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media: radio: Tuning bugfix for si470x over i2c

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Fixed si470x_set_channel() trying to tune before chip is turned
on, which causes warnings in dmesg and when probing, makes driver
wait for 3s for tuning timeout. This issue did not affect USB
devices because they have a different probing sequence.

Signed-off-by: Douglas Fischer <fischerdouglasc@gmail.com>
[hans.verkuil@cisco.com: fixed space-after-( checkpatch warning]
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Douglas Fischer 2018-02-25 21:24:06 -05:00 committed by Mauro Carvalho Chehab
parent 3e187c81d4
commit 36d6bf8976
1 changed files with 9 additions and 0 deletions
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9
drivers/media/radio/si470x/radio-si470x-common.c
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@ -207,6 +207,15 @@ static int si470x_set_chan(struct si470x_device *radio, unsigned short chan)
unsigned long time_left;
bool timed_out = false;
retval = si470x_get_register(radio, POWERCFG);
if (retval)
return retval;
if ((radio->registers[POWERCFG] & (POWERCFG_ENABLE|POWERCFG_DMUTE))
!= (POWERCFG_ENABLE|POWERCFG_DMUTE)) {
return 0;
}
/* start tuning */
radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
radio->registers[CHANNEL] |= CHANNEL_TUNE | chan;