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Commit 89ca79af authored by Peter Meerwald's avatar Peter Meerwald Committed by Jonathan Cameron
Browse files

iio:adc:ad799x: Add helper function to read/write config register 



16-bit on ad7997/ad7998, 8-bit elsewhere

Signed-off-by: default avatarPeter Meerwald <pmeerw@pmeerw.net>
Acked-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent ef0bf6f8

drivers/iio/adc/ad799x.c

+24 −0
Original line number Diff line number Diff line
@@ -136,6 +136,30 @@ struct ad799x_state { 
	unsigned int			transfer_size;

};



static int ad799x_write_config(struct ad799x_state *st, u16 val)

{

	switch (st->id) {

	case ad7997:

	case ad7998:

		return i2c_smbus_write_word_swapped(st->client, AD7998_CONF_REG,

			val);

	default:

		return i2c_smbus_write_byte_data(st->client, AD7998_CONF_REG,

			val);

	}

}



static int ad799x_read_config(struct ad799x_state *st)

{

	switch (st->id) {

	case ad7997:

	case ad7998:

		return i2c_smbus_read_word_swapped(st->client, AD7998_CONF_REG);

	default:

		return i2c_smbus_read_byte_data(st->client, AD7998_CONF_REG);

	}

}



/**

 * ad799x_trigger_handler() bh of trigger launched polling to ring buffer

 *