linux-kernel - Re: [RFC PATCH 0/2] Support for Avago APDS9306 Ambient Light Sensor

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Date:   Wed, 12 Apr 2023 21:44:03 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Subhajit Ghosh <subhajit.ghosh@...aklogic.com>
Cc:     Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Shreeya Patel <shreeya.patel@...labora.com>,
        Paul Gazzillo <paul@...zz.com>,
        Zhigang Shi <Zhigang.Shi@...eon.com>,
        Dmitry Osipenko <dmitry.osipenko@...labora.com>
Subject: Re: [RFC PATCH 0/2] Support for Avago APDS9306 Ambient Light Sensor

On Wed, 12 Apr 2023 12:46:49 +0800
Subhajit Ghosh <subhajit.ghosh@...aklogic.com> wrote:

> Hi Jonathan,
> Thank you for getting back.
> 
> > Hi Subhajit,
> > 
> > No need to sign off a cover letter.  The content isn't captured in the
> > git tree anyway.
> > 
> > For an RFC, I'd expect to see a clear statement in the cover letter of
> > why it is an RFC rather than a formal patch submission.  What specifically
> > are you looking for comments on?
> > 
> > Point us in the right direction and we might answer the questions quicker.
> > 
> > Thanks,
> > 
> > Jonathan  
> Thank you for clearing it up.
> Next version of RFC I will put specific reasons.
> Before submitting a formal patch I wanted to check if my implementation of
> single reads of ALS data raw values from userspace when interrupts are
> enabled is the right thing to do or not. Also wanted to check if my event
> related userspace ABI implementation is in line with IIO subsystem.
> I will put it into better words in the next cover letter.
> 
> Can you also help me out with the git tree I should use to format the
> patches? As per my understanding it is the subsystem maintainer tree
> and the main branch but the macros and functions which you have suggested
> in other reviews are available in Linux mainline.

For a new driver it rarely matters and I'd advise simply using
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
which is the mainline tree.  Please base either on the previous
release (currently 6.2) or rc1 of the current release (v6.3-rc1)
if doing this.

If you need a feature that has only been applied in the same cycle, or
are building on recent work that has been applied to the iio tree then
for fixes you want:
https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git fixes-togreg
for new stuff you want:
https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg

The IIO tree routes through Greg KH's char-misc tree so will see the togreg
branch move forwards to be based on that as Greg takes pull requests from me.
Usually this happens once or twice a kernel cycle.  Don't worry too much about
this. If it should affect a patch because some changes crossed I'll generally
fix it up whilst applying whichever gets applied second and ask the
authors to check I didn't make a mistake.

Joanthan
> 
> Regards,
> Subhajit Ghosh
>