[v4, PATCH 2/2] dt-binding: mediatek-dwmac: add binding document for MediaTek MT2712 DWMAC
flat view
From: Andrew Lunn <andrew@lunn.ch>
Date: 2018-11-20 14:49:15
Also in:
linux-devicetree, linux-mediatek, lkml, netdev
quoted hunk ↗ jump to hunk
+Optional properties: +- mediatek,tx-delay: TX clock delay macro value. Range is 0~31. Default is 0. + It should be defined for rgmii/rgmii-rxid/mii interface. +- mediatek,rx-delay: RX clock delay macro value. Range is 0~31. Default is 0. + It should be defined for rgmii/rgmii-txid/mii/rmii interface. +- mediatek,fine-tune: boolean property, if present indicates that fine delay + is selected for rgmii interface. + If present, tx-delay/rx-delay is 170+/-50ps per stage. + Else tx-delay/rx-delay of coarse delay macro is 0.55+/-0.2ns per stage. + This property do not apply to non-rgmii PHYs. + Only coarse-tune delay is supported for mii/rmii PHYs.
Didn't Rob say to express the delay in pS, and have the driver convert
that to values to put into registers. That is what i would prefer.
Andrew