Adding spi slave support for imx8qm evaluation board with Yocto

[s233199]

Hello, I need to write an spi slave driver for an IMX8QuadMax evaluation board, using Yocto. I read that starting from kernel 4.13 Linux has also slave support in spi.c, but my board has an older version of the kernel. I wanted to know if I can update it to the needed version, and how. I am new to yocto and to driver development. Thank you in advance for your support!

[igorpadykov]

Hi Erica

i.MX8QuadMax processor is not officially launched and there is no full support for it yet.

One can try to add slave support using its driver sources on

spi-fsl-lpspi.c\spi\drivers - linux-imx - i.MX Linux kernel 

and slave software for this module from other processors software packages, like

EVKB-IMXRT1050 SDK..devices/MIMXRT1052/drivers/fsl_lpspi.c

Welcome | MCUXpresso SDK Builder 

or sect.4.LPSPI Slave Operation AN5320
https://www.nxp.com/docs/en/application-note/AN5320.pdf

Best regards
igor
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