Re: [PATCH v2] arm64: dts: qcom: sdm845-lg: Enable NFC

[David Heidelberg <david@ixit.cz>]

On 09/09/2026 15:16, Konrad Dybcio wrote:
> On 9/6/26 11:32 PM, David Heidelberg wrote:
>> On 06/09/2026 23:11, Paul Sajna wrote:
>>> Add the i2c and tlmm nodes to support the NXP PN547 NFC chip
>>>
>>> Downstream dtsi for reference:
>>> https://github.com/LineageOS/android_kernel_lge_sdm845/blob/lineage-22.2/arch/arm64/boot/dts/lge/sdm845-judy/sdm845-judyln_lao_com/sdm845-judyln_lao_com-nfc.dtsi
>>>
>>> Signed-off-by: Paul Sajna <sajattack@postmarketos.org>
>>> ---
> 
> [...]
> 
>>> +    nfc_default: nfc-default-state {
>>> +        pins = "gpio12", "gpio62", "gpio63", "gpio116";
>>
>> here the verbosity may not be bad (device-tree functions as documentation too)
>> gpio116 is associated with eSE NFC part (just guessing, but... it worked before, so), and generally the pn547 doesn't need it at all to work.
>>
>> TBH not sure if there or what consensus is here about this. The eSE needs it, but we don't have the driver thus also no integration with NFC part.
> 
> The eSE driver would still be acting on the NFC node, right?

So far that's the Android design. So, yes.

David

> 
> Konrad