linux-kernel - Re: [RFC 04/25] spi: gpio: Implement LSB First bitbang support

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Message-ID: <20191213114231.GC4644@sirena.org.uk>
Date:   Fri, 13 Dec 2019 11:42:31 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Andreas Färber <afaerber@...e.de>
Cc:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        linux-realtek-soc@...ts.infradead.org, linux-leds@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-spi <linux-spi@...r.kernel.org>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Pavel Machek <pavel@....cz>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Dan Murphy <dmurphy@...com>
Subject: Re: [RFC 04/25] spi: gpio: Implement LSB First bitbang support

On Thu, Dec 12, 2019 at 10:08:24PM +0100, Andreas Färber wrote:
> Am 12.12.19 um 18:19 schrieb Mark Brown:

> >>>> Duplicate the inline helpers bitbang_txrx_be_cpha{0,1} as LE versions.
> >>>> Make checkpatch.pl happy by changing "unsigned" to "unsigned int".

> > Separate patch for this?

> For the checkpatch cleanup? Or helpers preparation vs. spi-gpio.c usage?

At least the checkpatch cleanup.

> > Yeah, I don't think there's any great options here with the potential
> > performance issues - probably the nicest thing would be to autogenerate
> > lots of variants but I think that's far more trouble than it's worth.

> Maybe add another code comment to revisit that idea later then?

Sure, if you like.

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