mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 13:13:57 +08:00
4740f73fe5
CONFIG_HOTPLUG is going away as an option so __devexit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> Cc: Peter Tyser <ptyser@xes-inc.com> Cc: Daniel Walker <dwalker@fifo99.com> Cc: Bryan Huntsman <bryanh@codeaurora.org> Acked-by: David Brown <davidb@codeaurora.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
248 lines
5.5 KiB
C
248 lines
5.5 KiB
C
/*
|
|
* 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 tps6105x_startup(struct tps6105x *tps6105x)
|
|
{
|
|
int ret;
|
|
u8 regval;
|
|
|
|
ret = tps6105x_get(tps6105x, TPS6105X_REG_0, ®val);
|
|
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 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].platform_data = tps6105x;
|
|
tps6105x_cells[i].pdata_size = sizeof(*tps6105x);
|
|
}
|
|
|
|
ret = mfd_add_devices(&client->dev, 0, tps6105x_cells,
|
|
ARRAY_SIZE(tps6105x_cells), NULL, 0, NULL);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
kfree(tps6105x);
|
|
return ret;
|
|
}
|
|
|
|
static int 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 = 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");
|