Kernel-4.18.0-80.el8_maxim,ds3231

• Maxim DS3231 Real Time Clock

Required properties:

• compatible: Should contain “maxim,ds3231”.
• reg: I2C address for chip.

Optional property:

• #clock-cells: Should be 1.
• clock-output-names:
  overwrite the default clock names “ds3231_clk_sqw” and “ds3231_clk_32khz”.

Each clock is assigned an identifier and client nodes can use this identifier
to specify the clock which they consume. Following indices are allowed:
- 0: square-wave output on the SQW pin
- 1: square-wave output on the 32kHz pin

• interrupts: rtc alarm/event interrupt. When this property is selected,
  clock on the SQW pin cannot be used.

Example:

ds3231: ds3231@51 {
compatible = “maxim,ds3231”;
reg = <0x68>;
#clock-cells = <1>;
};

device1 {
…
clocks = <&ds3231 0>;
…
};

device2 {
…
clocks = <&ds3231 1>;
…
};