1 #ifndef __ASM_SH_CLOCK_H
2 #define __ASM_SH_CLOCK_H
3
4 #include <linux/kref.h>
5 #include <linux/list.h>
6 #include <linux/seq_file.h>
7 #include <linux/clk.h>
8 #include <linux/err.h>
9
10 struct clk;
11
12 struct clk_ops {
13 void (*init)(struct clk *clk);
14 void (*enable)(struct clk *clk);
15 void (*disable)(struct clk *clk);
16 void (*recalc)(struct clk *clk);
17 int (*set_rate)(struct clk *clk, unsigned long rate, int algo_id);
18 long (*round_rate)(struct clk *clk, unsigned long rate);
19 };
20
21 struct clk {
22 struct list_head node;
23 const char *name;
24 int id;
25 struct module *owner;
26
27 struct clk *parent;
28 struct clk_ops *ops;
29
30 struct kref kref;
31
32 unsigned long rate;
33 unsigned long flags;
34 unsigned long arch_flags;
35 };
36
37 #define CLK_ALWAYS_ENABLED (1 << 0)
38 #define CLK_RATE_PROPAGATES (1 << 1)
39
40 /* Should be defined by processor-specific code */
41 void arch_init_clk_ops(struct clk_ops **, int type);
42 int __init arch_clk_init(void);
43
44 /* arch/sh/kernel/cpu/clock.c */
45 int clk_init(void);
46
47 void clk_recalc_rate(struct clk *);
48
49 int clk_register(struct clk *);
50 void clk_unregister(struct clk *);
51
clk_always_enable(const char * id)52 static inline int clk_always_enable(const char *id)
53 {
54 struct clk *clk;
55 int ret;
56
57 clk = clk_get(NULL, id);
58 if (IS_ERR(clk))
59 return PTR_ERR(clk);
60
61 ret = clk_enable(clk);
62 if (ret)
63 clk_put(clk);
64
65 return ret;
66 }
67
68 /* the exported API, in addition to clk_set_rate */
69 /**
70 * clk_set_rate_ex - set the clock rate for a clock source, with additional parameter
71 * @clk: clock source
72 * @rate: desired clock rate in Hz
73 * @algo_id: algorithm id to be passed down to ops->set_rate
74 *
75 * Returns success (0) or negative errno.
76 */
77 int clk_set_rate_ex(struct clk *clk, unsigned long rate, int algo_id);
78
79 enum clk_sh_algo_id {
80 NO_CHANGE = 0,
81
82 IUS_N1_N1,
83 IUS_322,
84 IUS_522,
85 IUS_N11,
86
87 SB_N1,
88
89 SB3_N1,
90 SB3_32,
91 SB3_43,
92 SB3_54,
93
94 BP_N1,
95
96 IP_N1,
97 };
98 #endif /* __ASM_SH_CLOCK_H */
99