esp_hw_support/sleep: fix current leakage when hold digital io during deep sleep

components/esp_hw_support/include/esp_private/esp_sleep_internal.h

@@ -6,6 +6,7 @@
 
 #pragma once
 #include <stdbool.h>
+#include "sdkconfig.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -20,6 +21,15 @@ extern "C" {
  */
 void esp_sleep_enable_adc_tsens_monitor(bool enable);
 
+// TODO: IDF-6051, IDF-6052
+#if !CONFIG_IDF_TARGET_ESP32H2 && !CONFIG_IDF_TARGET_ESP32C6
+/**
+ * @brief Isolate all digital IOs except those that are held during deep sleep
+ *
+ * Reduce digital IOs current leakage during deep sleep.
+ */
+void esp_sleep_isolate_digital_gpio(void);
+#endif
 
 #ifdef __cplusplus
 }

components/esp_hw_support/sleep_gpio.c

@@ -12,11 +12,13 @@
 #include "esp_attr.h"
 #include "esp_sleep.h"
 #include "esp_log.h"
+#include "esp_memory_utils.h"
 #include "soc/soc_caps.h"
 
 #include "sdkconfig.h"
 
 #include "driver/gpio.h"
+#include "hal/gpio_hal.h"
 #include "esp_private/gpio.h"
 #include "esp_private/sleep_gpio.h"
 #include "esp_private/spi_flash_os.h"
@@ -94,3 +96,44 @@ void esp_sleep_enable_gpio_switch(bool enable)
 }
 
 #endif // SOC_GPIO_SUPPORT_SLP_SWITCH
+
+// TODO: IDF-6051, IDF-6052
+#if !CONFIG_IDF_TARGET_ESP32H2 && !CONFIG_IDF_TARGET_ESP32C6
+IRAM_ATTR void esp_sleep_isolate_digital_gpio(void)
+{
+    gpio_hal_context_t gpio_hal = {
+        .dev = GPIO_HAL_GET_HW(GPIO_PORT_0)
+    };
+
+    /* no need to do isolate if digital IOs are not being held in deep sleep */
+    if (!gpio_hal_deep_sleep_hold_is_en(&gpio_hal)) {
+        return;
+    }
+
+    /**
+     * there is a situation where we cannot isolate digital IO before deep sleep:
+     * - task stack is located in external ram(mspi ram), since we will isolate mspi io
+     *
+     * assert here instead of returning directly, because if digital IO is not isolated,
+     * the bottom current of deep sleep will be higher than light sleep, and there is no
+     * reason to use deep sleep at this time.
+     */
+    assert(esp_ptr_internal(&gpio_hal) && "If hold digital IO, the stack of the task calling esp_deep_sleep_start must be in internal ram!");
+
+    /* isolate digital IO that is not held(keep the configuration of digital IOs held by users) */
+    for (gpio_num_t gpio_num = GPIO_NUM_0; gpio_num < GPIO_NUM_MAX; gpio_num++) {
+        if (GPIO_IS_VALID_DIGITAL_IO_PAD(gpio_num) && !gpio_hal_is_digital_io_hold(&gpio_hal, gpio_num)) {
+            /* disable I/O */
+            gpio_hal_input_disable(&gpio_hal, gpio_num);
+            gpio_hal_output_disable(&gpio_hal, gpio_num);
+
+            /* disable pull up/down */
+            gpio_hal_pullup_dis(&gpio_hal, gpio_num);
+            gpio_hal_pulldown_dis(&gpio_hal, gpio_num);
+
+            /* make pad work as gpio(otherwise, deep sleep bottom current will rise) */
+            gpio_hal_func_sel(&gpio_hal, gpio_num, PIN_FUNC_GPIO);
+        }
+    }
+}
+#endif

components/esp_hw_support/sleep_modes.c

@@ -12,6 +12,7 @@
 #include "esp_attr.h"
 #include "esp_memory_utils.h"
 #include "esp_sleep.h"
+#include "esp_private/esp_sleep_internal.h"
 #include "esp_private/esp_timer_private.h"
 #include "esp_private/system_internal.h"
 #include "esp_log.h"
@@ -516,6 +517,11 @@ static uint32_t IRAM_ATTR esp_sleep_start(uint32_t pd_flags)
          */
         portENTER_CRITICAL(&spinlock_rtc_deep_sleep);
 
+// TODO: IDF-6051, IDF-6052
+#if !CONFIG_IDF_TARGET_ESP32H2 && !CONFIG_IDF_TARGET_ESP32C6
+        esp_sleep_isolate_digital_gpio();
+#endif
+
 #if SOC_PM_SUPPORT_DEEPSLEEP_CHECK_STUB_ONLY
         extern char _rtc_text_start[];
 #if CONFIG_ESP32S3_RTCDATA_IN_FAST_MEM