diff options
Diffstat (limited to 'chip')
| -rw-r--r-- | chip/npcx/system.c | 43 |
1 files changed, 41 insertions, 2 deletions
diff --git a/chip/npcx/system.c b/chip/npcx/system.c index 13695acf73..f014acb455 100644 --- a/chip/npcx/system.c +++ b/chip/npcx/system.c @@ -412,13 +412,20 @@ static char system_to_hex(uint8_t x) /*****************************************************************************/ /* IC specific low-level driver */ -/* Microsecond will be ignore for hardware limitation */ +/* + * Microseconds will be ignored. The WTC register only + * stores wakeup time in seconds. + * Set seconds = 0 to disable the alarm + */ +#define EC_RTC_ALARM_CLEAR 0 void system_set_rtc_alarm(uint32_t seconds, uint32_t microseconds) { uint32_t cur_secs, alarm_secs; - if (seconds == 0) + if (seconds == EC_RTC_ALARM_CLEAR) { + system_reset_rtc_alarm(); return; + } /* Get current clock */ cur_secs = NPCX_TTC; @@ -458,6 +465,25 @@ void system_reset_rtc_alarm(void) task_disable_irq(NPCX_IRQ_MTC_WKINTAD_0); } +/* + * Return the seconds remaining before the RTC alarm goes off. + * Returns 0 if alarm is not set. + */ +uint32_t system_get_rtc_alarm(void) +{ + /* + * Return 0: + * 1. If alarm is not set to go off, OR + * 2. If alarm is set and has already gone off + */ + if (!IS_BIT_SET(NPCX_WTC, NPCX_WTC_WIE) || + IS_BIT_SET(NPCX_WTC, NPCX_WTC_PTO)) { + return 0; + } + /* Get seconds before alarm goes off */ + return (NPCX_WTC - NPCX_TTC) & MTC_ALARM_MASK; +} + /** * Enable hibernate interrupt */ @@ -780,6 +806,19 @@ DECLARE_HOST_COMMAND(EC_CMD_RTC_SET_ALARM, system_rtc_set_alarm, EC_VER_MASK(0)); +static int system_rtc_get_alarm(struct host_cmd_handler_args *args) +{ + struct ec_response_rtc *r = args->response; + + r->time = system_get_rtc_alarm(); + args->response_size = sizeof(*r); + + return EC_RES_SUCCESS; +} +DECLARE_HOST_COMMAND(EC_CMD_RTC_GET_ALARM, + system_rtc_get_alarm, + EC_VER_MASK(0)); + #ifdef CONFIG_EXTERNAL_STORAGE void system_jump_to_booter(void) { |