allwinner,sun6i-a31-msgbox.yaml (2067B)
1# SPDX-License-Identifier: GPL-2.0 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/mailbox/allwinner,sun6i-a31-msgbox.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Allwinner sunxi Message Box 8 9maintainers: 10 - Samuel Holland <samuel@sholland.org> 11 12description: | 13 The hardware message box on sun6i, sun8i, sun9i, and sun50i SoCs is a 14 two-user mailbox controller containing 8 unidirectional FIFOs. An interrupt 15 is raised for received messages, but software must poll to know when a 16 transmitted message has been acknowledged by the remote user. Each FIFO can 17 hold four 32-bit messages; when a FIFO is full, clients must wait before 18 attempting more transmissions. 19 20 Refer to ./mailbox.txt for generic information about mailbox device-tree 21 bindings. 22 23properties: 24 compatible: 25 oneOf: 26 - items: 27 - enum: 28 - allwinner,sun8i-a83t-msgbox 29 - allwinner,sun8i-h3-msgbox 30 - allwinner,sun9i-a80-msgbox 31 - allwinner,sun50i-a64-msgbox 32 - allwinner,sun50i-h6-msgbox 33 - const: allwinner,sun6i-a31-msgbox 34 - const: allwinner,sun6i-a31-msgbox 35 36 reg: 37 maxItems: 1 38 39 clocks: 40 maxItems: 1 41 description: bus clock 42 43 resets: 44 maxItems: 1 45 description: bus reset 46 47 interrupts: 48 maxItems: 1 49 50 '#mbox-cells': 51 const: 1 52 description: first cell is the channel number (0-7) 53 54required: 55 - compatible 56 - reg 57 - clocks 58 - resets 59 - interrupts 60 - '#mbox-cells' 61 62additionalProperties: false 63 64examples: 65 - | 66 #include <dt-bindings/clock/sun8i-h3-ccu.h> 67 #include <dt-bindings/interrupt-controller/arm-gic.h> 68 #include <dt-bindings/reset/sun8i-h3-ccu.h> 69 70 msgbox: mailbox@1c17000 { 71 compatible = "allwinner,sun8i-h3-msgbox", 72 "allwinner,sun6i-a31-msgbox"; 73 reg = <0x01c17000 0x1000>; 74 clocks = <&ccu CLK_BUS_MSGBOX>; 75 resets = <&ccu RST_BUS_MSGBOX>; 76 interrupts = <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>; 77 #mbox-cells = <1>; 78 }; 79 80...