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 6aeedea..f5c7ef9 100644
--- a/arch/arm/mach-omap2/pm24xx.c
+++ b/arch/arm/mach-omap2/pm24xx.c
@@ -245,6 +245,8 @@
{
if (omap2_fclks_active())
return 0;
+ if (!omap_uart_can_sleep())
+ return 0;
if (osc_ck->usecount > 1)
return 0;
if (omap_dma_running())
