** Changed in: linux (Ubuntu Disco)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1826142
Title:
TPM module can not initial
Status in linux package in Ubuntu:
Confirmed
Status in linux source package in Disco:
Fix Committed
Bug description:
[Impact]
TPM module can not initial with Ubuntu kernel
[ 28.138216] tpm tpm0: tpm_relinquish_locality: : error -1
[ 28.143808] tpm_tis_spi spi-SMO0768:00: 1.2 TPM (device-id 0xFFFF, rev-id
255)
[ 28.145025] tpm tpm0: tpm_try_transmit: tpm_send: error -5
[ 28.899522] tpm tpm0: tpm_relinquish_locality: : error -1
[ 28.904927] tpm tpm0: A TPM error (-5) occurred attempting to determine the
timeouts
[ 28.913026] tpm_tis_spi: probe of spi-SMO0768:00 failed with error -5
We have a TPM module but disco kernel can not initial it. The root cause is
DW SPI driver in disco only support chipselect from device-tree and for 5.1
mainline kernel it can be used with deivce-tree or ACPI.
[Test Case]
Boot Ubuntu on platform with TPM module and ACPI and `dmesg | grep tpm`
[Fix]
9400c41e77b8 [email protected] 2019-01-09 12:42:18 +0000 spi: dw:
Convert to use CS GPIO descriptors
f3186dd87669 [email protected] 2019-01-09 12:39:25 +0000 spi:
Optionally use GPIO descriptors for CS GPIOs
[Regression Risk]
Reading first 2 patches for determining regression risk and find out only
machine with Designware MMIO SPI and device-tree have risk. Fortunately on
mainline kernel we have Jan Kotas tested and report several regressions e.g.
default polarity.
Therefore, another 4 patches is needed to fix the regression on device-tree
machines with DW SPI and that's the only regression risk.
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