topic Re: imx8qxp u-boot spi driver support in i.MX Processors

imx8qxp u-boot spi driver support

rutvij_trivedi — Mon, 10 Aug 2020 07:23:52 GMT

Hi,
I am working with imx8qxp , i am using yocto(sumo) setup with u-boot version imx_v2018.03_4.14.78_1.0.0_ga.
I want to enable security chip which is using normal SPI interface.

I am able to bring up this IC from kernel using LPSPI.

When i looked at the u-boot source i was not able find any lpspi driver and below are available drivers in my source tree.

So how do i use normal spi bus driver on imx8qxp in u-boot-2018 ?

Any help would be greatly appreciable.

Thanks & Regards,
Rutvij

Re: imx8qxp u-boot spi driver support

joanxie — Thu, 13 Aug 2020 07:23:18 GMT

one can refer to the kernel device tree file:

fsl-imx8qxp-lpddr4-arm2-lpspi.dts\freescale\dts\boot\arm64\arch - linux-imx - i.MX Linux kernel

Re: imx8qxp u-boot spi driver support

rutvij_trivedi — Thu, 13 Aug 2020 08:14:21 GMT

Hi ,
Thank for the reply,
But i think you should read the question again , as it says "I am able to bring up this IC from kernel using LPSPI." and the concern is related to u-boot and not the kernel.
LPSPI driver and its DTS configuration seems not available in the u-boot source(?).

So how do i enable imx8qxp LPSPI or normal SPI in u-boot source ?

Thanks.

Re: imx8qxp u-boot spi driver support

rutvij_trivedi — Mon, 17 Aug 2020 09:08:17 GMT

Hi,

Thanks fr the reply.
As the link suggested, there should be compatible driver available in the same repo, but when looked at it unfortunately i was unable to find the compatible driver here as well as in my repo after switching to the same branch.
spi\drivers - uboot-imx - i.MX U-Boot . (same link provided as above, but directory is driver)
I could add compatible string in spidev.c but it also does not seem available
I could find lpspi driver node in dts file but can not find any compatible "fsl,imx7ulp-spi" driver in source.

Also the dts file you suggested is for imx8qm devices but i m using imx8qxp, will this work for both ?

Is there anything i am missing here ?
Can you please verify at your end ?

Thanks

Re: imx8qxp u-boot spi driver support

rutvij_trivedi — Tue, 18 Aug 2020 11:31:59 GMT

Hi,
Any chance to review the availability of SPI bus driver in u-boot source ?

Thanks

Re: imx8qxp u-boot spi driver support

joanxie — Wed, 26 Aug 2020 07:49:34 GMT

got the reply from expert team:

"There is no LSPI driver for 8X/8 in u-boot."