> I am working with on Infineon SLB9670 TPM 2.0 on SPI. > > How well is this chip supported in the mainline kernel?
Unfortunately, due to some small bugs, tpm_tis_spi in mainline is not yet compatible with this device. Starting with 4.12 it should be properly supported. > I am currently using the linux-socfpga kernel (version 4.8.0; branch > socfpga-4.8) [1] > on which I applied the following patches from patchwork: > > aacabbe0d5ec tpm_tis_spi: Add small delay after last transfer [2] > a4a011be786f tpm_tis_spi: Remove limitation of transfers to > MAX_SPI_FRAMESIZE bytes [3] > 840157e08b2f tpm_tis_spi: Check correct byte for wait state indicator [4] > 10cb31aec536 tpm_tis_spi: Abort transfer when too many wait states are > signaled [5] > 3ad7d9172a8c tpm_tis_spi: Use single function to transfer data [6] > 4a809ec34a0f tpm_tis_core: Choose appropriate timeout for reading > burstcount [7] > > With these patches, I can read the Vendor ID properly. Those are all the patches that I needed on a Raspberry Pi 2 for the device to work correctly. I did not use 4.8 though, but worked with 4.10. > But, the driver initialization fails in the tpm2_probe function. Could you be more specific? What exactly fails? What data is transferred to/from the TPM when it fails? Alexander ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ tpmdd-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/tpmdd-devel
