linux-kernel - [PATCH] ARM: at91/dt: sama5d2: add SFR node

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Message-ID: <1458228862-25582-1-git-send-email-ludovic.desroches@atmel.com>
Date:	Thu, 17 Mar 2016 16:34:22 +0100
From:	Ludovic Desroches <ludovic.desroches@...el.com>
To:	<nicolas.ferre@...el.com>, <alexandre.belloni@...e-electrons.com>
CC:	<plagnioj@...osoft.com>, <cyrille.pitchen@...el.com>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<boris.brezillon@...e-electrons.com>,
	Ludovic Desroches <ludovic.desroches@...el.com>
Subject: [PATCH] ARM: at91/dt: sama5d2: add SFR node

From: Cyrille Pitchen <cyrille.pitchen@...el.com>

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

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@...el.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@...el.com>
---
 Documentation/devicetree/bindings/arm/atmel-at91.txt |  2 +-
 arch/arm/boot/dts/sama5d2.dtsi                       |  5 +++++
 include/linux/mfd/syscon/atmel-sfr.h                 | 18 ++++++++++++++++++
 3 files changed, 24 insertions(+), 1 deletion(-)
 create mode 100644 include/linux/mfd/syscon/atmel-sfr.h

diff --git a/Documentation/devicetree/bindings/arm/atmel-at91.txt b/Documentation/devicetree/bindings/arm/atmel-at91.txt
index 7fd64ec..550fd66 100644
--- a/Documentation/devicetree/bindings/arm/atmel-at91.txt
+++ b/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@...38000 {
diff --git a/arch/arm/boot/dts/sama5d2.dtsi b/arch/arm/boot/dts/sama5d2.dtsi
index 78996bd..36bb29c 100644
--- a/arch/arm/boot/dts/sama5d2.dtsi
+++ b/arch/arm/boot/dts/sama5d2.dtsi
@@ -973,6 +973,11 @@
 				status = "disabled";
 			};
 
+			sfr: sfr@...30000 {
+				compatible = "atmel,sama5d2-sfr", "syscon";
+				reg = <0xf8030000 0x98>;
+			};
+
 			flx0: flexcom@...34000 {
 				compatible = "atmel,sama5d2-flexcom";
 				reg = <0xf8034000 0x200>;
diff --git a/include/linux/mfd/syscon/atmel-sfr.h b/include/linux/mfd/syscon/atmel-sfr.h
new file mode 100644
index 0000000..2f9bb98
--- /dev/null
+++ b/include/linux/mfd/syscon/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@...el.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 */
-- 
2.5.0