Commit 7c609305 authored by Amelie Delaunay's avatar Amelie Delaunay Committed by Alexandre Belloni

dt-bindings: document the STM32 RTC bindings

This patch adds documentation of device tree bindings for the STM32 RTC.
Signed-off-by: default avatarAmelie Delaunay <[email protected]>
Acked-by: Rob Herring's avatarRob Herring <[email protected]>
Signed-off-by: default avatarAlexandre Belloni <[email protected]>
parent d748c981
STM32 Real Time Clock
Required properties:
- compatible: "st,stm32-rtc".
- reg: address range of rtc register set.
- clocks: reference to the clock entry ck_rtc.
- interrupt-parent: phandle for the interrupt controller.
- interrupts: rtc alarm interrupt.
- st,syscfg: phandle for pwrcfg, mandatory to disable/enable backup domain
(RTC registers) write protection.
Optional properties (to override default ck_rtc parent clock):
- assigned-clocks: reference to the ck_rtc clock entry.
- assigned-clock-parents: phandle of the new parent clock of ck_rtc.
Example:
rtc: [email protected] {
compatible = "st,stm32-rtc";
reg = <0x40002800 0x400>;
clocks = <&rcc 1 CLK_RTC>;
assigned-clocks = <&rcc 1 CLK_RTC>;
assigned-clock-parents = <&rcc 1 CLK_LSE>;
interrupt-parent = <&exti>;
interrupts = <17 1>;
st,syscfg = <&pwrcfg>;
};
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