linux-kernel - [PATCH v7 11/13] clk: mediatek: mt8183: switch mmsys to platform device probing

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Date:   Thu, 13 Feb 2020 21:19:51 +0100
From:   matthias.bgg@...nel.org
To:     robh+dt@...nel.org, mark.rutland@....com, ck.hu@...iatek.com,
        p.zabel@...gutronix.de, airlied@...ux.ie, mturquette@...libre.com,
        sboyd@...nel.org, ulrich.hecht+renesas@...il.com,
        laurent.pinchart@...asonboard.com, enric.balletbo@...labora.com
Cc:     devicetree@...r.kernel.org, drinkcat@...omium.org,
        frank-w@...lic-files.de, sean.wang@...iatek.com,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        wens@...e.org, linux-mediatek@...ts.infradead.org,
        rdunlap@...radead.org, matthias.bgg@...nel.org,
        hsinyi@...omium.org, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
        Matthias Brugger <mbrugger@...e.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Weiyi Lu <weiyi.lu@...iatek.com>
Subject: [PATCH v7 11/13] clk: mediatek: mt8183: switch mmsys to platform device probing

From: Matthias Brugger <mbrugger@...e.com>

Switch probing for the MMSYS to support invocation to a
plain paltform device. The driver will be probed by the DRM subsystem.

Signed-off-by: Matthias Brugger <mbrugger@...e.com>

---

Changes in v7:
- free clk_data->clks as well
- get rid of private data structure

Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None

 drivers/clk/mediatek/clk-mt8183-mm.c | 30 ++++++++++++++++++----------
 1 file changed, 20 insertions(+), 10 deletions(-)

diff --git a/drivers/clk/mediatek/clk-mt8183-mm.c b/drivers/clk/mediatek/clk-mt8183-mm.c
index 720c696b506d..7576cd231be3 100644
--- a/drivers/clk/mediatek/clk-mt8183-mm.c
+++ b/drivers/clk/mediatek/clk-mt8183-mm.c
@@ -3,8 +3,10 @@
 // Copyright (c) 2018 MediaTek Inc.
 // Author: Weiyi Lu <weiyi.lu@...iatek.com>
 
+#include <linux/module.h>
 #include <linux/clk-provider.h>
 #include <linux/platform_device.h>
+#include <linux/slab.h>
 
 #include "clk-mtk.h"
 #include "clk-gate.h"
@@ -85,27 +87,35 @@ static const struct mtk_gate mm_clks[] = {
 static int clk_mt8183_mm_probe(struct platform_device *pdev)
 {
 	struct clk_onecell_data *clk_data;
-	struct device_node *node = pdev->dev.of_node;
+	struct device_node *node = pdev->dev.parent->of_node;
+
+	clk_data = devm_kzalloc(&pdev->dev, sizeof(*clk_data), GFP_KERNEL);
+	if (!clk_data)
+		return -ENOMEM;
 
 	clk_data = mtk_alloc_clk_data(CLK_MM_NR_CLK);
+	platform_set_drvdata(pdev, clk_data);
 
-	mtk_clk_register_gates(node, mm_clks, ARRAY_SIZE(mm_clks),
-			clk_data);
+	mtk_clk_register_gates(node, mm_clks, ARRAY_SIZE(mm_clks), clk_data);
 
 	return of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
 }
 
-static const struct of_device_id of_match_clk_mt8183_mm[] = {
-	{ .compatible = "mediatek,mt8183-mmsys", },
-	{}
-};
+static int clk_mt8183_mm_remove(struct platform_device *pdev)
+{
+	struct clk_onecell_data *clk_data = platform_get_drvdata(pdev);
+
+	kfree(clk_data->clks);
+	kfree(clk_data);
+
+	return 0;
+}
 
 static struct platform_driver clk_mt8183_mm_drv = {
 	.probe = clk_mt8183_mm_probe,
+	.remove = clk_mt8183_mm_remove,
 	.driver = {
 		.name = "clk-mt8183-mm",
-		.of_match_table = of_match_clk_mt8183_mm,
 	},
 };
-
-builtin_platform_driver(clk_mt8183_mm_drv);
+module_platform_driver(clk_mt8183_mm_drv);
-- 
2.24.1