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ARM: dts: at91: shdwc binding: add new shutdown controller documentation
The new shutdown controller compatible with sama5d2 has a new binding documentation and properties. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Sebastian Reichel <sre@kernel.org>
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@ -147,6 +147,65 @@ Example:
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clocks = <&clk32k>;
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clocks = <&clk32k>;
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};
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};
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SHDWC SAMA5D2-Compatible Shutdown Controller
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1) shdwc node
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required properties:
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- compatible: should be "atmel,sama5d2-shdwc".
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- reg: should contain registers location and length
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- clocks: phandle to input clock.
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- #address-cells: should be one. The cell is the wake-up input index.
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- #size-cells: should be zero.
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optional properties:
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- debounce-delay-us: minimum wake-up inputs debouncer period in
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microseconds. It's usually a board-related property.
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- atmel,wakeup-rtc-timer: boolean to enable Real-Time Clock wake-up.
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The node contains child nodes for each wake-up input that the platform uses.
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2) input nodes
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Wake-up input nodes are usually described in the "board" part of the Device
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Tree. Note also that input 0 is linked to the wake-up pin and is frequently
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used.
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Required properties:
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- reg: should contain the wake-up input index [0 - 15].
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Optional properties:
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- atmel,wakeup-active-high: boolean, the corresponding wake-up input described
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by the child, forces the wake-up of the core power supply on a high level.
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The default is to be active low.
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Example:
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On the SoC side:
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shdwc@f8048010 {
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compatible = "atmel,sama5d2-shdwc";
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reg = <0xf8048010 0x10>;
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clocks = <&clk32k>;
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#address-cells = <1>;
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#size-cells = <0>;
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atmel,wakeup-rtc-timer;
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};
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On the board side:
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shdwc@f8048010 {
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debounce-delay-us = <976>;
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input@0 {
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reg = <0>;
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};
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input@1 {
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reg = <1>;
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atmel,wakeup-active-high;
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};
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};
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Special Function Registers (SFR)
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Special Function Registers (SFR)
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Special Function Registers (SFR) manage specific aspects of the integrated
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Special Function Registers (SFR) manage specific aspects of the integrated
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