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V4L/DVB (13601): radio-si470x: support PM functions 

This patch is to support PM of the si470x i2c driver.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Acked-by: Tobias Lorenz <tobias.lorenz@gmx.net>
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Joonyoung Shim 2009-12-10 16:52:50 -03:00 committed by Mauro Carvalho Chehab
parent fe2137dd4e
commit d1471f02df
1 changed files with 40 additions and 0 deletions
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40
drivers/media/radio/si470x/radio-si470x-i2c.c
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@ -487,6 +487,44 @@ static __devexit int si470x_i2c_remove(struct i2c_client *client)
}
#ifdef CONFIG_PM
/*
* si470x_i2c_suspend - suspend the device
*/
static int si470x_i2c_suspend(struct i2c_client *client, pm_message_t mesg)
{
struct si470x_device *radio = i2c_get_clientdata(client);
/* power down */
radio->registers[POWERCFG] |= POWERCFG_DISABLE;
if (si470x_set_register(radio, POWERCFG) < 0)
return -EIO;
return 0;
}
/*
* si470x_i2c_resume - resume the device
*/
static int si470x_i2c_resume(struct i2c_client *client)
{
struct si470x_device *radio = i2c_get_clientdata(client);
/* power up : need 110ms */
radio->registers[POWERCFG] |= POWERCFG_ENABLE;
if (si470x_set_register(radio, POWERCFG) < 0)
return -EIO;
msleep(110);
return 0;
}
#else
#define si470x_i2c_suspend NULL
#define si470x_i2c_resume NULL
#endif
/*
* si470x_i2c_driver - i2c driver interface
*/
@ -497,6 +535,8 @@ static struct i2c_driver si470x_i2c_driver = {
},
.probe = si470x_i2c_probe,
.remove = __devexit_p(si470x_i2c_remove),
.suspend = si470x_i2c_suspend,
.resume = si470x_i2c_resume,
.id_table = si470x_i2c_id,
};