Re: [PATCH v2 1/2] dt-bindings: chrome: Add binding for ChromeOS Pogo pin connector

[Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>]

On 6.02.2025 9:43 PM, Stephen Boyd wrote:
> Quoting Konrad Dybcio (2025-02-06 03:30:50)
>> On 6.02.2025 12:30 AM, Stephen Boyd wrote:
>>> diff --git a/Documentation/devicetree/bindings/chrome/google,pogo-pin-connector.yaml b/Documentation/devicetree/bindings/chrome/google,pogo-pin-connector.yaml
>>> new file mode 100644
>>> index 000000000000..622e171b6b08
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/chrome/google,pogo-pin-connector.yaml
>>> @@ -0,0 +1,68 @@
>>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>>> +%YAML 1.2
>>> +---
>>> +$id: http://devicetree.org/schemas/chrome/google,pogo-pin-connector.yaml#
>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>> +
>>> +title: Google Pogo Pin Connector
>>
>> This looks like a very generic piece of hw.. many boards (esp. convertibles)
>> do the same thing, with 4 or 5 pins on the bottom of the device.
> 
> Yes, connectors are basically just pins :-)
> 
>>
>> But of course hw manufacturers being hw manufacturers, many different kinds
>> of signals go through such connectors - if it's not USB then it's perhaps
>> I2C or some variation thereof
> 
> Right, and I doubt they call them "pogo".
> 
>>
>> IMO, we could perhaps add this to usb-connector.yaml as "usb-custom-connector"
>> or so
> 
> Do you have a device that could use such a generic binding? I can't
> really design something in the abstract without two or more concrete use
> cases. Coming up with something generic looks like a quagmire, because
> as you say the signals going through the pins could be anything: i2c,
> 1-wire, etc.

Right, we can't be overly generic either. FWIW I'm not standing in the way
of this patch getting merged.

Konrad

> At least this is a vendor prefixed binding, meaning a generic binding
> could supersede this one later. The risk of accepting this binding is
> low because it can be replaced by a more generic one at a later date.
> 
> I will move the file to usb/ so that it is more likely to be seen, but
> I'm hesitant to sign up to work on any sort of generic binding for USB2
> plus an extra pin used for who knows what.