[PATCH 0/6] Call phy_config at port probe time for the Felix DSA driver

[Michael Walle]

Am 2021-06-29 19:08, schrieb Vladimir Oltean:
> From: Vladimir Oltean <vladimir.oltean at nxp.com>
> 
> This series makes the Felix DSA driver initialize all its connected 
> PHYs
> regardless of whether those will be used for networking or not. This is
> in order to satisfy the expectations of some software in later boot
> stages.
> 
> To make this work, it is necessary to introduce a new method in struct
> dsa_ops: .port_probe().
> 
> There is some further refactoring/cleanup along the way.

Tested-by: Michael Walle <michael at walle.cc>

Seems like our PHYs are already in in-band signalling mode. I can't see
any difference after applying this series. Neither by using the port
in uboot, ie. "bootp; boot" nor booting directly into linux without
using the network.

Also, we have two different variants:
  - one where the switch is used in u-boot and in linux:
    arch/arm/dts/fsl-ls1028a-kontron-sl28-var2.dtb (DSA support still
    pending in u-boot)
  - one where we only use the switch in linux and u-boot doesn't touch
    the device at all:
    arch/arm/dts/fsl-ls1028a-kontron-sl28-var4.dtb

Do I understand it correctly, that for the latter variant DPDK would
be broken if the PHY hasn't in-band signalling enabled by default?
Because u-boot doesn't know the device and it won't setup the PHY
correctly.

Oh and I noticed that for var2 "managed = in-band-status" is missing
in the linux dtb; what a mess ;) I wonder how this ever worked..

-michael