Hi Rob,
On 12/12/20 4:18 am, Rob Herring wrote:
> On Fri, Dec 11, 2020 at 6:04 AM Aswath Govindraju <a-govindraju@xxxxxx> wrote:
>>
>> Hi,
>> On 11/12/20 11:34 am, Aswath Govindraju wrote:
>>> Add compatible string in j721e-usb binding file as the same USB subsystem
>>> is present in AM64.
>>>
>>> Signed-off-by: Aswath Govindraju <a-govindraju@xxxxxx>
>>> ---
>>>
>>> Changes since v3:
>>> - used enum instead of anyOf.
>>>
>>> Changes since v2:
>>> - added changes done over the versions.
>>>
>>> Changes since v1:
>>> - replaced the '\t' at the beginning of the lines with spaces as it was
>>> causing the dt_binding_check to fail.
>>>
>>> Documentation/devicetree/bindings/usb/ti,j721e-usb.yaml | 5 +++--
>>> 1 file changed, 3 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/Documentation/devicetree/bindings/usb/ti,j721e-usb.yaml b/Documentation/devicetree/bindings/usb/ti,j721e-usb.yaml
>>> index 388245b91a55..1a5c7bbb40d1 100644
>>> --- a/Documentation/devicetree/bindings/usb/ti,j721e-usb.yaml
>>> +++ b/Documentation/devicetree/bindings/usb/ti,j721e-usb.yaml
>>> @@ -11,8 +11,9 @@ maintainers:
>>>
>>> properties:
>>> compatible:
>>> - items:
>>> - - const: ti,j721e-usb
>>> + enum:
>>> + - ti,j721e-usb
>>> + - ti,am64-usb
>>>
>>
>> I am trying to use the compatible strings in the following manner
>>
>> ```
>> compatible = "ti,am64-usb", "ti,j721e-usb";
>>
>> ```
>> If I use above patch I am getting an error while doing a dtbs check.
>>
>> ```
>> /home/gsaswath/src/ti-linux-kernel/arch/arm64/boot/dts/ti/k3-am642-evm.dt.yaml:
>> cdns-usb@f900000: compatible: Additional items are not allowed
>> ('ti,j721e-usb' was unexpected)
>> From schema:
>> /home/gsaswath/src/ti-linux-kernel/Documentation/devicetree/bindings/usb/ti,j721e-usb.yaml
>> /home/gsaswath/src/ti-linux-kernel/arch/arm64/boot/dts/ti/k3-am642-evm.dt.yaml:
>> cdns-usb@f900000: compatible: ['ti,am64-usb', 'ti,j721e-usb'] is too long
>> From schema:
>> /home/gsaswath/src/ti-linux-kernel/Documentation/devicetree/bindings/usb/ti,j721e-usb.yaml
>>
>> ```
>>
>>
>> I have looked around for examples but I am unable to find a similar
>> case. I tried using anyOf in the following manner
>
> You didn't look hard enough. There are lots.
>
>> ```
>> compatible:
>> anyOf:
>> - const: ti,am64-usb
>> - const: ti,j721e-usb
>
> This is really no different than a single 'enum' with the 2 values.
> 'anyOf' means one or more in the list are true, but more than 1 is
> impossible here.
>
> If you have different possible lengths of values, then you need
> 'oneOf' for each case and then 'items' when you have a value with
> multiple entries:
>
> oneOf:
> - const: ti,j721e-usb
> - items:
> - const: ti,am64-usb
> - const: ti,j721e-usb
>
Thank you for the detailed explanation :) . I am sorry for not being
able figure this out on my own. I have sent a respin of this patch(v5).
Thanks,
Aswath
>> ```
>>
>> But I am getting an error
>>
>> ```
>> /home/gsaswath/src/ti-linux-kernel/Documentation/devicetree/bindings/usb/ti,j721e-usb.example.dt.yaml:
>> cdns_usb@4104000: compatible: 'anyOf' conditional failed, one must be fixed:
>> Additional items are not allowed ('ti,j721e-usb' was unexpected)
>> ['ti,am64-usb', 'ti,j721e-usb'] is too long
>> 'ti,j721e-usb' was expected
>> ```
>>
>> Doesn't anyof mean that the compatible strings can be used in any
>> combination ??
>>
>> Thanks,
>> Aswath
>>
>>> reg:
>>> description: module registers
>>>
>>
