boards: renesas: Add configurations to support pwm on MCK-RA8T1

Add support for PWM driver on MCK-RA8T1

Signed-off-by: Quy Tran <[email protected]>

Author: quytranpzz

boards/renesas/mck_ra8t1/doc/index.rst

@@ -102,6 +102,8 @@ The below features are currently supported on Zephyr OS for MCB-RA8T1 board:
 +--------------+------------+----------------------+
 | FLASH        | on-chip    | flash                |
 +--------------+------------+----------------------+
+| PWM          | on-chip    | pwm                  |
++--------------+------------+----------------------+
 
 Other hardware features are currently not supported by the port.
 

boards/renesas/mck_ra8t1/mck_ra8t1-pinctrl.dtsi

@@ -25,4 +25,15 @@
 			<RA_PSEL(RA_PSEL_SPI, 2, 4)>;
 		};
 	};
+
+	pwm2_default: pwm2_default {
+		group1 {
+			/* GTIOC2A */
+			psels = <RA_PSEL(RA_PSEL_GPT1, 1, 13)>;
+		};
+		group2 {
+			/* GTIOC2B */
+			psels = <RA_PSEL(RA_PSEL_GPT1, 1, 14)>;
+		};
+	};
 };

boards/renesas/mck_ra8t1/mck_ra8t1.dts

@@ -118,3 +118,11 @@
 		};
 	};
 };
+
+&pwm2 {
+	pinctrl-0 = <&pwm2_default>;
+	interrupts = <40 1>, <41 1>;
+	interrupt-names = "gtioca", "overflow";
+	pinctrl-names = "default";
+	status = "okay";
+};

tests/drivers/pwm/pwm_loopback/boards/mck_ra8t1.overlay

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2024 Renesas Electronics Corporation
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/pwm/pwm.h>
+#include <zephyr/dt-bindings/pwm/ra_pwm.h>
+
+/ {
+	pwm_loopback_0 {
+		compatible = "test-pwm-loopback";
+		/* first index must be a 32-Bit timer */
+		pwms = <&pwm2 0 0 PWM_POLARITY_NORMAL>,
+			<&pwm5 0 0 PWM_POLARITY_NORMAL>;
+	};
+};
+
+&pinctrl {
+	pwm5_default: pwm5_default {
+		group1 {
+			/* GTIOC5A */
+			psels = <RA_PSEL(RA_PSEL_GPT1, 1, 15)>;
+		};
+		group2 {
+			/* GTIOC5B */
+			psels = <RA_PSEL(RA_PSEL_GPT1, 6, 9)>;
+		};
+	};
+};
+
+&pwm5 {
+	pinctrl-0 = <&pwm5_default>;
+	pinctrl-names = "default";
+	interrupts = <50 1>, <51 1>;
+	interrupt-names = "gtioca", "overflow";
+	status = "okay";
+};