TPM: ACPI/PNP dependency removal

This patch pushes the ACPI dependency into the device driver code
itself. Now, even without ACPI/PNP enabled, the device can be registered
using the TIS specified memory space. This will however result in the
lack of access to the BIOS event log, being the only implication of such
ACPI removal.

Signed-off-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Acked-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
index f5fc64f89c5c..4dc338f3d1aa 100644
--- a/drivers/char/tpm/Kconfig
+++ b/drivers/char/tpm/Kconfig
@@ -17,14 +17,16 @@ menuconfig TCG_TPM
           obtained at: <http://sourceforge.net/projects/trousers>.  To 
           compile this driver as a module, choose M here; the module 
           will be called tpm. If unsure, say N.
-          Note: For more TPM drivers enable CONFIG_PNP, CONFIG_ACPI
+          Notes:
+          1) For more TPM drivers enable CONFIG_PNP, CONFIG_ACPI
           and CONFIG_PNPACPI.
+          2) Without ACPI enabled, the BIOS event log won't be accessible,
+          which is required to validate the PCR 0-7 values.
 
 if TCG_TPM
 
 config TCG_TIS
         tristate "TPM Interface Specification 1.2 Interface"
-        depends on PNP
         ---help---
           If you have a TPM security chip that is compliant with the
           TCG TIS 1.2 TPM specification say Yes and it will be accessible