linux-kernel - [PATCH v3 06/46] media: sun6i-csi: Define and use variant to get module clock rate

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Message-Id: <20220311143532.265091-7-paul.kocialkowski@bootlin.com>
Date:   Fri, 11 Mar 2022 15:34:52 +0100
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev
Cc:     Yong Deng <yong.deng@...ewell.com>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: [PATCH v3 06/46] media: sun6i-csi: Define and use variant to get module clock rate

Introduce a proper variant structure with the module clock rate
instead of hardcoding it with a manual check on the compatible.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
---
 .../platform/sunxi/sun6i-csi/sun6i_csi.c      | 48 ++++++++++++++-----
 .../platform/sunxi/sun6i-csi/sun6i_csi.h      |  4 ++
 2 files changed, 40 insertions(+), 12 deletions(-)

diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
index 2355088fdc37..4a0d08e0ac25 100644
--- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
+++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
@@ -811,11 +811,17 @@ static int sun6i_csi_resources_setup(struct sun6i_csi_device *csi_dev,
 				     struct platform_device *platform_dev)
 {
 	struct device *dev = csi_dev->dev;
-	unsigned long clk_mod_rate;
+	const struct sun6i_csi_variant *variant;
 	void __iomem *io_base;
 	int ret;
 	int irq;
 
+	/* Variant */
+
+	variant = of_device_get_match_data(dev);
+	if (!variant)
+		return -EINVAL;
+
 	/* Registers */
 
 	io_base = devm_platform_ioremap_resource(platform_dev, 0);
@@ -849,12 +855,7 @@ static int sun6i_csi_resources_setup(struct sun6i_csi_device *csi_dev,
 		return PTR_ERR(csi_dev->clk_ram);
 	}
 
-	if (of_device_is_compatible(dev->of_node, "allwinner,sun50i-a64-csi"))
-		clk_mod_rate = 300000000;
-	else
-		clk_mod_rate = 297000000;
-
-	ret = clk_set_rate_exclusive(csi_dev->clk_mod, clk_mod_rate);
+	ret = clk_set_rate_exclusive(csi_dev->clk_mod, variant->clk_mod_rate);
 	if (ret) {
 		dev_err(dev, "failed to set mod clock rate\n");
 		return ret;
@@ -937,12 +938,35 @@ static int sun6i_csi_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct sun6i_csi_variant sun6i_a31_csi_variant = {
+	.clk_mod_rate	= 297000000,
+};
+
+static const struct sun6i_csi_variant sun50i_a64_csi_variant = {
+	.clk_mod_rate	= 300000000,
+};
+
 static const struct of_device_id sun6i_csi_of_match[] = {
-	{ .compatible = "allwinner,sun6i-a31-csi", },
-	{ .compatible = "allwinner,sun8i-a83t-csi", },
-	{ .compatible = "allwinner,sun8i-h3-csi", },
-	{ .compatible = "allwinner,sun8i-v3s-csi", },
-	{ .compatible = "allwinner,sun50i-a64-csi", },
+	{
+		.compatible	= "allwinner,sun6i-a31-csi",
+		.data		= &sun6i_a31_csi_variant,
+	},
+	{
+		.compatible	= "allwinner,sun8i-a83t-csi",
+		.data		= &sun6i_a31_csi_variant,
+	},
+	{
+		.compatible	= "allwinner,sun8i-h3-csi",
+		.data		= &sun6i_a31_csi_variant,
+	},
+	{
+		.compatible	= "allwinner,sun8i-v3s-csi",
+		.data		= &sun6i_a31_csi_variant,
+	},
+	{
+		.compatible	= "allwinner,sun50i-a64-csi",
+		.data		= &sun50i_a64_csi_variant,
+	},
 	{},
 };
 
diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h
index 356661b413f8..3c4a3af6b897 100644
--- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h
+++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h
@@ -59,6 +59,10 @@ struct sun6i_csi_device {
 	int				planar_offset[3];
 };
 
+struct sun6i_csi_variant {
+	unsigned long	clk_mod_rate;
+};
+
 /**
  * sun6i_csi_is_format_supported() - check if the format supported by csi
  * @csi:	pointer to the csi
-- 
2.35.1