linux-kernel - [PATCH 5/5] iio: adc: ad7192: add sequencer support

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Date:   Wed, 10 Nov 2021 13:17:50 +0200
From:   <alexandru.tachici@...log.com>
To:     <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <jic23@...nel.org>,
        Alexandru Tachici <alexandru.tachici@...log.com>
Subject: [PATCH 5/5] iio: adc: ad7192: add sequencer support

From: Alexandru Tachici <alexandru.tachici@...log.com>

Add sequencer support for AD7192.

Signed-off-by: Alexandru Tachici <alexandru.tachici@...log.com>
---
 drivers/iio/adc/ad7192.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/ad7192.c b/drivers/iio/adc/ad7192.c
index 1fc0f4eb858e..e70f86d9a219 100644
--- 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)*/
@@ -287,12 +288,25 @@ 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);
+
+	st->mode &= ~AD7192_MODE_STA_MASK;
+	st->mode |= AD7192_MODE_STA(append);
+
+	return ad_sd_write_reg(&st->sd, AD7192_REG_MODE, 3, st->mode);
+}
+
 static const struct ad_sigma_delta_info ad7192_sigma_delta_info = {
 	.set_channel = ad7192_set_channel,
+	.append_status = ad7192_append_status,
 	.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,
 };
 
-- 
2.25.1