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| author | Antti Palosaari <crope@iki.fi> | 2014-12-16 14:51:33 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-02-03 16:20:02 -0200 |
| commit | a08c3781194142cce39bbb739373efc8dacaa1fa (patch) | |
| tree | 2ede8612d68c74df6982ba94bb25e0a4cf42a7a4 /drivers/media | |
| parent | 75c24005eeec0613c319a577c613182ead017cff (diff) | |
| download | linux-a08c3781194142cce39bbb739373efc8dacaa1fa.tar.gz linux-a08c3781194142cce39bbb739373efc8dacaa1fa.tar.bz2 linux-a08c3781194142cce39bbb739373efc8dacaa1fa.zip | |
[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: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/dvb-frontends/rtl2832.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/rtl2832.c b/drivers/media/dvb-frontends/rtl2832.c index e5f7d7925c85..e80c6b974f4c 100644 --- a/drivers/media/dvb-frontends/rtl2832.c +++ b/drivers/media/dvb-frontends/rtl2832.c @@ -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, |