Merge pull request #7463 from RetiredWizard/teensyrtc

Use low power RTC on mimxrt10xx (Teensy41) boards

Author: tannewt

ports/mimxrt10xx/Makefile

@@ -109,6 +109,7 @@ SRC_SDK := \
 	drivers/fsl_ocotp.c \
 	drivers/fsl_pwm.c \
 	drivers/fsl_snvs_hp.c \
+	drivers/fsl_snvs_lp.c \
 	drivers/fsl_tempmon.c \
 	drivers/fsl_trng.c \
 	system_$(CHIP_FAMILY).c \

ports/mimxrt10xx/common-hal/rtc/RTC.c

@@ -36,18 +36,26 @@
 #include "supervisor/shared/translate/translate.h"
 
 #include "fsl_snvs_hp.h"
+#include "fsl_snvs_lp.h"
 
 void rtc_init(void) {
-    snvs_hp_rtc_config_t config;
-    SNVS_HP_RTC_GetDefaultConfig(&config);
+    snvs_hp_rtc_config_t hpconfig;
+    SNVS_HP_RTC_GetDefaultConfig(&hpconfig);
 
-    SNVS_HP_RTC_Init(SNVS, &config);
+    SNVS_HP_RTC_Init(SNVS, &hpconfig);
+
+    snvs_lp_srtc_config_t lpconfig;
+    SNVS_LP_SRTC_GetDefaultConfig(&lpconfig);
+
+    SNVS_LP_SRTC_Init(SNVS, &lpconfig);
+
+    SNVS_LP_SRTC_StartTimer(SNVS);
     SNVS_HP_RTC_StartTimer(SNVS);
 }
 
 void common_hal_rtc_get_time(timeutils_struct_time_t *tm) {
-    snvs_hp_rtc_datetime_t rtcDate;
-    SNVS_HP_RTC_GetDatetime(SNVS, &rtcDate);
+    snvs_lp_srtc_datetime_t rtcDate;
+    SNVS_LP_SRTC_GetDatetime(SNVS, &rtcDate);
 
     tm->tm_year = rtcDate.year;
     tm->tm_mon = rtcDate.month;
@@ -58,15 +66,15 @@ void common_hal_rtc_get_time(timeutils_struct_time_t *tm) {
 }
 
 void common_hal_rtc_set_time(timeutils_struct_time_t *tm) {
-    snvs_hp_rtc_datetime_t rtcDate;
+    snvs_lp_srtc_datetime_t rtcDate;
     rtcDate.year = tm->tm_year;
     rtcDate.month = tm->tm_mon;
     rtcDate.day = tm->tm_mday;
     rtcDate.hour = tm->tm_hour;
     rtcDate.minute = tm->tm_min;
     rtcDate.second = tm->tm_sec;
 
-    SNVS_HP_RTC_SetDatetime(SNVS, &rtcDate);
+    SNVS_LP_SRTC_SetDatetime(SNVS, &rtcDate);
 }
 
 int common_hal_rtc_get_calibration(void) {