amlogic,meson-dwmac.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
    2 # Copyright 2019 BayLibre, SAS
    3 %YAML 1.2
    4 ---
    5 $id: "http://devicetree.org/schemas/net/amlogic,meson-dwmac.yaml#"
    6 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
    7 
    8 title: Amlogic Meson DWMAC Ethernet controller
    9 
   10 maintainers:
   11   - Neil Armstrong <neil.armstrong@linaro.org>
   12   - Martin Blumenstingl <martin.blumenstingl@googlemail.com>
   13 
   14 # We need a select here so we don't match all nodes with 'snps,dwmac'
   15 select:
   16   properties:
   17     compatible:
   18       contains:
   19         enum:
   20           - amlogic,meson6-dwmac
   21           - amlogic,meson8b-dwmac
   22           - amlogic,meson8m2-dwmac
   23           - amlogic,meson-gxbb-dwmac
   24           - amlogic,meson-axg-dwmac
   25           - amlogic,meson-g12a-dwmac
   26   required:
   27     - compatible
   28 
   29 allOf:
   30   - $ref: "snps,dwmac.yaml#"
   31   - if:
   32       properties:
   33         compatible:
   34           contains:
   35             enum:
   36               - amlogic,meson8b-dwmac
   37               - amlogic,meson8m2-dwmac
   38               - amlogic,meson-gxbb-dwmac
   39               - amlogic,meson-axg-dwmac
   40               - amlogic,meson-g12a-dwmac
   41 
   42     then:
   43       properties:
   44         clocks:
   45           minItems: 3
   46           items:
   47             - description: GMAC main clock
   48             - description: First parent clock of the internal mux
   49             - description: Second parent clock of the internal mux
   50             - description: The clock which drives the timing adjustment logic
   51 
   52         clock-names:
   53           minItems: 3
   54           items:
   55             - const: stmmaceth
   56             - const: clkin0
   57             - const: clkin1
   58             - const: timing-adjustment
   59 
   60         amlogic,tx-delay-ns:
   61           $ref: /schemas/types.yaml#/definitions/uint32
   62           description:
   63             The internal RGMII TX clock delay (provided by this driver) in
   64             nanoseconds. Allowed values are 0ns, 2ns, 4ns, 6ns.
   65             When phy-mode is set to "rgmii" then the TX delay should be
   66             explicitly configured. When not configured a fallback of 2ns is
   67             used. When the phy-mode is set to either "rgmii-id" or "rgmii-txid"
   68             the TX clock delay is already provided by the PHY. In that case
   69             this property should be set to 0ns (which disables the TX clock
   70             delay in the MAC to prevent the clock from going off because both
   71             PHY and MAC are adding a delay).
   72             Any configuration is ignored when the phy-mode is set to "rmii".
   73 
   74         amlogic,rx-delay-ns:
   75           deprecated: true
   76           enum:
   77             - 0
   78             - 2
   79           default: 0
   80           description:
   81             The internal RGMII RX clock delay in nanoseconds. Deprecated, use
   82             rx-internal-delay-ps instead.
   83 
   84         rx-internal-delay-ps:
   85           default: 0
   86 
   87   - if:
   88       properties:
   89         compatible:
   90           contains:
   91             enum:
   92               - amlogic,meson8b-dwmac
   93               - amlogic,meson8m2-dwmac
   94               - amlogic,meson-gxbb-dwmac
   95               - amlogic,meson-axg-dwmac
   96     then:
   97       properties:
   98         rx-internal-delay-ps:
   99           enum:
  100             - 0
  101             - 2000
  102 
  103   - if:
  104       properties:
  105         compatible:
  106           contains:
  107             enum:
  108               - amlogic,meson-g12a-dwmac
  109     then:
  110       properties:
  111         rx-internal-delay-ps:
  112           enum:
  113             - 0
  114             - 200
  115             - 400
  116             - 600
  117             - 800
  118             - 1000
  119             - 1200
  120             - 1400
  121             - 1600
  122             - 1800
  123             - 2000
  124             - 2200
  125             - 2400
  126             - 2600
  127             - 2800
  128             - 3000
  129 
  130 properties:
  131   compatible:
  132     additionalItems: true
  133     maxItems: 3
  134     items:
  135       - enum:
  136           - amlogic,meson6-dwmac
  137           - amlogic,meson8b-dwmac
  138           - amlogic,meson8m2-dwmac
  139           - amlogic,meson-gxbb-dwmac
  140           - amlogic,meson-axg-dwmac
  141           - amlogic,meson-g12a-dwmac
  142     contains:
  143       enum:
  144         - snps,dwmac-3.70a
  145         - snps,dwmac
  146 
  147   reg:
  148     items:
  149       - description:
  150           The first register range should be the one of the DWMAC controller
  151       - description:
  152           The second range is is for the Amlogic specific configuration
  153           (for example the PRG_ETHERNET register range on Meson8b and newer)
  154 
  155 required:
  156   - compatible
  157   - reg
  158   - interrupts
  159   - interrupt-names
  160   - clocks
  161   - clock-names
  162   - phy-mode
  163 
  164 unevaluatedProperties: false
  165 
  166 examples:
  167   - |
  168     ethmac: ethernet@c9410000 {
  169          compatible = "amlogic,meson-gxbb-dwmac", "snps,dwmac";
  170          reg = <0xc9410000 0x10000>, <0xc8834540 0x8>;
  171          interrupts = <8>;
  172          interrupt-names = "macirq";
  173          clocks = <&clk_eth>, <&clk_fclk_div2>, <&clk_mpll2>, <&clk_fclk_div2>;
  174          clock-names = "stmmaceth", "clkin0", "clkin1", "timing-adjustment";
  175          phy-mode = "rgmii";
  176     };

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