From bbc9ac6d8d4160c604e158dfc0bcac0d40fb4c5b Mon Sep 17 00:00:00 2001 From: Juha Yrjola Date: Wed, 6 Dec 2006 17:13:49 -0800 Subject: [PATCH 2/18] ARM: OMAP: Add function to print clock usecounts Useful for debugging power management code. Signed-off-by: Juha Yrjola Signed-off-by: Tony Lindgren --- arch/arm/plat-omap/clock.c | 35 +++++++++++++++++++++++++++++++++++ 1 files changed, 35 insertions(+), 0 deletions(-) --- a/arch/arm/plat-omap/clock.c +++ b/arch/arm/plat-omap/clock.c @@ -33,6 +33,41 @@ static DEFINE_SPINLOCK(clockfw_lock); static struct clk_functions *arch_clock; +#ifdef CONFIG_PM_DEBUG + +static void print_parents(struct clk *clk) +{ + struct clk *p; + int printed = 0; + + list_for_each_entry(p, &clocks, node) { + if (p->parent == clk && p->usecount) { + if (!clk->usecount && !printed) { + printk("MISMATCH: %s\n", clk->name); + printed = 1; + } + printk("\t%-15s\n", p->name); + } + } +} + +void clk_print_usecounts(void) +{ + unsigned long flags; + struct clk *p; + + spin_lock_irqsave(&clockfw_lock, flags); + list_for_each_entry(p, &clocks, node) { + if (p->usecount) + printk("%-15s: %d\n", p->name, p->usecount); + print_parents(p); + + } + spin_unlock_irqrestore(&clockfw_lock, flags); +} + +#endif + /*------------------------------------------------------------------------- * Standard clock functions defined in include/linux/clk.h *-------------------------------------------------------------------------*/ -- 1.4.4.2