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

[Jie Luo]

On 8/12/2026 5:44 AM, Dmitry Baryshkov wrote:
> 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?
>

Yes. The MDC/MDIO pin configurations, including the drive strength, are
identical across the IPQ5018 RDP boards.