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: <20230501172151.4a4b6dce@jic23-huawei>
Date:   Mon, 1 May 2023 17:21:51 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Marijn Suijten <marijn.suijten@...ainline.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 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.

Thanks,

Jonathan

> 
> - Marijn