Re: [PATCH] arm64: dts: qcom: ipq5018: Add pinctrl for MDIO bus

From: Dmitry Baryshkov

Date: Tue Aug 11 2026 - 17:45:06 EST


On Tue, Aug 11, 2026 at 11:24:13PM +0800, Jie Luo wrote:
>
>
> On 8/11/2026 10:00 PM, Kathiravan Thirumoorthy wrote:
> >
> > On 8/11/2026 7:06 PM, Luo Jie wrote:
> >> The external MDIO bus (mdio1) needs its MDC/MDIO lines configured via
> >> TLMM pinctrl; without this the pins are left in their default state and
> >> the bus does not function on boards that enable it.
> >
> > Should we move the TLMM definitions to the board DTS file rather than
> > keeping it in the SoC DTSI?
>
> The MDC/MDIO pin-group definition is SoC-specific. On IPQ5018, only
> these two TLMM pins support the MDIO interface—one for MDC and one for
> MDIO—with no alternative pin assignments available. Therefore, the
> definition can remain in the IPQ5018 pinctrl/SoC DTSI for reuse.

Is it expected that the drive strength is also common to all boards?

--
With best wishes
Dmitry