linux-kernel - [PATCH v4--to=ulrich.hecht+renesas@...il.com 2/5] clk: mediatek: mt2701-mmsys: switch to platform device probing

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Date:   Tue, 17 Jul 2018 23:59:48 +0200
From:   matthias.bgg@...nel.org
To:     laurent.pinchart@...asonboard.com, ck.hu@...iatek.com,
        p.zabel@...gutronix.de, airlied@...ux.ie, robh+dt@...nel.org,
        mark.rutland@....com, mturquette@...libre.com,
        sboyd@...eaurora.org, lee.jones@...aro.org
Cc:     davem@...emloft.net, gregkh@...uxfoundation.org,
        mchehab@...nel.org, rdunlap@...radead.org,
        pi-cheng.chen@...aro.org, sean.wang@...iatek.com,
        linux-clk@...r.kernel.org, linux@...linux.org.uk,
        matthias.bgg@...il.com, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Matthias Brugger <mbrugger@...e.com>
Subject: [PATCH v4--to=ulrich.hecht+renesas@...il.com 2/5] clk: mediatek: mt2701-mmsys: switch 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>
---
 drivers/clk/mediatek/clk-mt2701-mm.c | 42 ++++++++++++++++++++--------
 1 file changed, 30 insertions(+), 12 deletions(-)

diff --git a/drivers/clk/mediatek/clk-mt2701-mm.c b/drivers/clk/mediatek/clk-mt2701-mm.c
index fe1f85072fc5..200b1842b94b 100644
--- a/drivers/clk/mediatek/clk-mt2701-mm.c
+++ b/drivers/clk/mediatek/clk-mt2701-mm.c
@@ -12,14 +12,20 @@
  * GNU General Public License for more details.
  */
 
+#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"
 
 #include <dt-bindings/clock/mt2701-clk.h>
 
+struct clk_mt2701_mm_priv {
+	struct clk_onecell_data *clk_data;
+};
+
 static const struct mtk_gate_regs disp0_cg_regs = {
 	.set_ofs = 0x0104,
 	.clr_ofs = 0x0108,
@@ -87,23 +93,25 @@ static const struct mtk_gate mm_clks[] = {
 	GATE_DISP1(CLK_MM_TVE_FMM, "mm_tve_fmm", "mm_sel", 14),
 };
 
-static const struct of_device_id of_match_clk_mt2701_mm[] = {
-	{ .compatible = "mediatek,mt2701-mmsys", },
-	{}
-};
-
 static int clk_mt2701_mm_probe(struct platform_device *pdev)
 {
-	struct clk_onecell_data *clk_data;
 	int r;
-	struct device_node *node = pdev->dev.of_node;
+	struct device_node *node = pdev->dev.parent->of_node;
+	struct clk_mt2701_mm_priv *private;
+
+	private = devm_kzalloc(&pdev->dev, sizeof(*private), GFP_KERNEL);
+	if (!private)
+		return -ENOMEM;
 
-	clk_data = mtk_alloc_clk_data(CLK_MM_NR);
+	private->clk_data = mtk_alloc_clk_data(CLK_MM_NR);
+
+	platform_set_drvdata(pdev, private);
 
 	mtk_clk_register_gates(node, mm_clks, ARRAY_SIZE(mm_clks),
-						clk_data);
+					private->clk_data);
 
-	r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
+	r = of_clk_add_provider(node, of_clk_src_onecell_get,
+					private->clk_data);
 	if (r)
 		dev_err(&pdev->dev,
 			"could not register clock provider: %s: %d\n",
@@ -112,12 +120,22 @@ static int clk_mt2701_mm_probe(struct platform_device *pdev)
 	return r;
 }
 
+static int clk_mt2701_mm_remove(struct platform_device *pdev)
+{
+	struct clk_mt2701_mm_priv *private = platform_get_drvdata(pdev);
+
+	kfree(private->clk_data);
+	kfree(private);
+
+	return 0;
+}
+
 static struct platform_driver clk_mt2701_mm_drv = {
 	.probe = clk_mt2701_mm_probe,
+	.remove = clk_mt2701_mm_remove,
 	.driver = {
 		.name = "clk-mt2701-mm",
-		.of_match_table = of_match_clk_mt2701_mm,
 	},
 };
 
-builtin_platform_driver(clk_mt2701_mm_drv);
+module_platform_driver(clk_mt2701_mm_drv);
-- 
2.17.1