106 строки
1.8 KiB
C
106 строки
1.8 KiB
C
/*
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* linux/arch/arm/mach-sa1100/clock.c
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/errno.h>
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#include <linux/err.h>
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#include <linux/string.h>
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#include <linux/clk.h>
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#include <linux/spinlock.h>
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#include <linux/platform_device.h>
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#include <linux/delay.h>
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#include <asm/clkdev.h>
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#include <mach/pxa2xx-regs.h>
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#include <mach/hardware.h>
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#include "devices.h"
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#include "generic.h"
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#include "clock.h"
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static DEFINE_SPINLOCK(clocks_lock);
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int clk_enable(struct clk *clk)
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{
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unsigned long flags;
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spin_lock_irqsave(&clocks_lock, flags);
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if (clk->enabled++ == 0)
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clk->ops->enable(clk);
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spin_unlock_irqrestore(&clocks_lock, flags);
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if (clk->delay)
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udelay(clk->delay);
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return 0;
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}
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EXPORT_SYMBOL(clk_enable);
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void clk_disable(struct clk *clk)
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{
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unsigned long flags;
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WARN_ON(clk->enabled == 0);
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spin_lock_irqsave(&clocks_lock, flags);
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if (--clk->enabled == 0)
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clk->ops->disable(clk);
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spin_unlock_irqrestore(&clocks_lock, flags);
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}
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EXPORT_SYMBOL(clk_disable);
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unsigned long clk_get_rate(struct clk *clk)
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{
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unsigned long rate;
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rate = clk->rate;
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if (clk->ops->getrate)
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rate = clk->ops->getrate(clk);
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return rate;
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}
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EXPORT_SYMBOL(clk_get_rate);
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void clk_cken_enable(struct clk *clk)
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{
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CKEN |= 1 << clk->cken;
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}
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void clk_cken_disable(struct clk *clk)
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{
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CKEN &= ~(1 << clk->cken);
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}
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const struct clkops clk_cken_ops = {
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.enable = clk_cken_enable,
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.disable = clk_cken_disable,
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};
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void clks_register(struct clk_lookup *clks, size_t num)
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{
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int i;
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for (i = 0; i < num; i++)
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clkdev_add(&clks[i]);
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}
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int clk_add_alias(char *alias, struct device *alias_dev, char *id,
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struct device *dev)
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{
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struct clk *r = clk_get(dev, id);
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struct clk_lookup *l;
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if (!r)
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return -ENODEV;
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l = clkdev_alloc(r, alias, alias_dev ? dev_name(alias_dev) : NULL);
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clk_put(r);
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if (!l)
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return -ENODEV;
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clkdev_add(l);
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return 0;
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}
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