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* NXP PCF8523 Real Time Clock
Required properties:
- compatible: Should contain "nxp,pcf8523".
- reg: I2C address for chip.
Optional property:
- quartz-load-femtofarads: The capacitive load of the quartz(x-tal),
expressed in femto Farad (fF). Valid values are 7000 and 12500.
Default value (if no value is specified) is 12500fF.
pcf8523: rtc@68 {
compatible = "nxp,pcf8523";
reg = <0x68>;
quartz-load-femtofarads = <7000>;