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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 09:49:26 +1000 |
| commit | b5d0ebc99bf5d0801a5ecbe958caa3d68b8eaee8 (patch) | |
| tree | 82e09dabb210db95c61786f2dc981c616adeb12c /drivers/char/tpm/tpm-interface.c | |
| parent | 28707bf221ce6914a3e414637c8ffc4d27e9648d (diff) | |
| download | op-kernel-dev-b5d0ebc99bf5d0801a5ecbe958caa3d68b8eaee8.zip op-kernel-dev-b5d0ebc99bf5d0801a5ecbe958caa3d68b8eaee8.tar.gz | |
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 'drivers/char/tpm/tpm-interface.c')
| -rw-r--r-- | drivers/char/tpm/tpm-interface.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index 3123a6e..fe597e6 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -1119,6 +1119,9 @@ int tpm_pm_suspend(struct device *dev) if (chip == NULL) return -ENODEV; + if (chip->flags & TPM_CHIP_FLAG_ALWAYS_POWERED) + return 0; + if (chip->flags & TPM_CHIP_FLAG_TPM2) { tpm2_shutdown(chip, TPM2_SU_STATE); return 0; |
