allwinner,sun6i-a31-msgbox.yaml

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    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 
    7 title: Allwinner sunxi Message Box
    8 
    9 maintainers:
   10   - Samuel Holland <samuel@sholland.org>
   11 
   12 description: |
   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 
   23 properties:
   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 
   54 required:
   55   - compatible
   56   - reg
   57   - clocks
   58   - resets
   59   - interrupts
   60   - '#mbox-cells'
   61 
   62 additionalProperties: false
   63 
   64 examples:
   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 ...

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/mailbox/allwinner,sun6i-a31-msgbox.yaml

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/mailbox/allwinner,sun6i-a31-msgbox.yaml