1 /* SPDX-License-Identifier: GPL-2.0-only */
5 * Copyright (C) 2012-2013, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
7 * ATTENTION: This is a temporary API and it shall be replaced by the generic
8 * clock API, when the latter becomes widely available.
11 #ifndef MEDIA_V4L2_CLK_H
12 #define MEDIA_V4L2_CLK_H
14 #include <linux/atomic.h>
15 #include <linux/export.h>
16 #include <linux/list.h>
17 #include <linux/mutex.h>
24 struct list_head list;
25 const struct v4l2_clk_ops *ops;
28 struct mutex lock; /* Protect the enable count */
36 int (*enable)(struct v4l2_clk *clk);
37 void (*disable)(struct v4l2_clk *clk);
38 unsigned long (*get_rate)(struct v4l2_clk *clk);
39 int (*set_rate)(struct v4l2_clk *clk, unsigned long);
42 struct v4l2_clk *v4l2_clk_register(const struct v4l2_clk_ops *ops,
45 void v4l2_clk_unregister(struct v4l2_clk *clk);
46 struct v4l2_clk *v4l2_clk_get(struct device *dev, const char *id);
47 void v4l2_clk_put(struct v4l2_clk *clk);
48 int v4l2_clk_enable(struct v4l2_clk *clk);
49 void v4l2_clk_disable(struct v4l2_clk *clk);
50 unsigned long v4l2_clk_get_rate(struct v4l2_clk *clk);
51 int v4l2_clk_set_rate(struct v4l2_clk *clk, unsigned long rate);
55 struct v4l2_clk *__v4l2_clk_register_fixed(const char *dev_id,
56 unsigned long rate, struct module *owner);
57 void v4l2_clk_unregister_fixed(struct v4l2_clk *clk);
59 static inline struct v4l2_clk *v4l2_clk_register_fixed(const char *dev_id,
62 return __v4l2_clk_register_fixed(dev_id, rate, THIS_MODULE);
65 #define V4L2_CLK_NAME_SIZE 64
67 #define v4l2_clk_name_i2c(name, size, adap, client) snprintf(name, size, \
68 "%d-%04x", adap, client)
70 #define v4l2_clk_name_of(name, size, node) snprintf(name, size, \