Hi Andrew,

On Fri, Sep 14, 2018 at 03:29:30PM +0200, Quentin Schulz wrote:

Hi Andrew,

On Fri, Sep 14, 2018 at 03:18:46PM +0200, Andrew Lunn wrote:

quoted

quoted

Most of the init sequence of a PHY of the package is common to all PHYs
in the package, thus we use the SMI broadcast feature which enables us
to propagate a write in one register of one PHY to all PHYs in the
package.

Hi Quinten

Could you say a bit more about the broadcast. Does the SMI broadcast
go to all PHY everywhere on an MDIO bus, or only all PHYs within one
package? I'm just thinking about the case you need two of these
packages to cover 8 switch ports.

Ah sorry, that wasn't very explicit. That's a feature on the PHY side so
my wildest guess is that it wouldn't impact any other PHY outside of
this package. Affecting any other PHY on the bus is counter-intuitive to
me but I'll ask the HW engineers for confirmation.

Confirmed by HW engineers, it only impacts PHYs in the same package.

Quentin