro.org>
This adds a subdriver for the regulator found inside the TPS61050
and TPS61052 chips.
Cc: Samuel Ortiz <samuel.ortiz@...el.com>
Cc: Ola Lilja <ola.o.lilja@...ricsson.com>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
drivers/regulator/Kconfig | 9 ++
drivers/regulator/Makefile | 2 +-
drivers/regulator/tps6105x-regulator.c | 220 ++++++++++++++++++++++++++++++++
3 files changed, 230 insertions(+), 1 deletions(-)
create mode 100644 drivers/regulator/tps6105x-regulator.c
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index e1d9436..0e52301 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -214,6 +214,15 @@ 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 0b5e88c..1d797c7 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -33,7 +33,7 @@ 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..682ef25
--- /dev/null
+++ b/drivers/regulator/tps6105x-regulator.c
@@ -0,0 +1,220 @@
+/*
+ * 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
+ *
+ * Author: Linus Walleij <linus.walleij@...aro.org> for ST-Ericsson
+ *
+ * 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/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(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 tps6105x_voltages[regval];
+}
+
+static int tps6105x_regulator_set_voltage(struct regulator_dev *rdev,
+ int min_uV, int max_uV,
+ unsigned *selector)
+{
+ struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
+ int ret;
+ int i;
+
+ /* Look up a good voltage */
+ for (i = 0; i < ARRAY_SIZE(tps6105x_voltages)-1; i++) {
+ if ((tps6105x_voltages[i] >= min_uV) &&
+ (tps6105x_voltages[i] <= max_uV)) {
+ *selector = i;
+ /* Set it */
+ ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
+ TPS6105X_REG0_VOLTAGE_MASK,
+ i << TPS6105X_REG0_VOLTAGE_SHIFT);
+ if (ret)
+ return ret;
+ }
+ }
+ dev_err(rdev_get_dev(rdev),
+ "no good voltage available\n");
+ return -EINVAL;
+}
+
+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 = tps6105x_regulator_get_voltage,
+ .set_voltage = tps6105x_regulator_set_voltage,
+ .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 = platform_get_drvdata(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)
+ return 0;
+
+ /* Set lowest voltage 4.5V to begin */
+ ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
+ TPS6105X_REG0_VOLTAGE_MASK,
+ TPS6105X_REG0_VOLTAGE_450 << TPS6105X_REG0_VOLTAGE_SHIFT);
+ if (ret)
+ return ret;
+
+#if 0
+ /* Activate voltage mode - use to check if voltage comes out */
+ 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;
+#endif
+
+ /* 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);
+}
+
+static __exit void tps6105x_regulator_exit(void)
+{
+ platform_driver_unregister(&tps6105x_regulator_driver);
+}
+
+subsys_initcall(tps6105x_regulator_init);
+module_exit(tps6105x_regulator_exit);
+
+MODULE_AUTHOR("Linus Walleij <linus.walleij@...aro.org>");
+MODULE_DESCRIPTION("TPS6105x regulator driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:tps6105x-regulator");
--
1.7.3.2
--
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