* Hemant Pedanekar <hemantp@xxxxxx> [110809 20:46]:
> 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@xxxxxx>
> ---
> arch/arm/mach-omap2/timer.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
> index e964072..796b935 100644
> --- a/arch/arm/mach-omap2/timer.c
> +++ b/arch/arm/mach-omap2/timer.c
> @@ -293,7 +293,7 @@ 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_set_load_start(&clksrc, 1, 0);
> init_sched_clock(&cd, dmtimer_update_sched_clock, 32, clksrc.rate);
>
> if (clocksource_register_hz(&clocksource_gpt, clksrc.rate))
You should be able to just set the autoreload mode by changing to use
OMAP_TIMER_CTRL_POSTED | OMAP_TIMER_CTRL_AR in the __omap_dm_timer_load_start
above.
This avoids calling something that might be a loadable module eventually.
Regards,
Tony
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