Commit 44b0be6e authored by Alexandru Tachici's avatar Alexandru Tachici Committed by Jonathan Cameron
Browse files

iio: adc: ad7192: add sequencer support 



Add sequencer support for AD7192.

Signed-off-by: default avatarAlexandru Tachici <alexandru.tachici@analog.com>
Link: https://lore.kernel.org/r/20220322105029.86389-7-alexandru.tachici@analog.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 5cfe8a1c

drivers/iio/adc/ad7192.c

+41 −1
Original line number Diff line number Diff line
@@ -58,7 +58,8 @@ 
/* Mode Register Bit Designations (AD7192_REG_MODE) */

#define AD7192_MODE_SEL(x)	(((x) & 0x7) << 21) /* Operation Mode Select */

#define AD7192_MODE_SEL_MASK	(0x7 << 21) /* Operation Mode Select Mask */

#define AD7192_MODE_DAT_STA	BIT(20) /* Status Register transmission */

#define AD7192_MODE_STA(x)	(((x) & 0x1) << 20) /* Status Register transmission */

#define AD7192_MODE_STA_MASK	BIT(20) /* Status Register transmission Mask */

#define AD7192_MODE_CLKSRC(x)	(((x) & 0x3) << 18) /* Clock Source Select */

#define AD7192_MODE_SINC3	BIT(15) /* SINC3 Filter Select */

#define AD7192_MODE_ACX		BIT(14) /* AC excitation enable(AD7195 only)*/
@@ -288,12 +289,51 @@ static int ad7192_set_mode(struct ad_sigma_delta *sd, 
	return ad_sd_write_reg(&st->sd, AD7192_REG_MODE, 3, st->mode);

}



static int ad7192_append_status(struct ad_sigma_delta *sd, bool append)

{

	struct ad7192_state *st = ad_sigma_delta_to_ad7192(sd);

	unsigned int mode = st->mode;

	int ret;



	mode &= ~AD7192_MODE_STA_MASK;

	mode |= AD7192_MODE_STA(append);



	ret = ad_sd_write_reg(&st->sd, AD7192_REG_MODE, 3, mode);

	if (ret < 0)

		return ret;



	st->mode = mode;



	return 0;

}



static int ad7192_disable_all(struct ad_sigma_delta *sd)

{

	struct ad7192_state *st = ad_sigma_delta_to_ad7192(sd);

	u32 conf = st->conf;

	int ret;



	conf &= ~AD7192_CONF_CHAN_MASK;



	ret = ad_sd_write_reg(&st->sd, AD7192_REG_CONF, 3, conf);

	if (ret < 0)

		return ret;



	st->conf = conf;



	return 0;

}



static const struct ad_sigma_delta_info ad7192_sigma_delta_info = {

	.set_channel = ad7192_set_channel,

	.append_status = ad7192_append_status,

	.disable_all = ad7192_disable_all,

	.set_mode = ad7192_set_mode,

	.has_registers = true,

	.addr_shift = 3,

	.read_mask = BIT(6),

	.status_ch_mask = GENMASK(3, 0),

	.num_slots = 4,

	.irq_flags = IRQF_TRIGGER_FALLING,

};