diff --git a/ports/atmel-samd/common-hal/microcontroller/__init__.c b/ports/atmel-samd/common-hal/microcontroller/__init__.c
index 50a1ec038e..b3ff06b62f 100644
--- a/ports/atmel-samd/common-hal/microcontroller/__init__.c
+++ b/ports/atmel-samd/common-hal/microcontroller/__init__.c
@@ -84,6 +84,10 @@ void common_hal_mcu_reset(void) {
     reset();
 }
 
+void common_hal_mcu_sleep(void) {
+    //deep sleep call here
+}
+
 // The singleton microcontroller.Processor object, bound to microcontroller.cpu
 // It currently only has properties, and no state.
 const mcu_processor_obj_t common_hal_mcu_processor_obj = {
diff --git a/ports/cxd56/common-hal/microcontroller/__init__.c b/ports/cxd56/common-hal/microcontroller/__init__.c
index 7aa3b839d7..4379f9be66 100644
--- a/ports/cxd56/common-hal/microcontroller/__init__.c
+++ b/ports/cxd56/common-hal/microcontroller/__init__.c
@@ -81,6 +81,10 @@ void common_hal_mcu_reset(void) {
     boardctl(BOARDIOC_RESET, 0);
 }
 
+void common_hal_mcu_sleep(void) {
+    //deep sleep call here
+}
+
 STATIC const mp_rom_map_elem_t mcu_pin_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_UART2_RXD), MP_ROM_PTR(&pin_UART2_RXD) },
     { MP_ROM_QSTR(MP_QSTR_UART2_TXD), MP_ROM_PTR(&pin_UART2_TXD) },
diff --git a/ports/litex/common-hal/microcontroller/__init__.c b/ports/litex/common-hal/microcontroller/__init__.c
index 3c91661144..3b1628c39a 100644
--- a/ports/litex/common-hal/microcontroller/__init__.c
+++ b/ports/litex/common-hal/microcontroller/__init__.c
@@ -89,6 +89,10 @@ void common_hal_mcu_reset(void) {
     while(1);
 }
 
+void common_hal_mcu_sleep(void) {
+    //deep sleep call here
+}
+
 // The singleton microcontroller.Processor object, bound to microcontroller.cpu
 // It currently only has properties, and no state.
 const mcu_processor_obj_t common_hal_mcu_processor_obj = {
diff --git a/ports/mimxrt10xx/common-hal/microcontroller/__init__.c b/ports/mimxrt10xx/common-hal/microcontroller/__init__.c
index 6a8537e2da..c7bc7eb9e8 100644
--- a/ports/mimxrt10xx/common-hal/microcontroller/__init__.c
+++ b/ports/mimxrt10xx/common-hal/microcontroller/__init__.c
@@ -86,6 +86,10 @@ void common_hal_mcu_reset(void) {
     NVIC_SystemReset();
 }
 
+void common_hal_mcu_sleep(void) {
+    //deep sleep call here
+}
+
 // The singleton microcontroller.Processor object, bound to microcontroller.cpu
 // It currently only has properties, and no state.
 const mcu_processor_obj_t common_hal_mcu_processor_obj = {
diff --git a/ports/nrf/common-hal/microcontroller/__init__.c b/ports/nrf/common-hal/microcontroller/__init__.c
index 06aac9409d..ff6c658b8b 100644
--- a/ports/nrf/common-hal/microcontroller/__init__.c
+++ b/ports/nrf/common-hal/microcontroller/__init__.c
@@ -95,6 +95,10 @@ void common_hal_mcu_reset(void) {
     reset_cpu();
 }
 
+void common_hal_mcu_sleep(void) {
+    //deep sleep call here
+}
+
 // The singleton microcontroller.Processor object, bound to microcontroller.cpu
 // It currently only has properties, and no state.
 const mcu_processor_obj_t common_hal_mcu_processor_obj = {
diff --git a/ports/stm/common-hal/microcontroller/__init__.c b/ports/stm/common-hal/microcontroller/__init__.c
index a827399ccb..2a60c53426 100644
--- a/ports/stm/common-hal/microcontroller/__init__.c
+++ b/ports/stm/common-hal/microcontroller/__init__.c
@@ -81,6 +81,10 @@ void common_hal_mcu_reset(void) {
     NVIC_SystemReset();
 }
 
+void common_hal_mcu_sleep(void) {
+    //deep sleep call here
+}
+
 // The singleton microcontroller.Processor object, bound to microcontroller.cpu
 // It currently only has properties, and no state.
 const mcu_processor_obj_t common_hal_mcu_processor_obj = {
diff --git a/shared-bindings/alarm/__init__.c b/shared-bindings/alarm/__init__.c
index 37462d88cc..88c4bc8878 100644
--- a/shared-bindings/alarm/__init__.c
+++ b/shared-bindings/alarm/__init__.c
@@ -1,5 +1,9 @@
 #include "shared-bindings/alarm/__init__.h"
 
+//| """alarm module
+//|
+//| The `alarm` module implements deep sleep."""
+
 STATIC mp_obj_t alarm_get_wake_alarm(void) {
     return common_hal_alarm_get_wake_alarm();
 }
diff --git a/shared-bindings/alarm_io/__init__.c b/shared-bindings/alarm_io/__init__.c
index dbe4671763..4e42f9a2e1 100644
--- a/shared-bindings/alarm_io/__init__.c
+++ b/shared-bindings/alarm_io/__init__.c
@@ -3,6 +3,10 @@
 #include "shared-bindings/alarm_io/__init__.h"
 #include "shared-bindings/microcontroller/Pin.h"
 
+//| """alarm_io module
+//|
+//| The `alarm_io` module implements deep sleep."""
+
 STATIC mp_obj_t alarm_io_pin_state(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
     enum { ARG_level, ARG_pull };
     static const mp_arg_t allowed_args[] = {
diff --git a/shared-bindings/alarm_time/__init__.c b/shared-bindings/alarm_time/__init__.c
index 218ac68575..1707f7488f 100644
--- a/shared-bindings/alarm_time/__init__.c
+++ b/shared-bindings/alarm_time/__init__.c
@@ -1,6 +1,10 @@
 #include "py/obj.h"
 #include "shared-bindings/alarm_time/__init__.h"
 
+//| """alarm_time module
+//|
+//| The `alarm_time` module implements deep sleep."""
+
 STATIC mp_obj_t alarm_time_duration(mp_obj_t seconds_o) {
     #if MICROPY_PY_BUILTINS_FLOAT
     mp_float_t seconds = mp_obj_get_float(seconds_o);
diff --git a/shared-bindings/alarm_touch/__init__.c b/shared-bindings/alarm_touch/__init__.c
index e36fa73cb8..5f5a156d80 100644
--- a/shared-bindings/alarm_touch/__init__.c
+++ b/shared-bindings/alarm_touch/__init__.c
@@ -1,6 +1,10 @@
 #include "py/obj.h"
 #include "shared-bindings/alarm_touch/__init__.h"
 
+//| """alarm_touch module
+//|
+//| The `alarm_touch` module implements deep sleep."""
+
 STATIC mp_obj_t alarm_touch_disable(void) {
     common_hal_alarm_touch_disable();
     return mp_const_none;