OpenSDV
/
linux-stable-rt
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

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>
This commit is contained in:
Linus Walleij 2011-03-09 12:02:55 +00:00 committed by Samuel Ortiz
parent 798a8eee44
commit 2edd3b6924
5 changed files with 214 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/mfd/Kconfig
View File

@ -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

9
drivers/regulator/Kconfig
View File

@ -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

2
drivers/regulator/Makefile
View File

@ -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

196
drivers/regulator/tps6105x-regulator.c Normal file
View File

@ -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");

6
include/linux/mfd/tps6105x.h
View File

@ -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);