linux-kernel - [PATCH] iio: adc: ad7124: drop use of chip info array

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Message-Id: <20250628-iio-const-data-5-v1-1-9e56c2f77979@baylibre.com>
Date: Sat, 28 Jun 2025 11:16:51 -0500
From: David Lechner <dlechner@...libre.com>
To: Lars-Peter Clausen <lars@...afoo.de>, 
 Michael Hennerich <Michael.Hennerich@...log.com>, 
 Jonathan Cameron <jic23@...nel.org>, 
 Nuno Sá <nuno.sa@...log.com>, 
 Andy Shevchenko <andy@...nel.org>
Cc: linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 David Lechner <dlechner@...libre.com>
Subject: [PATCH] iio: adc: ad7124: drop use of chip info array

Change the ad7124 driver to use individual chip info structures instead
of an array. This reduces the verbosity of the code. Also, the data is
now const as it should have been in the first place.

Signed-off-by: David Lechner <dlechner@...libre.com>
---
 drivers/iio/adc/ad7124.c | 36 ++++++++++++++----------------------
 1 file changed, 14 insertions(+), 22 deletions(-)

diff --git a/drivers/iio/adc/ad7124.c b/drivers/iio/adc/ad7124.c
index 92596f15e797378329d2072bff71e392664c69db..9808df2e92424283a86e9c105492c7447d071e44 100644
--- a/drivers/iio/adc/ad7124.c
+++ b/drivers/iio/adc/ad7124.c
@@ -94,11 +94,6 @@
 
 /* AD7124 input sources */
 
-enum ad7124_ids {
-	ID_AD7124_4,
-	ID_AD7124_8,
-};
-
 enum ad7124_ref_sel {
 	AD7124_REFIN1,
 	AD7124_REFIN2,
@@ -193,17 +188,16 @@ struct ad7124_state {
 	DECLARE_KFIFO(live_cfgs_fifo, struct ad7124_channel_config *, AD7124_MAX_CONFIGS);
 };
 
-static struct ad7124_chip_info ad7124_chip_info_tbl[] = {
-	[ID_AD7124_4] = {
-		.name = "ad7124-4",
-		.chip_id = AD7124_ID_DEVICE_ID_AD7124_4,
-		.num_inputs = 8,
-	},
-	[ID_AD7124_8] = {
-		.name = "ad7124-8",
-		.chip_id = AD7124_ID_DEVICE_ID_AD7124_8,
-		.num_inputs = 16,
-	},
+static const struct ad7124_chip_info ad7124_4_chip_info = {
+	.name = "ad7124-4",
+	.chip_id = AD7124_ID_DEVICE_ID_AD7124_4,
+	.num_inputs = 8,
+};
+
+static const struct ad7124_chip_info ad7124_8_chip_info = {
+	.name = "ad7124-8",
+	.chip_id = AD7124_ID_DEVICE_ID_AD7124_8,
+	.num_inputs = 16,
 };
 
 static int ad7124_find_closest_match(const int *array,
@@ -1341,17 +1335,15 @@ static int ad7124_probe(struct spi_device *spi)
 }
 
 static const struct of_device_id ad7124_of_match[] = {
-	{ .compatible = "adi,ad7124-4",
-		.data = &ad7124_chip_info_tbl[ID_AD7124_4], },
-	{ .compatible = "adi,ad7124-8",
-		.data = &ad7124_chip_info_tbl[ID_AD7124_8], },
+	{ .compatible = "adi,ad7124-4", .data = &ad7124_4_chip_info },
+	{ .compatible = "adi,ad7124-8", .data = &ad7124_8_chip_info },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, ad7124_of_match);
 
 static const struct spi_device_id ad71124_ids[] = {
-	{ "ad7124-4", (kernel_ulong_t)&ad7124_chip_info_tbl[ID_AD7124_4] },
-	{ "ad7124-8", (kernel_ulong_t)&ad7124_chip_info_tbl[ID_AD7124_8] },
+	{ "ad7124-4", (kernel_ulong_t)&ad7124_4_chip_info },
+	{ "ad7124-8", (kernel_ulong_t)&ad7124_8_chip_info },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, ad71124_ids);

---
base-commit: 14071b9cf2d751ff9bc8b5e43fa94fbf08aceea1
change-id: 20250628-iio-const-data-5-4cc817647407

Best regards,
-- 
David Lechner <dlechner@...libre.com>