tree f8025f7e31ea5eab9db246107cba82651bd0eb36
parent a4da0d50b2a00b79390092e6248ca88b7d93c81d
author Michael Ellerman <michael@ellerman.id.au> 1381460878 +1100
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> 1381470620 +1100

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>