usb_port_powerup_delay
unsigned int usb_port_powerup_delay = USB_PORT_POWERUP_DELAY;
} else if (p == &usb_port_powerup_delay) {
TUNABLE_INT("hw.usb.timings.port_powerup_delay", (int *)&usb_port_powerup_delay);
&usb_port_powerup_delay, sizeof(usb_port_powerup_delay),
extern unsigned int usb_port_powerup_delay;
USB_MS_TO_TICKS(usb_port_powerup_delay));