[70/86,ARM] OMAP3: PM: Make sure clk_disable_unused() order is correct

Commit Message

Kevin Hilman March 12, 2009, 6:28 p.m. UTC

From: Tero Kristo <[e-mail]>

Current implementation will disable clocks in the order defined in clock34xx.h,
at least DPLL4_M2X2 will hang in certain cases (and prevent retention / off)
if clocks are not disabled in correct order. This patch makes sure the parent
clocks will be active when disabling a clock.

linux-omap source commit is 672680063420ef8c8c4e7271984bb9cc08171d29.

Signed-off-by: Tero Kristo <[e-mail]>
Signed-off-by: Kevin Hilman <[e-mail]>
Signed-off-by: Russell King <[e-mail]>
---
 arch/arm/mach-omap2/clock.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

Patch

diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c
index 18fddb6..478ca66 100644
--- a/arch/arm/mach-omap2/clock.c
+++ b/arch/arm/mach-omap2/clock.c
@@ -1000,6 +1000,10 @@  void omap2_clk_disable_unused(struct clk *clk)
 		return;
 
 	printk(KERN_INFO "Disabling unused clock \"%s\"\n", clk->name);
-	_omap2_clk_disable(clk);
+	if (cpu_is_omap34xx()) {
+		omap2_clk_enable(clk);
+		omap2_clk_disable(clk);
+	} else
+		_omap2_clk_disable(clk);
 }
 #endif