tpm: Provide a generic means to override the chip returned timeouts
authorJason Gunthorpe <jgunthorpe@obsidianresearch.com>
Thu, 22 May 2014 00:26:44 +0000 (18:26 -0600)
committerPeter Huewe <peterhuewe@gmx.de>
Tue, 29 Jul 2014 21:10:56 +0000 (23:10 +0200)
commit8e54caf407b98efa05409e1fee0e5381abd2b088
tree690ed020c643ca869e5fc27686d518cb3a9f5f1e
parent3e14d83ef94a5806a865b85b513b4e891923c19b
tpm: Provide a generic means to override the chip returned timeouts

Some Atmel TPMs provide completely wrong timeouts from their
TPM_CAP_PROP_TIS_TIMEOUT query. This patch detects that and returns
new correct values via a DID/VID table in the TIS driver.

Tested on ARM using an AT97SC3204T FW version 37.16

Cc: <stable@vger.kernel.org>
[PHuewe: without this fix these 'broken' Atmel TPMs won't function on
older kernels]
Signed-off-by: "Berg, Christopher" <Christopher.Berg@atmel.com>
Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
drivers/char/tpm/tpm-interface.c
drivers/char/tpm/tpm_tis.c
include/linux/tpm.h