2 * linux/arch/arm/mach-sa1100/clock.c
4 #include <linux/module.h>
5 #include <linux/kernel.h>
6 #include <linux/list.h>
7 #include <linux/errno.h>
9 #include <linux/string.h>
10 #include <linux/clk.h>
11 #include <linux/spinlock.h>
12 #include <linux/platform_device.h>
13 #include <linux/delay.h>
15 #include <asm/clkdev.h>
16 #include <mach/pxa2xx-regs.h>
17 #include <mach/pxa2xx-gpio.h>
18 #include <mach/hardware.h>
24 static DEFINE_SPINLOCK(clocks_lock);
26 int clk_enable(struct clk *clk)
30 spin_lock_irqsave(&clocks_lock, flags);
31 if (clk->enabled++ == 0)
32 clk->ops->enable(clk);
33 spin_unlock_irqrestore(&clocks_lock, flags);
40 EXPORT_SYMBOL(clk_enable);
42 void clk_disable(struct clk *clk)
46 WARN_ON(clk->enabled == 0);
48 spin_lock_irqsave(&clocks_lock, flags);
49 if (--clk->enabled == 0)
50 clk->ops->disable(clk);
51 spin_unlock_irqrestore(&clocks_lock, flags);
53 EXPORT_SYMBOL(clk_disable);
55 unsigned long clk_get_rate(struct clk *clk)
60 if (clk->ops->getrate)
61 rate = clk->ops->getrate(clk);
65 EXPORT_SYMBOL(clk_get_rate);
68 void clk_cken_enable(struct clk *clk)
70 CKEN |= 1 << clk->cken;
73 void clk_cken_disable(struct clk *clk)
75 CKEN &= ~(1 << clk->cken);
78 const struct clkops clk_cken_ops = {
79 .enable = clk_cken_enable,
80 .disable = clk_cken_disable,
83 void clks_register(struct clk_lookup *clks, size_t num)
87 for (i = 0; i < num; i++)
91 int clk_add_alias(char *alias, struct device *alias_dev, char *id,
94 struct clk *r = clk_get(dev, id);
100 l = clkdev_alloc(r, alias, alias_dev ? dev_name(alias_dev) : NULL);