Add a check in the _ON method, similar to coreboot's ONSK handling
in its RTD3 driver, to determine whether the enable GPIO is already
asserted.
This prevents the OS from repeatedly invoking _ON, which can happen
because CNVi takes around 300ms to initialize after the GPIO is
enabled.
Change-Id: I53986aa11714666c12056460aa47396266a00a1c
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/87240
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
ba7ed69583