Messages in this thread | | | Date | Sat, 28 Jan 2023 16:05:55 +0100 | From | Andrew Lunn <> | Subject | Re: [PATCH net-next v2 1/5] dt-bindings: net: Add Motorcomm yt8xxx ethernet phy |
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> +properties: > + rx-internal-delay-ps: > + description: | > + RGMII RX Clock Delay used only when PHY operates in RGMII mode with > + internal delay (phy-mode is 'rgmii-id' or 'rgmii-rxid') in pico-seconds. > + enum: [ 0, 150, 300, 450, 600, 750, 900, 1050, 1200, 1350, 1500, 1650, > + 1800, 1900, 1950, 2050, 2100, 2200, 2250, 2350, 2500, 2650, 2800, > + 2950, 3100, 3250, 3400, 3550, 3700, 3850, 4000, 4150 ] > + default: 1900 > + > + tx-internal-delay-ps: > + description: | > + RGMII TX Clock Delay used only when PHY operates in RGMII mode with > + internal delay (phy-mode is 'rgmii-id' or 'rgmii-txid') in pico-seconds. > + enum: [ 0, 150, 300, 450, 600, 750, 900, 1050, 1200, 1350, 1500, 1650, 1800, > + 1950, 2100, 2250 ] > + default: 150
That is an odd default to choose. rgmii-id or rgmii-txid means the PHY should be added around 2ns of delay. So a default of 1950 makes more sense.
Andrew
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