Merge branch 'bugfix/deepsleep_disable_brownout_s2_v4.3' into 'release/v4.3'

deep_sleep: on S2 disable the brown out detector before deep sleeping (v4.3)

See merge request espressif/esp-idf!12499

components/esp32/include/esp32/brownout.h

@@ -16,6 +16,16 @@
 #ifndef __ESP_BROWNOUT_H
 #define __ESP_BROWNOUT_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 void esp_brownout_init(void);
 
+void esp_brownout_disable(void);
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif

components/esp32c3/include/esp32c3/brownout.h

@@ -1,4 +1,4 @@
-// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
+// Copyright 2015-2021 Espressif Systems (Shanghai) PTE LTD
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -16,6 +16,16 @@
 #ifndef __ESP_BROWNOUT_H
 #define __ESP_BROWNOUT_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 void esp_brownout_init(void);
 
+void esp_brownout_disable(void);
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif

components/esp32s2/include/esp32s2/brownout.h

@@ -1,4 +1,4 @@
-// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+// Copyright 2015-2021 Espressif Systems (Shanghai) PTE LTD
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -22,6 +22,8 @@ extern "C" {
 
 void esp_brownout_init(void);
 
+void esp_brownout_disable(void);
+
 #ifdef __cplusplus
 }
 #endif

components/esp32s3/include/esp32s3/brownout.h

@@ -16,6 +16,16 @@
 #ifndef __ESP_BROWNOUT_H
 #define __ESP_BROWNOUT_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 void esp_brownout_init(void);
 
+void esp_brownout_disable(void);
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif

components/esp_common/src/brownout.c

@@ -85,3 +85,18 @@ void esp_brownout_init(void)
     brownout_hal_intr_enable(true);
 #endif // not SOC_BROWNOUT_RESET_SUPPORTED
 }
+
+void esp_brownout_disable(void)
+{
+    brownout_hal_config_t cfg = {
+        .enabled = false,
+    };
+
+    brownout_hal_config(&cfg);
+
+#ifndef SOC_BROWNOUT_RESET_SUPPORTED
+    brownout_hal_intr_enable(false);
+
+    rtc_isr_deregister(rtc_brownout_isr_handler, NULL);
+#endif // not SOC_BROWNOUT_RESET_SUPPORTED
+}

components/esp_system/sleep_modes.c

@@ -58,6 +58,7 @@
 #include "esp32s2/clk.h"
 #include "esp32s2/rom/cache.h"
 #include "esp32s2/rom/rtc.h"
+#include "esp32s2/brownout.h"
 #include "soc/extmem_reg.h"
 #include "driver/gpio.h"
 #elif CONFIG_IDF_TARGET_ESP32S3
@@ -597,6 +598,12 @@ inline static uint32_t IRAM_ATTR call_rtc_sleep_start(uint32_t reject_triggers)
 
 void IRAM_ATTR esp_deep_sleep_start(void)
 {
+#if CONFIG_IDF_TARGET_ESP32S2
+    /* Due to hardware limitations, on S2 the brownout detector sometimes trigger during deep sleep
+       to circumvent this we disable the brownout detector before sleeping  */
+    esp_brownout_disable();
+#endif //CONFIG_IDF_TARGET_ESP32S2
+
     // record current RTC time
     s_config.rtc_ticks_at_sleep_start = rtc_time_get();