Re: [PATCH RFC net-next 1/2] net: pcs: xpcs: Add special code to operate in Microchip KSZ9477 switch

[Andrew Lunn]

> For 1000BaseX mode setting neg_mode to false works, but that does not
> work for SGMII mode.  Setting 0x18 value in register 0x1f8001 allows
> 1000BaseX mode to work with auto-negotiation enabled.

Unless you have the datasheet, writing 0x18 to 0x1f8001 is pretty
meaningless. You need to explain what these two bits mean in this
register.

	Andrew