Re: [PATCH v3] tpm: do not suspend/resume if power stays on
From: Rob Herring
Date: Sun Mar 12 2017 - 10:33:31 EST
On Fri, Mar 03, 2017 at 05:09:59PM +0100, Enric Balletbo i Serra wrote:
> From: Sonny Rao <sonnyrao@xxxxxxxxxxxx>
> 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@xxxxxxxxxxxx>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
> Changes since v2:
> Jarkko Sakkinen
> - Add a new TPM_CHIP_FLAG_ALWAYS_POWERED flag instead of using a boolean variable.
> - Remove a trailing newline.
> Changes since v1:
> Jason Gunthorpe :
> - Move the code to handle suspend/resume in the common chip code.
> Documentation/devicetree/bindings/security/tpm/tpm-i2c.txt | 6 ++++++
I would say this shouldn't be TPM specific, but looks like we already
have a dts with this, so:
Acked-by: Rob Herring <robh@xxxxxxxxxx>
> drivers/char/tpm/tpm-interface.c | 3 +++
> drivers/char/tpm/tpm.h | 1 +
> drivers/char/tpm/tpm_of.c | 3 +++
> 4 files changed, 13 insertions(+)