From: Peter Meerwald <pmeerw@pmeerw.net>
Date: Sat, 2 Nov 2013 19:44:00 +0000 (+0000)
Subject: iio: Fix sign extension table in mcp3422 driver
X-Git-Tag: v3.13-rc2~16^2~4^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a5a3e43111e145aaaec4c60c927a8155b875890a;p=pandora-kernel.git

iio: Fix sign extension table in mcp3422 driver

the index argument to sign_extend32() gives the bit position (from 0)
to the sign bit

so e.g. if the measurement has 16-bit resolution, we need to pass 15;
a measurement of 0x8000 should be reported as -32768, not 32768

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Acked-by: Angelo Compagnucci <angelo.compagnucci@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
---

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