/* * 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); 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, };