linux-kernel - Re: [PATCH 10/20] regmap: _regmap_raw_multi_reg_write: Add reg

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Message-ID: <20150812123923.GI10748@sirena.org.uk>
Date:	Wed, 12 Aug 2015 13:39:23 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Markus Pargmann <mpa@...gutronix.de>
Cc:	Jonathan Cameron <jic23@...nel.org>,
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, kernel@...gutronix.de
Subject: Re: [PATCH 10/20] regmap: _regmap_raw_multi_reg_write: Add
 reg_write() support

On Wed, Aug 12, 2015 at 12:12:35PM +0200, Markus Pargmann wrote:
> Define a fallback for busses which do not define a write() function.
> Instead we write one register at a time using reg_write().
> 
> Without this patch, _regmap_raw_multi_reg_write would break as it tries
> to call bus->write() without checking if it exists before.

Why are we trying to use multi write APIs in the first place if we can't
do raw I/O?

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