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@xxxxxxxxxxxxxxxxxx>
---
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@f0038000 {
+ compatible = "atmel,sama5d3-sfr", "syscon";
+ reg = <0xf0038000 0x4000>;
+ };
+
--
2.1.0
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