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-rw-r--r--Documentation/devicetree/bindings/mfd/syscon.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mfd/syscon.txt b/Documentation/devicetree/bindings/mfd/syscon.txt
index fe8150bb3248..408f768686f1 100644
--- a/Documentation/devicetree/bindings/mfd/syscon.txt
+++ b/Documentation/devicetree/bindings/mfd/syscon.txt
@@ -13,6 +13,10 @@ Required properties:
- compatible: Should contain "syscon".
- reg: the register region can be accessed from syscon
+Optional property:
+- reg-io-width: the size (in bytes) of the IO accesses that should be
+ performed on the device.
+
Examples:
gpr: iomuxc-gpr@020e0000 {
compatible = "fsl,imx6q-iomuxc-gpr", "syscon";