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>

diff --git a/drivers/iio/adc/ad7192.c b/drivers/iio/adc/ad7192.c
index 4c004af..ba3c82f 100644 (file)
--- a/drivers/iio/adc/ad7192.c
+++ b/drivers/iio/adc/ad7192.c
@@ -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,
 };