Re: [PATCH v2 2/2] arm64: dts: qcom: sdm845-shift-axolotl: Enable NFC

From: Konrad Dybcio

Date: Wed Mar 25 2026 - 07:28:51 EST


On 3/24/26 7:08 PM, David Heidelberg wrote:
>
>
> On 24/03/2026 14:12, Konrad Dybcio wrote:
>> On 3/24/26 12:20 AM, David Heidelberg via B4 Relay wrote:
>>> From: David Heidelberg <david@xxxxxxx>
>>>
>>> Definition of the NFC.
>>
>> "meh" commit message
>>
>> [...]
>>
>>> +    nfc_enable_default: nfc-enable-default-state {
>>> +        pins = "gpio12", "gpio62";
>>> +        function = "gpio";
>>> +        drive-strength = <2>;
>>> +        bias-pull-up;
>>
>> Are you sure about pulling up an active-high pin?
>
> I'm not sure, but downstream does it (and "works for me"). Maybe Alexander would know more details here.

Would changing it to bias-disable also "work for you"?

>
> David
>
>>
>> FWIW TLMM subnodes are best sorted by pin index (although the file
>> currently doesn't really do that) as per dts coding style
>
> I assume when I group the -pins into -state it doesn't apply anymore? As I don't feel having pins relevant to one device / subsystem all over the place is extra clean.

Krzysztof?

Konrad