[PATCH 03/16] dt-bindings: fpga: machxo2-slave: add pin for program sequence init

[Johannes Zink <j.zink@pengutronix.de>]

This commit adds a pin which initiates the FPGA programming sequence
once pulsed low.

Signed-off-by: Johannes Zink <j.zink@pengutronix.de>
---
 .../devicetree/bindings/fpga/lattice,machxo2-slave.yaml    | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/fpga/lattice,machxo2-slave.yaml b/Documentation/devicetree/bindings/fpga/lattice,machxo2-slave.yaml
index 78f0da8f772f..03dc134ec7b8 100644
--- a/Documentation/devicetree/bindings/fpga/lattice,machxo2-slave.yaml
+++ b/Documentation/devicetree/bindings/fpga/lattice,machxo2-slave.yaml
@@ -26,6 +26,12 @@ properties:
     enum:
       - lattice,machxo2-slave-spi
 
+  program-gpios:
+    maxItems: 1
+    description: |
+      GPIO Output tied to the FPGA's n_program pin to initiate a
+      programming sequence. This pin is active low.
+
   lattice,erase-sram:
     type: boolean
     description: SRAM is to be erased during flash erase operation
@@ -57,5 +63,6 @@ examples:
             reg = <0>;
             lattice,erase-sram;
             lattice,erase-feature-row;
+            lattice,program-gpios = <&gpio1 2 GPIO_ACTIVE_LOW>
         };
     };
-- 
2.30.2