1 NVIDIA compliant embedded controller
4 - compatible : should be "nvidia,nvec".
5 - reg : the iomem of the i2c slave controller
6 - interrupts : the interrupt line of the i2c slave controller
7 - clock-frequency : the frequency of the i2c bus
8 - gpios : the gpio used for ec request
9 - slave-addr: the i2c address of the slave controller