Kernel-4.18.0-80.el8_rtc-ds1307

Dallas DS1307 and compatible RTC

Required properties:

• compatible: should be one of:
  “dallas,ds1307”,
  “dallas,ds1308”,
  “dallas,ds1337”,
  “dallas,ds1338”,
  “dallas,ds1339”,
  “dallas,ds1388”,
  “dallas,ds1340”,
  “dallas,ds1341”,
  “maxim,ds3231”,
  “st,m41t0”,
  “st,m41t00”,
  “microchip,mcp7940x”,
  “microchip,mcp7941x”,
  “pericom,pt7c4338”,
  “epson,rx8025”,
  “isil,isl12057”
• reg: I2C bus address of the device

Optional properties:

• interrupt-parent: phandle for the interrupt controller.
• interrupts: rtc alarm interrupt.
• clock-output-names: From common clock binding to override the default output

                  clock name
  

• wakeup-source: Enables wake up of host system on alarm
• trickle-resistor-ohms : ds1339, ds1340 and ds 1388 only
  Selected resistor for trickle charger
  Possible values are 250, 2000, 4000
  Should be given if trickle charger should be enabled
• trickle-diode-disable : ds1339, ds1340 and ds 1388 only
  Do not use internal trickle charger diode
  Should be given if internal trickle charger diode should be disabled

Example:
rtc1: ds1339@68 {
compatible = “dallas,ds1339”;
reg = <0x68>;
interrupt-parent = <&gpio4>;
interrupts = <20 0>;
trickle-resistor-ohms = <250>;
};