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clock.h
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1 /*
2  * Copyright (C) 2010, Lars-Peter Clausen <[email protected]>
3  * JZ4740 SoC clock support
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License as published by the
7  * Free Software Foundation; either version 2 of the License, or (at your
8  * option) any later version.
9  *
10  * You should have received a copy of the GNU General Public License along
11  * with this program; if not, write to the Free Software Foundation, Inc.,
12  * 675 Mass Ave, Cambridge, MA 02139, USA.
13  *
14  */
15 
16 #ifndef __MIPS_JZ4740_CLOCK_H__
17 #define __MIPS_JZ4740_CLOCK_H__
18 
19 #include <linux/list.h>
20 
22  unsigned long ext_rate;
23  unsigned long rtc_rate;
24 };
25 
27 
28 void jz4740_clock_suspend(void);
29 void jz4740_clock_resume(void);
30 
31 struct clk;
32 
33 struct clk_ops {
34  unsigned long (*get_rate)(struct clk *clk);
35  unsigned long (*round_rate)(struct clk *clk, unsigned long rate);
36  int (*set_rate)(struct clk *clk, unsigned long rate);
37  int (*enable)(struct clk *clk);
38  int (*disable)(struct clk *clk);
39  int (*is_enabled)(struct clk *clk);
40 
41  int (*set_parent)(struct clk *clk, struct clk *parent);
42 
43 };
44 
45 struct clk {
46  const char *name;
47  struct clk *parent;
48 
50 
51  const struct clk_ops *ops;
52 
53  struct list_head list;
54 
55 #ifdef CONFIG_DEBUG_FS
56  struct dentry *debugfs_entry;
57  struct dentry *debugfs_parent_entry;
58 #endif
59 
60 };
61 
62 #define JZ4740_CLK_NOT_GATED ((uint32_t)-1)
63 
64 int clk_is_enabled(struct clk *clk);
65 
66 #ifdef CONFIG_DEBUG_FS
67 void jz4740_clock_debugfs_init(void);
70 #else
71 static inline void jz4740_clock_debugfs_init(void) {};
72 static inline void jz4740_clock_debugfs_add_clk(struct clk *clk) {};
73 static inline void jz4740_clock_debugfs_update_parent(struct clk *clk) {};
74 #endif
75 
76 #endif