[PATCH 2/4] dt-bindings: gpio: fairchild,74hc595: Add latch-gpios property

["J. Neuschäfer via B4 Relay" <devnull+j.ne.posteo.net@kernel.org>]

From: "J. Neuschäfer" <j.ne@posteo.net>

The Fairchild MM74HC595 and other compatible parts have a latch clock
input (also known as storage register clock input), which must be
clocked once in order to apply any value that was serially shifted in.

This patch adds a latch-gpios property to the binding to allow
specifying a GPIO that connects to the latch clock.

Signed-off-by: J. Neuschäfer <j.ne@posteo.net>
---
 Documentation/devicetree/bindings/gpio/fairchild,74hc595.yaml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpio/fairchild,74hc595.yaml b/Documentation/devicetree/bindings/gpio/fairchild,74hc595.yaml
index 629cf9b2ab8e4a63fbe17f56792a46d2066d40c3..38d473a3852154e53faec88dc911dc0a4f9cbd1f 100644
--- a/Documentation/devicetree/bindings/gpio/fairchild,74hc595.yaml
+++ b/Documentation/devicetree/bindings/gpio/fairchild,74hc595.yaml
@@ -34,6 +34,10 @@ properties:
     description: GPIO connected to the OE (Output Enable) pin.
     maxItems: 1
 
+  latch-gpios:
+    description: GPIO connected to the latch clock or storage register clock pin.
+    maxItems: 1
+
 patternProperties:
   "^(hog-[0-9]+|.+-hog(-[0-9]+)?)$":
     type: object

-- 
2.45.2