linux-kernel - [PATCH v5 4/5] Documentation: atmel-pmc: add DT bindings for fast startup

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Message-ID: <1458111489-23774-5-git-send-email-wenyou.yang@atmel.com>
Date:	Wed, 16 Mar 2016 14:58:08 +0800
From:	Wenyou Yang <wenyou.yang@...el.com>
To:	Nicolas Ferre <nicolas.ferre@...el.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Russell King <linux@....linux.org.uk>
CC:	<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-clk@...r.kernel.org>, "Rob Herring" <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Brown <broonie@...nel.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	"Kumar Gala" <galak@...eaurora.org>,
	Wenyou Yang <wenyou.yang@...el.com>
Subject: [PATCH v5 4/5] Documentation: atmel-pmc: add DT bindings for fast startup

Add DT bindings to configurate the PMC_FSMR and PMC_FSPR registers
to trigger a fast restart signal to PMC.

Signed-off-by: Wenyou Yang <wenyou.yang@...el.com>
Acked-by: Rob Herring <robh+dt@...nel.org>
---

Changes in v5:
 - due to the DT property expression change, update the binding
   document.

Changes in v4:
 - add Acked-by tag.

Changes in v3:
 - update the property description.

Changes in v2:
 - change the property name and property description.

 .../devicetree/bindings/arm/atmel-pmc.txt          |   52 ++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/atmel-pmc.txt b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
index 795cc78..76fdc66 100644
--- a/Documentation/devicetree/bindings/arm/atmel-pmc.txt
+++ b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
@@ -12,3 +12,55 @@ Examples:
 		compatible = "atmel,at91rm9200-pmc";
 		reg = <0xfffffc00 0x100>;
 	};
+
+PMC Fast Startup Signals
+
+The PMC Fast Start Signals are used as the wake up source to trigger the PMC
+to wake up the system from the ULP1 mode.
+
+required properties:
+- compatible: should be "atmel,sama5d2-pmc-fast-startup".
+
+optional properties:
+- atmel,wakeup-rtc-timer: boolean to enable RTC alarm wake-up.
+- atmel,wakeup-usb-resume: boolean to enable USB resume wake-up.
+- atmel,wakeup-sdmmc-cd: boolean to enable SDMMC card detect wake-up.
+- atmel,wakeup-rxlp-match: boolean to enable RXLP matching condition wake-up.
+- atmel,wakeup-acc-comparison: boolean to enable ACC comparison wake-up.
+
+The node contains child nodes for each wake-up input pin that the platform uses.
+
+Input nodes
+
+Required properties:
+- reg: should contain the wake-up input index [0 - 10], to enable
+  the corresponding wake-up input.
+
+Optional properties:
+- atmel,wakeup-active-high: boolean to declare the corresponding wake-up
+  input described by the child be active high.
+  The default is to be active low.
+
+Example:
+
+	pmc: pmc@...14000 {
+		compatible = "atmel,sama5d2-pmc";
+		reg = <0xf0014000 0x160>;
+
+		pmc_fast_restart {
+			compatible = "atmel,sama5d2-pmc-fast-startup";
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			atmel,wakeup-rtc-timer;
+
+			wkpin: input@0 {
+				reg = <0>;
+			};
+
+			gmac_wol: input@10 {
+				reg = <10>;
+				atmel,wakeup-active-high;
+			};
+		};
+	};
-- 
1.7.9.5