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Thomas Petazzoni authored
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 <thomas.petazzoni@free-electrons.com> Link: https://lkml.kernel.org/r/1397483228-25625-8-git-send-email-thomas.petazzoni@free-electrons.comSigned-off-by:
Jason Cooper <jason@lakedaemon.net>
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