Kernel-4.18.0-80.el8_rtc-omap

TI Real Time Clock

Required properties:

• compatible:
  • “ti,da830-rtc” - for RTC IP used similar to that on DA8xx SoC family.
  • “ti,am3352-rtc” - for RTC IP used similar to that on AM335x SoC family.

          This RTC IP has special WAKE-EN Register to enable
          Wakeup generation for event Alarm. It can also be
          used to control an external PMIC via the
          pmic_power_en pin.
    

  • “ti,am4372-rtc” - for RTC IP used similar to that on AM437X SoC family.
• reg: Address range of rtc register set
• interrupts: rtc timer, alarm interrupts in order
• interrupt-parent: phandle for the interrupt controller

Optional properties:

• system-power-controller: whether the rtc is controlling the system power
  through pmic_power_en
• clocks: Any internal or external clocks feeding in to rtc
• clock-names: Corresponding names of the clocks
• pinctrl-0: a phandle pointing to the pin settings for the device
• pinctrl-names: should be “default”

Optional subnodes:

• generic pinctrl node

Required pinctrl subnodes properties:

• pins - Names of ext_wakeup pins to configure

Optional pinctrl subnodes properties:

• input-enable - Enables ext_wakeup
• ti,active-high - Set input active high (by default active low)

Example:

rtc@1c23000 {
compatible = “ti,da830-rtc”;
reg = <0x23000 0x1000>;
interrupts = <19
19>;
interrupt-parent = <&intc>;
system-power-controller;
clocks = <&clk_32k_rtc>, <&clk_32768_ck>;
clock-names = “ext-clk”, “int-clk”;

pinctrl-0 = <&ext_wakeup>;
pinctrl-names = "default";

ext_wakeup: ext-wakeup {
    pins = "ext_wakeup0";
    input-enable;
    ti,active-high;
};

};