Re: [PATCH v4 0/7] net: dsa: mt7530: support EcoNet EN751221

[Paolo Abeni <pabeni@redhat.com>]

On 10/29/26 19:41, Caleb James DeLisle wrote:
> The EcoNet EN751221 has a unique switch configuration. Every chip made
> with an EN751221 die has at least one on-die MT7530 that is MMIO based.
> This switch has 3x 10/100 ports and 1x gigabit port.
> 
> Some popular chip packages such as the EN7513G and EN7526G have another
> MT7530 implemented as a multi-chip-module that connects to port 5 of
> the on-die switch and is controlled via the MDIO controller integrated
> in the on-die MT7530.
> 
> In this configurations, the upstream switch is put into a "passthrough"
> mode in which all traffic is forwarded between port 5 and port 6
> without altering its DSA tags.
> 
> Furthermore, since the DSA core does not call mt753x_setup until all
> switches are present, and the downstream switch only becomes available
> when the upstream switch has configured its MDIO controller, the MDIO
> controller setup on MMIO implementations must be done before
> mt753x_setup, or else it will never complete.
> 
> Finally, the on-die switch and the MCM switch connect via a TRGMII link
> which requires calibration. In order to calibrate this, PLL adjustment
> must be possible on the on-die switch, necessitating changes to the
> core_(set|clear|write|rmw) functions to support MMIO implementations.
> 
> Solve all of these issues, add the TRGMII calibration, and add support
> for both switches.
> 
> Since this patchset will probably be subject to some discussion, please
> consider accepting any patches that are non-controversial since it will
> make future re-submissions easier.
Does not apply cleanly, please resubmit. While at it, please add the 'net-next'
subj prefix.

/P