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authorJason Gunthorpe <jgunthorpe@obsidianresearch.com>2014-05-22 04:26:44 +0400
committerPeter Huewe <peterhuewe@gmx.de>2014-07-30 01:10:56 +0400
commit8e54caf407b98efa05409e1fee0e5381abd2b088 (patch)
tree690ed020c643ca869e5fc27686d518cb3a9f5f1e /include/linux/tpm.h
parent3e14d83ef94a5806a865b85b513b4e891923c19b (diff)
downloadlinux-8e54caf407b98efa05409e1fee0e5381abd2b088.tar.xz
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>
Diffstat (limited to 'include/linux/tpm.h')
-rw-r--r--include/linux/tpm.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/tpm.h b/include/linux/tpm.h
index fff1d0976f80..8350c538b486 100644
--- a/include/linux/tpm.h
+++ b/include/linux/tpm.h
@@ -39,6 +39,9 @@ struct tpm_class_ops {
int (*send) (struct tpm_chip *chip, u8 *buf, size_t len);
void (*cancel) (struct tpm_chip *chip);
u8 (*status) (struct tpm_chip *chip);
+ bool (*update_timeouts)(struct tpm_chip *chip,
+ unsigned long *timeout_cap);
+
};
#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)