linux-kernel - [PATCH v7 09/10] rtc: at91sam9: add DT bindings documentation

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Message-Id: <1411465130-29011-10-git-send-email-boris.brezillon@free-electrons.com>
Date:	Tue, 23 Sep 2014 11:38:49 +0200
From:	Boris BREZILLON <boris.brezillon@...e-electrons.com>
To:	Nicolas Ferre <nicolas.ferre@...el.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Andrew Victor <linux@...im.org.za>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	rtc-linux@...glegroups.com, Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Johan Hovold <jhovold@...il.com>
Cc:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Boris BREZILLON <boris.brezillon@...e-electrons.com>
Subject: [PATCH v7 09/10] rtc: at91sam9: add DT bindings documentation

Add RTT bindings documentation.

Signed-off-by: Boris BREZILLON <boris.brezillon@...e-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@...el.com>
---
 .../devicetree/bindings/rtc/atmel,at91sam9-rtc.txt | 23 ++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.txt

diff --git a/Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.txt b/Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.txt
new file mode 100644
index 0000000..f307a1d
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.txt
@@ -0,0 +1,23 @@
+Atmel AT91SAM9260 Real Time Timer
+
+Required properties:
+- compatible: should be: "atmel,at91sam9260-rtt"
+- reg: should encode the memory region of the RTT controller
+- interrupts: rtt alarm/event interrupt
+- clocks: should contain one clock pointing to the slow clk
+- atmel,rtt-rtc-time-reg: should encode the GPBR register used to store
+	the time base when the RTT is used as an RTC.
+	The first cell should point to the GPBR node and the second one
+	encode the offset within the GPBR block (or in other words, the
+	GPBR register used to store the time base).
+
+
+Example:
+
+rtt@...ffe00 {
+	compatible = "atmel,at91sam9260-rtt";
+	reg = <0xfffffd20 0x10>;
+	interrupts = <1 4 7>;
+	clocks = <&clk32k>;
+	atmel,rtt-rtc-time-reg = <&gpbr 0x0>;
+};
-- 
1.9.1

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