/* * linux/arch/arm/mach-sa1100/clock.c */ #include #include #include #include #include #include #include #include #include #include #include #include #include #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; }