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Commit a08c3781 authored by Antti Palosaari's avatar Antti Palosaari Committed by Mauro Carvalho Chehab
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[media] rtl2832: implement sleep 



Put demod to soft reset in order to save power when sleep. That drops
power usage ~30mA @5V on USB dongle I tested. In real life it does
not matter much as USB IF powers off demod too, but now it is done
twice - demod and USB IF.

Signed-off-by: default avatarAntti Palosaari <crope@iki.fi>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent 75c24005

drivers/media/dvb-frontends/rtl2832.c

+10 −0
Original line number Diff line number Diff line
@@ -410,13 +410,23 @@ static int rtl2832_sleep(struct dvb_frontend *fe) 
{

	struct rtl2832_dev *dev = fe->demodulator_priv;

	struct i2c_client *client = dev->client;

	int ret;



	dev_dbg(&client->dev, "\n");



	dev->sleeping = true;

	/* stop statistics polling */

	cancel_delayed_work_sync(&dev->stat_work);

	dev->fe_status = 0;



	ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x1);

	if (ret)

		goto err;



	return 0;

err:

	dev_dbg(&client->dev, "failed=%d\n", ret);

	return ret;

}



static int rtl2832_get_tune_settings(struct dvb_frontend *fe,