From d1471f02dfb5b3424ee3afb6459d8cb97730af76 Mon Sep 17 00:00:00 2001 From: Joonyoung Shim Date: Thu, 10 Dec 2009 16:52:50 -0300 Subject: V4L/DVB (13601): radio-si470x: support PM functions This patch is to support PM of the si470x i2c driver. Signed-off-by: Joonyoung Shim Acked-by: Tobias Lorenz Signed-off-by: Douglas Schilling Landgraf Signed-off-by: Mauro Carvalho Chehab --- drivers/media/radio/si470x/radio-si470x-i2c.c | 40 +++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) (limited to 'drivers/media/radio/si470x/radio-si470x-i2c.c') diff --git a/drivers/media/radio/si470x/radio-si470x-i2c.c b/drivers/media/radio/si470x/radio-si470x-i2c.c index b8c0d5cda2f6..5466015346a1 100644 --- a/drivers/media/radio/si470x/radio-si470x-i2c.c +++ b/drivers/media/radio/si470x/radio-si470x-i2c.c @@ -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, }; -- cgit v1.2.3