From 23da6a15113e97043d37b2ac83d234cd43dc627b Mon Sep 17 00:00:00 2001 From: Giuliano Belinassi Date: Thu, 8 Nov 2018 11:03:20 -0200 Subject: [PATCH] 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 Acked-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron --- drivers/staging/iio/adc/ad7780.c | 15 +++++++++++---- 1 file 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, }, }; -- 2.34.1