pl011.yaml

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    1 # SPDX-License-Identifier: GPL-2.0
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/serial/pl011.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: ARM AMBA Primecell PL011 serial UART
    8 
    9 maintainers:
   10   - Rob Herring <robh@kernel.org>
   11 
   12 allOf:
   13   - $ref: serial.yaml#
   14 
   15 # Need a custom select here or 'arm,primecell' will match on lots of nodes
   16 select:
   17   properties:
   18     compatible:
   19       contains:
   20         enum:
   21           - arm,pl011
   22   required:
   23     - compatible
   24 
   25 properties:
   26   compatible:
   27     items:
   28       - const: arm,pl011
   29       - const: arm,primecell
   30 
   31   reg:
   32     maxItems: 1
   33 
   34   interrupts:
   35     maxItems: 1
   36 
   37   pinctrl-0: true
   38   pinctrl-1: true
   39 
   40   pinctrl-names:
   41     description:
   42       When present, must have one state named "default",
   43       and may contain a second name named "sleep". The former
   44       state sets up pins for ordinary operation whereas
   45       the latter state will put the associated pins to sleep
   46       when the UART is unused
   47     minItems: 1
   48     items:
   49       - const: default
   50       - const: sleep
   51 
   52   clocks:
   53     description:
   54       When present, the first clock listed must correspond to
   55       the clock named UARTCLK on the IP block, i.e. the clock
   56       to the external serial line, whereas the second clock
   57       must correspond to the PCLK clocking the internal logic
   58       of the block. Just listing one clock (the first one) is
   59       deprecated.
   60     maxItems: 2
   61 
   62   clock-names:
   63     items:
   64       - const: uartclk
   65       - const: apb_pclk
   66 
   67   dmas:
   68     minItems: 1
   69     maxItems: 2
   70 
   71   dma-names:
   72     minItems: 1
   73     items:
   74       - const: rx
   75       - const: tx
   76 
   77   auto-poll:
   78     description:
   79       Enables polling when using RX DMA.
   80     type: boolean
   81 
   82   poll-rate-ms:
   83     description:
   84       Rate at which poll occurs when auto-poll is set.
   85       default 100ms.
   86     default: 100
   87 
   88   poll-timeout-ms:
   89     description:
   90       Poll timeout when auto-poll is set, default
   91       3000ms.
   92     default: 3000
   93 
   94   resets:
   95     maxItems: 1
   96 
   97 required:
   98   - compatible
   99   - reg
  100   - interrupts
  101 
  102 dependencies:
  103   poll-rate-ms: [ auto-poll ]
  104   poll-timeout-ms: [ auto-poll ]
  105 
  106 unevaluatedProperties: false
  107 
  108 examples:
  109   - |
  110     serial@80120000 {
  111       compatible = "arm,pl011", "arm,primecell";
  112       reg = <0x80120000 0x1000>;
  113       interrupts = <0 11 4>;
  114       dmas = <&dma 13 0 0x2>, <&dma 13 0 0x0>;
  115       dma-names = "rx", "tx";
  116       clocks = <&foo_clk>, <&bar_clk>;
  117       clock-names = "uartclk", "apb_pclk";
  118     };
  119 
  120 ...

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sys/contrib/device-tree/Bindings/serial/pl011.yaml