dect
/
linux-2.6
Archived
13
0
Fork 0
Code Releases Activity

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>
This commit is contained in:
Kevin Hilman 2010-10-08 10:23:32 -07:00 committed by Tony Lindgren
parent cc7a1d2a54
commit 503923eeec
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/mach-omap2/pm24xx.c
View File

@ -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())