From: Kevin Hilman <khilman@deeprootsystems.com>
Date: Fri, 8 Oct 2010 17:23:32 +0000 (-0700)
Subject: OMAP2: PM: check UART status before trying to idle
X-Git-Tag: MMI-PSA29.97-13-9~21968^2~14
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=503923eeecb93ff69ee940549f314e0fe3a68429;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git

OMAP2: PM: check UART status before trying to idle

As is done on OMAP3, check omap_uart_can_sleep() as one of the
pre-conditions for entering the idle loop.  Without this check,
entering idle introduces large latencies on active UARTs, and is
especially noticable on serial console.

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---

diff --git a/arch/arm/mach-omap2/pm24xx.c b/arch/arm/mach-omap2/pm24xx.c
index 6aeedeacdad8..f5c7ef955942 100644
--- a/arch/arm/mach-omap2/pm24xx.c
+++ b/arch/arm/mach-omap2/pm24xx.c
@@ -245,6 +245,8 @@ static int omap2_can_sleep(void)
 {
 	if (omap2_fclks_active())
 		return 0;
+	if (!omap_uart_can_sleep())
+		return 0;
 	if (osc_ck->usecount > 1)
 		return 0;
 	if (omap_dma_running())