SYSFS, as legacy interface for GPIO control in Linux. While widely used in the past, this interface has been officially deprecated in favor of the libgpiod character device interface since Linux kernel version 6.0 and later.

On MX95, need to modify the configuration of the Config-Tools to run DDR test if the SDP is through USB2.

MX95 A1(engineering version, not for production) has both USB1 and USB2 enabled as SDP.

MX95 B0 will only enable one USB port as SDP, and SDP on USB1 and USB2 will be in different part-number.