2 * linux/arch/arm/mach-sa1100/clock.c
4 #include <linux/module.h>
5 #include <linux/kernel.h>
7 #include <linux/spinlock.h>
8 #include <linux/delay.h>
9 #include <linux/clkdev.h>
13 static DEFINE_SPINLOCK(clocks_lock);
15 int clk_enable(struct clk *clk)
19 spin_lock_irqsave(&clocks_lock, flags);
20 if (clk->enabled++ == 0)
21 clk->ops->enable(clk);
22 spin_unlock_irqrestore(&clocks_lock, flags);
29 EXPORT_SYMBOL(clk_enable);
31 void clk_disable(struct clk *clk)
35 WARN_ON(clk->enabled == 0);
37 spin_lock_irqsave(&clocks_lock, flags);
38 if (--clk->enabled == 0)
39 clk->ops->disable(clk);
40 spin_unlock_irqrestore(&clocks_lock, flags);
42 EXPORT_SYMBOL(clk_disable);
44 unsigned long clk_get_rate(struct clk *clk)
49 if (clk->ops->getrate)
50 rate = clk->ops->getrate(clk);
54 EXPORT_SYMBOL(clk_get_rate);
56 void clk_dummy_enable(struct clk *clk)
60 void clk_dummy_disable(struct clk *clk)
64 const struct clkops clk_dummy_ops = {
65 .enable = clk_dummy_enable,
66 .disable = clk_dummy_disable,
69 struct clk clk_dummy = {
70 .ops = &clk_dummy_ops,