[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>
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@ -410,13 +410,23 @@ static int rtl2832_sleep(struct dvb_frontend *fe)
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{
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struct rtl2832_dev *dev = fe->demodulator_priv;
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struct i2c_client *client = dev->client;
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int ret;
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dev_dbg(&client->dev, "\n");
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dev->sleeping = true;
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/* stop statistics polling */
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cancel_delayed_work_sync(&dev->stat_work);
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dev->fe_status = 0;
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ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x1);
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if (ret)
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goto err;
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return 0;
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err:
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dev_dbg(&client->dev, "failed=%d\n", ret);
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return ret;
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}
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static int rtl2832_get_tune_settings(struct dvb_frontend *fe,
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