linux-kernel - Re: [PATCH v2 3/4] i2c: imx: use readb_relaxed and writeb

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Message-ID: <ZtF2qj2cIjULy-RY@pengutronix.de>
Date: Fri, 30 Aug 2024 09:37:14 +0200
From: Oleksij Rempel <o.rempel@...gutronix.de>
To: Stefan Eichenberger <eichest@...il.com>
Cc: kernel@...gutronix.de, andi.shyti@...nel.org, shawnguo@...nel.org,
	s.hauer@...gutronix.de, festevam@...il.com, Frank.Li@....com,
	francesco.dolcini@...adex.com, linux-i2c@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Stefan Eichenberger <stefan.eichenberger@...adex.com>
Subject: Re: [PATCH v2 3/4] i2c: imx: use readb_relaxed and writeb_relaxed

On Mon, Aug 19, 2024 at 09:19:09AM +0200, Stefan Eichenberger wrote:
> From: Stefan Eichenberger <stefan.eichenberger@...adex.com>
> 
> Use the relaxed version of readb and writeb to reduce overhead. It is
> safe to use the relaxed version because we either do not rely on dma
> completion, or we use a dma callback to ensure that the dma transfer is
> complete before we continue.
> 
> Signed-off-by: Stefan Eichenberger <stefan.eichenberger@...adex.com>

Acked-by: Oleksij Rempel <o.rempel@...gutronix.de>

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