powerpc/pseries/hwrng: PFO-based hwrng driver

Adds support for the Platform Facilities Option (PFO)-based hardware
random number generator for POWER hardware.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com>
Signed-off-by: Kent Yoder <key@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
index 0689bf6b0183..9355347fa0f5 100644
--- a/drivers/char/hw_random/Kconfig
+++ b/drivers/char/hw_random/Kconfig
@@ -250,3 +250,16 @@ config UML_RANDOM
           (check your distro, or download from
           http://sourceforge.net/projects/gkernel/).  rngd periodically reads
           /dev/hwrng and injects the entropy into /dev/random.
+
+config HW_RANDOM_PSERIES
+        tristate "pSeries HW Random Number Generator support"
+        depends on HW_RANDOM && PPC64 && IBMVIO
+        default HW_RANDOM
+        ---help---
+          This driver provides kernel-side support for the Random Number
+          Generator hardware found on POWER7+ machines and above
+
+          To compile this driver as a module, choose M here: the
+          module will be called pseries-rng.
+
+          If unsure, say Y.