diff options
Diffstat (limited to 'chip/npcx/system.c')
| -rw-r--r-- | chip/npcx/system.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/chip/npcx/system.c b/chip/npcx/system.c index da688c2c42..3f6f5d9ccd 100644 --- a/chip/npcx/system.c +++ b/chip/npcx/system.c @@ -45,6 +45,11 @@ #define CPRINTS(format, args...) cprints(CC_SYSTEM, format, ## args) #define CPRINTF(format, args...) cprintf(CC_SYSTEM, format, ## args) +#if defined(NPCX_LCT_SUPPORT) +/* A flag for waking up from hibernate mode by RTC overflow event */ +static int is_rtc_overflow_event; +#endif + /*****************************************************************************/ /* Internal functions */ @@ -328,6 +333,15 @@ static void chip_set_hib_flag(uint32_t *flags, uint32_t hib_wake_flags) if (npcx_lct_is_event_set()) { *flags |= EC_RESET_FLAG_RTC_ALARM | EC_RESET_FLAG_HIBERNATE; + /* Is RTC overflow event? */ + if (bbram_data_read(BBRM_DATA_INDEX_LCT_TIME) == + NPCX_LCT_MAX) { + /* + * Mark it as RTC overflow event and handle it + * in hook init function later for logging info. + */ + is_rtc_overflow_event = 1; + } npcx_lct_clear_event(); return; } @@ -1134,6 +1148,23 @@ int system_is_reboot_warm(void) return 1; } +#if defined(CONFIG_HIBERNATE_PSL) && defined(NPCX_LCT_SUPPORT) +static void system_init_check_rtc_wakeup_event(void) +{ + /* + * If platform uses PSL (Power Switch Logic) for hibernating and RTC is + * also supported, determine whether ec is woken up by RTC with overflow + * event (16 weeks). If so, let it go to hibernate mode immediately. + */ + if (is_rtc_overflow_event){ + CPRINTS("Hibernate due to RTC overflow event"); + system_hibernate(0, 0); + } +} +DECLARE_HOOK(HOOK_INIT, system_init_check_rtc_wakeup_event, + HOOK_PRIO_DEFAULT - 1); +#endif + /*****************************************************************************/ /* Console commands */ void print_system_rtc(enum console_channel ch) |