Thread (44 messages) 44 messages, 6 authors, 2016-05-30

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

From: Frank Rowand <hidden>
Date: 2016-05-25 00:18:40
Also in: linux-spi, lkml

On 5/24/2016 4:34 PM, Frank Rowand wrote:
On 5/24/2016 11:32 AM, Mark Brown wrote:
quoted
On Tue, May 24, 2016 at 08:03:48PM +0200, Christer Weinigel wrote:
quoted
On 05/24/2016 07:20 PM, Mark Brown wrote:
quoted
quoted
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?
quoted
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
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