linux-kernel - [PATCH v10 22/28] media: platform: Change the call functions of getting/enable/disable the jpeg's clock

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Message-ID: <20200723030451.5616-23-xia.jiang@mediatek.com>
Date:   Thu, 23 Jul 2020 11:04:45 +0800
From:   Xia Jiang <xia.jiang@...iatek.com>
To:     Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Rick Chang <rick.chang@...iatek.com>
CC:     <linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Tomasz Figa <tfiga@...omium.org>,
        <srv_heupstream@...iatek.com>, <senozhatsky@...omium.org>,
        <mojahsu@...omium.org>, <drinkcat@...omium.org>,
        <maoguang.meng@...iatek.com>, Xia Jiang <xia.jiang@...iatek.com>
Subject: [PATCH v10 22/28] media: platform: Change the call functions of getting/enable/disable the jpeg's clock

Use the generic of_property_* helpers to get the clock_nums and clocks
from device tree.
Use the generic clk_bulk_* helpers to enable and disable clocks.

Signed-off-by: Xia Jiang <xia.jiang@...iatek.com>
---
v10: new add patch
---
 .../media/platform/mtk-jpeg/mtk_jpeg_core.c   | 47 +++++++++++++++----
 .../media/platform/mtk-jpeg/mtk_jpeg_core.h   |  8 ++--
 2 files changed, 42 insertions(+), 13 deletions(-)

diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
index 7881e9c93df7..921ed21f7db3 100644
--- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
+++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
@@ -783,14 +783,15 @@ static void mtk_jpeg_clk_on(struct mtk_jpeg_dev *jpeg)
 	ret = mtk_smi_larb_get(jpeg->larb);
 	if (ret)
 		dev_err(jpeg->dev, "mtk_smi_larb_get larbvdec fail %d\n", ret);
-	clk_prepare_enable(jpeg->clk_jdec_smi);
-	clk_prepare_enable(jpeg->clk_jdec);
+
+	ret = clk_bulk_prepare_enable(jpeg->num_clks, jpeg->clks);
+	if (ret)
+		dev_err(jpeg->dev, "Failed to open jpeg clk: %d\n", ret);
 }
 
 static void mtk_jpeg_clk_off(struct mtk_jpeg_dev *jpeg)
 {
-	clk_disable_unprepare(jpeg->clk_jdec);
-	clk_disable_unprepare(jpeg->clk_jdec_smi);
+	clk_bulk_disable_unprepare(jpeg->num_clks, jpeg->clks);
 	mtk_smi_larb_put(jpeg->larb);
 }
 
@@ -939,6 +940,7 @@ static int mtk_jpeg_clk_init(struct mtk_jpeg_dev *jpeg)
 {
 	struct device_node *node;
 	struct platform_device *pdev;
+	int ret, i;
 
 	node = of_parse_phandle(jpeg->dev->of_node, "mediatek,larb", 0);
 	if (!node)
@@ -952,12 +954,39 @@ static int mtk_jpeg_clk_init(struct mtk_jpeg_dev *jpeg)
 
 	jpeg->larb = &pdev->dev;
 
-	jpeg->clk_jdec = devm_clk_get(jpeg->dev, "jpgdec");
-	if (IS_ERR(jpeg->clk_jdec))
-		return PTR_ERR(jpeg->clk_jdec);
+	jpeg->num_clks =
+		of_property_count_strings(jpeg->dev->of_node, "clock-names");
+
+	if (jpeg->num_clks > 0) {
+		jpeg->clks = devm_kcalloc(jpeg->dev, jpeg->num_clks,
+					  sizeof(struct clk_bulk_data),
+					  GFP_KERNEL);
+		if (!jpeg->clks)
+			return -ENOMEM;
+	} else {
+		dev_err(&pdev->dev, "Failed to get jpeg clock count\n");
+		return -EINVAL;
+	}
+
+	for (i = 0; i < jpeg->num_clks; i++) {
+		ret = of_property_read_string_index(jpeg->dev->of_node,
+						    "clock-names", i,
+						    &jpeg->clks->id);
+		if (ret) {
+			dev_err(&pdev->dev,
+				"Failed to get clock name id = %d", i);
+			return ret;
+		}
+	}
 
-	jpeg->clk_jdec_smi = devm_clk_get(jpeg->dev, "jpgdec-smi");
-	return PTR_ERR_OR_ZERO(jpeg->clk_jdec_smi);
+
+	ret = devm_clk_bulk_get(jpeg->dev, jpeg->num_clks, jpeg->clks);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to get jpeg clock:%d\n", ret);
+		return ret;
+	}
+
+	return 0;
 }
 
 static void mtk_jpeg_job_timeout_work(struct work_struct *work)
diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h
index 4c76a9dcc4b7..a54e1e82e655 100644
--- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h
+++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h
@@ -52,8 +52,8 @@ enum mtk_jpeg_ctx_state {
  * @alloc_ctx:		videobuf2 memory allocator's context
  * @dec_vdev:		video device node for decoder mem2mem mode
  * @dec_reg_base:	JPEG registers mapping
- * @clk_jdec:		JPEG hw working clock
- * @clk_jdec_smi:	JPEG SMI bus clock
+ * @clks:		clock names
+ * @num_clks:		numbers of clock
  * @larb:		SMI device
  * @job_timeout_work:	IRQ timeout structure
  */
@@ -67,8 +67,8 @@ struct mtk_jpeg_dev {
 	void			*alloc_ctx;
 	struct video_device	*dec_vdev;
 	void __iomem		*dec_reg_base;
-	struct clk		*clk_jdec;
-	struct clk		*clk_jdec_smi;
+	struct clk_bulk_data *clks;
+	int num_clks;
 	struct device		*larb;
 	struct delayed_work job_timeout_work;
 };
-- 
2.18.0