linux-kernel - Re: [RFC PATCH v2 0/5] iio: adc: qcom-spmi-vadc: Propagate fw node label to userspace

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Message-ID: <jj7taer4qk5whekl5tugkgdlmmxsokihxd2ay33ikvhhkig5uc@zgd4phhyb4zr>
Date:   Tue, 2 May 2023 01:20:45 +0200
From:   Marijn Suijten <marijn.suijten@...ainline.org>
To:     Jonathan Cameron <jic23@...nel.org>
Cc:     phone-devel@...r.kernel.org, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        ~postmarketos/upstreaming@...ts.sr.ht,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Martin Botka <martin.botka@...ainline.org>,
        Jami Kettunen <jami.kettunen@...ainline.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        linux-arm-msm@...r.kernel.org, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v2 0/5] iio: adc: qcom-spmi-vadc: Propagate fw node
 label to userspace

On 2023-05-01 17:21:51, Jonathan Cameron wrote:
> On Mon, 23 Jan 2023 00:41:37 +0100
> Marijn Suijten <marijn.suijten@...ainline.org> wrote:
> 
> > On 2023-01-22 16:59:47, Jonathan Cameron wrote:
> > > On Mon, 16 Jan 2023 23:09:04 +0100
> > > Marijn Suijten <marijn.suijten@...ainline.org> wrote:
> > >   
> > > > Implement read_label in qcom-spmi-vadc to see DT-specified label names
> > > > in userspace.  At the same time clear up some documentation around
> > > > extend_name to promote read_label, and normalize similar code in
> > > > qcom-spmi-adc5.
> > > >   
> > > 
> > > I think this is a good route forwards, but it is making changes
> > > to ABI so I definitely want input on this from at least one of
> > > the qualcomm maintainers before I pick it up - particularly
> > > the changes in patch 3.
> > > 
> > > Don't want to cause anyone nasty surprises.  
> > 
> > Ack, patch 3 is the odd one of the bunch (as discussed many times
> > prior).  It is an ABI break and would effectively obsolete "iio: adc:
> > qcom-spmi-adc5: Fix the channel name" [1] as it then only affects a few
> > dev_err/dev_dbg.  Let's wait and hear from Qcom maintainers.
> > 
> > [1]: https://lore.kernel.org/linux-arm-msm/20230118100623.42255-1-andriy.shevchenko@linux.intel.com/
> 
> Perhaps time for a resend of this series (drop the RFC marking as that
> tends to mean people don't read things if they are low on time).
> 
> I'm going to mark this in patchwork as changes requested on basis a
> v3 will show up shortly.

v3 is out now after once again messing with b4 to import an older
series, with a RESEND to include all the email addresses which b4 only
addes after using prep --auto-to-cc, and there not being any obvious way
to retroactively add the bunch of To:/Cc: commands to a previously sent
version before running b4 send --resend v3.

Fingers crossed it all went right and reaches the right people.

- Marijn