1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/mailbox/sophgo,cv1800b-mailbox.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Sophgo CV1800/SG2000 mailbox controller 8 9maintainers: 10 - Yuntao Dai <d1581209858@live.com> 11 - Junhui Liu <junhui.liu@pigmoral.tech> 12 13description: 14 Mailboxes integrated in Sophgo CV1800/SG2000 SoCs have 8 channels, each 15 shipping an 8-byte FIFO. Any processor can write to an arbitrary channel 16 and raise interrupts to receivers. Sending messages to itself is also 17 supported. 18 19properties: 20 compatible: 21 const: sophgo,cv1800b-mailbox 22 23 reg: 24 maxItems: 1 25 26 interrupts: 27 maxItems: 1 28 29 "#mbox-cells": 30 const: 2 31 description: | 32 <&phandle channel target> 33 phandle : Label name of mailbox controller 34 channel : 0-7, Channel index 35 target : 0-3, Target processor ID 36 37 Sophgo CV1800/SG2000 SoCs include the following processors, numbered as: 38 <0> Cortex-A53 (Only available on CV181X/SG200X) 39 <1> C906B 40 <2> C906L 41 <3> 8051 42 43required: 44 - compatible 45 - reg 46 - interrupts 47 - "#mbox-cells" 48 49additionalProperties: false 50 51examples: 52 - | 53 #include <dt-bindings/interrupt-controller/irq.h> 54 55 mailbox@1900000 { 56 compatible = "sophgo,cv1800b-mailbox"; 57 reg = <0x01900000 0x1000>; 58 interrupts = <101 IRQ_TYPE_LEVEL_HIGH>; 59 #mbox-cells = <2>; 60 }; 61