PM debug: allow configurable wakeup from suspend on OMAP GPtimer
Using debugfs, export a configurable wakeup timer to be used to wakeup system from suspend. If a non-zero value is written to /debug/pm_debug/wakeup_timer_seconds, A timer wakeup event will wake the system and resume after the configured number of seconds. Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>hifive-unleashed-5.1
parent
c40552bc82
commit
d7814e4df6
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@ -596,6 +596,8 @@ static int __init pm_dbg_init(void)
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&enable_off_mode, &pm_dbg_option_fops);
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&enable_off_mode, &pm_dbg_option_fops);
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(void) debugfs_create_file("sleep_while_idle", S_IRUGO | S_IWUGO, d,
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(void) debugfs_create_file("sleep_while_idle", S_IRUGO | S_IWUGO, d,
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&sleep_while_idle, &pm_dbg_option_fops);
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&sleep_while_idle, &pm_dbg_option_fops);
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(void) debugfs_create_file("wakeup_timer_seconds", S_IRUGO | S_IWUGO, d,
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&wakeup_timer_seconds, &pm_dbg_option_fops);
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pm_dbg_init_done = 1;
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pm_dbg_init_done = 1;
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return 0;
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return 0;
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@ -22,6 +22,9 @@ extern void omap3_pm_off_mode_enable(int);
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extern int omap3_pm_get_suspend_state(struct powerdomain *pwrdm);
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extern int omap3_pm_get_suspend_state(struct powerdomain *pwrdm);
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extern int omap3_pm_set_suspend_state(struct powerdomain *pwrdm, int state);
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extern int omap3_pm_set_suspend_state(struct powerdomain *pwrdm, int state);
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extern u32 wakeup_timer_seconds;
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extern struct omap_dm_timer *gptimer_wakeup;
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#ifdef CONFIG_PM_DEBUG
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#ifdef CONFIG_PM_DEBUG
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extern void omap2_pm_dump(int mode, int resume, unsigned int us);
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extern void omap2_pm_dump(int mode, int resume, unsigned int us);
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extern int omap2_pm_debug;
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extern int omap2_pm_debug;
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@ -36,6 +36,7 @@
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#include <plat/prcm.h>
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#include <plat/prcm.h>
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#include <plat/gpmc.h>
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#include <plat/gpmc.h>
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#include <plat/dma.h>
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#include <plat/dma.h>
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#include <plat/dmtimer.h>
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#include <asm/tlbflush.h>
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#include <asm/tlbflush.h>
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@ -60,6 +61,7 @@
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u32 enable_off_mode;
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u32 enable_off_mode;
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u32 sleep_while_idle;
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u32 sleep_while_idle;
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u32 wakeup_timer_seconds;
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struct power_state {
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struct power_state {
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struct powerdomain *pwrdm;
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struct powerdomain *pwrdm;
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@ -535,6 +537,22 @@ out:
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#ifdef CONFIG_SUSPEND
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#ifdef CONFIG_SUSPEND
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static suspend_state_t suspend_state;
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static suspend_state_t suspend_state;
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static void omap2_pm_wakeup_on_timer(u32 seconds)
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{
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u32 tick_rate, cycles;
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if (!seconds)
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return;
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tick_rate = clk_get_rate(omap_dm_timer_get_fclk(gptimer_wakeup));
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cycles = tick_rate * seconds;
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omap_dm_timer_stop(gptimer_wakeup);
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omap_dm_timer_set_load_start(gptimer_wakeup, 0, 0xffffffff - cycles);
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pr_info("PM: Resume timer in %d secs (%d ticks at %d ticks/sec.)\n",
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seconds, cycles, tick_rate);
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}
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static int omap3_pm_prepare(void)
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static int omap3_pm_prepare(void)
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{
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{
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disable_hlt();
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disable_hlt();
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@ -546,6 +564,9 @@ static int omap3_pm_suspend(void)
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struct power_state *pwrst;
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struct power_state *pwrst;
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int state, ret = 0;
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int state, ret = 0;
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if (wakeup_timer_seconds)
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omap2_pm_wakeup_on_timer(wakeup_timer_seconds);
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/* Read current next_pwrsts */
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/* Read current next_pwrsts */
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list_for_each_entry(pwrst, &pwrst_list, node)
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list_for_each_entry(pwrst, &pwrst_list, node)
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pwrst->saved_state = pwrdm_read_next_pwrst(pwrst->pwrdm);
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pwrst->saved_state = pwrdm_read_next_pwrst(pwrst->pwrdm);
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@ -47,6 +47,7 @@ static struct omap_dm_timer *gptimer;
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static struct clock_event_device clockevent_gpt;
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static struct clock_event_device clockevent_gpt;
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static u8 __initdata gptimer_id = 1;
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static u8 __initdata gptimer_id = 1;
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static u8 __initdata inited;
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static u8 __initdata inited;
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struct omap_dm_timer *gptimer_wakeup;
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static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id)
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static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id)
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{
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{
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@ -134,6 +135,7 @@ static void __init omap2_gp_clockevent_init(void)
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gptimer = omap_dm_timer_request_specific(gptimer_id);
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gptimer = omap_dm_timer_request_specific(gptimer_id);
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BUG_ON(gptimer == NULL);
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BUG_ON(gptimer == NULL);
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gptimer_wakeup = gptimer;
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#if defined(CONFIG_OMAP_32K_TIMER)
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#if defined(CONFIG_OMAP_32K_TIMER)
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src = OMAP_TIMER_SRC_32_KHZ;
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src = OMAP_TIMER_SRC_32_KHZ;
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