target/linux/mediatek/patches-4.4/0048-net-next-mediatek-document-MediaTek-SoC-ethernet-bin.patch

   1 From 6efc8d9081b70dcf71d7e8efd7b51d48ee2541be Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Wed, 2 Mar 2016 07:18:52 +0100
   4 Subject: [PATCH 048/102] net-next: mediatek: document MediaTek SoC ethernet
   5  binding
   6
   7 This adds the binding documentation for the MediaTek Ethernet
   8 controller.
   9
  10 Signed-off-by: John Crispin <blogic@openwrt.org>
  11 Acked-by: Rob Herring <robh@kernel.org>
  12 Cc: devicetree@vger.kernel.org
  13 ---
  14  .../devicetree/bindings/net/mediatek-net.txt       |   77 ++++++++++++++++++++
  15  1 file changed, 77 insertions(+)
  16  create mode 100644 Documentation/devicetree/bindings/net/mediatek-net.txt
  17
  18 --- /dev/null
  19 +++ b/Documentation/devicetree/bindings/net/mediatek-net.txt
  20 @@ -0,0 +1,77 @@
  21 +MediaTek Frame Engine Ethernet controller
  22 +=========================================
  23 +
  24 +The frame engine ethernet controller can be found on MediaTek SoCs. These SoCs
  25 +have dual GMAC each represented by a child node..
  26 +
  27 +* Ethernet controller node
  28 +
  29 +Required properties:
  30 +- compatible: Should be "mediatek,mt2701-eth"
  31 +- reg: Address and length of the register set for the device
  32 +- interrupts: Should contain the frame engines interrupt
  33 +- clocks: the clock used by the core
  34 +- clock-names: the names of the clock listed in the clocks property. These are
  35 +       "ethif", "esw", "gp2", "gp1"
  36 +- power-domains: phandle to the power domain that the ethernet is part of
  37 +- resets: Should contain a phandle to the ethsys reset signal
  38 +- reset-names: Should contain the reset signal name "eth"
  39 +- mediatek,ethsys: phandle to the syscon node that handles the port setup
  40 +- mediatek,pctl: phandle to the syscon node that handles the ports slew rate
  41 +       and driver current
  42 +
  43 +Optional properties:
  44 +- interrupt-parent: Should be the phandle for the interrupt controller
  45 +  that services interrupts for this device
  46 +
  47 +
  48 +* Ethernet MAC node
  49 +
  50 +Required properties:
  51 +- compatible: Should be "mediatek,eth-mac"
  52 +- reg: The number of the MAC
  53 +- phy-handle: see ethernet.txt file in the same directory.
  54 +
  55 +Example:
  56 +
  57 +eth: ethernet@1b100000 {
  58 +       compatible = "mediatek,mt2701-eth";
  59 +       reg = <0 0x1b100000 0 0x20000>;
  60 +       clocks = <&topckgen CLK_TOP_ETHIF_SEL>,
  61 +                <&ethsys CLK_ETHSYS_ESW>,
  62 +                <&ethsys CLK_ETHSYS_GP2>,
  63 +                <&ethsys CLK_ETHSYS_GP1>;
  64 +       clock-names = "ethif", "esw", "gp2", "gp1";
  65 +       interrupts = <GIC_SPI 200 IRQ_TYPE_LEVEL_LOW>;
  66 +       power-domains = <&scpsys MT2701_POWER_DOMAIN_ETH>;
  67 +       resets = <&ethsys MT2701_ETHSYS_ETH_RST>;
  68 +       reset-names = "eth";
  69 +       mediatek,ethsys = <&ethsys>;
  70 +       mediatek,pctl = <&syscfg_pctl_a>;
  71 +       #address-cells = <1>;
  72 +       #size-cells = <0>;
  73 +
  74 +       gmac1: mac@0 {
  75 +               compatible = "mediatek,eth-mac";
  76 +               reg = <0>;
  77 +               phy-handle = <&phy0>;
  78 +       };
  79 +
  80 +       gmac2: mac@1 {
  81 +               compatible = "mediatek,eth-mac";
  82 +               reg = <1>;
  83 +               phy-handle = <&phy1>;
  84 +       };
  85 +
  86 +       mdio-bus {
  87 +               phy0: ethernet-phy@0 {
  88 +                       reg = <0>;
  89 +                       phy-mode = "rgmii";
  90 +               };
  91 +
  92 +               phy1: ethernet-phy@1 {
  93 +                       reg = <1>;
  94 +                       phy-mode = "rgmii";
  95 +               };
  96 +       };
  97 +};