From: Colin Cross <ccross@android.com>
Date: Thu, 21 Oct 2010 00:47:18 +0000 (-0700)
Subject: [ARM] tegra: Disable clocks left on by bootloader
X-Git-Tag: firefly_0821_release~9833^2~142^2~22
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7ef0c96152dd4e93dbe8bcd5a4d65a53332ac51f;p=firefly-linux-kernel-4.4.55.git

[ARM] tegra: Disable clocks left on by bootloader

Change-Id: I6651ab59b738787ec94f358d5789d950c3d1a563
Signed-off-by: Colin Cross <ccross@android.com>
---

diff --git a/arch/arm/mach-tegra/clock.c b/arch/arm/mach-tegra/clock.c
index 8625b013742b..008614d44e97 100644
--- a/arch/arm/mach-tegra/clock.c
+++ b/arch/arm/mach-tegra/clock.c
@@ -511,6 +511,30 @@ int __init tegra_init_dvfs(void)
 
 late_initcall(tegra_init_dvfs);
 
+int __init tegra_disable_boot_clocks(void)
+{
+	unsigned long flags;
+
+	struct clk *c;
+
+	spin_lock_irqsave(&clock_lock, flags);
+
+	list_for_each_entry(c, &clocks, node) {
+		if (c->refcnt == 0 && c->state == ON &&
+				c->ops && c->ops->disable) {
+			pr_warning("Disabling clock %s left on by bootloader\n",
+				c->name);
+			c->ops->disable(c);
+			c->state = OFF;
+		}
+	}
+
+	spin_unlock_irqrestore(&clock_lock, flags);
+
+	return 0;
+}
+late_initcall(tegra_disable_boot_clocks);
+
 #ifdef CONFIG_DEBUG_FS
 static struct dentry *clk_debugfs_root;