linux-kernel - Re: [PATCH] spi: Mediatek: fix endian warnings

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Message-ID: <20150817033047.GM10748@sirena.org.uk>
Date:	Sun, 16 Aug 2015 20:30:47 -0700
From:	Mark Brown <broonie@...nel.org>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	Arnd Bergmann <arnd@...db.de>, Leilk Liu <leilk.liu@...iatek.com>,
	Mark Rutland <mark.rutland@....com>,
	devicetree@...r.kernel.org, Sascha Hauer <s.hauer@...gutronix.de>,
	linux-kernel@...r.kernel.org, linux-spi@...r.kernel.org,
	linux-mediatek@...ts.infradead.org,
	Matthias Brugger <matthias.bgg@...il.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] spi: Mediatek: fix endian warnings

On Sun, Aug 16, 2015 at 03:06:39PM +0100, Russell King - ARM Linux wrote:

> All writel() implementations take a CPU number and write it in little
> endian format.  Hence, writel() almost always uses cpu_to_le32()
> internally.

I think the reason this keeps coming up is that people aren't expecting
writel() to be doing endianness conversion, it's easy to get caught out
by it.

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