Root/arch/mips/jz4740/clock.h

Source at commit 694c7fbe86b8a9c91392e505afcb9fcfc91deccc created 11 years 6 months ago.
By Maarten ter Huurne, MIPS: JZ4740: Add cpufreq support
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 __MIPS_JZ4740_CLOCK_H__
17#define __MIPS_JZ4740_CLOCK_H__
18
19#include <linux/list.h>
20#include <linux/types.h>
21
22struct jz4740_clock_board_data {
23    unsigned long ext_rate;
24    unsigned long rtc_rate;
25};
26
27extern struct jz4740_clock_board_data jz4740_clock_bdata;
28
29void jz4740_clock_suspend(void);
30void jz4740_clock_resume(void);
31
32struct clk;
33
34struct clk_ops {
35    unsigned long (*get_rate)(struct clk *clk);
36    unsigned long (*round_rate)(struct clk *clk, unsigned long rate);
37    int (*set_rate)(struct clk *clk, unsigned long rate);
38    int (*enable)(struct clk *clk);
39    int (*disable)(struct clk *clk);
40    int (*is_enabled)(struct clk *clk);
41
42    int (*set_parent)(struct clk *clk, struct clk *parent);
43
44};
45
46struct clk {
47    const char *name;
48    struct clk *parent;
49
50    uint32_t gate_bit;
51
52    const struct clk_ops *ops;
53
54    struct list_head list;
55
56#ifdef CONFIG_DEBUG_FS
57    struct dentry *debugfs_entry;
58    struct dentry *debugfs_parent_entry;
59#endif
60
61};
62
63#define JZ4740_CLK_NOT_GATED ((uint32_t)-1)
64
65int clk_is_enabled(struct clk *clk);
66
67int clk_main_set_dividers(bool immediate, unsigned int cdiv, unsigned int hdiv,
68              unsigned int mdiv, unsigned int pdiv);
69
70#ifdef CONFIG_DEBUG_FS
71void jz4740_clock_debugfs_init(void);
72void jz4740_clock_debugfs_add_clk(struct clk *clk);
73void jz4740_clock_debugfs_update_parent(struct clk *clk);
74#else
75static inline void jz4740_clock_debugfs_init(void) {};
76static inline void jz4740_clock_debugfs_add_clk(struct clk *clk) {};
77static inline void jz4740_clock_debugfs_update_parent(struct clk *clk) {};
78#endif
79
80#endif
81

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