This series enables interrupts for TPM. For this some obstacles had to be removed first, like the interrupt handler running in interrupt context and thus not allowing to access registers over SPI. Also the locality handling has been simplified to make a complicated synchronization between threads and irq handler unnecessary. As a side effect of this simplification a bug is fixed in which a TMP command is issued without a claimed locality in case of TPM 2. Another fix concerns the interrupt test which currently is broken. Finally the results of the capability query at startup is used to only set the interrupts which are actually supported by the hardware. These patches are based on Linux mainline V5.12 and tested on a SLB 9670 which uses TPM 2 via SPI. Of course any further testing is highly appreciated. 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 bug in case of TMP 2. PATCH 3: Fix and simplify the test for interrupts. PATCH 4: Only set the interrupts which are reported as being available. Changes in v2: - rebase against 5.12 - free irq on error path Lino Sanfilippo (4): tpm: Use a threaded interrupt handler tpm: Simplify locality handling tpm: Fix test for interrupts tpm: Only enable supported irqs drivers/char/tpm/tpm-chip.c | 40 ---------- drivers/char/tpm/tpm_tis_core.c | 170 +++++++++++++++++----------------------- drivers/char/tpm/tpm_tis_core.h | 2 +- include/linux/tpm.h | 5 +- 4 files changed, 72 insertions(+), 145 deletions(-) -- 2.7.4
