[PATCH 0/4] Fixes for TPM interrupt handling
From: Lino Sanfilippo
Date: Sun Feb 21 2021 - 19:59:06 EST
This series fixes issues around the TPM driver interrupt handling. These
issues prevent TPM chips like the SLB 9670 to work over SPI.
PATCH 1: The SPI implementation of the functions to read/write to/from
registers uses mutexes and thus require a sleepable context. For this
reason request a threaded interrupt handler.
PATCH 2: Simplify locality handling by taking the driver locality (0) at
driver startup and releasing it at driver shutdown. This also fixes a
warning at driver startup that is caused by a register access without prior
locality request.
PATCH 3: Fix and simplify the test for working interrupts.
PATCH 4: Only set the interrupts which are reported as being available.
With these patches applied the SLB 9670 works as expected: interrupts are
detected and the transmit/receive operations are controlled by interrupt
handling.
The patches are based on Linux mainline V5.11
Lino Sanfilippo (4):
tpm: Use a threaded interrupt handler
tpm: get locality before writing to TPM chip
tpm: Fix test for interrupts
tpm: Only enable supported irqs
drivers/char/tpm/tpm-chip.c | 10 ----
drivers/char/tpm/tpm_tis_core.c | 127 +++++++++++++++++++---------------------
drivers/char/tpm/tpm_tis_core.h | 2 +-
include/linux/tpm.h | 2 +-
4 files changed, 62 insertions(+), 79 deletions(-)
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2.7.4