dt-bindings: fsi-master-gpio: Document "no-gpio-delays" property

Support for this is being added to the driver but the original
patch forgot to add this documentation.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Rob Herring <robh@kernel.org>

diff --git a/Documentation/devicetree/bindings/fsi/fsi-master-gpio.txt b/Documentation/devicetree/bindings/fsi/fsi-master-gpio.txt
index a767259dedadc51cd333c284f121902858046e5a..1e442450747f9c9c9c68a2a71893255359acabdf 100644 (file)
--- a/Documentation/devicetree/bindings/fsi/fsi-master-gpio.txt
+++ b/Documentation/devicetree/bindings/fsi/fsi-master-gpio.txt
@@ -11,6 +11,10 @@ Optional properties:
  - trans-gpios = <gpio-descriptor>;    : GPIO for voltage translator enable
  - mux-gpios = <gpio-descriptor>;      : GPIO for pin multiplexing with other
                                           functions (eg, external FSI masters)
+ - no-gpio-delays;                     : Don't add extra delays between GPIO
+                                          accesses. This is useful when the HW
+                                         GPIO block is running at a low enough
+                                         frequency.
 
 Examples: