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/*
* linux/arch/arm/mach-sa1100/clock.c
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/spinlock.h>
#include <linux/delay.h>
#include <linux/clkdev.h>
#include "clock.h"
static DEFINE_SPINLOCK(clocks_lock);
int clk_enable(struct clk *clk)
{
unsigned long flags;
spin_lock_irqsave(&clocks_lock, flags);
if (clk->enabled++ == 0)
clk->ops->enable(clk);
spin_unlock_irqrestore(&clocks_lock, flags);
if (clk->delay)
udelay(clk->delay);
return 0;
}
EXPORT_SYMBOL(clk_enable);
void clk_disable(struct clk *clk)
{
unsigned long flags;
WARN_ON(clk->enabled == 0);
spin_lock_irqsave(&clocks_lock, flags);
if (--clk->enabled == 0)
clk->ops->disable(clk);
spin_unlock_irqrestore(&clocks_lock, flags);
}
EXPORT_SYMBOL(clk_disable);
unsigned long clk_get_rate(struct clk *clk)
{
unsigned long rate;
rate = clk->rate;
if (clk->ops->getrate)
rate = clk->ops->getrate(clk);
return rate;
}
EXPORT_SYMBOL(clk_get_rate);
int clk_set_rate(struct clk *clk, unsigned long rate)
{
unsigned long flags;
int ret = -EINVAL;
if (clk->ops->setrate) {
spin_lock_irqsave(&clocks_lock, flags);
ret = clk->ops->setrate(clk, rate);
spin_unlock_irqrestore(&clocks_lock, flags);
}
return ret;
}
EXPORT_SYMBOL(clk_set_rate);
void clk_dummy_enable(struct clk *clk)
{
}
void clk_dummy_disable(struct clk *clk)
{
}
const struct clkops clk_dummy_ops = {
.enable = clk_dummy_enable,
.disable = clk_dummy_disable,
};
struct clk clk_dummy = {
.ops = &clk_dummy_ops,
};
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