[PATCH v2 05/10] iio: frequency: ad9910: move channel indexes into a shared header

[Rodrigo Alencar via B4 Relay <devnull+rodrigo.alencar.analog.com@kernel.org>]

From: Rodrigo Alencar <rodrigo.alencar@analog.com>

The channel indexes are used as channel identifiers in IIO backend
operations, such as enabling a parallel data port destination or
selecting a profile. Move them, along with the data destination
definitions, into a shared header, so that the frontend and backend
drivers agree on those identifiers.

No functional change.

Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Rodrigo Alencar <rodrigo.alencar@analog.com>
---
 MAINTAINERS                    |  1 +
 drivers/iio/frequency/ad9910.c | 35 ++-------------------------------
 drivers/iio/frequency/ad9910.h | 44 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 47 insertions(+), 33 deletions(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index 351ec0bca477..64aa7b539ca3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1735,6 +1735,7 @@ F:	Documentation/devicetree/bindings/iio/frequency/adi,ad9910-axi-backend.yaml
 F:	Documentation/devicetree/bindings/iio/frequency/adi,ad9910.yaml
 F:	Documentation/iio/ad9910.rst
 F:	drivers/iio/frequency/ad9910.c
+F:	drivers/iio/frequency/ad9910.h
 
 ANALOG DEVICES INC MAX22007 DRIVER
 M:	Janani Sunil <janani.sunil@analog.com>
diff --git a/drivers/iio/frequency/ad9910.c b/drivers/iio/frequency/ad9910.c
index 8bc24d0b7442..dc13986dff3d 100644
--- a/drivers/iio/frequency/ad9910.c
+++ b/drivers/iio/frequency/ad9910.c
@@ -33,6 +33,8 @@
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
 
+#include "ad9910.h"
+
 /* Register addresses */
 #define AD9910_REG_CFR1			0x00
 #define AD9910_REG_CFR2			0x01
@@ -194,11 +196,6 @@
 #define AD9910_RAM_ENABLED(st)		\
 	FIELD_GET(AD9910_CFR1_RAM_ENABLE_MSK, (st)->reg[AD9910_REG_CFR1].val32)
 
-#define AD9910_DEST_FREQUENCY		0
-#define AD9910_DEST_PHASE		1
-#define AD9910_DEST_AMPLITUDE		2
-#define AD9910_DEST_POLAR		3
-
 /* PLL constants */
 #define AD9910_PLL_MIN_N		12
 #define AD9910_PLL_MAX_N		127
@@ -302,34 +299,6 @@ struct ad9910_ram_fw {
 	__be32 words[] __counted_by_be(wcount);
 } __packed;
 
-enum {
-	AD9910_CHAN_IDX_PHY,
-	AD9910_CHAN_IDX_PROFILE_0,
-	AD9910_CHAN_IDX_PROFILE_1,
-	AD9910_CHAN_IDX_PROFILE_2,
-	AD9910_CHAN_IDX_PROFILE_3,
-	AD9910_CHAN_IDX_PROFILE_4,
-	AD9910_CHAN_IDX_PROFILE_5,
-	AD9910_CHAN_IDX_PROFILE_6,
-	AD9910_CHAN_IDX_PROFILE_7,
-	AD9910_CHAN_IDX_PARALLEL_AMP,
-	AD9910_CHAN_IDX_PARALLEL_PHASE,
-	AD9910_CHAN_IDX_PARALLEL_FREQ,
-	AD9910_CHAN_IDX_PARALLEL_POLAR_AMP,
-	AD9910_CHAN_IDX_PARALLEL_POLAR_PHASE,
-	AD9910_CHAN_IDX_DRG_FREQ,
-	AD9910_CHAN_IDX_DRG_PHASE,
-	AD9910_CHAN_IDX_DRG_AMP,
-	AD9910_CHAN_IDX_DRG_FREQ_RAMP_UP,
-	AD9910_CHAN_IDX_DRG_FREQ_RAMP_DOWN,
-	AD9910_CHAN_IDX_DRG_PHASE_RAMP_UP,
-	AD9910_CHAN_IDX_DRG_PHASE_RAMP_DOWN,
-	AD9910_CHAN_IDX_DRG_AMP_RAMP_UP,
-	AD9910_CHAN_IDX_DRG_AMP_RAMP_DOWN,
-	AD9910_CHAN_IDX_RAM,
-	AD9910_CHAN_IDX_OSK,
-};
-
 enum {
 	AD9910_POWERDOWN,
 	AD9910_DWELL_EN,
diff --git a/drivers/iio/frequency/ad9910.h b/drivers/iio/frequency/ad9910.h
new file mode 100644
index 000000000000..6452a8678ed9
--- /dev/null
+++ b/drivers/iio/frequency/ad9910.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * AD9910 SPI DDS (Direct Digital Synthesizer) driver
+ *
+ * Copyright 2026 Analog Devices Inc.
+ */
+
+#ifndef IIO_FREQUENCY_AD9910_H_
+#define IIO_FREQUENCY_AD9910_H_
+
+#define AD9910_DEST_FREQUENCY		0
+#define AD9910_DEST_PHASE		1
+#define AD9910_DEST_AMPLITUDE		2
+#define AD9910_DEST_POLAR		3
+
+enum ad9910_channel_idx {
+	AD9910_CHAN_IDX_PHY,
+	AD9910_CHAN_IDX_PROFILE_0,
+	AD9910_CHAN_IDX_PROFILE_1,
+	AD9910_CHAN_IDX_PROFILE_2,
+	AD9910_CHAN_IDX_PROFILE_3,
+	AD9910_CHAN_IDX_PROFILE_4,
+	AD9910_CHAN_IDX_PROFILE_5,
+	AD9910_CHAN_IDX_PROFILE_6,
+	AD9910_CHAN_IDX_PROFILE_7,
+	AD9910_CHAN_IDX_PARALLEL_AMP,
+	AD9910_CHAN_IDX_PARALLEL_PHASE,
+	AD9910_CHAN_IDX_PARALLEL_FREQ,
+	AD9910_CHAN_IDX_PARALLEL_POLAR_AMP,
+	AD9910_CHAN_IDX_PARALLEL_POLAR_PHASE,
+	AD9910_CHAN_IDX_DRG_FREQ,
+	AD9910_CHAN_IDX_DRG_PHASE,
+	AD9910_CHAN_IDX_DRG_AMP,
+	AD9910_CHAN_IDX_DRG_FREQ_RAMP_UP,
+	AD9910_CHAN_IDX_DRG_FREQ_RAMP_DOWN,
+	AD9910_CHAN_IDX_DRG_PHASE_RAMP_UP,
+	AD9910_CHAN_IDX_DRG_PHASE_RAMP_DOWN,
+	AD9910_CHAN_IDX_DRG_AMP_RAMP_UP,
+	AD9910_CHAN_IDX_DRG_AMP_RAMP_DOWN,
+	AD9910_CHAN_IDX_RAM,
+	AD9910_CHAN_IDX_OSK,
+};
+
+#endif /* IIO_FREQUENCY_AD9910_H_ */

-- 
2.43.0