tests: drivers: pwm: Add overlay for Milk-V boards

This commit adds an overlay to the PWM driver tests for Milk-V boards.

Signed-off-by: Chen Xingyu <[email protected]>

tests/drivers/pwm/pwm_api/boards/milkv_duo.overlay

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2023-2024 Chen Xingyu <[email protected]>
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	aliases {
+		pwm-0 = &pwm1;
+	};
+};
+
+&pinctrl {
+	pwm1_default: pwm1_default {
+		group1 {
+			pinmux = <CVI_PINMUX(SD1_D2, PWM_5)>;  /* GP4 */
+		};
+	};
+};
+
+&pwm1 {
+	status = "okay";
+	pinctrl-0 = <&pwm1_default>;
+	pinctrl-names = "default";
+};

tests/drivers/pwm/pwm_api/boards/milkv_duo256m.overlay

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2024 Chen Xingyu <[email protected]>
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	aliases {
+		pwm-0 = &pwm1;
+	};
+};
+
+&pinctrl {
+	pwm1_default: pwm1_default {
+		group1 {
+			pinmux = <CVI_PINMUX(SD1_D2, PWM_5)>;  /* GP4 */
+		};
+	};
+};
+
+&pwm1 {
+	status = "okay";
+	pinctrl-0 = <&pwm1_default>;
+	pinctrl-names = "default";
+};

tests/drivers/pwm/pwm_api/boards/milkv_duos.overlay

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2024 Chen Xingyu <[email protected]>
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	aliases {
+		pwm-0 = &pwm0;
+	};
+};
+
+&pinctrl {
+	pwm0_default: pwm0_default {
+		group1 {
+			pinmux = <CVI_PINMUX(VIVO_D1, PWM_3)>;  /* B20 */
+		};
+	};
+};
+
+&pwm0 {
+	status = "okay";
+	pinctrl-0 = <&pwm0_default>;
+	pinctrl-names = "default";
+};

tests/drivers/pwm/pwm_api/src/test_pwm.c

@@ -88,6 +88,10 @@
 #elif defined(CONFIG_BOARD_LPCXPRESSO55S69_LPC55S69_CPU0_NS) ||                                    \
 	defined(CONFIG_BOARD_LPCXPRESSO55S69_LPC55S69_CPU0)
 #define DEFAULT_PWM_PORT 2 /* D2 on Arduino connector P18 */
+#elif defined(CONFIG_BOARD_MILKV_DUO) || defined(CONFIG_BOARD_MILKV_DUO256M)
+#define DEFAULT_PWM_PORT 1
+#elif defined CONFIG_BOARD_MILKV_DUOS
+#define DEFAULT_PWM_PORT 3
 #elif DT_HAS_COMPAT_STATUS_OKAY(st_stm32_pwm)
 /* Default port should be adapted per board to fit the channel
  * associated to the PWM pin. For intsance, for following device,