Re: Aw: [RFC PATCH net-next] dt-bindings: net: dsa: mediatek,mt7530: completely rework binding

["Arınç ÜNAL" <arinc.unal@arinc9.com>]

On 27.07.2022 23:31, Frank Wunderlich wrote:
> 
>> Gesendet: Dienstag, 26. Juli 2022 um 14:24 Uhr
>> Von: "Arınç ÜNAL" <arinc.unal@arinc9.com>
> 
> Hi,
> 
>> To Frank:
>> Let me know if MII bindings for port 5 and 6 on MT7531 are okay.
> 
> I ack krzysztof, that the change is really huge and it is hard to understand what exactly is changed and why. So please split. I have converted
> it to yaml, but not have changed the logic itself. I guess you know the switch better than me.
> 
>> Does your recent patch for MT7531 make it possible to set any port for CPU,
>> including user ports? For now, I put a rule to restrict CPU ports to 5 and
>> 6, as described on the description of dsa port reg property.
> 
> i only know that port 5 and 6 are possible, not about the other ports. Afair there was a check if port 5 or 6 (followed by available modes
> like rgmii, trgmii or sgmii) and then allow cpu-port-mode else allow only user-port mode. Had not changed this, so currently only these 2
> ports can be used as CPU.
> 
>> I suppose your patch does not bring support for using MT7530's port 5 as
>> CPU port. We could try this on a BPI-R2. Device schematics show that
>> MT7530's GMII pins are wired to GMAC1 of MT7623NI to work as RGMII.
> 
> my patches (and the version from Vladimir that was merged) only solves the Problem that CPU-Port was fixed to 6 before. I tested Patches on r2
> (mt7530) and r64 too (mt7531) that they do not break anything. But i have not disabled port 6 (maybe i had to do so for a port5-only mode), only
> enabled port 5 too and run iperf3 over a vlan-aware bridge between wan-port and port 5.

I've seen this under mt7530_setup():
The bit for MHWTRAP_P6_DIS is cleared to enable port 6 with the comment 
"Enable Port 6 only; P5 as GMAC5 which currently is not supported".

https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/tree/drivers/net/dsa/mt7530.c#n2189

I'm slowly learning C programming so I can't currently manage to do 
something on my own here, just letting you know.

Arınç