drivers: counter: introduce counter node in esp32 timers

Add counter device tree node to the esp32 timers.

Signed-off-by: Joel Guittet <joelguittet@gmail.com>

drivers/counter/counter_esp32_tmr.c

@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-#define DT_DRV_COMPAT espressif_esp32_timer
+#define DT_DRV_COMPAT espressif_esp32_counter
 
 #include <esp_clk_tree.h>
 #include <driver/timer_types_legacy.h>
@@ -360,10 +360,12 @@ static void counter_esp32_isr(void *arg)
 	timer_ll_clear_intr_status(data->hal_ctx.dev, TIMER_LL_EVENT_ALARM(data->hal_ctx.timer_id));
 }
 
+#define TIMER(idx)              DT_INST_PARENT(idx)
+
 #define ESP32_COUNTER_GET_CLK_DIV(idx)                                                             \
-	(((DT_INST_PROP(idx, prescaler) & UINT16_MAX) < 2)                                         \
+	(((DT_PROP(TIMER(idx), prescaler) & UINT16_MAX) < 2)                                       \
 		 ? 2                                                                               \
-		 : (DT_INST_PROP(idx, prescaler) & UINT16_MAX))
+		 : (DT_PROP(TIMER(idx), prescaler) & UINT16_MAX))
 
 #define ESP32_COUNTER_INIT(idx)                                                                    \
                                                                                                    \
@@ -382,13 +384,13 @@ static void counter_esp32_isr(void *arg)
 				.auto_reload = TIMER_AUTORELOAD_DIS,                               \
 				.divider = ESP32_COUNTER_GET_CLK_DIV(idx),                         \
 			},                                                                         \
-		.clock_dev = DEVICE_DT_GET(DT_INST_CLOCKS_CTLR(idx)),                              \
+		.clock_dev = DEVICE_DT_GET(DT_CLOCKS_CTLR(TIMER(idx))),                            \
-		.clock_subsys = (clock_control_subsys_t)DT_INST_CLOCKS_CELL(idx, offset),          \
+		.clock_subsys = (clock_control_subsys_t)DT_CLOCKS_CELL(TIMER(idx), offset),        \
-		.group = DT_INST_PROP(idx, group),                                                 \
+		.group = DT_PROP(TIMER(idx), group),                                               \
-		.index = DT_INST_PROP(idx, index),                                                 \
+		.index = DT_PROP(TIMER(idx), index),                                               \
-		.irq_source = DT_INST_IRQ_BY_IDX(idx, 0, irq),                                     \
+		.irq_source = DT_IRQ_BY_IDX(TIMER(idx), 0, irq),                                   \
-		.irq_priority = DT_INST_IRQ_BY_IDX(idx, 0, priority),                              \
+		.irq_priority = DT_IRQ_BY_IDX(TIMER(idx), 0, priority),                            \
-		.irq_flags = DT_INST_IRQ_BY_IDX(idx, 0, flags)};                                   \
+		.irq_flags = DT_IRQ_BY_IDX(TIMER(idx), 0, flags)};                                 \
                                                                                                    \
 	DEVICE_DT_INST_DEFINE(idx, counter_esp32_init, NULL, &counter_data_##idx,                  \
 			      &counter_config_##idx, PRE_KERNEL_1, CONFIG_COUNTER_INIT_PRIORITY,   \

dts/bindings/counter/espressif,esp32-counter.yaml

@@ -0,0 +1,8 @@
+# Copyright (c) 2025 Joel Guittet
+# SPDX-License-Identifier: Apache-2.0
+
+description: ESP32 counters
+
+compatible: "espressif,esp32-counter"
+
+include: base.yaml

dts/riscv/espressif/esp32c2/esp32c2_common.dtsi

@@ -181,6 +181,11 @@
 			interrupts = <TG0_T0_LEVEL_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
 			interrupt-parent = <&intc>;
 			status = "disabled";
+
+			counter {
+				compatible = "espressif,esp32-counter";
+				status = "disabled";
+			};
 		};
 
 		trng0: trng@3ff700b0 {

dts/riscv/espressif/esp32c3/esp32c3_common.dtsi

@@ -237,6 +237,11 @@
 			interrupts = <TG0_T0_LEVEL_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
 			interrupt-parent = <&intc>;
 			status = "disabled";
+
+			counter {
+				compatible = "espressif,esp32-counter";
+				status = "disabled";
+			};
 		};
 
 		timer1: counter@60020000 {
@@ -248,6 +253,11 @@
 			interrupts = <TG1_T0_LEVEL_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
 			interrupt-parent = <&intc>;
 			status = "disabled";
+
+			counter {
+				compatible = "espressif,esp32-counter";
+				status = "disabled";
+			};
 		};
 
 		trng0: trng@3ff700b0 {

dts/riscv/espressif/esp32c6/esp32c6_common.dtsi

@@ -118,6 +118,11 @@
 			interrupts = <TG0_T0_LEVEL_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
 			interrupt-parent = <&intc>;
 			status = "disabled";
+
+			counter {
+				compatible = "espressif,esp32-counter";
+				status = "disabled";
+			};
 		};
 
 		timer1: counter@60009000 {
@@ -129,6 +134,11 @@
 			interrupts = <TG1_T0_LEVEL_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
 			interrupt-parent = <&intc>;
 			status = "disabled";
+
+			counter {
+				compatible = "espressif,esp32-counter";
+				status = "disabled";
+			};
 		};
 
 		rtc: rtc@600b0000 {

dts/xtensa/espressif/esp32/esp32_common.dtsi

@@ -452,6 +452,11 @@
 			interrupts = <TG0_T0_LEVEL_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
 			interrupt-parent = <&intc>;
 			status = "disabled";
+
+			counter {
+				compatible = "espressif,esp32-counter";
+				status = "disabled";
+			};
 		};
 
 		timer1: counter@3ff5f024 {
@@ -463,6 +468,11 @@
 			interrupts = <TG0_T1_LEVEL_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
 			interrupt-parent = <&intc>;
 			status = "disabled";
+
+			counter {
+				compatible = "espressif,esp32-counter";
+				status = "disabled";
+			};
 		};
 
 		timer2: counter@3ff60000 {
@@ -474,6 +484,11 @@
 			interrupts = <TG1_T0_LEVEL_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
 			interrupt-parent = <&intc>;
 			status = "disabled";
+
+			counter {
+				compatible = "espressif,esp32-counter";
+				status = "disabled";
+			};
 		};
 
 		timer3: counter@3ff60024 {
@@ -485,6 +500,11 @@
 			interrupts = <TG1_T1_LEVEL_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
 			interrupt-parent = <&intc>;
 			status = "disabled";
+
+			counter {
+				compatible = "espressif,esp32-counter";
+				status = "disabled";
+			};
 		};
 
 		dac: dac@3ff48800 {

dts/xtensa/espressif/esp32s2/esp32s2_common.dtsi

@@ -280,6 +280,11 @@
 			interrupts = <TG0_T0_LEVEL_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
 			interrupt-parent = <&intc>;
 			status = "disabled";
+
+			counter {
+				compatible = "espressif,esp32-counter";
+				status = "disabled";
+			};
 		};
 
 		timer1: counter@3f41f024 {
@@ -291,6 +296,11 @@
 			interrupts = <TG0_T1_LEVEL_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
 			interrupt-parent = <&intc>;
 			status = "disabled";
+
+			counter {
+				compatible = "espressif,esp32-counter";
+				status = "disabled";
+			};
 		};
 
 		timer2: counter@3f420000 {
@@ -302,6 +312,11 @@
 			interrupts = <TG1_T0_LEVEL_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
 			interrupt-parent = <&intc>;
 			status = "disabled";
+
+			counter {
+				compatible = "espressif,esp32-counter";
+				status = "disabled";
+			};
 		};
 
 		timer3: counter@3f420024 {
@@ -312,6 +327,11 @@
 			index = <1>;
 			interrupts = <TG1_T1_LEVEL_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
 			interrupt-parent = <&intc>;
+
+			counter {
+				compatible = "espressif,esp32-counter";
+				status = "disabled";
+			};
 		};
 
 		trng0: trng@3f435110 {

dts/xtensa/espressif/esp32s3/esp32s3_common.dtsi

@@ -415,6 +415,11 @@
 			interrupts = <TG0_T0_LEVEL_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
 			interrupt-parent = <&intc>;
 			status = "disabled";
+
+			counter {
+				compatible = "espressif,esp32-counter";
+				status = "disabled";
+			};
 		};
 
 		timer1: counter@6001f024 {
@@ -426,6 +431,11 @@
 			interrupts = <TG0_T1_LEVEL_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
 			interrupt-parent = <&intc>;
 			status = "disabled";
+
+			counter {
+				compatible = "espressif,esp32-counter";
+				status = "disabled";
+			};
 		};
 
 		timer2: counter@60020000 {
@@ -437,6 +447,11 @@
 			interrupts = <TG1_T0_LEVEL_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
 			interrupt-parent = <&intc>;
 			status = "disabled";
+
+			counter {
+				compatible = "espressif,esp32-counter";
+				status = "disabled";
+			};
 		};
 
 		timer3: counter@60020024 {
@@ -447,6 +462,11 @@
 			index = <1>;
 			interrupts = <TG1_T1_LEVEL_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
 			interrupt-parent = <&intc>;
+
+			counter {
+				compatible = "espressif,esp32-counter";
+				status = "disabled";
+			};
 		};
 
 		wdt0: watchdog@6001f048 {

tests/drivers/counter/counter_basic_api/src/test_counter.c

@@ -103,7 +103,7 @@ static const struct device *const devices[] = {
 	DEVS_FOR_DT_COMPAT(xlnx_xps_timer_1_00_a)
 #endif
 #ifdef CONFIG_COUNTER_TMR_ESP32
-	DEVS_FOR_DT_COMPAT(espressif_esp32_timer)
+	DEVS_FOR_DT_COMPAT(espressif_esp32_counter)
 #endif
 #ifdef CONFIG_COUNTER_NXP_S32_SYS_TIMER
 	DEVS_FOR_DT_COMPAT(nxp_s32_sys_timer)