From: Christian Lamparter <chunkeey@googlemail.com>
Date: Tue, 24 Aug 2010 21:29:05 +0000 (+0200)
Subject: p54: better rssi->dbm conversion for longbow phys
X-Git-Tag: v2.6.37-rc1~147^2~584^2^2~40
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=45f7e3116fad77e6dd15cb0e2eaccb7de7b806c9;p=pandora-kernel.git

p54: better rssi->dbm conversion for longbow phys

This patch should fix the dodgy signal and noise value
reports for most longbow (p54spi) users:

e.g.: (an older tcpdump extract)
> 2.0 Mb/s 2437 MHz (0x00a0) -49dB signal -41dB noise
> 1.0 Mb/s 2437 MHz (0x00a0) 4dB signal -41dB noise

The formula is taken from stlc45xx:
http://gitorious.org/stlc45xx/mainline/blobs/master/stlc45xx.c#line1199

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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