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Commit 2eacc608 authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Jonathan Cameron
Browse files

iio: ad799x: Fix ad7991/ad7995/ad7999 config setup 



The ad7991/ad7995/ad7999 does not have a configuration register like the
other devices that can be written and read. The configuration is written as
part of the conversion sequence.

Fixes: 0f7ddcc1 ("iio:adc:ad799x: Write default config on probe and reset alert status on probe")
Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Tested-by: default avatarMike Looijmans <mike.looijmans@topic.nl>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 9e8e228f

drivers/iio/adc/ad799x.c

+13 −2
Original line number Diff line number Diff line
@@ -143,9 +143,15 @@ static int ad799x_write_config(struct ad799x_state *st, u16 val) 
	case ad7998:

		return i2c_smbus_write_word_swapped(st->client, AD7998_CONF_REG,

			val);

	default:

	case ad7992:

	case ad7993:

	case ad7994:

		return i2c_smbus_write_byte_data(st->client, AD7998_CONF_REG,

			val);

	default:

		/* Will be written when doing a conversion */

		st->config = val;

		return 0;

	}

}
@@ -155,8 +161,13 @@ static int ad799x_read_config(struct ad799x_state *st) 
	case ad7997:

	case ad7998:

		return i2c_smbus_read_word_swapped(st->client, AD7998_CONF_REG);

	default:

	case ad7992:

	case ad7993:

	case ad7994:

		return i2c_smbus_read_byte_data(st->client, AD7998_CONF_REG);

	default:

		/* No readback support */

		return st->config;

	}

}