linux-kernel - [PATCH 2/18] ARM: OMAP: Add function to print clock usecounts

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Message-Id: <11761537491968-git-send-email-tony@atomide.com>
Date:	Mon,  9 Apr 2007 17:22:07 -0400
From:	Tony Lindgren <tony@...mide.com>
To:	linux-kernel@...r.kernel.org
Cc:	Juha Yrjola <juha.yrjola@...idboot.com>,
	Tony Lindgren <tony@...mide.com>
Subject: [PATCH 2/18] ARM: OMAP: Add function to print clock usecounts

From: Juha Yrjola <juha.yrjola@...idboot.com>

Useful for debugging power management code.

Signed-off-by: Juha Yrjola <juha.yrjola@...idboot.com>
Signed-off-by: Tony Lindgren <tony@...mide.com>
---
 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

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