linux-kernel - Re: [PATCH v3 17/17] spi: s3c64xx: use bitfield access macros

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Date: Mon, 29 Jan 2024 16:42:22 +0000
From: Mark Brown <broonie@...nel.org>
To: Tudor Ambarus <tudor.ambarus@...aro.org>
Cc: Sam Protsenko <semen.protsenko@...aro.org>, andi.shyti@...nel.org,
	krzysztof.kozlowski@...aro.org, alim.akhtar@...sung.com,
	jassi.brar@...sung.com, linux-spi@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	andre.draszik@...aro.org, peter.griffin@...aro.org,
	kernel-team@...roid.com, willmcvicker@...gle.com
Subject: Re: [PATCH v3 17/17] spi: s3c64xx: use bitfield access macros

On Sat, Jan 27, 2024 at 03:44:24AM +0000, Tudor Ambarus wrote:
> On 1/27/24 03:38, Sam Protsenko wrote:

> >>>> -               val |= S3C64XX_SPI_MODE_BUS_TSZ_HALFWORD;
> >>>> -               val |= S3C64XX_SPI_MODE_CH_TSZ_HALFWORD;
> >>>> +               val |= FIELD_PREP(S3C64XX_SPI_MODE_BUS_TSZ_MASK,
> >>>> +                                 S3C64XX_SPI_MODE_BUS_TSZ_HALFWORD) |
> >>>> +                      FIELD_PREP(S3C64XX_SPI_MODE_CH_TSZ_MASK,
> >>>> +                                 S3C64XX_SPI_MODE_CH_TSZ_HALFWORD);

> >>> Two people complained it makes the code harder to read. Yet it's not
> >>> addressed in v3. Please see my comments for your previous submission
> >>> explaining what can be done, and also Andi's comment on that matter.

> >> I kept these intentionally. Please read my reply on that matter or the
> >> cover letter to this patch set.

> > I read it. But still don't like it 🙂 I'm sure it's possible to do
> > this modification, but at the same time keep the code clean an easy to
> > read. The code above -- I don't like at all, sorry. It was much better
> > before this patch, IMHO.

> Yeah, I guess Mark will tip the scale.

All other things being equal I tend to try not to get too involved with
minor coding style stuff in drivers.  People do seem to like
FIELD_PREP() but I have a hard time getting *too* excited.

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