linux-kernel - Re: [PATCH v2 4/4] iio: veml3235: fix scale to conform to ABI

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Message-Id: <D6OY5V93Q2YC.S61HE5A0GMO1@gmail.com>
Date: Mon, 30 Dec 2024 11:01:57 +0100
From: "Javier Carrasco" <javier.carrasco.cruz@...il.com>
To: "Matti Vaittinen" <mazziesaccount@...il.com>, "Jonathan Cameron"
 <jic23@...nel.org>, "Lars-Peter Clausen" <lars@...afoo.de>
Cc: <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>, "Jonathan
 Cameron" <Jonathan.Cameron@...wei.com>
Subject: Re: [PATCH v2 4/4] iio: veml3235: fix scale to conform to ABI

On Sun Dec 29, 2024 at 7:53 AM CET, Matti Vaittinen wrote:
> On 24/12/2024 12:59, Javier Carrasco wrote:
> > The current scale is not ABI-compliant as it is just the sensor gain
> > instead of the value that acts as a multiplier to be applied to the raw
> > value (there is no offset).
> >
> > Use the iio-gts helpers to obtain the proper scale values according to
> > the gain and integration time to match the resolution tables from the
> > datasheet. When at it, use 'scale' instead of 'gain' consistently for
> > the get/set functions to avoid misunderstandings.
> >
> > Fixes: c5a23f80c164 ("iio: light: add support for veml3235")
> > Signed-off-by: Javier Carrasco <javier.carrasco.cruz@...il.com>
> > ---
>
> This looks good to me, although I now think we made a mistake with the
> naming of the iio_gts_find_gain_sel_in_times().
>
> The intended use is finding the gain and time (selector) for the new
> scale (while preferring keeping the time unchanged if possible), right?
>
> So, in this regard it'd be better to use name which reflects the fact
> that the function finds gain and time for given scale.
>
> I would now (after having to look the doc of this new function while
> reviewing the code 2 weeks after reviewing this new function :rolleyes:)
> name it something like:
>
> iio_gts_find_gain_time_sel_for_scale()
>
> Well, it's not really in the scope of the review anymore, but I'd love
> to see a renaming patch while we have only one user... :)
>
> Anyways:
>
> Reviewed-by: Matti Vaittinen <mazziesaccount@...il.com>
>
> Yours,
> 	-- Matti

Hi Matti,

Thank you for your suggestion, I will add it to v3 as this patch and the
one that introduced the helper functions have not been applied yet, so
we don't need an extra patch to rename the function. I will add your
tag too because I will only change what you suggested.

Best regards,
Javier Carrasco