Feature/soft 5329 can v6.8

Documentation/devicetree/bindings/net/can/holtek,ht42b416.yaml

@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/can/holtek,ht42b416.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Holtek HT42B416 UART to CAN bus bridge
+
+maintainers:
+  - Anton Tarasov <ant0@mail.ru>
+
+description:
+  The Holtek HT42B416-x devices expose a CAN 2.0A/B controller via a UART
+  interface. The controller is configured with ASCII commands terminated by
+  carriage return characters and is normally attached to a SoC UART using the
+  serdev framework.
+
+allOf:
+  - $ref: /schemas/net/can/can-controller.yaml#
+
+properties:
+  compatible:
+    const: holtek,ht42b416
+
+  current-speed:
+    description: UART baud rate used to communicate with the bridge.
+    default: 115200
+
+  enable-gpios:
+    maxItems: 1
+    description:
+      Optional GPIO used to drive the CE pin of the bridge. The line should be
+      driven high to enable the device and low to reset or power it down.
+
+required:
+  - compatible
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    &uart4 {
+        pinctrl-names = "default";
+        pinctrl-0 = <&pinctrl_mod3_txrx_uart>;
+        status = "okay";
+
+        can@0 {
+            compatible = "holtek,ht42b416";
+            current-speed = <115200>;
+            enable-gpios = <&pio PG 10 GPIO_ACTIVE_HIGH>;
+        };
+    };
+...

MAINTAINERS

@@ -9413,6 +9413,13 @@ M:	Alexander Shishkin <alexander.shishkin@linux.intel.com>
 S:	Maintained
 F:	drivers/hwtracing/
 
+HOLTEK HT42B416 CAN DRIVER
+M:	Anton Tarasov <ant0@mail.ru>
+L:	linux-can@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/net/can/holtek,ht42b416.yaml
+F:	drivers/net/can/ht42b416.c
+
 HARMONY SOUND DRIVER
 L:	linux-parisc@vger.kernel.org
 S:	Maintained

arch/arm64/configs/wb8.config

@@ -161,6 +161,7 @@ CONFIG_INET6_XFRM_MODE_BEET=m
 # CAN support
 CONFIG_CAN=y
 CONFIG_CAN_GS_USB=m
+CONFIG_CAN_HT42B416=m
 
 # Docker
 CONFIG_BLK_CGROUP=y

debian/changelog

@@ -1,3 +1,9 @@
+linux-wb (6.8.0-wb149) stable; urgency=medium
+
+  *  wbe2-i-can: add support for CAN-module based on Holtek ht42b41
+
+ -- Anton Tarasov <anton.tarasov@wirenboard.com>  Fri, 16 Jan 2026 11:05:02 +0300
+
 linux-wb (6.8.0-wb148) stable; urgency=medium
 
   * wb8.5 HDMI: reject >30Hz 4K modes on H616 since T507-H can’t drive 4K60 reliably

drivers/net/can/Kconfig

@@ -124,6 +124,17 @@ config CAN_CAN327
 
 	  If this driver is built as a module, it will be called can327.
 
+config CAN_HT42B416
+	tristate "Holtek HT42B416 UART-to-CAN bridge"
+	depends on SERIAL_DEV_BUS && OF
+	help
+	  Enable support for the Holtek HT42B416 UART to CAN bridge chips.
+	  The driver uses the serdev framework to talk to the bridge via a SoC
+	  UART and exposes a SocketCAN network interface.
+
+	  To compile this driver as a module, choose M here: the module will be
+	  called ht42b416.
+
 config CAN_FLEXCAN
 	tristate "Support for Freescale FLEXCAN based chips"
 	depends on OF || COLDFIRE || COMPILE_TEST

drivers/net/can/Makefile

@@ -16,6 +16,7 @@ obj-y				+= softing/
 obj-$(CONFIG_CAN_AT91)		+= at91_can.o
 obj-$(CONFIG_CAN_BXCAN)		+= bxcan.o
 obj-$(CONFIG_CAN_CAN327)	+= can327.o
+obj-$(CONFIG_CAN_HT42B416)	+= ht42b416.o
 obj-$(CONFIG_CAN_CC770)		+= cc770/
 obj-$(CONFIG_CAN_C_CAN)		+= c_can/
 obj-$(CONFIG_CAN_CTUCANFD)	+= ctucanfd/