]>
Commit | Line | Data |
---|---|---|
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> | |
cf326dfe | 18 | #include <linux/export.h> |
ff5430de GL |
19 | #include <linux/list.h> |
20 | #include <linux/mutex.h> | |
21 | ||
22 | struct module; | |
23 | struct device; | |
24 | ||
25 | struct v4l2_clk { | |
26 | struct list_head list; | |
27 | const struct v4l2_clk_ops *ops; | |
28 | const char *dev_id; | |
29 | const char *id; | |
30 | int enable; | |
31 | struct mutex lock; /* Protect the enable count */ | |
32 | atomic_t use_count; | |
33 | void *priv; | |
34 | }; | |
35 | ||
36 | struct v4l2_clk_ops { | |
37 | struct module *owner; | |
38 | int (*enable)(struct v4l2_clk *clk); | |
39 | void (*disable)(struct v4l2_clk *clk); | |
40 | unsigned long (*get_rate)(struct v4l2_clk *clk); | |
41 | int (*set_rate)(struct v4l2_clk *clk, unsigned long); | |
42 | }; | |
43 | ||
44 | struct v4l2_clk *v4l2_clk_register(const struct v4l2_clk_ops *ops, | |
45 | const char *dev_name, | |
46 | const char *name, void *priv); | |
47 | void v4l2_clk_unregister(struct v4l2_clk *clk); | |
48 | struct v4l2_clk *v4l2_clk_get(struct device *dev, const char *id); | |
49 | void v4l2_clk_put(struct v4l2_clk *clk); | |
50 | int v4l2_clk_enable(struct v4l2_clk *clk); | |
51 | void v4l2_clk_disable(struct v4l2_clk *clk); | |
52 | unsigned long v4l2_clk_get_rate(struct v4l2_clk *clk); | |
53 | int v4l2_clk_set_rate(struct v4l2_clk *clk, unsigned long rate); | |
54 | ||
cf326dfe GL |
55 | struct module; |
56 | ||
57 | struct v4l2_clk *__v4l2_clk_register_fixed(const char *dev_id, | |
58 | const char *id, unsigned long rate, struct module *owner); | |
59 | void v4l2_clk_unregister_fixed(struct v4l2_clk *clk); | |
60 | ||
61 | static inline struct v4l2_clk *v4l2_clk_register_fixed(const char *dev_id, | |
62 | const char *id, | |
63 | unsigned long rate) | |
64 | { | |
65 | return __v4l2_clk_register_fixed(dev_id, id, rate, THIS_MODULE); | |
66 | } | |
67 | ||
774cc4c2 GL |
68 | #define v4l2_clk_name_i2c(name, size, adap, client) snprintf(name, size, \ |
69 | "%d-%04x", adap, client) | |
70 | ||
ff5430de | 71 | #endif |