I read through the xavier-devkit schematic, and its device-tree sources.
I seems that there are missing GPIO device-tree binding for M.2 M key (PCIE NVMe) wake and alert signals.
PIN A7: for GPIO29_M2_KEYM_PEWAKE. MAIN_GPIO_PORT(S, 6).
No device-tree binding of this GPIO. From pinmux spreadsheet, is pinmux set in SDMMC1_WP mode?
PIN A55: for GPIO34_M2_KEYM_ALERT. MAIN_GPIO_PORT(P, 6).
No device-tree binding of this GPIO. From pinmux spreadsheet, it seems pinmux of this signal is set to GPIO mode.
Why device-tree binding for these two GPIO signals are missing, but they are connected in hardware?