linux-kernel - Re: [PATCH 1/2] iio: core: Support removing extended name in attribute filename

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Message-ID: <20210610141057.00007361@Huawei.com>
Date:   Thu, 10 Jun 2021 14:10:57 +0100
From:   Jonathan Cameron <Jonathan.Cameron@...wei.com>
To:     Paul Cercueil <paul@...pouillou.net>
CC:     Andy Shevchenko <andy.shevchenko@...il.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich <michael.hennerich@...log.com>,
        linux-iio <linux-iio@...r.kernel.org>,
        "Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] iio: core: Support removing extended name in
 attribute filename

On Thu, 10 Jun 2021 14:05:53 +0100
Paul Cercueil <paul@...pouillou.net> wrote:

> Hi Andy,
> 
> Le jeu., juin 10 2021 at 15:58:51 +0300, Andy Shevchenko 
> <andy.shevchenko@...il.com> a écrit :
> > On Thu, Jun 10, 2021 at 3:47 PM Paul Cercueil <paul@...pouillou.net> 
> > wrote:  
> >> 
> >>  By default, when a channel has an extended name, it will appear in 
> >> the
> >>  filename of channel attributes. E.g. if the extended name is "aux", 
> >> the
> >>  filename of a "sample_rate" attribute will be something like:
> >>  in_voltage0_aux_sample_rate
> >> 
> >>  Add a mechanism to disable this feature. This will be used to add a
> >>  "extended_name" channel attribute.  
> > 
> > I'm afraid, NAK. Otherwise, please put an explanation that clearly
> > shows that it will be no ABI breakage.
> > I.o.w. users for the existing drivers and devices will always get
> > those attributes at the same platform configuration(s).  
> 
> Well, the commit message says that I'm adding a mechanism to disable 
> the feature. If it was actually doing anything else (like actually 
> disabling it for any attribute) then I'd mention it in the commit 
> message.
> 
> I don't see how that possibly can be a ABI breakage.

Ah.  Both Andy and I got taken in by 'removing' in the title.
What you really mean is identifying the extended name.   That's
much more acceptable :)

Jonathan

> 
> -Paul
> 
>