1 files changed, 54 insertions, 0 deletions

diff --git a/include/media/v4l2-clk.h b/include/media/v4l2-clk.h
new file mode 100644
index 000000000000..0503a90b48bb
--- /dev/null
+++ b/include/media/v4l2-clk.h
@@ -0,0 +1,54 @@
+/*
+ * V4L2 clock service
+ *
+ * Copyright (C) 2012-2013, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * ATTENTION: This is a temporary API and it shall be replaced by the generic
+ * clock API, when the latter becomes widely available.
+ */
+
+#ifndef MEDIA_V4L2_CLK_H
+#define MEDIA_V4L2_CLK_H
+
+#include <linux/atomic.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+
+struct module;
+struct device;
+
+struct v4l2_clk {
+        struct list_head list;
+        const struct v4l2_clk_ops *ops;
+        const char *dev_id;
+        const char *id;
+        int enable;
+        struct mutex lock; /* Protect the enable count */
+        atomic_t use_count;
+        void *priv;
+};
+
+struct v4l2_clk_ops {
+        struct module   *owner;
+        int             (*enable)(struct v4l2_clk *clk);
+        void            (*disable)(struct v4l2_clk *clk);
+        unsigned long   (*get_rate)(struct v4l2_clk *clk);
+        int             (*set_rate)(struct v4l2_clk *clk, unsigned long);
+};
+
+struct v4l2_clk *v4l2_clk_register(const struct v4l2_clk_ops *ops,
+                                   const char *dev_name,
+                                   const char *name, void *priv);
+void v4l2_clk_unregister(struct v4l2_clk *clk);
+struct v4l2_clk *v4l2_clk_get(struct device *dev, const char *id);
+void v4l2_clk_put(struct v4l2_clk *clk);
+int v4l2_clk_enable(struct v4l2_clk *clk);
+void v4l2_clk_disable(struct v4l2_clk *clk);
+unsigned long v4l2_clk_get_rate(struct v4l2_clk *clk);
+int v4l2_clk_set_rate(struct v4l2_clk *clk, unsigned long rate);
+
+#endif