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| author | Vadim Bendebury <vbendeb@chromium.org> | 2016-07-31 11:19:20 -0700 |
|---|---|---|
| committer | Vadim Bendebury <vbendeb@chromium.org> | 2016-08-03 20:07:40 +0200 |
| commit | 9e561f8e8087e0dc99e05f514c291da888085165 (patch) | |
| tree | 4224c1608bb78779dd172b58dffe6d2e1e70557d /Documentation | |
| parent | d1a00515ffc9ebe60994843eb3c7ef4b19e6181b (diff) | |
spi/tpm: read TPM version in larger chunks
The TPM version string has become much longer recently, and the
TPM_FW_VER register available on VID 1ae0 devices supports reading in
arbitrary size quantities.
Let's read 50 bytes at a time to reduce the SPI register read wrapper
overhead, and increase the length limit to 300 bytes to accommodate
longer version strings.
TEST=verified on the Kevin device:
localhost ~ # grep cr50 /sys/firmware/log
Firmware version: RO_A: 0.0.1/84e2dde7 RO_B:* 0.0.2/13eda43f RW_A:* cr50_v1.1.5005-444ddb7 RW_B: cr50_v1.1.5005-5aac83c
cr50_v1.1.5005-444ddb7 private-cr51:v0.0.66-bd9a0fe tpm2:v0.0.259-8f3d735 cryptoc:v0.0.4-5319e83 2016-07-31 10:58:05 vbendeb@kvasha
Change-Id: Ifaf28c1a9a3990372a9cec108c098edbe50d3243
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://review.coreboot.org/16000
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions