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iio: adc: ad7192: add sequencer support 

Add sequencer support for AD7192.

Signed-off-by: Alexandru Tachici <alexandru.tachici@analog.com>
Link: https://lore.kernel.org/r/20220322105029.86389-7-alexandru.tachici@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Alexandru Tachici 2022-03-22 12:50:29 +02:00 committed by Jonathan Cameron
parent 5cfe8a1c25
commit 44b0be6eb3
1 changed files with 41 additions and 1 deletions
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42
drivers/iio/adc/ad7192.c
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@ -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,
};