I have been going through any errata I can find when using the POR_B signal for reset and I haven’t found any that are specific to the signals used by the TI wifi SOC. I am going back to my original assumption that the wifi module is crashing and not resetting properly. Can you add code to u-boot that sets up the GPIOs for CSI0_DAT8 and CSI0_DAT14 and force them low in u-boot? Linux should then handle these signals properly after it has loaded.