I’ve read both 3.8 and 3.8.1 (see below), but the only thing I need to do is tie the CHARGER_PRSNT# pin to GND (see last sentence in 3.8.1), right? This can be done by installing a 0 Ohm resistor on R313?
From the Jetson TX2/TX2i OEM DG (20180618):
3.8 Optional Auto-Power-On Support
Jetson TX2 and Jetson TX2i both optionally support Auto-Pow er-On. This allow s the platform to pow er on w hen VDD_IN is first pow ered, instead of w aiting for a pow er button press. For Jetson TX2, to enable this feature, the CHARGER_PRSNT# pin should be tied to GND. For Jetson TX2i, w hich uses a different PMIC, the POWER_BTN# pin needs to be held high. As there is a pull-up on the module, the POWER_BTN# pin can be left floating on the carrier board. If a design w ill support both Jetson TX2 and Jetson TX2i and needs to pow er on without a button press (Auto-Power-On), the CHARGER_PRSNT# pin should be tied to GND, and the POWER_BTN# pin should be left unconnected.
3.8.1 Jetson TX2 Auto-Power-On Details
This section provides guidance for modifying a carrier board design to power the platform on when VDD_IN is first powered, instead of waiting for a power button press. In order to power the system on without a power button, a specific sequence is required between the time the VDD_IN pow er is connected and the CHARGER_PRSNT# pin on the module is driven low . The CHARGER_PRSNT# pin connects to the module PMIC and requires a minimum delay of 300ms from the point VDD_IN reaches its minimum level (5.5V) before it can be driven low. Jetson TX2/TX2i includes circuitry on the module to support Auto-Power-On. In order to enable this feature, the CHARGER_PRSNT# pin should be tied to GND.