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V4L/DVB (11063): au8522: power down the digital demod when not in use

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When the au8522 is idle, put the chip into a low power mode (reduces power
consumption from 450ma to 346ma)

Thanks to Michael Krufky <mkrufky@linuxtv.org> and Steven Toth
<stoth@linuxtv.org> for providing sample hardware, engineering level support,
and testing.

Signed-off-by: Devin Heitmueller <dheitmueller@linuxtv.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Devin Heitmueller 2009-03-11 03:00:34 -03:00 committed by Mauro Carvalho Chehab
parent 083a17317b
commit 7bf63eda68
1 changed files with 3 additions and 0 deletions
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3
drivers/media/dvb/frontends/au8522_dig.c
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@ -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;