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Date: Fri, 13 Dec 2013 10:22:52 +0000
From: Mark Brown <broonie@kernel.org>
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On Thu, Dec 12, 2013 at 09:54:50PM +0100, Linus Walleij wrote:

> This is a reimplementation of regmap for MMIO.
> See drivers/base/regmap/regmap-mmio.c
> Notice how regmap_update_bits() is used throughout the
> kernel.

> If you want to do this, use regmap.

Or if this is very performance sensitive (which I'd not expect for
pinctrl) there's a helper in review at the minute which just uses a
spinlock.

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