Re: [PATCH v2 08/12] ARM: dts: imx6dl-pico: fix board compatibles

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hello,

On 10/1/20 12:37 PM, Krzysztof Kozlowski wrote:
>> The existing binding doesn't cover these boards then and needs to be
>> extended, no? How about following patch?
> 
> What do you mean it doesn't cover? It was added exactly to handle them:
> +              - technexion,imx6q-pico-dwarf   # TechNexion i.MX6Q Pico-Dwarf
> +              - technexion,imx6q-pico-hobbit  # TechNexion i.MX6Q Pico-Hobbit
> +              - technexion,imx6q-pico-nymph   # TechNexion i.MX6Q Pico-Nymph
> +              - technexion,imx6q-pico-pi      # TechNexion i.MX6Q Pico-Pi
> 

Still they are unused. So I'd think these boards should be handled like boards
that predated bindings: a binding is written that doesn't break existing users.

>> [I guess we need to keep the two-compatible list they were originally
>>  in for compatibility even if it's unused among upstream device trees?]
> 
> You want to change both the binding (thus breaking the ABI) and update
> the DTS to reflect new ABI. Then why having a binding at all?

If we leave the old two-compatible enumeration intact, there is no ABI broken.

> I would assume that either binding is correct or DTS. You propose that
> both are wrong and both need changes... in such case this is clearly
> broken.

IMO the DTS is the correct one. If you want to honor the author's intention
that each base board has a different compatible, it should be an extra
compatible and not replace the existing one that may be already in use.

Cheers
Ahmad


> 
> Best regards,
> Krzysztof
> 

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |



[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]


  Powered by Linux