Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
1#ifndef __SH_CLOCK_H
2#define __SH_CLOCK_H
3
4#include <linux/list.h>
5#include <linux/seq_file.h>
6#include <linux/cpufreq.h>
7#include <linux/types.h>
8#include <linux/kref.h>
9#include <linux/clk.h>
10#include <linux/err.h>
11
12struct clk;
13
14struct clk_mapping {
15 phys_addr_t phys;
16 void __iomem *base;
17 unsigned long len;
18 struct kref ref;
19};
20
21struct clk_ops {
22#ifdef CONFIG_SH_CLK_CPG_LEGACY
23 void (*init)(struct clk *clk);
24#endif
25 int (*enable)(struct clk *clk);
26 void (*disable)(struct clk *clk);
27 unsigned long (*recalc)(struct clk *clk);
28 int (*set_rate)(struct clk *clk, unsigned long rate);
29 int (*set_parent)(struct clk *clk, struct clk *parent);
30 long (*round_rate)(struct clk *clk, unsigned long rate);
31};
32
33struct clk {
34 struct list_head node;
35 struct clk *parent;
36 struct clk **parent_table; /* list of parents to */
37 unsigned short parent_num; /* choose between */
38 unsigned char src_shift; /* source clock field in the */
39 unsigned char src_width; /* configuration register */
40 struct clk_ops *ops;
41
42 struct list_head children;
43 struct list_head sibling; /* node for children */
44
45 int usecount;
46
47 unsigned long rate;
48 unsigned long flags;
49
50 void __iomem *enable_reg;
51 unsigned int enable_bit;
52
53 unsigned long arch_flags;
54 void *priv;
55 struct clk_mapping *mapping;
56 struct cpufreq_frequency_table *freq_table;
57 unsigned int nr_freqs;
58};
59
60#define CLK_ENABLE_ON_INIT (1 << 0)
61
62/* drivers/sh/clk.c */
63unsigned long followparent_recalc(struct clk *);
64void recalculate_root_clocks(void);
65void propagate_rate(struct clk *);
66int clk_reparent(struct clk *child, struct clk *parent);
67int clk_register(struct clk *);
68void clk_unregister(struct clk *);
69void clk_enable_init_clocks(void);
70
71struct clk_div_mult_table {
72 unsigned int *divisors;
73 unsigned int nr_divisors;
74 unsigned int *multipliers;
75 unsigned int nr_multipliers;
76};
77
78struct cpufreq_frequency_table;
79void clk_rate_table_build(struct clk *clk,
80 struct cpufreq_frequency_table *freq_table,
81 int nr_freqs,
82 struct clk_div_mult_table *src_table,
83 unsigned long *bitmap);
84
85long clk_rate_table_round(struct clk *clk,
86 struct cpufreq_frequency_table *freq_table,
87 unsigned long rate);
88
89int clk_rate_table_find(struct clk *clk,
90 struct cpufreq_frequency_table *freq_table,
91 unsigned long rate);
92
93long clk_rate_div_range_round(struct clk *clk, unsigned int div_min,
94 unsigned int div_max, unsigned long rate);
95
96long clk_rate_mult_range_round(struct clk *clk, unsigned int mult_min,
97 unsigned int mult_max, unsigned long rate);
98
99long clk_round_parent(struct clk *clk, unsigned long target,
100 unsigned long *best_freq, unsigned long *parent_freq,
101 unsigned int div_min, unsigned int div_max);
102
103#define SH_CLK_MSTP32(_parent, _enable_reg, _enable_bit, _flags) \
104{ \
105 .parent = _parent, \
106 .enable_reg = (void __iomem *)_enable_reg, \
107 .enable_bit = _enable_bit, \
108 .flags = _flags, \
109}
110
111int sh_clk_mstp32_register(struct clk *clks, int nr);
112
113#define SH_CLK_DIV4(_parent, _reg, _shift, _div_bitmap, _flags) \
114{ \
115 .parent = _parent, \
116 .enable_reg = (void __iomem *)_reg, \
117 .enable_bit = _shift, \
118 .arch_flags = _div_bitmap, \
119 .flags = _flags, \
120}
121
122struct clk_div4_table {
123 struct clk_div_mult_table *div_mult_table;
124 void (*kick)(struct clk *clk);
125};
126
127int sh_clk_div4_register(struct clk *clks, int nr,
128 struct clk_div4_table *table);
129int sh_clk_div4_enable_register(struct clk *clks, int nr,
130 struct clk_div4_table *table);
131int sh_clk_div4_reparent_register(struct clk *clks, int nr,
132 struct clk_div4_table *table);
133
134#define SH_CLK_DIV6_EXT(_parent, _reg, _flags, _parents, \
135 _num_parents, _src_shift, _src_width) \
136{ \
137 .parent = _parent, \
138 .enable_reg = (void __iomem *)_reg, \
139 .flags = _flags, \
140 .parent_table = _parents, \
141 .parent_num = _num_parents, \
142 .src_shift = _src_shift, \
143 .src_width = _src_width, \
144}
145
146#define SH_CLK_DIV6(_parent, _reg, _flags) \
147 SH_CLK_DIV6_EXT(_parent, _reg, _flags, NULL, 0, 0, 0)
148
149int sh_clk_div6_register(struct clk *clks, int nr);
150int sh_clk_div6_reparent_register(struct clk *clks, int nr);
151
152#define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk }
153#define CLKDEV_DEV_ID(_id, _clk) { .dev_id = _id, .clk = _clk }
154#define CLKDEV_ICK_ID(_cid, _did, _clk) { .con_id = _cid, .dev_id = _did, .clk = _clk }
155
156#endif /* __SH_CLOCK_H */