From: Thomas Petazzoni Date: Mon, 14 Apr 2014 13:47:05 +0000 (+0200) Subject: ARM: mvebu: implement Armada 375 coherency workaround X-Git-Tag: omap-for-v3.16/fixes-against-rc1~52^2~16^2~32 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5ab5afd8ba837560f76f8ee527271d2e819bcaef;p=pandora-kernel.git ARM: mvebu: implement Armada 375 coherency workaround The early revisions of Armada 375 SOCs (Z1 stepping) have a bug in the I/O coherency unit that prevents using the normal method for the I/O coherency barrier. The recommended workaround is to use a XOR memset transfer to act as the I/O coherency barrier. This involves "borrowing" a XOR engine, which gets disabled in the Device Tree so the normal XOR driver doesn't use it. Signed-off-by: Thomas Petazzoni Link: https://lkml.kernel.org/r/1397483228-25625-8-git-send-email-thomas.petazzoni@free-electrons.com Signed-off-by: Jason Cooper --- Reading git-diff-tree failed