From: Michael Ellerman <michael@ellerman.id.au>
Date: Fri, 11 Oct 2013 03:07:58 +0000 (+1100)
Subject: hwrng: Add a driver for the hwrng found in power7+ systems
X-Git-Tag: omap-for-v3.13/fixes-for-merge-window-take2~19^2~66
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=66548e40583b1470300341c6784fdc5176f7609f;p=pandora-kernel.git

hwrng: Add a driver for the hwrng found in power7+ systems

Add a driver for the hwrng found in power7+ systems, based on the
existing code for the arch_get_random_long() hook.

We only register a single instance of the driver, not one per device,
because we use the existing per_cpu array of devices in the arch code.
This means we always read from the "closest" device, avoiding inter-chip
memory traffic.

Signed-off-by: Guo Chao <yan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

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