linux-kernel - Re: [PATCH v2 8/9] spi: spi-s3c64xx: Increase transfer timeout

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Date:   Sat, 22 Aug 2020 14:43:56 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Łukasz Stelmach <l.stelmach@...sung.com>
Cc:     Kukjin Kim <kgene@...nel.org>, Andi Shyti <andi@...zian.org>,
        Mark Brown <broonie@...nel.org>, linux-spi@...r.kernel.org,
        linux-samsung-soc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        m.szyprowski@...sung.com, b.zolnierkie@...sung.com
Subject: Re: [PATCH v2 8/9] spi: spi-s3c64xx: Increase transfer timeout

On Fri, Aug 21, 2020 at 06:14:00PM +0200, Łukasz Stelmach wrote:
> Increase timeout by 30 ms for some wiggle and set the minimum value to
> 100 ms. This ensures a non-zero value for short transfers which
> may take less than 1 ms. The timeout value does not affect
> performance because it is used with a completion.
> 
> Similar formula is used in other drivers e.g. sun4i, sun6i.
> 
> Signed-off-by: Łukasz Stelmach <l.stelmach@...sung.com>
> ---
>  drivers/spi/spi-s3c64xx.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)

Reviewed-by: Krzysztof Kozlowski <krzk@...nel.org>

Best regards,
Krzysztof