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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - arch/arm/mach-aaec2000/clock.c
2 * linux/arch/arm/mach-aaec2000/clock.c
4 * Copyright (C) 2005 Nicolas Bellido Y Ortega
6 * Based on linux/arch/arm/mach-integrator/clock.c
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.
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/list.h>
15 #include <linux/errno.h>
16 #include <linux/err.h>
17 #include <linux/string.h>
18 #include <linux/clk.h>
19 #include <linux/mutex.h>
21 #include <asm/semaphore.h>
25 static LIST_HEAD(clocks
);
26 static DEFINE_MUTEX(clocks_mutex
);
28 struct clk
*clk_get(struct device
*dev
, const char *id
)
30 struct clk
*p
, *clk
= ERR_PTR(-ENOENT
);
32 mutex_lock(&clocks_mutex
);
33 list_for_each_entry(p
, &clocks
, node
) {
34 if (strcmp(id
, p
->name
) == 0 && try_module_get(p
->owner
)) {
39 mutex_unlock(&clocks_mutex
);
43 EXPORT_SYMBOL(clk_get
);
45 void clk_put(struct clk
*clk
)
47 module_put(clk
->owner
);
49 EXPORT_SYMBOL(clk_put
);
51 int clk_enable(struct clk
*clk
)
55 EXPORT_SYMBOL(clk_enable
);
57 void clk_disable(struct clk
*clk
)
60 EXPORT_SYMBOL(clk_disable
);
62 unsigned long clk_get_rate(struct clk
*clk
)
66 EXPORT_SYMBOL(clk_get_rate
);
68 long clk_round_rate(struct clk
*clk
, unsigned long rate
)
72 EXPORT_SYMBOL(clk_round_rate
);
74 int clk_set_rate(struct clk
*clk
, unsigned long rate
)
78 EXPORT_SYMBOL(clk_set_rate
);
80 int clk_register(struct clk
*clk
)
82 mutex_lock(&clocks_mutex
);
83 list_add(&clk
->node
, &clocks
);
84 mutex_unlock(&clocks_mutex
);
87 EXPORT_SYMBOL(clk_register
);
89 void clk_unregister(struct clk
*clk
)
91 mutex_lock(&clocks_mutex
);
93 mutex_unlock(&clocks_mutex
);
95 EXPORT_SYMBOL(clk_unregister
);
97 static int __init
clk_init(void)
101 arch_initcall(clk_init
);