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 sh_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
33#define SH_CLK_DIV_MSK(div) ((1 << (div)) - 1)
34#define SH_CLK_DIV4_MSK SH_CLK_DIV_MSK(4)
35#define SH_CLK_DIV6_MSK SH_CLK_DIV_MSK(6)
36
37struct clk {
38 struct list_head node;
39 struct clk *parent;
40 struct clk **parent_table;
41 unsigned short parent_num;
42 unsigned char src_shift;
43 unsigned char src_width;
44 struct sh_clk_ops *ops;
45
46 struct list_head children;
47 struct list_head sibling;
48
49 int usecount;
50
51 unsigned long rate;
52 unsigned long flags;
53
54 void __iomem *enable_reg;
55 unsigned int enable_bit;
56 void __iomem *mapped_reg;
57
58 unsigned int div_mask;
59 unsigned long arch_flags;
60 void *priv;
61 struct clk_mapping *mapping;
62 struct cpufreq_frequency_table *freq_table;
63 unsigned int nr_freqs;
64};
65
66#define CLK_ENABLE_ON_INIT BIT(0)
67
68#define CLK_ENABLE_REG_32BIT BIT(1)
69#define CLK_ENABLE_REG_16BIT BIT(2)
70#define CLK_ENABLE_REG_8BIT BIT(3)
71
72#define CLK_MASK_DIV_ON_DISABLE BIT(4)
73
74#define CLK_ENABLE_REG_MASK (CLK_ENABLE_REG_32BIT | \
75 CLK_ENABLE_REG_16BIT | \
76 CLK_ENABLE_REG_8BIT)
77
78
79unsigned long followparent_recalc(struct clk *);
80void recalculate_root_clocks(void);
81void propagate_rate(struct clk *);
82int clk_reparent(struct clk *child, struct clk *parent);
83int clk_register(struct clk *);
84void clk_unregister(struct clk *);
85void clk_enable_init_clocks(void);
86
87struct clk_div_mult_table {
88 unsigned int *divisors;
89 unsigned int nr_divisors;
90 unsigned int *multipliers;
91 unsigned int nr_multipliers;
92};
93
94struct cpufreq_frequency_table;
95void clk_rate_table_build(struct clk *clk,
96 struct cpufreq_frequency_table *freq_table,
97 int nr_freqs,
98 struct clk_div_mult_table *src_table,
99 unsigned long *bitmap);
100
101long clk_rate_table_round(struct clk *clk,
102 struct cpufreq_frequency_table *freq_table,
103 unsigned long rate);
104
105int clk_rate_table_find(struct clk *clk,
106 struct cpufreq_frequency_table *freq_table,
107 unsigned long rate);
108
109long clk_rate_div_range_round(struct clk *clk, unsigned int div_min,
110 unsigned int div_max, unsigned long rate);
111
112long clk_rate_mult_range_round(struct clk *clk, unsigned int mult_min,
113 unsigned int mult_max, unsigned long rate);
114
115long clk_round_parent(struct clk *clk, unsigned long target,
116 unsigned long *best_freq, unsigned long *parent_freq,
117 unsigned int div_min, unsigned int div_max);
118
119#define SH_CLK_MSTP(_parent, _enable_reg, _enable_bit, _flags) \
120{ \
121 .parent = _parent, \
122 .enable_reg = (void __iomem *)_enable_reg, \
123 .enable_bit = _enable_bit, \
124 .flags = _flags, \
125}
126
127#define SH_CLK_MSTP32(_p, _r, _b, _f) \
128 SH_CLK_MSTP(_p, _r, _b, _f | CLK_ENABLE_REG_32BIT)
129
130#define SH_CLK_MSTP16(_p, _r, _b, _f) \
131 SH_CLK_MSTP(_p, _r, _b, _f | CLK_ENABLE_REG_16BIT)
132
133#define SH_CLK_MSTP8(_p, _r, _b, _f) \
134 SH_CLK_MSTP(_p, _r, _b, _f | CLK_ENABLE_REG_8BIT)
135
136int sh_clk_mstp_register(struct clk *clks, int nr);
137
138
139
140
141
142
143
144static inline int __deprecated sh_clk_mstp32_register(struct clk *clks, int nr)
145{
146 return sh_clk_mstp_register(clks, nr);
147}
148
149#define SH_CLK_DIV4(_parent, _reg, _shift, _div_bitmap, _flags) \
150{ \
151 .parent = _parent, \
152 .enable_reg = (void __iomem *)_reg, \
153 .enable_bit = _shift, \
154 .arch_flags = _div_bitmap, \
155 .div_mask = SH_CLK_DIV4_MSK, \
156 .flags = _flags, \
157}
158
159struct clk_div_table {
160 struct clk_div_mult_table *div_mult_table;
161 void (*kick)(struct clk *clk);
162};
163
164#define clk_div4_table clk_div_table
165
166int sh_clk_div4_register(struct clk *clks, int nr,
167 struct clk_div4_table *table);
168int sh_clk_div4_enable_register(struct clk *clks, int nr,
169 struct clk_div4_table *table);
170int sh_clk_div4_reparent_register(struct clk *clks, int nr,
171 struct clk_div4_table *table);
172
173#define SH_CLK_DIV6_EXT(_reg, _flags, _parents, \
174 _num_parents, _src_shift, _src_width) \
175{ \
176 .enable_reg = (void __iomem *)_reg, \
177 .enable_bit = 0, \
178 .flags = _flags | CLK_MASK_DIV_ON_DISABLE, \
179 .div_mask = SH_CLK_DIV6_MSK, \
180 .parent_table = _parents, \
181 .parent_num = _num_parents, \
182 .src_shift = _src_shift, \
183 .src_width = _src_width, \
184}
185
186#define SH_CLK_DIV6(_parent, _reg, _flags) \
187{ \
188 .parent = _parent, \
189 .enable_reg = (void __iomem *)_reg, \
190 .enable_bit = 0, \
191 .div_mask = SH_CLK_DIV6_MSK, \
192 .flags = _flags | CLK_MASK_DIV_ON_DISABLE, \
193}
194
195int sh_clk_div6_register(struct clk *clks, int nr);
196int sh_clk_div6_reparent_register(struct clk *clks, int nr);
197
198#define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk }
199#define CLKDEV_DEV_ID(_id, _clk) { .dev_id = _id, .clk = _clk }
200#define CLKDEV_ICK_ID(_cid, _did, _clk) { .con_id = _cid, .dev_id = _did, .clk = _clk }
201
202#endif
203
