We need to have a way for the kernel to display a dead battery splash screen.  The situation is that if the user has a unit with a dead battery, when the press the power button, it will refuse to power up.  Then if they press and hold the power button, it will boot with the regular splash screen.  The press-and-hold-with-dead-battery state should display a different splash.

I can set the I2C pins to force low when in this state, which could be easily read by Redboot and a different parameter passed to the kernel to go through a different boot sequence.

Thoughts?