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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>
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@ -132,6 +132,8 @@ config UCB1400_CORE
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config TPS6105X
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tristate "TPS61050/61052 Boost Converters"
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depends on I2C
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select REGULATOR
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select REGULATOR_FIXED_VOLTAGE
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help
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This option enables a driver for the TP61050/TPS61052
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high-power "white LED driver". This boost converter is
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@ -223,6 +223,15 @@ config REGULATOR_AB3100
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AB3100 analog baseband dealing with power regulators
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for the system.
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config REGULATOR_TPS6105X
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tristate "TI TPS6105X Power regulators"
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depends on TPS6105X
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default y if TPS6105X
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help
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This driver supports TPS61050/TPS61052 voltage regulator chips.
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It is a single boost converter primarily for white LEDs and
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audio amplifiers.
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config REGULATOR_TPS65023
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tristate "TI TPS65023 Power regulators"
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depends on I2C
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@ -34,7 +34,7 @@ obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o
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obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o
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obj-$(CONFIG_REGULATOR_MC13XXX_CORE) += mc13xxx-regulator-core.o
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obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o
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obj-$(CONFIG_REGULATOR_TPS6105X) += tps6105x-regulator.o
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obj-$(CONFIG_REGULATOR_TPS65023) += tps65023-regulator.o
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obj-$(CONFIG_REGULATOR_TPS6507X) += tps6507x-regulator.o
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obj-$(CONFIG_REGULATOR_TPS6524X) += tps6524x-regulator.o
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196
drivers/regulator/tps6105x-regulator.c
Normal file
196
drivers/regulator/tps6105x-regulator.c
Normal file
@ -0,0 +1,196 @@
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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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#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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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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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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/* 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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return 0;
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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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/* 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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return 0;
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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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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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if (regval == TPS6105X_REG0_MODE_VOLTAGE)
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return 1;
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return 0;
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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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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_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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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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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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return 0;
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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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return tps6105x_voltages[selector];
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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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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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* 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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/* 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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/* 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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return 0;
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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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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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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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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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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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#define MFD_TPS6105X_H
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#include <linux/i2c.h>
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#include <linux/regulator/machine.h>
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/*
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* Register definitions to all subdrivers
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@ -71,20 +72,25 @@ enum tps6105x_mode {
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* struct tps6105x_platform_data - TPS61905x platform data
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* @mode: what mode this instance shall be operated in,
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* this is not selectable at runtime
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* @regulator_data: initialization data for the voltage
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* regulator if used as a voltage source
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*/
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struct tps6105x_platform_data {
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enum tps6105x_mode mode;
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struct regulator_init_data *regulator_data;
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};
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/**
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* struct tps6105x - state holder for the TPS6105x drivers
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* @mutex: mutex to serialize I2C accesses
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* @i2c_client: corresponding I2C client
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* @regulator: regulator device if used in voltage mode
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*/
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struct tps6105x {
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struct tps6105x_platform_data *pdata;
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struct mutex lock;
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struct i2c_client *client;
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struct regulator_dev *regulator;
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};
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extern int tps6105x_set(struct tps6105x *tps6105x, u8 reg, u8 value);
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