Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / media / v4l2-clk.h

diff --git a/kernel/include/media/v4l2-clk.h b/kernel/include/media/v4l2-clk.h
new file mode 100644 (file)
index 0000000..3ef6e3d
--- /dev/null
+++ b/kernel/include/media/v4l2-clk.h
@@ -0,0 +1,71 @@
+/*
+ * 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/export.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+
+struct module;
+struct device;
+
+struct clk;
+struct v4l2_clk {
+       struct list_head list;
+       const struct v4l2_clk_ops *ops;
+       const char *dev_id;
+       int enable;
+       struct mutex lock; /* Protect the enable count */
+       atomic_t use_count;
+       struct clk *clk;
+       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,
+                                  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);
+
+struct module;
+
+struct v4l2_clk *__v4l2_clk_register_fixed(const char *dev_id,
+                       unsigned long rate, struct module *owner);
+void v4l2_clk_unregister_fixed(struct v4l2_clk *clk);
+
+static inline struct v4l2_clk *v4l2_clk_register_fixed(const char *dev_id,
+                                                       unsigned long rate)
+{
+       return __v4l2_clk_register_fixed(dev_id, rate, THIS_MODULE);
+}
+
+#define v4l2_clk_name_i2c(name, size, adap, client) snprintf(name, size, \
+                         "%d-%04x", adap, client)
+
+#endif