On 11/05/2020 16:48:01+0200, Geert Uytterhoeven wrote: > I can connect whatever other system using SPI, i2c, CAN, or Ethernet ;-) > That doesn't mean I will directly program the other system's pin controller > over that link, using the standard (MMIO) pinctrl driver. > Yes, my point is that you can access all the SoC registers over SPI and so you will probably need to also control the pinctrl for example to be able to actually use the on-SoC switch. -- Alexandre Belloni, Bootlin Embedded Linux and Kernel engineering https://bootlin.com