Re: [PATCH 1/2] dt-bindings: usb: generic-ehci: document ignore-oc flag

[Álvaro Fernández Rojas]

Hi Alan,

> El 23 feb 2021, a las 16:54, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> escribió:
> 
> On Tue, Feb 23, 2021 at 04:50:04PM +0100, Álvaro Fernández Rojas wrote:
>> Over-current reporting isn't supported on some platforms such as bcm63xx.
>> These devices will incorrectly report over-current if this flag isn't properly
>> activated.
>> 
>> Signed-off-by: Álvaro Fernández Rojas <noltari@xxxxxxxxx>
>> ---
>> Documentation/devicetree/bindings/usb/generic-ehci.yaml | 5 +++++
>> 1 file changed, 5 insertions(+)
>> 
>> diff --git a/Documentation/devicetree/bindings/usb/generic-ehci.yaml b/Documentation/devicetree/bindings/usb/generic-ehci.yaml
>> index cf83f2d9afac..294bbf02399e 100644
>> --- a/Documentation/devicetree/bindings/usb/generic-ehci.yaml
>> +++ b/Documentation/devicetree/bindings/usb/generic-ehci.yaml
>> @@ -117,6 +117,11 @@ properties:
>>       Set this flag if EHCI has a Transaction Translator built into
>>       the root hub.
>> 
>> +  ignore-oc:
>> +    $ref: /schemas/types.yaml#/definitions/flag
>> +    description:
>> +      Set this flag for HCDs without over-current reporting support.
> 
> This is not a good description of a device property.  DT entries are 
> supposed to described the hardware, not talk about how to use it.

Any suggestions on a proper description?

> 
> When you say that the bcm63xx doesn't support over-current reporting, 
> what exactly do you mean?  Do you mean that sometimes the hardware turns 
> on the over-current bit when an over-current isn't actually present?  Or 
> do you mean something else?

Yes, the hardware turns on the over-current bit with no over-current present.

> 
> Alan Stern
> 
>> +
>>   needs-reset-on-resume:
>>     $ref: /schemas/types.yaml#/definitions/flag
>>     description:
>> -- 
>> 2.20.1

Best regards,
Álvaro.