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path: root/drivers/media/video/sh_mobile_ceu_camera.c
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Diffstat (limited to 'drivers/media/video/sh_mobile_ceu_camera.c')
-rw-r--r--drivers/media/video/sh_mobile_ceu_camera.c41
1 files changed, 25 insertions, 16 deletions
diff --git a/drivers/media/video/sh_mobile_ceu_camera.c b/drivers/media/video/sh_mobile_ceu_camera.c
index e86878deea7..61c47b82408 100644
--- a/drivers/media/video/sh_mobile_ceu_camera.c
+++ b/drivers/media/video/sh_mobile_ceu_camera.c
@@ -30,7 +30,7 @@
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/videodev2.h>
-#include <linux/clk.h>
+#include <linux/pm_runtime.h>
#include <media/v4l2-common.h>
#include <media/v4l2-dev.h>
@@ -86,7 +86,6 @@ struct sh_mobile_ceu_dev {
unsigned int irq;
void __iomem *base;
- struct clk *clk;
unsigned long video_limit;
/* lock used to protect videobuf */
@@ -361,7 +360,7 @@ static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
if (ret)
goto err;
- clk_enable(pcdev->clk);
+ pm_runtime_get_sync(ici->dev);
ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
while (ceu_read(pcdev, CSTSR) & 1)
@@ -395,7 +394,7 @@ static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
}
spin_unlock_irqrestore(&pcdev->lock, flags);
- clk_disable(pcdev->clk);
+ pm_runtime_put_sync(ici->dev);
icd->ops->release(icd);
@@ -798,7 +797,6 @@ 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;
@@ -862,13 +860,9 @@ 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;
- }
+ pm_suspend_ignore_children(&pdev->dev, true);
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_resume(&pdev->dev);
pcdev->ici.priv = pcdev;
pcdev->ici.dev = &pdev->dev;
@@ -878,12 +872,10 @@ static int sh_mobile_ceu_probe(struct platform_device *pdev)
err = soc_camera_host_register(&pcdev->ici);
if (err)
- goto exit_free_clk;
+ goto exit_free_irq;
return 0;
-exit_free_clk:
- clk_put(pcdev->clk);
exit_free_irq:
free_irq(pcdev->irq, pcdev);
exit_release_mem:
@@ -904,7 +896,6 @@ static int sh_mobile_ceu_remove(struct platform_device *pdev)
struct sh_mobile_ceu_dev, ici);
soc_camera_host_unregister(soc_host);
- clk_put(pcdev->clk);
free_irq(pcdev->irq, pcdev);
if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
dma_release_declared_memory(&pdev->dev);
@@ -913,9 +904,27 @@ static int sh_mobile_ceu_remove(struct platform_device *pdev)
return 0;
}
+static int sh_mobile_ceu_runtime_nop(struct device *dev)
+{
+ /* Runtime PM callback shared between ->runtime_suspend()
+ * and ->runtime_resume(). Simply returns success.
+ *
+ * This driver re-initializes all registers after
+ * pm_runtime_get_sync() anyway so there is no need
+ * to save and restore registers here.
+ */
+ return 0;
+}
+
+static struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
+ .runtime_suspend = sh_mobile_ceu_runtime_nop,
+ .runtime_resume = sh_mobile_ceu_runtime_nop,
+};
+
static struct platform_driver sh_mobile_ceu_driver = {
.driver = {
.name = "sh_mobile_ceu",
+ .pm = &sh_mobile_ceu_dev_pm_ops,
},
.probe = sh_mobile_ceu_probe,
.remove = sh_mobile_ceu_remove,