1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
/*
* Copyright 2005-2011 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright 2008 Juergen Beisert, kernel@pengutronix.de
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#ifndef __ASM_ARCH_MXC_CLOCK_H__
#define __ASM_ARCH_MXC_CLOCK_H__
#ifndef __ASSEMBLY__
#include <linux/list.h>
#define CLK_NAME_LEN 32
struct module;
struct clk {
#ifdef CONFIG_CLK_DEBUG
char name[CLK_NAME_LEN];
struct dentry *dentry;
#endif
int id;
/* Source clock this clk depends on */
struct clk *parent;
/* Secondary clock to enable/disable with this clock */
struct clk *secondary;
/* Reference count of clock enable/disable */
__s8 usecount;
/* Register bit position for clock's enable/disable control. */
u8 enable_shift;
/* Register address for clock's enable/disable control. */
void __iomem *enable_reg;
u32 flags;
/* get the current clock rate (always a fresh value) */
unsigned long (*get_rate) (struct clk *);
/* Function ptr to set the clock to a new rate. The rate must match a
supported rate returned from round_rate. Leave blank if clock is not
programmable */
int (*set_rate) (struct clk *, unsigned long);
/* Function ptr to round the requested clock rate to the nearest
supported rate that is less than or equal to the requested rate. */
unsigned long (*round_rate) (struct clk *, unsigned long);
/* Function ptr to enable the clock. Leave blank if clock can not
be gated. */
int (*enable) (struct clk *);
/* Function ptr to disable the clock. Leave blank if clock can not
be gated. */
void (*disable) (struct clk *);
/* Function ptr to set the parent clock of the clock. */
int (*set_parent) (struct clk *, struct clk *);
};
int clk_get_usecount(struct clk *clk);
int clk_register(struct clk *clk);
void clk_unregister(struct clk *clk);
/* Clock flags */
#define RATE_PROPAGATES (1 << 0) /* Program children too */
#define ALWAYS_ENABLED (1 << 1) /* Clock cannot be disabled */
#define RATE_FIXED (1 << 2) /* Fixed clock rate */
#define CPU_FREQ_TRIG_UPDATE (1 << 3) /* CPUFREQ trig update */
#define AHB_HIGH_SET_POINT (1 << 4) /* Requires max AHB clock */
#define AHB_MED_SET_POINT (1 << 5) /* Requires med AHB clock */
unsigned long mxc_decode_pll(unsigned int pll, u32 f_ref);
#ifdef CONFIG_CLK_DEBUG
void clk_debug_register(struct clk *clk);
#else
static inline void clk_debug_register(struct clk *clk) {}
#endif
#endif /* __ASSEMBLY__ */
#endif /* __ASM_ARCH_MXC_CLOCK_H__ */
|
