bindings: mfd: cros ec: Document vbc EC property

Some EC implementations include a small nvram space used to store verified boot context data. This boolean property lets us indicate whether this space is available or not on a specific EC implementation. Signed-off-by: Emilio López <[email protected]> Reviewed-by: Javier Martinez Canillas <[email protected]> Signed-off-by: Lee Jones <[email protected]>
klaby · Oct 30, 2015 · 5b855ff · 5b855ff
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diff --git a/Documentation/devicetree/bindings/mfd/cros-ec.txt b/Documentation/devicetree/bindings/mfd/cros-ec.txt
@@ -34,6 +34,10 @@ Required properties (LPC):
 - compatible: "google,cros-ec-lpc"
 - reg: List of (IO address, size) pairs defining the interface uses
 
+Optional properties (all):
+- google,has-vbc-nvram: Some implementations of the EC include a small
+  nvram space used to store verified boot context data. This boolean flag
+  is used to specify whether this nvram is present or not.
 
 Example for I2C: