linux-kernel - [PATCH 1/3] ARM: at91: Add Special Function Registers binding documentation

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Message-Id: <1415632471-14672-1-git-send-email-alexandre.belloni@free-electrons.com>
Date:	Mon, 10 Nov 2014 16:14:29 +0100
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Nicolas Ferre <nicolas.ferre@...el.com>
Cc:	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	devicetree@...r.kernel.org
Subject: [PATCH 1/3] ARM: at91: Add Special Function Registers binding documentation

The special function registers gather some registers that allow to tweak
features provided by IPs controlled through another register range.

Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
---
 Documentation/devicetree/bindings/arm/atmel-at91.txt | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/atmel-at91.txt b/Documentation/devicetree/bindings/arm/atmel-at91.txt
index 562cda9d86d9..a6427de45785 100644
--- a/Documentation/devicetree/bindings/arm/atmel-at91.txt
+++ b/Documentation/devicetree/bindings/arm/atmel-at91.txt
@@ -136,3 +136,20 @@ Example:
 		compatible = "atmel,at91sam9260-rstc";
 		reg = <0xfffffd00 0x10>;
 	};
+
+Special Function Registers (SFR)
+
+Special Function Registers (SFR) manage specific aspects of the integrated
+memory, bridge implementations, processor and other functionality not controlled
+elsewhere.
+
+required properties:
+- compatible: Should be "atmel,<chip>-sfr", "syscon".
+  <chip> can be "at91sam9260", "at91sam9rl" or "at91sam9x5".
+- reg: Should contain registers location and length
+
+	sfr@...38000 {
+		compatible = "atmel,sama5d3-sfr", "syscon";
+		reg = <0xf0038000 0x4000>;
+	};
+
-- 
2.1.0

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