drivers: pinctrl: Add initial support for RZ/A2M

Add pinctrl support for RZ/A2M

Signed-off-by: Hieu Nguyen <[email protected]>
Signed-off-by: Binh Nguyen <[email protected]>

Author: Hieu Nguyen

boards/renesas/rza2m_evk/rza2m_evk-pinctrl.dtsi

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2025 Renesas Electronics Corporation
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/gpio/gpio.h>
+#include <zephyr/dt-bindings/pinctrl/renesas/pinctrl-rza2m.h>
+
+&pinctrl {
+	/omit-if-no-ref/ scif4_default: scif4_default {
+		scif4-pinmux {
+			pinmux = <RZA2M_PINMUX(PORT_09, 0, 4)>, /* TXD */
+				 <RZA2M_PINMUX(PORT_09, 1, 4)>; /* RXD */
+		};
+	};
+};

drivers/pinctrl/renesas/CMakeLists.txt

@@ -1,10 +1,11 @@
 # Copyright (c) 2024 EPAM Systems
-# Copyright (c) 2024 Renesas Electronics Corporation
+# Copyright (c) 2024-2025 Renesas Electronics Corporation
 # SPDX-License-Identifier: Apache-2.0
 
 zephyr_library_sources_ifdef(CONFIG_PINCTRL_RENESAS_RA_PFS ra/pinctrl_ra.c)
 zephyr_library_sources_ifdef(CONFIG_PINCTRL_RZT2M rz/pinctrl_rzt2m.c)
 zephyr_library_sources_ifdef(CONFIG_PINCTRL_SMARTBOND smartbond/pinctrl_smartbond.c)
 zephyr_library_sources_ifdef(CONFIG_PINCTRL_RENESAS_RZ rz/pinctrl_renesas_rz.c)
+zephyr_library_sources_ifdef(CONFIG_PINCTRL_RENESAS_RZA2M rz/pinctrl_renesas_rza2m.c)
 
 add_subdirectory_ifdef(CONFIG_PINCTRL_RCAR_PFC rcar)

drivers/pinctrl/renesas/rz/Kconfig

@@ -20,3 +20,10 @@ config PINCTRL_RENESAS_RZ
 	select USE_RZ_FSP_IOPORT
 	help
 	  Enable Renesas RZ pinctrl driver.
+
+config PINCTRL_RENESAS_RZA2M
+	bool "Renesas RZA2M pin controller driver"
+	default y
+	depends on DT_HAS_RENESAS_RZA2M_PINCTRL_ENABLED
+	help
+	  Enable Renesas RZ pinctrl driver.