From 503923eeecb93ff69ee940549f314e0fe3a68429 Mon Sep 17 00:00:00 2001 From: Kevin Hilman Date: Fri, 8 Oct 2010 10:23:32 -0700 Subject: [PATCH] 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 Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/pm24xx.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/mach-omap2/pm24xx.c b/arch/arm/mach-omap2/pm24xx.c index 6aeedeacdad..f5c7ef95594 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()) -- 2.20.1