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-rw-r--r--drivers/media/video/davinci/vpif.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/media/video/davinci/vpif.c b/drivers/media/video/davinci/vpif.c
index 8c4ff14377ad..b3637aff8fee 100644
--- a/drivers/media/video/davinci/vpif.c
+++ b/drivers/media/video/davinci/vpif.c
@@ -23,6 +23,8 @@
#include <linux/spinlock.h>
#include <linux/kernel.h>
#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/err.h>
#include <mach/hardware.h>
#include "vpif.h"
@@ -40,6 +42,7 @@ static struct resource *res;
spinlock_t vpif_lock;
void __iomem *vpif_base;
+struct clk *vpif_clk;
/**
* ch_params: video standard configuration parameters for vpif
@@ -434,10 +437,19 @@ static int __init vpif_probe(struct platform_device *pdev)
goto fail;
}
+ vpif_clk = clk_get(&pdev->dev, "vpif");
+ if (IS_ERR(vpif_clk)) {
+ status = PTR_ERR(vpif_clk);
+ goto clk_fail;
+ }
+ clk_enable(vpif_clk);
+
spin_lock_init(&vpif_lock);
dev_info(&pdev->dev, "vpif probe success\n");
return 0;
+clk_fail:
+ iounmap(vpif_base);
fail:
release_mem_region(res->start, res_len);
return status;
@@ -445,15 +457,44 @@ fail:
static int __devexit vpif_remove(struct platform_device *pdev)
{
+ if (vpif_clk) {
+ clk_disable(vpif_clk);
+ clk_put(vpif_clk);
+ }
+
iounmap(vpif_base);
release_mem_region(res->start, res_len);
return 0;
}
+#ifdef CONFIG_PM
+static int vpif_suspend(struct device *dev)
+{
+ clk_disable(vpif_clk);
+ return 0;
+}
+
+static int vpif_resume(struct device *dev)
+{
+ clk_enable(vpif_clk);
+ return 0;
+}
+
+static const struct dev_pm_ops vpif_pm = {
+ .suspend = vpif_suspend,
+ .resume = vpif_resume,
+};
+
+#define vpif_pm_ops (&vpif_pm)
+#else
+#define vpif_pm_ops NULL
+#endif
+
static struct platform_driver vpif_driver = {
.driver = {
.name = "vpif",
.owner = THIS_MODULE,
+ .pm = vpif_pm_ops,
},
.remove = __devexit_p(vpif_remove),
.probe = vpif_probe,