From: Kleber Sacilotto de Souza <klebers@linux.vnet.ibm.com>
Date: Fri, 17 Jan 2014 13:56:52 +0000 (-0200)
Subject: powerpc/pseries: Add Gen3 definitions for PCIE link speed
X-Git-Tag: v3.14-rc4~40^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=49d9684a54d21930372b7fb0d3d7b5617f621706;p=pandora-kernel.git

powerpc/pseries: Add Gen3 definitions for PCIE link speed

Rev3 of the PCI Express Base Specification defines a Supported Link
Speeds Vector where the bit definitions within this field are:

Bit 0 - 2.5 GT/s
Bit 1 - 5.0 GT/s
Bit 2 - 8.0 GT/s

This vector definition is used by the platform firmware to export the
maximum and current link speeds of the PCI bus via the
"ibm,pcie-link-speed-stats" device-tree property.

This patch updates pseries_root_bridge_prepare() to detect Gen3
speed buses (defined by 0x04).

Signed-off-by: Kleber Sacilotto de Souza <klebers@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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