From 75a973c7546ffae3b3c3fdb22211f1f59c01b0fa Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <jic23@kernel.org>
Date: Sun, 15 Apr 2012 17:41:30 +0100
Subject: [PATCH] staging:iio: Make read / write attributes for channel values
 optional.

Until now all channels have had read/write attributes. This patch
allows for channels where we can't actually read the value (or for
output devices, write it!)

v2 introduces separate elements for processed and raw thus removing
some special case code from the core.  Thanks to Lars-Peter for an
excellent suggestion!

Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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