From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nicolas Ferre Subject: [PATCH v4 1/2] ARM: dts: at91: shdwc binding: add new shutdown controller documentation Date: Thu, 10 Mar 2016 16:37:39 +0100 Message-ID: <1457624260-30350-2-git-send-email-nicolas.ferre@atmel.com> References: <1457624260-30350-1-git-send-email-nicolas.ferre@atmel.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1457624260-30350-1-git-send-email-nicolas.ferre@atmel.com> Sender: linux-kernel-owner@vger.kernel.org To: linux-arm-kernel@lists.infradead.org, Alexandre Belloni , sre@kernel.org Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, ijc+devicetree@hellion.org.uk, Nicolas Ferre List-Id: devicetree@vger.kernel.org The new shutdown controller compatible with sama5d2 has a new binding documentation and properties. Signed-off-by: Nicolas Ferre Cc: devicetree@vger.kernel.org Cc: Rob Herring Cc: Pawel Moll Cc: Mark Rutland Cc: Ian Campbell --- Changes in v4: - change property to debounce-delay-us so that we can use a generic property and we can have the unit explicitly included it the name according to Documentation/devicetree/bindings/property-units.txt. - move to atmel,wakeup-active-high boolean property instead of a "high", "low" string comparison. Changes in v3: - get and use slow clock and specify its handler in binding Changes in v2: None .../devicetree/bindings/arm/atmel-at91.txt | 59 ++++++++++++++++++++++ 1 file changed, 59 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/atmel-at91.txt b/Documentation/devicetree/bindings/arm/atmel-at91.txt index 7fd64ec9ee1d..cfeb161cb0ae 100644 --- a/Documentation/devicetree/bindings/arm/atmel-at91.txt +++ b/Documentation/devicetree/bindings/arm/atmel-at91.txt @@ -147,6 +147,65 @@ Example: clocks = <&clk32k>; }; +SHDWC Shutdown Controller (Alternative) + +1) shdwc node + +required properties: +- compatible: should be "atmel,sama5d2-shdwc". +- reg: should contain registers location and length +- clocks: phandle to input clock. +- #address-cells: should be one. The cell is the wake-up input index. +- #size-cells: should be zero. + +optional properties: + +- debounce-delay-us: minimum wake-up inputs debouncer period in + microseconds. It's usually a board-related property. +- atmel,wakeup-rtc-timer: boolean to enable Real-Time Clock wake-up. + +The node contains child nodes for each wake-up input that the platform uses. + +2) input nodes + +Wake-up input nodes are usually described in the "board" part of the Device +Tree. Note also that input 0 is linked to the wake-up pin and is frequently +used. + +Required properties: +- reg: should contain the wake-up input index [0 - 15]. + +Optional properties: +- atmel,wakeup-active-high: boolean, the corresponding wake-up input described + by the child, forces the wake-up of the core power supply on a high level. + The default is to be active low. + +Example: + +On the SoC side: + shdwc@f8048010 { + compatible = "atmel,sama5d2-shdwc"; + reg = <0xf8048010 0x10>; + clocks = <&clk32k>; + #address-cells = <1>; + #size-cells = <0>; + atmel,wakeup-rtc-timer; + }; + +On the board side: + shdwc@f8048010 { + debounce-delay-us = <976>; + + input@0 { + reg = <0>; + }; + + input@1 { + reg = <1>; + atmel,wakeup-active-high; + }; + }; + Special Function Registers (SFR) Special Function Registers (SFR) manage specific aspects of the integrated -- 2.1.3