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Commit 23da6a15 authored by Giuliano Belinassi's avatar Giuliano Belinassi Committed by Jonathan Cameron
Browse files

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: default avatarGiuliano Belinassi <giuliano.belinassi@usp.br>
Acked-by: default avatarAlexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 72e3a524

drivers/staging/iio/adc/ad7780.c

+11 −4
Original line number Diff line number Diff line
@@ -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 (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,

	},

};