#include <linux/suspend.h>
#include <linux/syscore_ops.h>
#include <linux/ftrace.h>
+#include <linux/rtc.h>
#include <trace/events/power.h>
#include "power.h"
-const char *const pm_states[PM_SUSPEND_MAX] = {
- [PM_SUSPEND_FREEZE] = "freeze",
- [PM_SUSPEND_STANDBY] = "standby",
- [PM_SUSPEND_MEM] = "mem",
+struct pm_sleep_state pm_states[PM_SUSPEND_MAX] = {
+#ifdef CONFIG_EARLYSUSPEND
+ [PM_SUSPEND_ON] = { .label = "on", },
+#endif
+ [PM_SUSPEND_FREEZE] = { .label = "freeze", .state = PM_SUSPEND_FREEZE },
+ [PM_SUSPEND_STANDBY] = { .label = "standby", },
+ [PM_SUSPEND_MEM] = { .label = "mem", },
};
static const struct platform_suspend_ops *suspend_ops;
}
EXPORT_SYMBOL_GPL(freeze_wake);
+static bool valid_state(suspend_state_t state)
+{
+ /*
+ * PM_SUSPEND_STANDBY and PM_SUSPEND_MEM states need low level
+ * support and need to be valid to the low level
+ * implementation, no valid callback implies that none are valid.
+ */
+ return suspend_ops && suspend_ops->valid && suspend_ops->valid(state);
+}
+
/**
* suspend_set_ops - Set the global suspend method table.
* @ops: Suspend operations to use.
*/
void suspend_set_ops(const struct platform_suspend_ops *ops)
{
+ suspend_state_t i;
+
lock_system_sleep();
+
suspend_ops = ops;
+ for (i = PM_SUSPEND_STANDBY; i <= PM_SUSPEND_MEM; i++)
+ pm_states[i].state = valid_state(i) ? i : 0;
+
unlock_system_sleep();
}
EXPORT_SYMBOL_GPL(suspend_set_ops);
-bool valid_state(suspend_state_t state)
-{
- if (state == PM_SUSPEND_FREEZE) {
-#ifdef CONFIG_PM_DEBUG
- if (pm_test_level != TEST_NONE &&
- pm_test_level != TEST_FREEZER &&
- pm_test_level != TEST_DEVICES &&
- pm_test_level != TEST_PLATFORM) {
- printk(KERN_WARNING "Unsupported pm_test mode for "
- "freeze state, please choose "
- "none/freezer/devices/platform.\n");
- return false;
- }
-#endif
- return true;
- }
- /*
- * PM_SUSPEND_STANDBY and PM_SUSPEND_MEMORY states need lowlevel
- * support and need to be valid to the lowlevel
- * implementation, no valid callback implies that none are valid.
- */
- return suspend_ops && suspend_ops->valid && suspend_ops->valid(state);
-}
-
/**
* suspend_valid_only_mem - Generic memory-only valid callback.
*
if (need_suspend_ops(state) && !suspend_ops)
return -ENOSYS;
+#ifdef CONFIG_TOI
+ drop_pagecache();
+#endif
+
trace_machine_suspend(state);
if (need_suspend_ops(state) && suspend_ops->begin) {
error = suspend_ops->begin(state);
suspend_ops->recover();
goto Resume_devices;
}
+EXPORT_SYMBOL_GPL(suspend_devices_and_enter);
/**
* suspend_finish - Clean up before finishing the suspend sequence.
* Fail if that's not the case. Otherwise, prepare for system suspend, make the
* system enter the given sleep state and clean up after wakeup.
*/
-static int enter_state(suspend_state_t state)
+//<20130327> <marc.huang> merge from android kernel 3.0 - modify enter_state function to non-static
+int enter_state(suspend_state_t state)
{
int error;
- if (!valid_state(state))
- return -ENODEV;
-
+ if (state == PM_SUSPEND_FREEZE) {
+#ifdef CONFIG_PM_DEBUG
+ if (pm_test_level != TEST_NONE && pm_test_level <= TEST_CPUS) {
+ pr_warning("PM: Unsupported test mode for freeze state,"
+ "please choose none/freezer/devices/platform.\n");
+ return -EAGAIN;
+ }
+#endif
+ } else if (!valid_state(state)) {
+ return -EINVAL;
+ }
if (!mutex_trylock(&pm_mutex))
return -EBUSY;
freeze_begin();
printk(KERN_INFO "PM: Syncing filesystems ... ");
+ #if 1
sys_sync();
+ #else /* sys_sync WQ ver2.0 use */
+ //[MTK]
+ suspend_syssync_enqueue();
+ suspend_check_sys_sync_done();
+ #endif
printk("done.\n");
- pr_debug("PM: Preparing system for %s sleep\n", pm_states[state]);
+ pr_debug("PM: Preparing system for %s sleep\n", pm_states[state].label);
error = suspend_prepare(state);
if (error)
goto Unlock;
if (suspend_test(TEST_FREEZER))
goto Finish;
- pr_debug("PM: Entering %s sleep\n", pm_states[state]);
+ pr_debug("PM: Entering %s sleep\n", pm_states[state].label);
pm_restrict_gfp_mask();
error = suspend_devices_and_enter(state);
pm_restore_gfp_mask();
return error;
}
+static void pm_suspend_marker(char *annotation)
+{
+ struct timespec ts;
+ struct rtc_time tm;
+
+ getnstimeofday(&ts);
+ rtc_time_to_tm(ts.tv_sec, &tm);
+ pr_info("PM: suspend %s %d-%02d-%02d %02d:%02d:%02d.%09lu UTC\n",
+ annotation, tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
+ tm.tm_hour, tm.tm_min, tm.tm_sec, ts.tv_nsec);
+}
+
/**
* pm_suspend - Externally visible function for suspending the system.
* @state: System sleep state to enter.
if (state <= PM_SUSPEND_ON || state >= PM_SUSPEND_MAX)
return -EINVAL;
+ pm_suspend_marker("entry");
error = enter_state(state);
if (error) {
suspend_stats.fail++;
} else {
suspend_stats.success++;
}
+ pm_suspend_marker("exit");
return error;
}
EXPORT_SYMBOL(pm_suspend);
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blobdiff