Linux Kernel  3.7.1
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clock.h
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1 /*
2  * linux/arch/arm/mach-mmp/clock.h
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation.
7  */
8 
9 #include <linux/clkdev.h>
10 
11 struct clkops {
12  void (*enable)(struct clk *);
13  void (*disable)(struct clk *);
14  unsigned long (*getrate)(struct clk *);
15  int (*setrate)(struct clk *, unsigned long);
16 };
17 
18 struct clk {
19  const struct clkops *ops;
20 
21  void __iomem *clk_rst; /* clock reset control register */
22  int fnclksel; /* functional clock select (APBC) */
23  uint32_t enable_val; /* value for clock enable (APMU) */
24  unsigned long rate;
25  int enabled;
26 };
27 
28 extern struct clkops apbc_clk_ops;
29 extern struct clkops apmu_clk_ops;
30 
31 #define APBC_CLK(_name, _reg, _fnclksel, _rate) \
32 struct clk clk_##_name = { \
33  .clk_rst = APBC_##_reg, \
34  .fnclksel = _fnclksel, \
35  .rate = _rate, \
36  .ops = &apbc_clk_ops, \
37 }
38 
39 #define APBC_CLK_OPS(_name, _reg, _fnclksel, _rate, _ops) \
40 struct clk clk_##_name = { \
41  .clk_rst = APBC_##_reg, \
42  .fnclksel = _fnclksel, \
43  .rate = _rate, \
44  .ops = _ops, \
45 }
46 
47 #define APMU_CLK(_name, _reg, _eval, _rate) \
48 struct clk clk_##_name = { \
49  .clk_rst = APMU_##_reg, \
50  .enable_val = _eval, \
51  .rate = _rate, \
52  .ops = &apmu_clk_ops, \
53 }
54 
55 #define APMU_CLK_OPS(_name, _reg, _eval, _rate, _ops) \
56 struct clk clk_##_name = { \
57  .clk_rst = APMU_##_reg, \
58  .enable_val = _eval, \
59  .rate = _rate, \
60  .ops = _ops, \
61 }
62 
63 #define INIT_CLKREG(_clk, _devname, _conname) \
64  { \
65  .clk = _clk, \
66  .dev_id = _devname, \
67  .con_id = _conname, \
68  }
69 
70 extern struct clk clk_pxa168_gpio;
71 extern struct clk clk_pxa168_timers;