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ff5430de GL |
1 | /* |
2 | * V4L2 clock service | |
3 | * | |
4 | * Copyright (C) 2012-2013, Guennadi Liakhovetski <g.liakhovetski@gmx.de> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * ATTENTION: This is a temporary API and it shall be replaced by the generic | |
11 | * clock API, when the latter becomes widely available. | |
12 | */ | |
13 | ||
14 | #ifndef MEDIA_V4L2_CLK_H | |
15 | #define MEDIA_V4L2_CLK_H | |
16 | ||
17 | #include <linux/atomic.h> | |
18 | #include <linux/list.h> | |
19 | #include <linux/mutex.h> | |
20 | ||
21 | struct module; | |
22 | struct device; | |
23 | ||
24 | struct v4l2_clk { | |
25 | struct list_head list; | |
26 | const struct v4l2_clk_ops *ops; | |
27 | const char *dev_id; | |
28 | const char *id; | |
29 | int enable; | |
30 | struct mutex lock; /* Protect the enable count */ | |
31 | atomic_t use_count; | |
32 | void *priv; | |
33 | }; | |
34 | ||
35 | struct v4l2_clk_ops { | |
36 | struct module *owner; | |
37 | int (*enable)(struct v4l2_clk *clk); | |
38 | void (*disable)(struct v4l2_clk *clk); | |
39 | unsigned long (*get_rate)(struct v4l2_clk *clk); | |
40 | int (*set_rate)(struct v4l2_clk *clk, unsigned long); | |
41 | }; | |
42 | ||
43 | struct v4l2_clk *v4l2_clk_register(const struct v4l2_clk_ops *ops, | |
44 | const char *dev_name, | |
45 | const char *name, void *priv); | |
46 | void v4l2_clk_unregister(struct v4l2_clk *clk); | |
47 | struct v4l2_clk *v4l2_clk_get(struct device *dev, const char *id); | |
48 | void v4l2_clk_put(struct v4l2_clk *clk); | |
49 | int v4l2_clk_enable(struct v4l2_clk *clk); | |
50 | void v4l2_clk_disable(struct v4l2_clk *clk); | |
51 | unsigned long v4l2_clk_get_rate(struct v4l2_clk *clk); | |
52 | int v4l2_clk_set_rate(struct v4l2_clk *clk, unsigned long rate); | |
53 | ||
54 | #endif |