Documentation/devicetree/bindings/rtc/st,stm32-rtc.txt

   1 STM32 Real Time Clock
   2
   3 Required properties:
   4 - compatible: "st,stm32-rtc".
   5 - reg: address range of rtc register set.
   6 - clocks: reference to the clock entry ck_rtc.
   7 - interrupt-parent: phandle for the interrupt controller.
   8 - interrupts: rtc alarm interrupt.
   9 - st,syscfg: phandle for pwrcfg, mandatory to disable/enable backup domain
  10   (RTC registers) write protection.
  11
  12 Optional properties (to override default ck_rtc parent clock):
  13 - assigned-clocks: reference to the ck_rtc clock entry.
  14 - assigned-clock-parents: phandle of the new parent clock of ck_rtc.
  15
  16 Example:
  17
  18         rtc: rtc@40002800 {
  19                 compatible = "st,stm32-rtc";
  20                 reg = <0x40002800 0x400>;
  21                 clocks = <&rcc 1 CLK_RTC>;
  22                 assigned-clocks = <&rcc 1 CLK_RTC>;
  23                 assigned-clock-parents = <&rcc 1 CLK_LSE>;
  24                 interrupt-parent = <&exti>;
  25                 interrupts = <17 1>;
  26                 st,syscfg = <&pwrcfg>;
  27         };