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/*
* linux/arch/arm/mach-sa1100/clock.c
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/string.h>
#include <linux/clk.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <asm/clkdev.h>
#include <mach/pxa2xx-regs.h>
#include <mach/pxa2xx-gpio.h>
#include <mach/hardware.h>
#include "devices.h"
#include "generic.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);
void clk_cken_enable(struct clk *clk)
{
CKEN |= 1 << clk->cken;
}
void clk_cken_disable(struct clk *clk)
{
CKEN &= ~(1 << clk->cken);
}
const struct clkops clk_cken_ops = {
.enable = clk_cken_enable,
.disable = clk_cken_disable,
};
void clks_register(struct clk_lookup *clks, size_t num)
{
int i;
for (i = 0; i < num; i++)
clkdev_add(&clks[i]);
}
int clk_add_alias(char *alias, struct device *alias_dev, char *id,
struct device *dev)
{
struct clk *r = clk_get(dev, id);
struct clk_lookup *l;
if (!r)
return -ENODEV;
l = clkdev_alloc(r, alias, alias_dev ? dev_name(alias_dev) : NULL);
clk_put(r);
if (!l)
return -ENODEV;
clkdev_add(l);
return 0;
}
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