Merge pull request #8219 from jeromecoutant/PR_EMAC_SLEEP

STM32 EMAC : lock deep sleep

features/netsocket/emac-drivers/TARGET_STM_EMAC/stm32xx_emac.cpp

@@ -2,6 +2,7 @@
 
 #include "cmsis_os.h"
 
+#include "mbed.h"
 #include "mbed_interface.h"
 #include "mbed_assert.h"
 #include "mbed_shared_queues.h"
@@ -474,6 +475,8 @@ void mbed_default_mac_address(char *mac)
 
 bool STM32_EMAC::power_up()
 {
+    sleep_manager_lock_deep_sleep();
+
     /* Initialize the hardware */
     if (!low_level_init_successful()) {
         return false;
@@ -556,6 +559,7 @@ void STM32_EMAC::set_all_multicast(bool all)
 void STM32_EMAC::power_down()
 {
     /* No-op at this stage */
+    sleep_manager_unlock_deep_sleep();
 }
 
 void STM32_EMAC::set_memory_manager(EMACMemoryManager &mem_mngr)