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Date: Fri, 2 Dec 2016 15:09:55 +0100 From: Amelie Delaunay <amelie.delaunay@...com> To: <a.zummo@...ertech.it>, <alexandre.belloni@...e-electrons.com>, <robh+dt@...nel.org>, <mark.rutland@....com>, <mcoquelin.stm32@...il.com>, <alexandre.torgue@...com>, <linux@...linux.org.uk> CC: <rtc-linux@...glegroups.com>, <devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>, <gabriel.fernandez@...com>, <amelie.delaunay@...com> Subject: [PATCH 2/8] dt-bindings: document the STM32 RTC bindings This patch adds documentation of device tree bindings for the STM32 RTC. Signed-off-by: Amelie Delaunay <amelie.delaunay@...com> --- .../devicetree/bindings/rtc/st,stm32-rtc.txt | 31 ++++++++++++++++++++++ 1 file changed, 31 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 0000000..4578838 --- /dev/null +++ b/Documentation/devicetree/bindings/rtc/st,stm32-rtc.txt @@ -0,0 +1,31 @@ +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. +- clock-names: name of the clock used. Should be "ck_rtc". +- interrupt-parent: phandle for the interrupt controller. +- interrupts: rtc alarm interrupt. +- interrupt-names: rtc alarm interrupt name, should be "alarm". +- 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@...02800 { + compatible = "st,stm32-rtc"; + reg = <0x40002800 0x400>; + clocks = <&rcc 1 CLK_RTC>; + clock-names = "ck_rtc"; + assigned-clocks = <&rcc 1 CLK_RTC>; + assigned-clock-parents = <&rcc 1 CLK_LSE>; + interrupt-parent = <&exti>; + interrupts = <17 1>; + interrupt-names = "alarm"; + st,syscfg = <&pwrcfg>; + }; -- 1.9.1
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