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| author | Enric Balletbo i Serra <enric.balletbo@collabora.com> | 2017-06-27 12:27:24 +0200 |
|---|---|---|
| committer | James Morris <james.l.morris@oracle.com> | 2017-07-07 01:49:26 +0200 |
| commit | b5d0ebc99bf5d0801a5ecbe958caa3d68b8eaee8 (patch) | |
| tree | 82e09dabb210db95c61786f2dc981c616adeb12c /drivers/char/tpm/tpm_of.c | |
| parent | tpm: use tpm2_pcr_read() in tpm2_do_selftest() (diff) | |
| download | linux-b5d0ebc99bf5d0801a5ecbe958caa3d68b8eaee8.tar.xz linux-b5d0ebc99bf5d0801a5ecbe958caa3d68b8eaee8.zip | |
tpm: do not suspend/resume if power stays on
The suspend/resume behavior of the TPM can be controlled by setting
"powered-while-suspended" in the DTS. This is useful for the cases
when hardware does not power-off the TPM.
Signed-off-by: Sonny Rao <sonnyrao@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/char/tpm/tpm_of.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm_of.c b/drivers/char/tpm/tpm_of.c index de57d4ac8901..aadb7f464076 100644 --- a/drivers/char/tpm/tpm_of.c +++ b/drivers/char/tpm/tpm_of.c @@ -36,6 +36,9 @@ int tpm_read_log_of(struct tpm_chip *chip) else return -ENODEV; + if (of_property_read_bool(np, "powered-while-suspended")) + chip->flags |= TPM_CHIP_FLAG_ALWAYS_POWERED; + sizep = of_get_property(np, "linux,sml-size", NULL); basep = of_get_property(np, "linux,sml-base", NULL); if (sizep == NULL && basep == NULL) |