From: Oliver Hartkopp <socketcan@hartkopp.net>
Date: Wed, 28 Sep 2011 02:50:11 +0000 (+0000)
Subject: candev: allow SJW user setting for bittiming calculation
X-Git-Tag: v3.2-rc1~129^2~195
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2e1143742789463c00ed5e7f9bf471f2b707b493;p=pandora-kernel.git

candev: allow SJW user setting for bittiming calculation

This patch adds support for SJW user settings to not set the synchronization
jump width (SJW) to 1 in any case when using the in-kernel bittiming
calculation.

The ip-tool from iproute2 already supports to pass the user defined SJW
value. The given SJW value is sanitized with the controller specific sjw_max
and the calculated tseg2 value. As the SJW can have values up to 4 providing
this value will lead to the maximum possible SJW automatically. A higher SJW
allows higher controller oscillator tolerances.

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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