Is it possible to control the strength of spi signals in the i.mx8qxp software?

[sangkwon-lee]

Hello seniors!

Is it possible to control the drive strength of SPI signals in software in i.mx8qxp?
Other signals seem to be able to control the signal strength by software, but I do not know how to use SPI signals.
Anyone know?
Thank you in advance.

[igorpadykov]

Hi SANG

drive strength of spi signals is defined by bit PDRV (drive) which can be found for example in

sect.9.2.5.1.101 SPI0_SCK (SPI0_SCK)  i.MX 8DualXPlus/8QuadXPlus Applications Processor Reference Manual

this register value corresponds to pinctrl_lpspi0: lpspi0grp {..  in imx8qxp-lpddr4-val-lpspi.dts

https://source.codeaurora.org/external/imx/linux-imx/tree/arch/arm64/boot/dts/freescale/imx8qxp-lpdd...

Best regards
igor