diff options
Diffstat (limited to 'arch/sh/kernel/clkdev.c')
-rw-r--r-- | arch/sh/kernel/clkdev.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/arch/sh/kernel/clkdev.c b/arch/sh/kernel/clkdev.c deleted file mode 100644 index 1f800ef4a735..000000000000 --- a/arch/sh/kernel/clkdev.c +++ /dev/null | |||
@@ -1,171 +0,0 @@ | |||
1 | /* | ||
2 | * arch/sh/kernel/clkdev.c | ||
3 | * | ||
4 | * Cloned from arch/arm/common/clkdev.c: | ||
5 | * | ||
6 | * Copyright (C) 2008 Russell King. | ||
7 | * | ||
8 | * This program is free software; you can redistribute it and/or modify | ||
9 | * it under the terms of the GNU General Public License version 2 as | ||
10 | * published by the Free Software Foundation. | ||
11 | * | ||
12 | * Helper for the clk API to assist looking up a struct clk. | ||
13 | */ | ||
14 | #include <linux/module.h> | ||
15 | #include <linux/kernel.h> | ||
16 | #include <linux/device.h> | ||
17 | #include <linux/list.h> | ||
18 | #include <linux/errno.h> | ||
19 | #include <linux/err.h> | ||
20 | #include <linux/string.h> | ||
21 | #include <linux/mutex.h> | ||
22 | #include <linux/clk.h> | ||
23 | #include <linux/slab.h> | ||
24 | #include <linux/bootmem.h> | ||
25 | #include <linux/mm.h> | ||
26 | #include <asm/clock.h> | ||
27 | #include <asm/clkdev.h> | ||
28 | |||
29 | static LIST_HEAD(clocks); | ||
30 | static DEFINE_MUTEX(clocks_mutex); | ||
31 | |||
32 | /* | ||
33 | * Find the correct struct clk for the device and connection ID. | ||
34 | * We do slightly fuzzy matching here: | ||
35 | * An entry with a NULL ID is assumed to be a wildcard. | ||
36 | * If an entry has a device ID, it must match | ||
37 | * If an entry has a connection ID, it must match | ||
38 | * Then we take the most specific entry - with the following | ||
39 | * order of precedence: dev+con > dev only > con only. | ||
40 | */ | ||
41 | static struct clk *clk_find(const char *dev_id, const char *con_id) | ||
42 | { | ||
43 | struct clk_lookup *p; | ||
44 | struct clk *clk = NULL; | ||
45 | int match, best = 0; | ||
46 | |||
47 | list_for_each_entry(p, &clocks, node) { | ||
48 | match = 0; | ||
49 | if (p->dev_id) { | ||
50 | if (!dev_id || strcmp(p->dev_id, dev_id)) | ||
51 | continue; | ||
52 | match += 2; | ||
53 | } | ||
54 | if (p->con_id) { | ||
55 | if (!con_id || strcmp(p->con_id, con_id)) | ||
56 | continue; | ||
57 | match += 1; | ||
58 | } | ||
59 | if (match == 0) | ||
60 | continue; | ||
61 | |||
62 | if (match > best) { | ||
63 | clk = p->clk; | ||
64 | best = match; | ||
65 | } | ||
66 | } | ||
67 | return clk; | ||
68 | } | ||
69 | |||
70 | struct clk *clk_get_sys(const char *dev_id, const char *con_id) | ||
71 | { | ||
72 | struct clk *clk; | ||
73 | |||
74 | mutex_lock(&clocks_mutex); | ||
75 | clk = clk_find(dev_id, con_id); | ||
76 | mutex_unlock(&clocks_mutex); | ||
77 | |||
78 | return clk ? clk : ERR_PTR(-ENOENT); | ||
79 | } | ||
80 | EXPORT_SYMBOL(clk_get_sys); | ||
81 | |||
82 | void clkdev_add(struct clk_lookup *cl) | ||
83 | { | ||
84 | mutex_lock(&clocks_mutex); | ||
85 | list_add_tail(&cl->node, &clocks); | ||
86 | mutex_unlock(&clocks_mutex); | ||
87 | } | ||
88 | EXPORT_SYMBOL(clkdev_add); | ||
89 | |||
90 | void __init clkdev_add_table(struct clk_lookup *cl, size_t num) | ||
91 | { | ||
92 | mutex_lock(&clocks_mutex); | ||
93 | while (num--) { | ||
94 | list_add_tail(&cl->node, &clocks); | ||
95 | cl++; | ||
96 | } | ||
97 | mutex_unlock(&clocks_mutex); | ||
98 | } | ||
99 | |||
100 | #define MAX_DEV_ID 20 | ||
101 | #define MAX_CON_ID 16 | ||
102 | |||
103 | struct clk_lookup_alloc { | ||
104 | struct clk_lookup cl; | ||
105 | char dev_id[MAX_DEV_ID]; | ||
106 | char con_id[MAX_CON_ID]; | ||
107 | }; | ||
108 | |||
109 | struct clk_lookup * __init_refok | ||
110 | clkdev_alloc(struct clk *clk, const char *con_id, const char *dev_fmt, ...) | ||
111 | { | ||
112 | struct clk_lookup_alloc *cla; | ||
113 | |||
114 | if (!slab_is_available()) | ||
115 | cla = alloc_bootmem_low_pages(sizeof(*cla)); | ||
116 | else | ||
117 | cla = kzalloc(sizeof(*cla), GFP_KERNEL); | ||
118 | |||
119 | if (!cla) | ||
120 | return NULL; | ||
121 | |||
122 | cla->cl.clk = clk; | ||
123 | if (con_id) { | ||
124 | strlcpy(cla->con_id, con_id, sizeof(cla->con_id)); | ||
125 | cla->cl.con_id = cla->con_id; | ||
126 | } | ||
127 | |||
128 | if (dev_fmt) { | ||
129 | va_list ap; | ||
130 | |||
131 | va_start(ap, dev_fmt); | ||
132 | vscnprintf(cla->dev_id, sizeof(cla->dev_id), dev_fmt, ap); | ||
133 | cla->cl.dev_id = cla->dev_id; | ||
134 | va_end(ap); | ||
135 | } | ||
136 | |||
137 | return &cla->cl; | ||
138 | } | ||
139 | EXPORT_SYMBOL(clkdev_alloc); | ||
140 | |||
141 | int clk_add_alias(const char *alias, const char *alias_dev_name, char *id, | ||
142 | struct device *dev) | ||
143 | { | ||
144 | struct clk *r = clk_get(dev, id); | ||
145 | struct clk_lookup *l; | ||
146 | |||
147 | if (IS_ERR(r)) | ||
148 | return PTR_ERR(r); | ||
149 | |||
150 | l = clkdev_alloc(r, alias, alias_dev_name); | ||
151 | clk_put(r); | ||
152 | if (!l) | ||
153 | return -ENODEV; | ||
154 | clkdev_add(l); | ||
155 | return 0; | ||
156 | } | ||
157 | EXPORT_SYMBOL(clk_add_alias); | ||
158 | |||
159 | /* | ||
160 | * clkdev_drop - remove a clock dynamically allocated | ||
161 | */ | ||
162 | void clkdev_drop(struct clk_lookup *cl) | ||
163 | { | ||
164 | struct clk_lookup_alloc *cla = container_of(cl, struct clk_lookup_alloc, cl); | ||
165 | |||
166 | mutex_lock(&clocks_mutex); | ||
167 | list_del(&cl->node); | ||
168 | mutex_unlock(&clocks_mutex); | ||
169 | kfree(cla); | ||
170 | } | ||
171 | EXPORT_SYMBOL(clkdev_drop); | ||