ARM: dts: at91: sama5d2: add SFR node

This SFR node is looked up by the I2S controller driver to tune the
SFR_I2SCLKSEL register.

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

Documentation/devicetree/bindings/arm/atmel-at91.txt

@@ -155,7 +155,7 @@ elsewhere.
 
 required properties:
 - compatible: Should be "atmel,<chip>-sfr", "syscon".
-  <chip> can be "sama5d3" or "sama5d4".
+  <chip> can be "sama5d3", "sama5d4" or "sama5d2".
 - reg: Should contain registers location and length
 
 	sfr@f0038000 {

arch/arm/boot/dts/sama5d2.dtsi

@@ -973,6 +973,11 @@
 				status = "disabled";
 			};
 
+			sfr: sfr@f8030000 {
+				compatible = "atmel,sama5d2-sfr", "syscon";
+				reg = <0xf8030000 0x98>;
+			};
+
 			flx0: flexcom@f8034000 {
 				compatible = "atmel,sama5d2-flexcom";
 				reg = <0xf8034000 0x200>;

include/soc/at91/atmel-sfr.h

@@ -0,0 +1,18 @@
+/*
+ * Atmel SFR (Special Function Registers) register offsets and bit definitions.
+ *
+ * Copyright (C) 2016 Atmel
+ *
+ * Author: Ludovic Desroches <ludovic.desroches@atmel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _LINUX_MFD_SYSCON_ATMEL_SFR_H
+#define _LINUX_MFD_SYSCON_ATMEL_SFR_H
+
+#define AT91_SFR_I2SCLKSEL	0x90	/* I2SC Register */
+
+#endif /* _LINUX_MFD_SYSCON_ATMEL_SFR_H */