diff options
| author | Giuliano Belinassi <giuliano.belinassi@gmail.com> | 2018-11-08 11:03:20 -0200 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2018-11-16 18:32:17 +0000 |
| commit | 23da6a15113e97043d37b2ac83d234cd43dc627b (patch) | |
| tree | 9116385d7f3a94636f1b45987f86c2ed734db8ed /drivers/staging/iio | |
| parent | 72e3a5248da9046d17aec9366976a3ec45ceeb3c (diff) | |
| download | linux-23da6a15113e97043d37b2ac83d234cd43dc627b.tar.bz2 | |
staging: iio: ad7780: check if ad778x before gain update
Only the ad778x have the 'gain' status bit. Check it before updating
through a new variable is_ad778x in chip_info.
Signed-off-by: Giuliano Belinassi <giuliano.belinassi@usp.br>
Acked-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/staging/iio')
| -rw-r--r-- | drivers/staging/iio/adc/ad7780.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c index 91e016d534ed..9ec2b002539e 100644 --- a/drivers/staging/iio/adc/ad7780.c +++ b/drivers/staging/iio/adc/ad7780.c @@ -35,6 +35,7 @@ struct ad7780_chip_info { struct iio_chan_spec channel; unsigned int pattern_mask; unsigned int pattern; + bool is_ad778x; }; struct ad7780_state { @@ -113,10 +114,12 @@ static int ad7780_postprocess_sample(struct ad_sigma_delta *sigma_delta, ((raw_sample & chip_info->pattern_mask) != chip_info->pattern)) return -EIO; - if (raw_sample & AD7780_GAIN) - st->gain = 1; - else - st->gain = 128; + if (chip_info->is_ad778x) { + if (raw_sample & AD7780_GAIN) + st->gain = 1; + else + st->gain = 128; + } return 0; } @@ -135,21 +138,25 @@ static const struct ad7780_chip_info ad7780_chip_info_tbl[] = { .channel = AD7780_CHANNEL(12, 24), .pattern = 0x5, .pattern_mask = 0x7, + .is_ad778x = false, }, [ID_AD7171] = { .channel = AD7780_CHANNEL(16, 24), .pattern = 0x5, .pattern_mask = 0x7, + .is_ad778x = false, }, [ID_AD7780] = { .channel = AD7780_CHANNEL(24, 32), .pattern = 0x1, .pattern_mask = 0x3, + .is_ad778x = true, }, [ID_AD7781] = { .channel = AD7780_CHANNEL(20, 32), .pattern = 0x1, .pattern_mask = 0x3, + .is_ad778x = true, }, }; |