sh: sh_mobile ceu clock framework support

Add clock framework support to the sh_mobile ceu and
adjust the board specific code accordingly.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

3 files changed, 21 insertions, 3 deletions

diff --git a/arch/sh/boards/board-ap325rxa.c b/arch/sh/boards/board-ap325rxa.c
index 8881a643ac32..0afaebad7b76 100644
--- a/arch/sh/boards/board-ap325rxa.c
+++ b/arch/sh/boards/board-ap325rxa.c
@@ -303,6 +303,7 @@ static struct resource ceu_resources[] = {
 
 static struct platform_device ceu_device = {
         .name           = "sh_mobile_ceu",
+        .id             = 0, /* "ceu0" clock */
         .num_resources  = ARRAY_SIZE(ceu_resources),
         .resource       = ceu_resources,
         .dev            = {
@@ -375,7 +376,6 @@ static int __init ap325rxa_devices_setup(void)
         gpio_direction_output(GPIO_PTS3, 1);
 
         /* CEU */
-        clk_always_enable("mstp203");
         gpio_request(GPIO_FN_VIO_CLK2, NULL);
         gpio_request(GPIO_FN_VIO_VD2, NULL);
         gpio_request(GPIO_FN_VIO_HD2, NULL);
diff --git a/arch/sh/boards/mach-migor/setup.c b/arch/sh/boards/mach-migor/setup.c
index 95dea1b02565..3684f198cfdf 100644
--- a/arch/sh/boards/mach-migor/setup.c
+++ b/arch/sh/boards/mach-migor/setup.c
@@ -433,6 +433,7 @@ static struct resource migor_ceu_resources[] = {
 
 static struct platform_device migor_ceu_device = {
         .name           = "sh_mobile_ceu",
+        .id             = 0, /* "ceu0" clock */
         .num_resources  = ARRAY_SIZE(migor_ceu_resources),
         .resource       = migor_ceu_resources,
         .dev    = {
@@ -554,7 +555,6 @@ static int __init migor_devices_setup(void)
 #endif
 
         /* CEU */
-        clk_always_enable("mstp203"); /* CEU */
         gpio_request(GPIO_FN_VIO_CLK2, NULL);
         gpio_request(GPIO_FN_VIO_VD2, NULL);
         gpio_request(GPIO_FN_VIO_HD2, NULL);
diff --git a/drivers/media/video/sh_mobile_ceu_camera.c b/drivers/media/video/sh_mobile_ceu_camera.c
index 2407607f2eff..536b1a9b310c 100644
--- 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);