[2/8] media: s5p-jpeg: Use bulk clk API

Commit Message

Maciej Purski Feb. 19, 2018, 3:44 p.m. UTC

Using bulk clk functions simplifies the driver's code. Use devm_clk_bulk
functions instead of iterating over an array of clks.

Signed-off-by: Maciej Purski <[e-mail]>
---
 drivers/media/platform/s5p-jpeg/jpeg-core.c | 45 ++++++++++++-----------------
 drivers/media/platform/s5p-jpeg/jpeg-core.h |  2 +-
 2 files changed, 20 insertions(+), 27 deletions(-)

Comments

kernel test robot Feb. 20, 2018, 12:22 a.m. UTC | #1

Hi Maciej,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linuxtv-media/master]
[also build test ERROR on v4.16-rc2 next-20180219]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Maciej-Purski/Use-clk-bulk-API-in-exynos5433-drivers/20180220-054431
base:   git://linuxtv.org/media_tree.git master
config: arm-multi_v7_defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm 

All errors (new ones prefixed by >>):

>> ERROR: "devm_clk_bulk_alloc" [drivers/media/platform/s5p-jpeg/s5p-jpeg.ko] undefined!

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

Patch

diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
index 79b63da..681a515 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
@@ -2903,7 +2903,7 @@  static int s5p_jpeg_probe(struct platform_device *pdev)
 {
 	struct s5p_jpeg *jpeg;
 	struct resource *res;
-	int i, ret;
+	int ret;
 
 	/* JPEG IP abstraction struct */
 	jpeg = devm_kzalloc(&pdev->dev, sizeof(struct s5p_jpeg), GFP_KERNEL);
@@ -2938,15 +2938,16 @@  static int s5p_jpeg_probe(struct platform_device *pdev)
 	}
 
 	/* clocks */
-	for (i = 0; i < jpeg->variant->num_clocks; i++) {
-		jpeg->clocks[i] = devm_clk_get(&pdev->dev,
-					      jpeg->variant->clk_names[i]);
-		if (IS_ERR(jpeg->clocks[i])) {
-			dev_err(&pdev->dev, "failed to get clock: %s\n",
-				jpeg->variant->clk_names[i]);
-			return PTR_ERR(jpeg->clocks[i]);
-		}
-	}
+	jpeg->clocks = devm_clk_bulk_alloc(&pdev->dev,
+					   jpeg->variant->num_clocks,
+					   jpeg->variant->clk_names);
+	if (IS_ERR(jpeg->clocks))
+		return PTR_ERR(jpeg->clocks);
+
+	ret = devm_clk_bulk_get(&pdev->dev, jpeg->variant->num_clocks,
+				jpeg->clocks);
+	if (ret < 0)
+		return ret;
 
 	/* v4l2 device */
 	ret = v4l2_device_register(&pdev->dev, &jpeg->v4l2_dev);
@@ -3047,7 +3048,6 @@  static int s5p_jpeg_probe(struct platform_device *pdev)
 static int s5p_jpeg_remove(struct platform_device *pdev)
 {
 	struct s5p_jpeg *jpeg = platform_get_drvdata(pdev);
-	int i;
 
 	pm_runtime_disable(jpeg->dev);
 
@@ -3058,8 +3058,8 @@  static int s5p_jpeg_remove(struct platform_device *pdev)
 	v4l2_device_unregister(&jpeg->v4l2_dev);
 
 	if (!pm_runtime_status_suspended(&pdev->dev)) {
-		for (i = jpeg->variant->num_clocks - 1; i >= 0; i--)
-			clk_disable_unprepare(jpeg->clocks[i]);
+		clk_bulk_disable_unprepare(jpeg->variant->num_clocks,
+					   jpeg->clocks);
 	}
 
 	return 0;
@@ -3069,10 +3069,8 @@  static int s5p_jpeg_remove(struct platform_device *pdev)
 static int s5p_jpeg_runtime_suspend(struct device *dev)
 {
 	struct s5p_jpeg *jpeg = dev_get_drvdata(dev);
-	int i;
 
-	for (i = jpeg->variant->num_clocks - 1; i >= 0; i--)
-		clk_disable_unprepare(jpeg->clocks[i]);
+	clk_bulk_disable_unprepare(jpeg->variant->num_clocks, jpeg->clocks);
 
 	return 0;
 }
@@ -3081,16 +3079,11 @@  static int s5p_jpeg_runtime_resume(struct device *dev)
 {
 	struct s5p_jpeg *jpeg = dev_get_drvdata(dev);
 	unsigned long flags;
-	int i, ret;
-
-	for (i = 0; i < jpeg->variant->num_clocks; i++) {
-		ret = clk_prepare_enable(jpeg->clocks[i]);
-		if (ret) {
-			while (--i >= 0)
-				clk_disable_unprepare(jpeg->clocks[i]);
-			return ret;
-		}
-	}
+	int ret;
+
+	ret = clk_bulk_prepare_enable(jpeg->variant->num_clocks, jpeg->clocks);
+	if (ret)
+		return ret;
 
 	spin_lock_irqsave(&jpeg->slock, flags);
 
diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.h b/drivers/media/platform/s5p-jpeg/jpeg-core.h
index a46465e..dc6ed98 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.h
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.h
@@ -133,7 +133,7 @@  struct s5p_jpeg {
 	void __iomem		*regs;
 	unsigned int		irq;
 	enum exynos4_jpeg_result irq_ret;
-	struct clk		*clocks[JPEG_MAX_CLOCKS];
+	struct clk_bulk_data	*clocks;
 	struct device		*dev;
 	struct s5p_jpeg_variant *variant;
 	u32			irq_status;