1 * NXP PCF8523 Real Time Clock
4 - compatible: Should contain "nxp,pcf8523".
5 - reg: I2C address for chip.
8 - quartz-load-femtofarads: The capacitive load of the quartz(x-tal),
9 expressed in femto Farad (fF). Valid values are 7000 and 12500.
10 Default value (if no value is specified) is 12500fF.
15 compatible = "nxp,pcf8523";
17 quartz-load-femtofarads = <7000>;