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-rw-r--r--Documentation/devicetree/bindings/gpio/gpio-grgpio.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-grgpio.txt b/Documentation/devicetree/bindings/gpio/gpio-grgpio.txt
index 1ec46fdf11d0..e466598105fc 100644
--- a/Documentation/devicetree/bindings/gpio/gpio-grgpio.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio-grgpio.txt
@@ -17,5 +17,10 @@ Optional properties:
- nbits : The number of gpio lines. If not present driver assumes 32 lines.
+- irqmap : An array with an index for each gpio line. An index is either a valid
+ index into the interrupts property array, or 0xffffffff that indicates
+ no irq for that line. Driver provides no interrupt support if not
+ present.
+
For further information look in the documentation for the GLIB IP core library:
http://www.gaisler.com/products/grlib/grip.pdf