From 7bf63eda681e095ca3c39d075354053107febf80 Mon Sep 17 00:00:00 2001 From: Devin Heitmueller Date: Wed, 11 Mar 2009 03:00:34 -0300 Subject: V4L/DVB (11063): au8522: power down the digital demod when not in use When the au8522 is idle, put the chip into a low power mode (reduces power consumption from 450ma to 346ma) Thanks to Michael Krufky and Steven Toth for providing sample hardware, engineering level support, and testing. Signed-off-by: Devin Heitmueller Signed-off-by: Michael Krufky Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb/frontends/au8522_dig.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/media/dvb/frontends/au8522_dig.c') diff --git a/drivers/media/dvb/frontends/au8522_dig.c b/drivers/media/dvb/frontends/au8522_dig.c index 17bdbe2c67e6..fa3ecbed1e58 100644 --- a/drivers/media/dvb/frontends/au8522_dig.c +++ b/drivers/media/dvb/frontends/au8522_dig.c @@ -617,6 +617,9 @@ int au8522_sleep(struct dvb_frontend *fe) /* turn off led */ au8522_led_ctrl(state, 0); + /* Power down the chip */ + au8522_writereg(state, 0xa4, 1 << 5); + state->current_frequency = 0; return 0; -- cgit v1.2.3