tpm, tpm_tis: Only handle supported interrupts

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According to the TPM Interface Specification (TIS) support for "stsValid"
and "commandReady" interrupts is only optional.
This has to be taken into account when handling the interrupts in functions
like wait_for_tpm_stat(). To determine the supported interrupts use the
capability query.

Also adjust wait_for_tpm_stat() to only wait for interrupt reported status
changes. After that process all the remaining status changes by polling
the status register.

Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Tested-by: Michael Niewöhner <linux@mniewoehner.de>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>

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This commit is contained in:

Lino Sanfilippo 2022-11-24 14:55:30 +01:00 • committed by Jarkko Sakkinen

parent 15d7aa4e46

commit e87fcf0dc2

2 changed files with 73 additions and 48 deletions

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120

drivers/char/tpm/tpm_tis_core.c

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1

drivers/char/tpm/tpm_tis_core.h

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