linux-kernel - [PATCH v4 4/9] iio: adc: adi-axi-adc: add struct axi_adc

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Message-Id: <20250210-wip-bl-ad7606_add_backend_sw_mode-v4-4-160df18b1da7@baylibre.com>
Date: Mon, 10 Feb 2025 17:10:54 +0100
From: Angelo Dureghello <adureghello@...libre.com>
To: Michael Hennerich <michael.hennerich@...log.com>, 
 Lars-Peter Clausen <lars@...afoo.de>, Jonathan Cameron <jic23@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Alexandru Ardelean <aardelean@...libre.com>, 
 David Lechner <dlechner@...libre.com>
Cc: Jonathan Cameron <Jonathan.Cameron@...wei.com>, 
 linux-fbdev@...r.kernel.org, linux-iio@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Guillaume Stols <gstols@...libre.com>, 
 Angelo Dureghello <adureghello@...libre.com>
Subject: [PATCH v4 4/9] iio: adc: adi-axi-adc: add struct axi_adc_info

From: Angelo Dureghello <adureghello@...libre.com>

Add struct axi_adc_info to allow different axi-adc compatibles that can
be added to this generic implementation.

Signed-off-by: Angelo Dureghello <adureghello@...libre.com>
---
 drivers/iio/adc/adi-axi-adc.c | 30 +++++++++++++++++++++---------
 1 file changed, 21 insertions(+), 9 deletions(-)

diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
index c7357601f0f8..b38e8a27af94 100644
--- a/drivers/iio/adc/adi-axi-adc.c
+++ b/drivers/iio/adc/adi-axi-adc.c
@@ -80,7 +80,16 @@
 	 ADI_AXI_REG_CHAN_CTRL_FMT_EN |		\
 	 ADI_AXI_REG_CHAN_CTRL_ENABLE)
 
+struct axi_adc_info {
+	unsigned int version;
+	const struct iio_backend_info *backend_info;
+	bool has_child_nodes;
+	const void *pdata;
+	unsigned int pdata_sz;
+};
+
 struct adi_axi_adc_state {
+	const struct axi_adc_info *info;
 	struct regmap *regmap;
 	struct device *dev;
 	/* lock to protect multiple accesses to the device registers */
@@ -348,7 +357,6 @@ static const struct iio_backend_info adi_axi_adc_generic = {
 
 static int adi_axi_adc_probe(struct platform_device *pdev)
 {
-	const unsigned int *expected_ver;
 	struct adi_axi_adc_state *st;
 	void __iomem *base;
 	unsigned int ver;
@@ -370,8 +378,8 @@ static int adi_axi_adc_probe(struct platform_device *pdev)
 		return dev_err_probe(&pdev->dev, PTR_ERR(st->regmap),
 				     "failed to init register map\n");
 
-	expected_ver = device_get_match_data(&pdev->dev);
-	if (!expected_ver)
+	st->info = device_get_match_data(&pdev->dev);
+	if (!st->info)
 		return -ENODEV;
 
 	clk = devm_clk_get_enabled(&pdev->dev, NULL);
@@ -391,12 +399,13 @@ static int adi_axi_adc_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	if (ADI_AXI_PCORE_VER_MAJOR(ver) != ADI_AXI_PCORE_VER_MAJOR(*expected_ver)) {
+	if (ADI_AXI_PCORE_VER_MAJOR(ver) !=
+	    ADI_AXI_PCORE_VER_MAJOR(st->info->version)) {
 		dev_err(&pdev->dev,
 			"Major version mismatch. Expected %d.%.2d.%c, Reported %d.%.2d.%c\n",
-			ADI_AXI_PCORE_VER_MAJOR(*expected_ver),
-			ADI_AXI_PCORE_VER_MINOR(*expected_ver),
-			ADI_AXI_PCORE_VER_PATCH(*expected_ver),
+			ADI_AXI_PCORE_VER_MAJOR(st->info->version),
+			ADI_AXI_PCORE_VER_MINOR(st->info->version),
+			ADI_AXI_PCORE_VER_PATCH(st->info->version),
 			ADI_AXI_PCORE_VER_MAJOR(ver),
 			ADI_AXI_PCORE_VER_MINOR(ver),
 			ADI_AXI_PCORE_VER_PATCH(ver));
@@ -416,11 +425,14 @@ static int adi_axi_adc_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static unsigned int adi_axi_adc_10_0_a_info = ADI_AXI_PCORE_VER(10, 0, 'a');
+static const struct axi_adc_info adc_generic = {
+	.version = ADI_AXI_PCORE_VER(10, 0, 'a'),
+	.backend_info = &adi_axi_adc_generic,
+};
 
 /* Match table for of_platform binding */
 static const struct of_device_id adi_axi_adc_of_match[] = {
-	{ .compatible = "adi,axi-adc-10.0.a", .data = &adi_axi_adc_10_0_a_info },
+	{ .compatible = "adi,axi-adc-10.0.a", .data = &adc_generic },
 	{ /* end of list */ }
 };
 MODULE_DEVICE_TABLE(of, adi_axi_adc_of_match);

-- 
2.47.0