Commit 52b2fe45 authored by Wei Fang's avatar Wei Fang Committed by Jakub Kicinski
Browse files

dt-bindings: net: tja11xx: add nxp,refclk_in property 



TJA110x REF_CLK can be configured as interface reference clock
intput or output when the RMII mode enabled. This patch add the
property to make the REF_CLK can be configurable.

Signed-off-by: default avatarWei Fang <wei.fang@nxp.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 3de1484b

Documentation/devicetree/bindings/net/nxp,tja11xx.yaml

+17 −0
Original line number Diff line number Diff line
@@ -31,6 +31,22 @@ patternProperties: 
        description:

          The ID number for the child PHY. Should be +1 of parent PHY.



      nxp,rmii-refclk-in:

        type: boolean

        description: |

          The REF_CLK is provided for both transmitted and received data

          in RMII mode. This clock signal is provided by the PHY and is

          typically derived from an external 25MHz crystal. Alternatively,

          a 50MHz clock signal generated by an external oscillator can be

          connected to pin REF_CLK. A third option is to connect a 25MHz

          clock to pin CLK_IN_OUT. So, the REF_CLK should be configured

          as input or output according to the actual circuit connection.

          If present, indicates that the REF_CLK will be configured as

          interface reference clock input when RMII mode enabled.

          If not present, the REF_CLK will be configured as interface

          reference clock output when RMII mode enabled.

          Only supported on TJA1100 and TJA1101.



    required:

      - reg
@@ -44,6 +60,7 @@ examples: 


        tja1101_phy0: ethernet-phy@4 {

            reg = <0x4>;

            nxp,rmii-refclk-in;

        };

    };

  - |