[xburst] jz4740 pm: Fix gpio suspend/resume. Turn pll off while in suspend and gate
[openwrt/svn-archive/archive.git] / target / linux / xburst / files-2.6.32 / arch / mips / jz4740 / clock.h
1 /*
2 * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
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 __JZ4740_CLOCK_H__
17 #define __JZ4740_CLOCK_H__
18
19 struct jz4740_clock_board_data {
20 unsigned long ext_rate;
21 unsigned long rtc_rate;
22 };
23
24 extern struct jz4740_clock_board_data jz4740_clock_bdata;
25
26 int jz4740_clock_init(void);
27 void jz4740_clock_suspend(void);
28 void jz4740_clock_resume(void);
29
30 struct clk;
31
32 struct clk_ops {
33 unsigned long (*get_rate)(struct clk* clk);
34 unsigned long (*round_rate)(struct clk *clk, unsigned long rate);
35 int (*set_rate)(struct clk* clk, unsigned long rate);
36 int (*enable)(struct clk* clk);
37 int (*disable)(struct clk* clk);
38 int (*is_enabled)(struct clk* clk);
39
40 int (*set_parent)(struct clk* clk, struct clk *parent);
41
42 };
43
44 struct clk {
45 const char *name;
46 struct clk* parent;
47
48 uint32_t gate_bit;
49
50 const struct clk_ops *ops;
51
52 struct list_head list;
53
54 #ifdef CONFIG_DEBUG_FS
55 struct dentry *debugfs_entry;
56 struct dentry *debugfs_parent_entry;
57 #endif
58
59 };
60
61 #define JZ4740_CLK_NOT_GATED ((uint32_t)-1)
62
63 int clk_is_enabled(struct clk *clk);
64
65 #ifdef CONFIG_DEBUG_FS
66 void jz4740_clock_debugfs_init(void);
67 void jz4740_clock_debugfs_add_clk(struct clk *clk);
68 void jz4740_clock_debugfs_update_parent(struct clk *clk);
69 #else
70 static inline void jz4740_clock_debugfs_init(void) {};
71 static inline void jz4740_clock_debugfs_add_clk(struct clk *clk) {};
72 static inline void jz4740_clock_debugfs_update_parent(struct clk *clk) {};
73 #endif
74
75 #endif