sh: sh_mobile ceu clock framework support

[safe/jmp/linux-2.6] / drivers / media / video / sh_mobile_ceu_camera.c

diff --git a/drivers/media/video/sh_mobile_ceu_camera.c b/drivers/media/video/sh_mobile_ceu_camera.c
index 2407607..536b1a9 100644 (file)
--- a/drivers/media/video/sh_mobile_ceu_camera.c
+++ b/drivers/media/video/sh_mobile_ceu_camera.c
@@ -31,6 +31,7 @@
 #include <linux/platform_device.h>
 #include <linux/mutex.h>
 #include <linux/videodev2.h>
+#include <linux/clk.h>
 
 #include <media/v4l2-common.h>
 #include <media/v4l2-dev.h>
@@ -89,6 +90,7 @@ struct sh_mobile_ceu_dev {
 
        unsigned int irq;
        void __iomem *base;
+       struct clk *clk;
        unsigned long video_limit;
 
        /* lock used to protect videobuf */
@@ -309,6 +311,8 @@ static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
        if (ret)
                goto err;
 
+       clk_enable(pcdev->clk);
+
        ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
        while (ceu_read(pcdev, CSTSR) & 1)
                msleep(1);
@@ -342,6 +346,8 @@ static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
        }
        spin_unlock_irqrestore(&pcdev->lock, flags);
 
+       clk_disable(pcdev->clk);
+
        icd->ops->release(icd);
 
        dev_info(&icd->dev,
@@ -550,6 +556,7 @@ static int sh_mobile_ceu_probe(struct platform_device *pdev)
        struct sh_mobile_ceu_dev *pcdev;
        struct resource *res;
        void __iomem *base;
+       char clk_name[8];
        unsigned int irq;
        int err = 0;
 
@@ -615,6 +622,14 @@ static int sh_mobile_ceu_probe(struct platform_device *pdev)
                goto exit_release_mem;
        }
 
+       snprintf(clk_name, sizeof(clk_name), "ceu%d", pdev->id);
+       pcdev->clk = clk_get(&pdev->dev, clk_name);
+       if (IS_ERR(pcdev->clk)) {
+               dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
+               err = PTR_ERR(pcdev->clk);
+               goto exit_free_irq;
+       }
+
        pcdev->ici.priv = pcdev;
        pcdev->ici.dev.parent = &pdev->dev;
        pcdev->ici.nr = pdev->id;
@@ -623,10 +638,12 @@ static int sh_mobile_ceu_probe(struct platform_device *pdev)
 
        err = soc_camera_host_register(&pcdev->ici);
        if (err)
-               goto exit_free_irq;
+               goto exit_free_clk;
 
        return 0;
 
+exit_free_clk:
+       clk_put(pcdev->clk);
 exit_free_irq:
        free_irq(pcdev->irq, pcdev);
 exit_release_mem:
@@ -645,6 +662,7 @@ static int sh_mobile_ceu_remove(struct platform_device *pdev)
        struct sh_mobile_ceu_dev *pcdev = platform_get_drvdata(pdev);
 
        soc_camera_host_unregister(&pcdev->ici);
+       clk_put(pcdev->clk);
        free_irq(pcdev->irq, pcdev);
        if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
                dma_release_declared_memory(&pdev->dev);