samples: esp32: deep_sleep: Internal pull support

Some SoCs support EXT1 wake-up pins (RTC IOs) but do not provide
IOMUX features like internal pull-up/down resistors. Support for
these features is indicated by SOC_RTCIO_INPUT_OUTPUT_SUPPORTED.
This change updates the test configuration to account for this
and fixes EXT1 pin mapping for ESP32-H2.

Signed-off-by: Raffael Rostagno <[email protected]>

Author: Raffael Rostagno

samples/boards/espressif/deep_sleep/Kconfig

@@ -1,4 +1,4 @@
-# Copyright (c) 2022 Espressif Systems (Shanghai) Co., Ltd.
+# Copyright (c) 2022-2025 Espressif Systems (Shanghai) Co., Ltd.
 # SPDX-License-Identifier: Apache-2.0
 
 mainmenu "Espressif Deep Sleep demo"
@@ -8,11 +8,12 @@ config EXAMPLE_EXT1_WAKEUP
 	depends on !SOC_SERIES_ESP32C3
 	select GPIO
 	help
-	  This option enables wake-up from deep sleep using GPIO2 and
-	  GPIO4. The sample enables internal pull-down on EXT1 pins to
-	  avoid random wake-ups. Otherwise, external pull-down should
-	  be used for the same purpose. To trigger a wake-up, connect
-	  one or both of the pins to HIGH.
+	  This option enables wake-up from deep sleep using RTC IO
+	  pins. On targets which support internal pull resistors for
+	  RTC IOs, the sample enables internal pull-down on EXT1 pins
+	  to avoid spurious wake-ups. On targets without this hardware
+	  feature, external pull-down resistors should be used instead.
+	  To trigger a wake-up, connect one or both of the pins to HIGH.
 
 config EXAMPLE_GPIO_WAKEUP
 	bool "Enable wakeup from GPIO"

samples/boards/espressif/deep_sleep/src/main.c

@@ -7,14 +7,21 @@
 #include <zephyr/drivers/gpio.h>
 #include <zephyr/sys/poweroff.h>
 #include <esp_sleep.h>
+#if SOC_RTCIO_INPUT_OUTPUT_SUPPORTED
 #include <driver/rtc_io.h>
+#endif
 
 #include <esp_attr.h>
 
 #ifdef CONFIG_EXAMPLE_EXT1_WAKEUP
+#ifdef CONFIG_SOC_SERIES_ESP32H2
+#define EXT_WAKEUP_PIN_1	(10)
+#define EXT_WAKEUP_PIN_2	(11)
+#else
 #define EXT_WAKEUP_PIN_1	(2)
 #define EXT_WAKEUP_PIN_2	(4)
 #endif
+#endif
 
 #ifdef CONFIG_EXAMPLE_GPIO_WAKEUP
 #if !DT_NODE_HAS_STATUS_OKAY(DT_ALIAS(wakeup_button))
@@ -90,11 +97,13 @@ int main(void)
 	esp_sleep_enable_ext1_wakeup(ext_wakeup_pin_1_mask | ext_wakeup_pin_2_mask,
 			ESP_EXT1_WAKEUP_ANY_HIGH);
 
+#if SOC_RTCIO_INPUT_OUTPUT_SUPPORTED
 	/* enable pull-down on ext1 pins to avoid random wake-ups */
 	rtc_gpio_pullup_dis(EXT_WAKEUP_PIN_1);
 	rtc_gpio_pulldown_en(EXT_WAKEUP_PIN_1);
 	rtc_gpio_pullup_dis(EXT_WAKEUP_PIN_2);
 	rtc_gpio_pulldown_en(EXT_WAKEUP_PIN_2);
+#endif
 #endif /* CONFIG_EXAMPLE_EXT1_WAKEUP */
 #ifdef CONFIG_EXAMPLE_GPIO_WAKEUP
 	if (!gpio_is_ready_dt(&wakeup_button)) {