diff options
Diffstat (limited to 'arch/arm/mach-omap2/pm34xx.c')
| -rw-r--r-- | arch/arm/mach-omap2/pm34xx.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c index ade2e4a6bb7d..ff818aaec6c5 100644 --- a/arch/arm/mach-omap2/pm34xx.c +++ b/arch/arm/mach-omap2/pm34xx.c @@ -36,6 +36,7 @@ #include <plat/prcm.h> #include <plat/gpmc.h> #include <plat/dma.h> +#include <plat/dmtimer.h> #include <asm/tlbflush.h> @@ -60,6 +61,7 @@ u32 enable_off_mode; u32 sleep_while_idle; +u32 wakeup_timer_seconds; struct power_state { struct powerdomain *pwrdm; @@ -535,6 +537,22 @@ out: #ifdef CONFIG_SUSPEND static suspend_state_t suspend_state; +static void omap2_pm_wakeup_on_timer(u32 seconds) +{ + u32 tick_rate, cycles; + + if (!seconds) + return; + + tick_rate = clk_get_rate(omap_dm_timer_get_fclk(gptimer_wakeup)); + cycles = tick_rate * seconds; + omap_dm_timer_stop(gptimer_wakeup); + omap_dm_timer_set_load_start(gptimer_wakeup, 0, 0xffffffff - cycles); + + pr_info("PM: Resume timer in %d secs (%d ticks at %d ticks/sec.)\n", + seconds, cycles, tick_rate); +} + static int omap3_pm_prepare(void) { disable_hlt(); @@ -546,6 +564,9 @@ static int omap3_pm_suspend(void) struct power_state *pwrst; int state, ret = 0; + if (wakeup_timer_seconds) + omap2_pm_wakeup_on_timer(wakeup_timer_seconds); + /* Read current next_pwrsts */ list_for_each_entry(pwrst, &pwrst_list, node) pwrst->saved_state = pwrdm_read_next_pwrst(pwrst->pwrdm); |