drivers: can: Initial support for RZ/G3S

Add CAN driver support for Renesas RZ/G3S

Signed-off-by: Hieu Nguyen <hieu.nguyen.ym@bp.renesas.com>
Signed-off-by: Nhut Nguyen <nhut.nguyen.kc@renesas.com>

drivers/can/CMakeLists.txt

@@ -27,6 +27,7 @@ zephyr_library_sources_ifdef(CONFIG_CAN_NUMAKER             can_numaker.c)
 zephyr_library_sources_ifdef(CONFIG_CAN_NXP_S32_CANXL       can_nxp_s32_canxl.c)
 zephyr_library_sources_ifdef(CONFIG_CAN_RCAR                can_rcar.c)
 zephyr_library_sources_ifdef(CONFIG_CAN_RENESAS_RA_CANFD    can_renesas_ra.c)
+zephyr_library_sources_ifdef(CONFIG_CAN_RENESAS_RZ_CANFD    can_renesas_rz_canfd.c)
 zephyr_library_sources_ifdef(CONFIG_CAN_SAM                 can_sam.c)
 zephyr_library_sources_ifdef(CONFIG_CAN_SAM0                can_sam0.c)
 zephyr_library_sources_ifdef(CONFIG_CAN_SJA1000             can_sja1000.c)

drivers/can/Kconfig

@@ -130,6 +130,7 @@ source "drivers/can/Kconfig.mcp251xfd"
 source "drivers/can/Kconfig.xmc4xxx"
 source "drivers/can/Kconfig.nrf"
 source "drivers/can/Kconfig.renesas_ra"
+source "drivers/can/Kconfig.renesas_rz"
 
 source "drivers/can/transceiver/Kconfig"
 

drivers/can/Kconfig.renesas_rz

@@ -0,0 +1,11 @@
+# Copyright (c) 2025 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+config CAN_RENESAS_RZ_CANFD
+	bool "Renesas RZ CANFD"
+	default y
+	depends on DT_HAS_RENESAS_RZ_CANFD_ENABLED
+	select USE_RZ_FSP_CANFD
+	select CLOCK_CONTROL
+	help
+	  Enable Renesas RZ CANFD driver

dts/bindings/can/renesas,rz-canfd-global.yaml

@@ -0,0 +1,12 @@
+# Copyright (c) 2025 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+description: Renesas RZ CANFD controller global
+
+compatible: "renesas,rz-canfd-global"
+
+include: [base.yaml]
+
+properties:
+  interrupts:
+    required: true

dts/bindings/can/renesas,rz-canfd.yaml

@@ -0,0 +1,26 @@
+# Copyright (c) 2025 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+description: Renesas RZ CANFD controller
+
+compatible: "renesas,rz-canfd"
+
+include: [can-fd-controller.yaml, pinctrl-device.yaml]
+
+properties:
+  interrupts:
+    required: true
+
+  channel:
+    type: int
+    required: true
+
+  clocks:
+    required: true
+
+  rx-max-filters:
+    type: int
+    required: true
+    description: |
+      To determine the maximum rx filters can be added on this CAN device.
+      Valid range: 1 - 128

modules/Kconfig.renesas

@@ -230,6 +230,11 @@ config USE_RZ_FSP_MHU
 	help
 	  Enable RZ FSP MHU driver
 
+config USE_RZ_FSP_CANFD
+	bool
+	help
+	  Enable RZ FSP CANFD driver
+
 config USE_RZ_FSP_CPG
 	bool
 	help