omap: timer: Set dmtimer used as clocksource in autoreload mode
Hemant Pedanekar [Wed, 10 Aug 2011 13:19:35 +0000 (13:19 +0000)]
If CONFIG_OMAP_32K_TIMER is not selected and dmtimer is used as clocksource, the
timer stops counting once overflow occurs as it was not set in autoreload mode.
This results into timekeeping failure: for example, 'sleep 1' at the shell after
the timer counter overflow would hang.

This patch sets up autoreload when starting the clocksource timer which fixes
the above issue.

Signed-off-by: Hemant Pedanekar <hemantp@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/timer.c

index e964072..cf1de7d 100644 (file)
@@ -293,7 +293,8 @@ static void __init omap2_gp_clocksource_init(int gptimer_id,
        pr_info("OMAP clocksource: GPTIMER%d at %lu Hz\n",
                gptimer_id, clksrc.rate);
 
-       __omap_dm_timer_load_start(clksrc.io_base, OMAP_TIMER_CTRL_ST, 0, 1);
+       __omap_dm_timer_load_start(clksrc.io_base,
+                       OMAP_TIMER_CTRL_ST | OMAP_TIMER_CTRL_AR, 0, 1);
        init_sched_clock(&cd, dmtimer_update_sched_clock, 32, clksrc.rate);
 
        if (clocksource_register_hz(&clocksource_gpt, clksrc.rate))