PIN_IO_DRIVE
arg = FIELD_GET(PIN_IO_DRIVE, value);
v &= ~PIN_IO_DRIVE;
v |= FIELD_PREP(PIN_IO_DRIVE, ret);
m |= PIN_IO_DRIVE;
arg = FIELD_GET(PIN_IO_DRIVE, value);
v &= ~(PIN_IO_DRIVE | PIN_IO_OUTPUT_ENABLE);
v |= FIELD_PREP(PIN_IO_DRIVE, ret);
m |= PIN_IO_DRIVE | PIN_IO_OUTPUT_ENABLE;