hw_random: add support for the TPM chip as a hardware RNG source

This driver will make use of any available TPM chip on the system as a
hwrng source.

Acked-by: David Safford <safford@linux.vnet.ibm.com>
Signed-off-by: Kent Yoder <key@linux.vnet.ibm.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
index 7c0d391996b5..fbd9b2b850ef 100644
--- a/drivers/char/hw_random/Kconfig
+++ b/drivers/char/hw_random/Kconfig
@@ -289,3 +289,16 @@ config HW_RANDOM_EXYNOS
           module will be called exynos-rng.
 
           If unsure, say Y.
+
+config HW_RANDOM_TPM
+        tristate "TPM HW Random Number Generator support"
+        depends on HW_RANDOM && TCG_TPM
+        default HW_RANDOM
+        ---help---
+          This driver provides kernel-side support for the Random Number
+          Generator in the Trusted Platform Module
+
+          To compile this driver as a module, choose M here: the
+          module will be called tpm-rng.
+
+          If unsure, say Y.