Re: [net-next,PATCH v2] enetc: Increase eMDIO MDC rate to 2.5 MHz

[Marek Vasut]

On 9/30/26 4:10 AM, patchwork-bot+netdevbpf@xxxxxxxxxx wrote:
> Hello:
>
> This patch was applied to netdev/net-next.git (main)
> by Jakub Kicinski <kuba@xxxxxxxxxx>:
>
> On Thu, 24 Sep 2026 20:05:19 +0200 you wrote:
> > The current eMDIO MDC rate is 558 kHz on i.MX95 B0. This is very low,
> > but also very compatible. However, for example NXP TJA1120 PHY needs
> > at minimum 1 MHz MDC clock and 558 kHz does not work with that PHY.
> >
> > As a minimum change, increase the MDC clock to 2.5 MHz which matches
> > the 802.3 specification. Also, even old PHYs like LAN8210Ai, KSZ8794,
> > DP83822 support up to 2.5 MHz MDC clock frequency, and it covers the
> > NXP TJA1120 as well. There is no known rationale for why the 558 kHz
> > was picked when the eMDIO driver was added.
> >
> > [...]
>
> Here is the summary with links:
>    - [net-next,v2] enetc: Increase eMDIO MDC rate to 2.5 MHz
>      https://git.kernel.org/netdev/net-next/c/587acb86d646
This should have likely been applied only after someone from NXP looked 
at it.