Re: TPM SPI issue

Hi Niek,

On Wed, Nov 29, 2023 at 9:51 AM niek.nooijens@omron.com niek.nooijens@omron.com wrote:

Hi there

I have the same issue as here: https://community.infineon.com/t5/OPTIGA-TPM/I-MX8-TPM-SLB9670-SPI-Com-Error...

apparently the CS is released in between responses. Can you help me solve this?

Which SoC are you using?

In case you are using drivers/spi/mxc_spi.c, there was a commit in the kernel driver that allowed to put the CS line in low when idle:

https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v...