tests: drivers: counter: esp32: Add RTC counter support

Raffael Rostagno · Raffael Rostagno · commit 306b1b8a9e73 · 2025-10-01T15:27:20.000-03:00
Add RTC counter support (LP TIMER and RTC) for ESP32 chips.

Signed-off-by: Raffael Rostagno &lt;raffael.rostagno@espressif.com&gt;
diff --git a/tests/drivers/counter/counter_basic_api/socs/esp32_procpu.overlay b/tests/drivers/counter/counter_basic_api/socs/esp32_procpu.overlay
@@ -1,10 +1,20 @@
+/*
+ * Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 &timer0 {
 	status = "okay";
 	counter {
 		status = "okay";
 	};
 };
 
+&rtc_timer {
+	status = "okay";
+};
+
 &clock {
 	slow-clk-src = <ESP32_RTC_SLOW_CLK_SRC_RC_FAST_D256>;
 };
diff --git a/tests/drivers/counter/counter_basic_api/socs/esp32c2.overlay b/tests/drivers/counter/counter_basic_api/socs/esp32c2.overlay
@@ -1,3 +1,9 @@
+/*
+ * Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 &timer0 {
 	status = "okay";
 	counter {
diff --git a/tests/drivers/counter/counter_basic_api/socs/esp32c3.overlay b/tests/drivers/counter/counter_basic_api/socs/esp32c3.overlay
@@ -1,10 +1,20 @@
+/*
+ * Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 &timer0 {
 	status = "okay";
 	counter {
 		status = "okay";
 	};
 };
 
+&rtc_timer {
+	status = "okay";
+};
+
 &clock {
 	slow-clk-src = <ESP32_RTC_SLOW_CLK_SRC_RC_FAST_D256>;
 };
diff --git a/tests/drivers/counter/counter_basic_api/socs/esp32c3_usb.overlay b/tests/drivers/counter/counter_basic_api/socs/esp32c3_usb.overlay
@@ -1,10 +1,20 @@
+/*
+ * Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 &timer0 {
 	status = "okay";
 	counter {
 		status = "okay";
 	};
 };
 
+&rtc_timer {
+	status = "okay";
+};
+
 &clock {
 	slow-clk-src = <ESP32_RTC_SLOW_CLK_SRC_RC_FAST_D256>;
 };
diff --git a/tests/drivers/counter/counter_basic_api/socs/esp32c6_hpcore.overlay b/tests/drivers/counter/counter_basic_api/socs/esp32c6_hpcore.overlay
@@ -1,3 +1,9 @@
+/*
+ * Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 &timer0 {
 	status = "okay";
 	counter {
@@ -11,3 +17,7 @@
 		status = "okay";
 	};
 };
+
+&rtc_timer {
+	status = "okay";
+};
diff --git a/tests/drivers/counter/counter_basic_api/socs/esp32h2.conf b/tests/drivers/counter/counter_basic_api/socs/esp32h2.conf
@@ -0,0 +1,2 @@
+# LP Timer is driven by RC_SLOW, which has limited precision
+CONFIG_TEST_DRIVER_COUNTER_TOLERANCE=20
diff --git a/tests/drivers/counter/counter_basic_api/socs/esp32h2.overlay b/tests/drivers/counter/counter_basic_api/socs/esp32h2.overlay
@@ -1,3 +1,9 @@
+/*
+ * Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 &timer0 {
 	status = "okay";
 	counter {
@@ -11,3 +17,7 @@
 		status = "okay";
 	};
 };
+
+&rtc_timer {
+	status = "okay";
+};
diff --git a/tests/drivers/counter/counter_basic_api/socs/esp32s2.overlay b/tests/drivers/counter/counter_basic_api/socs/esp32s2.overlay
@@ -1,10 +1,20 @@
+/*
+ * Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 &timer0 {
 	status = "okay";
 	counter {
 		status = "okay";
 	};
 };
 
+&rtc_timer {
+	status = "okay";
+};
+
 &clock {
 	slow-clk-src = <ESP32_RTC_SLOW_CLK_SRC_RC_FAST_D256>;
 };
diff --git a/tests/drivers/counter/counter_basic_api/socs/esp32s3_procpu.overlay b/tests/drivers/counter/counter_basic_api/socs/esp32s3_procpu.overlay
@@ -1,3 +1,9 @@
+/*
+ * Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 &timer0 {
 	status = "okay";
 	counter {
diff --git a/tests/drivers/counter/counter_basic_api/src/test_counter.c b/tests/drivers/counter/counter_basic_api/src/test_counter.c
@@ -105,6 +105,9 @@ static const struct device *const devices[] = {
 #ifdef CONFIG_COUNTER_TMR_ESP32
 	DEVS_FOR_DT_COMPAT(espressif_esp32_counter)
 #endif
+#ifdef CONFIG_COUNTER_RTC_ESP32
+	DEVS_FOR_DT_COMPAT(espressif_esp32_rtc_timer)
+#endif
 #ifdef CONFIG_COUNTER_NXP_S32_SYS_TIMER
 	DEVS_FOR_DT_COMPAT(nxp_s32_sys_timer)
 #endif

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+# LP Timer is driven by RC_SLOW, which has limited precision`
	`2`	`+CONFIG_TEST_DRIVER_COUNTER_TOLERANCE=20`