From fa2dbe2e0fcf2cda8fc56845e475b617385b1ec6 Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Tue, 3 Jun 2014 20:07:39 +1000
Subject: [PATCH] powerpc/powernv: Provide debugfs access to the LPC bus via
 OPAL

This provides debugfs files to access the LPC bus on Power8
non-virtualized using the appropriate OPAL firmware calls.

The usage is simple: one file per space (IO, MEM and FW),
lseek to the address and read/write the data. IO and MEM always
generate series of byte accesses. FW can generate word and dword
accesses if aligned properly.

Based on an original patch from Rob Lippert and reworked.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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