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[media] a8293: implement I2C client bindings 

Implement I2C client bindings.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Antti Palosaari 2015-04-16 13:28:39 -03:00 committed by Mauro Carvalho Chehab
parent d69abb79e1
commit b561baec11
2 changed files with 99 additions and 3 deletions
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87
drivers/media/dvb-frontends/a8293.c
View File

@ -22,8 +22,9 @@
#include "a8293.h"
struct a8293_priv {
u8 i2c_addr;
struct i2c_adapter *i2c;
const struct a8293_config *cfg;
struct i2c_client *client;
u8 reg[2];
};
@ -32,7 +33,7 @@ static int a8293_i2c(struct a8293_priv *priv, u8 *val, int len, bool rd)
int ret;
struct i2c_msg msg[1] = {
{
.addr = priv->cfg->i2c_addr,
.addr = priv->i2c_addr,
.len = len,
.buf = val,
}
@ -128,7 +129,7 @@ struct dvb_frontend *a8293_attach(struct dvb_frontend *fe,
/* setup the priv */
priv->i2c = i2c;
priv->cfg = cfg;
priv->i2c_addr = cfg->i2c_addr;
fe->sec_priv = priv;
/* check if the SEC is there */
@ -164,6 +165,86 @@ err:
}
EXPORT_SYMBOL(a8293_attach);
static int a8293_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct a8293_priv *dev;
struct a8293_platform_data *pdata = client->dev.platform_data;
struct dvb_frontend *fe = pdata->dvb_frontend;
int ret;
u8 buf[2];
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev) {
ret = -ENOMEM;
goto err;
}
dev->client = client;
dev->i2c = client->adapter;
dev->i2c_addr = client->addr;
/* check if the SEC is there */
ret = a8293_rd(dev, buf, 2);
if (ret)
goto err_kfree;
/* ENB=0 */
dev->reg[0] = 0x10;
ret = a8293_wr(dev, &dev->reg[0], 1);
if (ret)
goto err_kfree;
/* TMODE=0, TGATE=1 */
dev->reg[1] = 0x82;
ret = a8293_wr(dev, &dev->reg[1], 1);
if (ret)
goto err_kfree;
/* override frontend ops */
fe->ops.set_voltage = a8293_set_voltage;
fe->sec_priv = dev;
i2c_set_clientdata(client, dev);
dev_info(&client->dev, "Allegro A8293 SEC successfully attached\n");
return 0;
err_kfree:
kfree(dev);
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int a8293_remove(struct i2c_client *client)
{
struct a8293_dev *dev = i2c_get_clientdata(client);
dev_dbg(&client->dev, "\n");
kfree(dev);
return 0;
}
static const struct i2c_device_id a8293_id_table[] = {
{"a8293", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, a8293_id_table);
static struct i2c_driver a8293_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "a8293",
.suppress_bind_attrs = true,
},
.probe = a8293_probe,
.remove = a8293_remove,
.id_table = a8293_id_table,
};
module_i2c_driver(a8293_driver);
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_DESCRIPTION("Allegro A8293 SEC driver");
MODULE_LICENSE("GPL");

15
drivers/media/dvb-frontends/a8293.h
View File

@ -21,8 +21,23 @@
#ifndef A8293_H
#define A8293_H
#include "dvb_frontend.h"
#include <linux/kconfig.h>
/*
* I2C address
* 0x08, 0x09, 0x0a, 0x0b
*/
/**
* struct a8293_platform_data - Platform data for the a8293 driver
* @dvb_frontend: DVB frontend.
*/
struct a8293_platform_data {
struct dvb_frontend *dvb_frontend;
};
struct a8293_config {
u8 i2c_addr;
};