From 7c60930500b5b48e12ef6b9d332b300f3e9a8354 Mon Sep 17 00:00:00 2001 From: Amelie Delaunay Date: Thu, 5 Jan 2017 14:43:23 +0100 Subject: [PATCH] dt-bindings: document the STM32 RTC bindings This patch adds documentation of device tree bindings for the STM32 RTC. Signed-off-by: Amelie Delaunay Acked-by: Rob Herring Signed-off-by: Alexandre Belloni --- .../devicetree/bindings/rtc/st,stm32-rtc.txt | 27 +++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 Documentation/devicetree/bindings/rtc/st,stm32-rtc.txt diff --git a/Documentation/devicetree/bindings/rtc/st,stm32-rtc.txt b/Documentation/devicetree/bindings/rtc/st,stm32-rtc.txt new file mode 100644 index 000000000000..e2837b951237 --- /dev/null +++ b/Documentation/devicetree/bindings/rtc/st,stm32-rtc.txt @@ -0,0 +1,27 @@ +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: rtc@40002800 { + 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>; + }; -- 2.20.1