linux-kernel - [PATCH v4, 02/10] soc: mediatek: mmsys: Create struct mtk

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Message-ID: <1609815993-22744-3-git-send-email-yongqiang.niu@mediatek.com>
Date:   Tue, 5 Jan 2021 11:06:25 +0800
From:   Yongqiang Niu <yongqiang.niu@...iatek.com>
To:     CK Hu <ck.hu@...iatek.com>, Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Mark Rutland <mark.rutland@....com>,
        <dri-devel@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        Yongqiang Niu <yongqiang.niu@...iatek.com>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>
Subject: [PATCH v4, 02/10] soc: mediatek: mmsys: Create struct mtk_mmsys to store context data

Apart from the driver data, in order to extend the driver to support more
and more SoCs, we will need to store other configuration data. So, create
a mtk_mmsys struct to encapsulate all that information.

Signed-off-by: CK Hu <ck.hu@...iatek.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
Signed-off-by: Yongqiang Niu <yongqiang.niu@...iatek.com>
Reviewed-by: Chun-Kuang Hu <chunkuang.hu@...nel.org>
---
 drivers/soc/mediatek/mmsys/mtk-mmsys.c | 47 +++++++++++++++++++---------------
 1 file changed, 27 insertions(+), 20 deletions(-)

diff --git a/drivers/soc/mediatek/mmsys/mtk-mmsys.c b/drivers/soc/mediatek/mmsys/mtk-mmsys.c
index 18f9397..6c03282 100644
--- a/drivers/soc/mediatek/mmsys/mtk-mmsys.c
+++ b/drivers/soc/mediatek/mmsys/mtk-mmsys.c
@@ -77,6 +77,11 @@ struct mtk_mmsys_driver_data {
 	const char *clk_driver;
 };
 
+struct mtk_mmsys {
+	void __iomem *regs;
+	const struct mtk_mmsys_driver_data *data;
+};
+
 static const struct mtk_mmsys_driver_data mt2701_mmsys_driver_data = {
 	.clk_driver = "clk-mt2701-mm",
 };
@@ -259,21 +264,21 @@ void mtk_mmsys_ddp_connect(struct device *dev,
 			   enum mtk_ddp_comp_id cur,
 			   enum mtk_ddp_comp_id next)
 {
-	void __iomem *config_regs = dev_get_drvdata(dev);
+	struct mtk_mmsys *mmsys = dev_get_drvdata(dev);
 	unsigned int addr, value, reg;
 
 	value = mtk_mmsys_ddp_mout_en(cur, next, &addr);
 	if (value) {
-		reg = readl_relaxed(config_regs + addr) | value;
-		writel_relaxed(reg, config_regs + addr);
+		reg = readl_relaxed(mmsys->regs + addr) | value;
+		writel_relaxed(reg, mmsys->regs + addr);
 	}
 
-	mtk_mmsys_ddp_sout_sel(config_regs, cur, next);
+	mtk_mmsys_ddp_sout_sel(mmsys->regs, cur, next);
 
 	value = mtk_mmsys_ddp_sel_in(cur, next, &addr);
 	if (value) {
-		reg = readl_relaxed(config_regs + addr) | value;
-		writel_relaxed(reg, config_regs + addr);
+		reg = readl_relaxed(mmsys->regs + addr) | value;
+		writel_relaxed(reg, mmsys->regs + addr);
 	}
 }
 EXPORT_SYMBOL_GPL(mtk_mmsys_ddp_connect);
@@ -282,44 +287,46 @@ void mtk_mmsys_ddp_disconnect(struct device *dev,
 			      enum mtk_ddp_comp_id cur,
 			      enum mtk_ddp_comp_id next)
 {
-	void __iomem *config_regs = dev_get_drvdata(dev);
+	struct mtk_mmsys *mmsys = dev_get_drvdata(dev);
 	unsigned int addr, value, reg;
 
 	value = mtk_mmsys_ddp_mout_en(cur, next, &addr);
 	if (value) {
-		reg = readl_relaxed(config_regs + addr) & ~value;
-		writel_relaxed(reg, config_regs + addr);
+		reg = readl_relaxed(mmsys->regs + addr) & ~value;
+		writel_relaxed(reg, mmsys->regs + addr);
 	}
 
 	value = mtk_mmsys_ddp_sel_in(cur, next, &addr);
 	if (value) {
-		reg = readl_relaxed(config_regs + addr) & ~value;
-		writel_relaxed(reg, config_regs + addr);
+		reg = readl_relaxed(mmsys->regs + addr) & ~value;
+		writel_relaxed(reg, mmsys->regs + addr);
 	}
 }
 EXPORT_SYMBOL_GPL(mtk_mmsys_ddp_disconnect);
 
 static int mtk_mmsys_probe(struct platform_device *pdev)
 {
-	const struct mtk_mmsys_driver_data *data;
 	struct device *dev = &pdev->dev;
 	struct platform_device *clks;
 	struct platform_device *drm;
-	void __iomem *config_regs;
+	struct mtk_mmsys *mmsys;
 	int ret;
 
-	config_regs = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(config_regs)) {
-		ret = PTR_ERR(config_regs);
+	mmsys = devm_kzalloc(dev, sizeof(*mmsys), GFP_KERNEL);
+	if (!mmsys)
+		return -ENOMEM;
+
+	mmsys->regs = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(mmsys->regs)) {
+		ret = PTR_ERR(mmsys->regs);
 		dev_err(dev, "Failed to ioremap mmsys registers: %d\n", ret);
 		return ret;
 	}
 
-	platform_set_drvdata(pdev, config_regs);
-
-	data = of_device_get_match_data(&pdev->dev);
+	mmsys->data = of_device_get_match_data(&pdev->dev);
+	platform_set_drvdata(pdev, mmsys);
 
-	clks = platform_device_register_data(&pdev->dev, data->clk_driver,
+	clks = platform_device_register_data(&pdev->dev, mmsys->data->clk_driver,
 					     PLATFORM_DEVID_AUTO, NULL, 0);
 	if (IS_ERR(clks))
 		return PTR_ERR(clks);
-- 
1.8.1.1.dirty