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mfd: Add a core driver for TI TPS61050/TPS61052 chips v2 

The TPS61050/TPS61052 are boost converters, LED drivers, LED flash
drivers and a simple GPIO pin chips.

Cc: Liam Girdwood <lrg@slimlogic.co.uk>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Jonas Aberg <jonas.aberg@stericsson.com>
Cc: Ola Lilja <ola.o.lilja@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Linus Walleij 2011-03-09 13:02:38 +01:00 committed by Samuel Ortiz
parent f04ddfcd24
commit 798a8eee44
4 changed files with 351 additions and 0 deletions
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9
drivers/mfd/Kconfig
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@ -129,6 +129,15 @@ config UCB1400_CORE
To compile this driver as a module, choose M here: the
module will be called ucb1400_core.
config TPS6105X
tristate "TPS61050/61052 Boost Converters"
depends on I2C
help
This option enables a driver for the TP61050/TPS61052
high-power "white LED driver". This boost converter is
sometimes used for other things than white LEDs, and
also contains a GPIO pin.
config TPS65010
tristate "TPS6501x Power Management chips"
depends on I2C && GPIOLIB

1
drivers/mfd/Makefile
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@ -33,6 +33,7 @@ obj-$(CONFIG_MFD_WM8350) += wm8350.o
obj-$(CONFIG_MFD_WM8350_I2C) += wm8350-i2c.o
obj-$(CONFIG_MFD_WM8994) += wm8994-core.o wm8994-irq.o
obj-$(CONFIG_TPS6105X) += tps6105x.o
obj-$(CONFIG_TPS65010) += tps65010.o
obj-$(CONFIG_TPS6507X) += tps6507x.o
obj-$(CONFIG_MENELAUS) += menelaus.o

246
drivers/mfd/tps6105x.c Normal file
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@ -0,0 +1,246 @@
/*
* Core driver for TPS61050/61052 boost converters, used for while LED
* driving, audio power amplification, white LED flash, and generic
* boost conversion. Additionally it provides a 1-bit GPIO pin (out or in)
* and a flash synchronization pin to synchronize flash events when used as
* flashgun.
*
* 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/init.h>
#include <linux/i2c.h>
#include <linux/mutex.h>
#include <linux/gpio.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/regulator/driver.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps6105x.h>
int tps6105x_set(struct tps6105x *tps6105x, u8 reg, u8 value)
{
int ret;
ret = mutex_lock_interruptible(&tps6105x->lock);
if (ret)
return ret;
ret = i2c_smbus_write_byte_data(tps6105x->client, reg, value);
mutex_unlock(&tps6105x->lock);
if (ret < 0)
return ret;
return 0;
}
EXPORT_SYMBOL(tps6105x_set);
int tps6105x_get(struct tps6105x *tps6105x, u8 reg, u8 *buf)
{
int ret;
ret = mutex_lock_interruptible(&tps6105x->lock);
if (ret)
return ret;
ret = i2c_smbus_read_byte_data(tps6105x->client, reg);
mutex_unlock(&tps6105x->lock);
if (ret < 0)
return ret;
*buf = ret;
return 0;
}
EXPORT_SYMBOL(tps6105x_get);
/*
* Masks off the bits in the mask and sets the bits in the bitvalues
* parameter in one atomic operation
*/
int tps6105x_mask_and_set(struct tps6105x *tps6105x, u8 reg,
u8 bitmask, u8 bitvalues)
{
int ret;
u8 regval;
ret = mutex_lock_interruptible(&tps6105x->lock);
if (ret)
return ret;
ret = i2c_smbus_read_byte_data(tps6105x->client, reg);
if (ret < 0)
goto fail;
regval = ret;
regval = (~bitmask & regval) | (bitmask & bitvalues);
ret = i2c_smbus_write_byte_data(tps6105x->client, reg, regval);
fail:
mutex_unlock(&tps6105x->lock);
if (ret < 0)
return ret;
return 0;
}
EXPORT_SYMBOL(tps6105x_mask_and_set);
static int __devinit tps6105x_startup(struct tps6105x *tps6105x)
{
int ret;
u8 regval;
ret = tps6105x_get(tps6105x, TPS6105X_REG_0, &regval);
if (ret)
return ret;
switch (regval >> TPS6105X_REG0_MODE_SHIFT) {
case TPS6105X_REG0_MODE_SHUTDOWN:
dev_info(&tps6105x->client->dev,
"TPS6105x found in SHUTDOWN mode\n");
break;
case TPS6105X_REG0_MODE_TORCH:
dev_info(&tps6105x->client->dev,
"TPS6105x found in TORCH mode\n");
break;
case TPS6105X_REG0_MODE_TORCH_FLASH:
dev_info(&tps6105x->client->dev,
"TPS6105x found in FLASH mode\n");
break;
case TPS6105X_REG0_MODE_VOLTAGE:
dev_info(&tps6105x->client->dev,
"TPS6105x found in VOLTAGE mode\n");
break;
default:
break;
}
return ret;
}
/*
* MFD cells - we have one cell which is selected operation
* mode, and we always have a GPIO cell.
*/
static struct mfd_cell tps6105x_cells[] = {
{
/* name will be runtime assigned */
.id = -1,
},
{
.name = "tps6105x-gpio",
.id = -1,
},
};
static int __devinit tps6105x_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct tps6105x *tps6105x;
struct tps6105x_platform_data *pdata;
int ret;
int i;
tps6105x = kmalloc(sizeof(*tps6105x), GFP_KERNEL);
if (!tps6105x)
return -ENOMEM;
i2c_set_clientdata(client, tps6105x);
tps6105x->client = client;
pdata = client->dev.platform_data;
tps6105x->pdata = pdata;
mutex_init(&tps6105x->lock);
ret = tps6105x_startup(tps6105x);
if (ret) {
dev_err(&client->dev, "chip initialization failed\n");
goto fail;
}
/* Remove warning texts when you implement new cell drivers */
switch (pdata->mode) {
case TPS6105X_MODE_SHUTDOWN:
dev_info(&client->dev,
"present, not used for anything, only GPIO\n");
break;
case TPS6105X_MODE_TORCH:
tps6105x_cells[0].name = "tps6105x-leds";
dev_warn(&client->dev,
"torch mode is unsupported\n");
break;
case TPS6105X_MODE_TORCH_FLASH:
tps6105x_cells[0].name = "tps6105x-flash";
dev_warn(&client->dev,
"flash mode is unsupported\n");
break;
case TPS6105X_MODE_VOLTAGE:
tps6105x_cells[0].name ="tps6105x-regulator";
break;
default:
break;
}
/* Set up and register the platform devices. */
for (i = 0; i < ARRAY_SIZE(tps6105x_cells); i++) {
/* One state holder for all drivers, this is simple */
tps6105x_cells[i].mfd_data = tps6105x;
}
ret = mfd_add_devices(&client->dev, 0, tps6105x_cells,
ARRAY_SIZE(tps6105x_cells), NULL, 0);
if (ret)
goto fail;
return 0;
fail:
kfree(tps6105x);
return ret;
}
static int __devexit tps6105x_remove(struct i2c_client *client)
{
struct tps6105x *tps6105x = i2c_get_clientdata(client);
mfd_remove_devices(&client->dev);
/* Put chip in shutdown mode */
tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
TPS6105X_REG0_MODE_MASK,
TPS6105X_MODE_SHUTDOWN << TPS6105X_REG0_MODE_SHIFT);
kfree(tps6105x);
return 0;
}
static const struct i2c_device_id tps6105x_id[] = {
{ "tps61050", 0 },
{ "tps61052", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tps6105x_id);
static struct i2c_driver tps6105x_driver = {
.driver = {
.name = "tps6105x",
},
.probe = tps6105x_probe,
.remove = __devexit_p(tps6105x_remove),
.id_table = tps6105x_id,
};
static int __init tps6105x_init(void)
{
return i2c_add_driver(&tps6105x_driver);
}
subsys_initcall(tps6105x_init);
static void __exit tps6105x_exit(void)
{
i2c_del_driver(&tps6105x_driver);
}
module_exit(tps6105x_exit);
MODULE_AUTHOR("Linus Walleij");
MODULE_DESCRIPTION("TPS6105x White LED Boost Converter Driver");
MODULE_LICENSE("GPL v2");

95
include/linux/mfd/tps6105x.h Normal file
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@ -0,0 +1,95 @@
/*
* 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
*/
#ifndef MFD_TPS6105X_H
#define MFD_TPS6105X_H
#include <linux/i2c.h>
/*
* Register definitions to all subdrivers
*/
#define TPS6105X_REG_0 0x00
#define TPS6105X_REG0_MODE_SHIFT 6
#define TPS6105X_REG0_MODE_MASK (0x03<<6)
/* These defines for both reg0 and reg1 */
#define TPS6105X_REG0_MODE_SHUTDOWN 0x00
#define TPS6105X_REG0_MODE_TORCH 0x01
#define TPS6105X_REG0_MODE_TORCH_FLASH 0x02
#define TPS6105X_REG0_MODE_VOLTAGE 0x03
#define TPS6105X_REG0_VOLTAGE_SHIFT 4
#define TPS6105X_REG0_VOLTAGE_MASK (3<<4)
#define TPS6105X_REG0_VOLTAGE_450 0
#define TPS6105X_REG0_VOLTAGE_500 1
#define TPS6105X_REG0_VOLTAGE_525 2
#define TPS6105X_REG0_VOLTAGE_500_2 3
#define TPS6105X_REG0_DIMMING_SHIFT 3
#define TPS6105X_REG0_TORCHC_SHIFT 0
#define TPS6105X_REG0_TORCHC_MASK (7<<0)
#define TPS6105X_REG0_TORCHC_0 0x00
#define TPS6105X_REG0_TORCHC_50 0x01
#define TPS6105X_REG0_TORCHC_75 0x02
#define TPS6105X_REG0_TORCHC_100 0x03
#define TPS6105X_REG0_TORCHC_150 0x04
#define TPS6105X_REG0_TORCHC_200 0x05
#define TPS6105X_REG0_TORCHC_250_400 0x06
#define TPS6105X_REG0_TORCHC_250_500 0x07
#define TPS6105X_REG_1 0x01
#define TPS6105X_REG1_MODE_SHIFT 6
#define TPS6105X_REG1_MODE_MASK (0x03<<6)
#define TPS6105X_REG1_MODE_SHUTDOWN 0x00
#define TPS6105X_REG1_MODE_TORCH 0x01
#define TPS6105X_REG1_MODE_TORCH_FLASH 0x02
#define TPS6105X_REG1_MODE_VOLTAGE 0x03
#define TPS6105X_REG_2 0x02
#define TPS6105X_REG_3 0x03
/**
* enum tps6105x_mode - desired mode for the TPS6105x
* @TPS6105X_MODE_SHUTDOWN: this instance is inactive, not used for anything
* @TPS61905X_MODE_TORCH: this instance is used as a LED, usually a while
* LED, for example as backlight or flashlight. If this is set, the
* TPS6105X will register to the LED framework
* @TPS6105X_MODE_TORCH_FLASH: this instance is used as a flashgun, usually
* in a camera
* @TPS6105X_MODE_VOLTAGE: this instance is used as a voltage regulator and
* will register to the regulator framework
*/
enum tps6105x_mode {
TPS6105X_MODE_SHUTDOWN,
TPS6105X_MODE_TORCH,
TPS6105X_MODE_TORCH_FLASH,
TPS6105X_MODE_VOLTAGE,
};
/**
* struct tps6105x_platform_data - TPS61905x platform data
* @mode: what mode this instance shall be operated in,
* this is not selectable at runtime
*/
struct tps6105x_platform_data {
enum tps6105x_mode mode;
};
/**
* struct tps6105x - state holder for the TPS6105x drivers
* @mutex: mutex to serialize I2C accesses
* @i2c_client: corresponding I2C client
*/
struct tps6105x {
struct tps6105x_platform_data *pdata;
struct mutex lock;
struct i2c_client *client;
};
extern int tps6105x_set(struct tps6105x *tps6105x, u8 reg, u8 value);
extern int tps6105x_get(struct tps6105x *tps6105x, u8 reg, u8 *buf);
extern int tps6105x_mask_and_set(struct tps6105x *tps6105x, u8 reg,
u8 bitmask, u8 bitvalues);
#endif