Re: [PATCH] devicetree - document using aliases to set spi bus number.

From: Frank Rowand
Date: Tue May 24 2016 - 20:18:42 EST

On 5/24/2016 4:34 PM, Frank Rowand wrote:
> On 5/24/2016 11:32 AM, Mark Brown wrote:
>> On Tue, May 24, 2016 at 08:03:48PM +0200, Christer Weinigel wrote:
>>> On 05/24/2016 07:20 PM, Mark Brown wrote:
>>>> I'm not sure this is something we want to support at all, I can't
>>>> immediately see anything that does this deliberately in the SPI
>>>> code and obviously the "bus number" is something of a Linux
>>>> specific concept which would need some explanation if we were going
>>>> to document it. It's something I'm struggling a bit to see a
>>>> robust use case for that isn't better served by parsing sysfs,
>>>> what's the goal here?
>>> If this isn't something that should be in the Documentation/devicetree
>>> because it's not generig enough, where should Linux-specific
>>> interpretations such as this be documented?
>> I'm not clear that we want to document this at all since I am not clear
>> that there is a sensible use case for doing it. I did ask for one but
>> you've not articulated one in this reply. I am much less gung ho than
>> Grant on this one, even as a Linux specific interface it seems very
>> legacy.
> The time for the use case was when the patch was accepted.

I phrased that sentence poorly. A more clear wording is:
The time for the use case was when the source code patch
was accepted (commit bb29785e0d6d150181704be2efcc3141044625e2).

> It is in the kernel, it is appropriate to document it.
> -Frank