[PATCH] tpm_infineon: Support for new TPM 1.2 and PNPACPI

This patch includes support for the new Infineon Trusted Platform Module
SLB 9635 TT 1.2 and does further include ACPI-support for both chip
versions (SLD 9630 TT 1.1 and SLB9635 TT 1.2).  Since the ioports and
configuration registers are not correctly set on some machines, the
configuration is now done via PNPACPI, which reads out the correct values
out of the DSDT-table.  Note that you have to have CONFIG_PNP,
CONFIG_ACPI_BUS and CONFIG_PNPACPI enabled to run this driver (assuming
that mainboards including a TPM do have the need for ACPI anyway).

Signed-off-by: Marcel Selhorst <selhorst@crypto.rub.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 7 insertions, 4 deletions

diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
index 94a3b3e20bf9..79e9832ef1f3 100644
--- a/drivers/char/tpm/Kconfig
+++ b/drivers/char/tpm/Kconfig
@@ -17,6 +17,8 @@ config 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_BUS
+          and CONFIG_PNPACPI.
 
 config TCG_NSC
         tristate "National Semiconductor TPM Interface"
@@ -36,12 +38,13 @@ config TCG_ATMEL
           as a module, choose M here; the module will be called tpm_atmel.
 
 config TCG_INFINEON
-        tristate "Infineon Technologies SLD 9630 TPM Interface"
-        depends on TCG_TPM
+        tristate "Infineon Technologies TPM Interface"
+        depends on TCG_TPM && PNPACPI
         ---help---
           If you have a TPM security chip from Infineon Technologies
-          say Yes and it will be accessible from within Linux.  To
-          compile this driver as a module, choose M here; the module
+          (either SLD 9630 TT 1.1 or SLB 9635 TT 1.2) say Yes and it
+          will be accessible from within Linux.
+          To compile this driver as a module, choose M here; the module
           will be called tpm_infineon.
           Further information on this driver and the supported hardware
           can be found at http://www.prosec.rub.de/tpm