Documentation/devicetree/bindings/net/mdio-mux-meson-g12a.txt

   1 Properties for the MDIO bus multiplexer/glue of Amlogic G12a SoC family.
   2
   3 This is a special case of a MDIO bus multiplexer. It allows to choose between
   4 the internal mdio bus leading to the embedded 10/100 PHY or the external
   5 MDIO bus.
   6
   7 Required properties in addition to the generic multiplexer properties:
   8 - compatible : amlogic,g12a-mdio-mux
   9 - reg: physical address and length of the multiplexer/glue registers
  10 - clocks: list of clock phandle, one for each entry clock-names.
  11 - clock-names: should contain the following:
  12   * "pclk"   : peripheral clock.
  13   * "clkin0" : platform crytal
  14   * "clkin1" : SoC 50MHz MPLL
  15
  16 Example :
  17
  18 mdio_mux: mdio-multiplexer@4c000 {
  19         compatible = "amlogic,g12a-mdio-mux";
  20         reg = <0x0 0x4c000 0x0 0xa4>;
  21         clocks = <&clkc CLKID_ETH_PHY>,
  22                  <&xtal>,
  23                  <&clkc CLKID_MPLL_5OM>;
  24         clock-names = "pclk", "clkin0", "clkin1";
  25         mdio-parent-bus = <&mdio0>;
  26         #address-cells = <1>;
  27         #size-cells = <0>;
  28
  29         ext_mdio: mdio@0 {
  30                 reg = <0>;
  31                 #address-cells = <1>;
  32                 #size-cells = <0>;
  33         };
  34
  35         int_mdio: mdio@1 {
  36                 reg = <1>;
  37                 #address-cells = <1>;
  38                 #size-cells = <0>;
  39
  40                 internal_ephy: ethernet-phy@8 {
  41                         compatible = "ethernet-phy-id0180.3301",
  42                                      "ethernet-phy-ieee802.3-c22";
  43                         interrupts = <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
  44                         reg = <8>;
  45                         max-speed = <100>;
  46                 };
  47         };
  48 };