diff options
| -rw-r--r-- | arch/arm/mach-omap2/pm-debug.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/pm.h | 3 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/pm34xx.c | 21 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/timer-gp.c | 2 |
4 files changed, 28 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c index 1725da3f4e18..8baa30d2acfb 100644 --- a/arch/arm/mach-omap2/pm-debug.c +++ b/arch/arm/mach-omap2/pm-debug.c @@ -596,6 +596,8 @@ static int __init pm_dbg_init(void) &enable_off_mode, &pm_dbg_option_fops); (void) debugfs_create_file("sleep_while_idle", S_IRUGO | S_IWUGO, d, &sleep_while_idle, &pm_dbg_option_fops); + (void) debugfs_create_file("wakeup_timer_seconds", S_IRUGO | S_IWUGO, d, + &wakeup_timer_seconds, &pm_dbg_option_fops); pm_dbg_init_done = 1; return 0; diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h index 9582793ce82d..7eb769f4ef30 100644 --- a/arch/arm/mach-omap2/pm.h +++ b/arch/arm/mach-omap2/pm.h @@ -22,6 +22,9 @@ extern void omap3_pm_off_mode_enable(int); extern int omap3_pm_get_suspend_state(struct powerdomain *pwrdm); extern int omap3_pm_set_suspend_state(struct powerdomain *pwrdm, int state); +extern u32 wakeup_timer_seconds; +extern struct omap_dm_timer *gptimer_wakeup; + #ifdef CONFIG_PM_DEBUG extern void omap2_pm_dump(int mode, int resume, unsigned int us); extern int omap2_pm_debug; 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); diff --git a/arch/arm/mach-omap2/timer-gp.c b/arch/arm/mach-omap2/timer-gp.c index df2b7094de98..cd04deaa88c5 100644 --- a/arch/arm/mach-omap2/timer-gp.c +++ b/arch/arm/mach-omap2/timer-gp.c @@ -47,6 +47,7 @@ static struct omap_dm_timer *gptimer; static struct clock_event_device clockevent_gpt; static u8 __initdata gptimer_id = 1; static u8 __initdata inited; +struct omap_dm_timer *gptimer_wakeup; static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id) { @@ -134,6 +135,7 @@ static void __init omap2_gp_clockevent_init(void) gptimer = omap_dm_timer_request_specific(gptimer_id); BUG_ON(gptimer == NULL); + gptimer_wakeup = gptimer; #if defined(CONFIG_OMAP_32K_TIMER) src = OMAP_TIMER_SRC_32_KHZ; |
