Import of the watch repository from Pebble

src/fw/drivers/stm32f2/pwr.c

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "drivers/pwr.h"
+
+#include "drivers/periph_config.h"
+
+#define STM32F2_COMPATIBLE
+#include <mcu.h>
+
+void pwr_enable_wakeup(bool enable) {
+  PWR_WakeUpPinCmd(enable ? ENABLE : DISABLE);
+}
+
+void pwr_flash_power_down_stop_mode(bool power_down) {
+  PWR_FlashPowerDownCmd(power_down ? ENABLE : DISABLE);
+}
+
+void pwr_access_backup_domain(bool enable_access) {
+  periph_config_enable(PWR, RCC_APB1Periph_PWR);
+  PWR_BackupAccessCmd(enable_access ? ENABLE : DISABLE);
+  periph_config_disable(PWR, RCC_APB1Periph_PWR);
+}