mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
1b92c1cf6b
This patch converts the drivers in drivers/input/* to use the module_i2c_driver() macro which makes the code smaller and a bit simpler. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
109 lines
2.4 KiB
C
109 lines
2.4 KiB
C
/*
|
|
* AD7879-1/AD7889-1 touchscreen (I2C bus)
|
|
*
|
|
* Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc.
|
|
*
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
#include <linux/input.h> /* BUS_I2C */
|
|
#include <linux/i2c.h>
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/pm.h>
|
|
|
|
#include "ad7879.h"
|
|
|
|
#define AD7879_DEVID 0x79 /* AD7879-1/AD7889-1 */
|
|
|
|
/* All registers are word-sized.
|
|
* AD7879 uses a high-byte first convention.
|
|
*/
|
|
static int ad7879_i2c_read(struct device *dev, u8 reg)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
|
|
return i2c_smbus_read_word_swapped(client, reg);
|
|
}
|
|
|
|
static int ad7879_i2c_multi_read(struct device *dev,
|
|
u8 first_reg, u8 count, u16 *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
u8 idx;
|
|
|
|
i2c_smbus_read_i2c_block_data(client, first_reg, count * 2, (u8 *)buf);
|
|
|
|
for (idx = 0; idx < count; ++idx)
|
|
buf[idx] = swab16(buf[idx]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ad7879_i2c_write(struct device *dev, u8 reg, u16 val)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
|
|
return i2c_smbus_write_word_swapped(client, reg, val);
|
|
}
|
|
|
|
static const struct ad7879_bus_ops ad7879_i2c_bus_ops = {
|
|
.bustype = BUS_I2C,
|
|
.read = ad7879_i2c_read,
|
|
.multi_read = ad7879_i2c_multi_read,
|
|
.write = ad7879_i2c_write,
|
|
};
|
|
|
|
static int __devinit ad7879_i2c_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct ad7879 *ts;
|
|
|
|
if (!i2c_check_functionality(client->adapter,
|
|
I2C_FUNC_SMBUS_WORD_DATA)) {
|
|
dev_err(&client->dev, "SMBUS Word Data not Supported\n");
|
|
return -EIO;
|
|
}
|
|
|
|
ts = ad7879_probe(&client->dev, AD7879_DEVID, client->irq,
|
|
&ad7879_i2c_bus_ops);
|
|
if (IS_ERR(ts))
|
|
return PTR_ERR(ts);
|
|
|
|
i2c_set_clientdata(client, ts);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devexit ad7879_i2c_remove(struct i2c_client *client)
|
|
{
|
|
struct ad7879 *ts = i2c_get_clientdata(client);
|
|
|
|
ad7879_remove(ts);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id ad7879_id[] = {
|
|
{ "ad7879", 0 },
|
|
{ "ad7889", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, ad7879_id);
|
|
|
|
static struct i2c_driver ad7879_i2c_driver = {
|
|
.driver = {
|
|
.name = "ad7879",
|
|
.owner = THIS_MODULE,
|
|
.pm = &ad7879_pm_ops,
|
|
},
|
|
.probe = ad7879_i2c_probe,
|
|
.remove = __devexit_p(ad7879_i2c_remove),
|
|
.id_table = ad7879_id,
|
|
};
|
|
|
|
module_i2c_driver(ad7879_i2c_driver);
|
|
|
|
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
|
|
MODULE_DESCRIPTION("AD7879(-1) touchscreen I2C bus driver");
|
|
MODULE_LICENSE("GPL");
|