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fix(esp_hw_support): restore brownout after deep sleep rejection on ESP32-S2

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ESP32-S2 disables the brownout detector before deep sleep; if sleep is
rejected, re-init it so BOD is not left disabled (PM-519).

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
wuzhenghui
2026-09-09 17:11:11 +08:00
co-authored by Cursor
parent c8cf7e34c1
commit 7fda2351ef
1 changed files with 8 additions and 3 deletions
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components/esp_hw_support/sleep_modes.c
+8 -3
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@@ -1222,12 +1222,11 @@ static esp_err_t FORCE_IRAM_ATTR deep_sleep_start(bool allow_sleep_rejection)
}
}
#endif
#if CONFIG_IDF_TARGET_ESP32S2
#if CONFIG_IDF_TARGET_ESP32S2 && CONFIG_ESP_BROWNOUT_DET
/* 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
#endif //CONFIG_IDF_TARGET_ESP32S2 && CONFIG_ESP_BROWNOUT_DET && CONFIG_ESP_BROWNOUT_DET
esp_sync_timekeeping_timers();
@@ -1323,6 +1322,12 @@ static esp_err_t FORCE_IRAM_ATTR deep_sleep_start(bool allow_sleep_rejection)
esp_clk_private_unlock();
#endif
portEXIT_CRITICAL(&s_config.lock);
#if CONFIG_IDF_TARGET_ESP32S2 && CONFIG_ESP_BROWNOUT_DET
/* Brownout was disabled before attempting deep sleep; restore it after rejection. */
esp_brownout_init();
#endif //CONFIG_IDF_TARGET_ESP32S2 && CONFIG_ESP_BROWNOUT_DET
return err;
}