[PATCH v2 1/2] dt-bindings: spi: qcom-geni: Document ready-gpios property

[Praveen Talari]

When operating in SPI target (slave) mode, the GENI SPI controller can
use an external GPIO to notify the SPI master about the target's
active state.

Document the optional ready-gpios property for the qcom,spi-geni-qcom
and qcom,sa8255p-geni-spi bindings, restricted to spi-slave nodes.

Signed-off-by: Praveen Talari <praveen.talari@xxxxxxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/spi/qcom,sa8255p-geni-spi.yaml | 9 +++++++++
 Documentation/devicetree/bindings/spi/qcom,spi-geni-qcom.yaml    | 9 +++++++++
 2 files changed, 18 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/qcom,sa8255p-geni-spi.yaml b/Documentation/devicetree/bindings/spi/qcom,sa8255p-geni-spi.yaml
index 6552303a4f52..33eddb395a0a 100644
--- a/Documentation/devicetree/bindings/spi/qcom,sa8255p-geni-spi.yaml
+++ b/Documentation/devicetree/bindings/spi/qcom,sa8255p-geni-spi.yaml
@@ -39,6 +39,12 @@ properties:
       - const: power
       - const: perf
 
+  ready-gpios:
+    description:
+      GPIO used by the SPI target to notify the SPI master when it is
+      ready to service a transfer. Only applicable in target (slave) mode.
+    maxItems: 1
+
 required:
   - compatible
   - reg
@@ -46,6 +52,9 @@ required:
   - power-domains
   - power-domain-names
 
+dependencies:
+  ready-gpios: [ spi-slave ]
+
 allOf:
   - $ref: /schemas/spi/spi-controller.yaml#
 
diff --git a/Documentation/devicetree/bindings/spi/qcom,spi-geni-qcom.yaml b/Documentation/devicetree/bindings/spi/qcom,spi-geni-qcom.yaml
index edf399681d7a..8d1c78701657 100644
--- a/Documentation/devicetree/bindings/spi/qcom,spi-geni-qcom.yaml
+++ b/Documentation/devicetree/bindings/spi/qcom,spi-geni-qcom.yaml
@@ -67,6 +67,12 @@ properties:
   reg:
     maxItems: 1
 
+  ready-gpios:
+    description:
+      GPIO used by the SPI target to notify the SPI master when it is
+      ready to service a transfer. Only applicable in target (slave) mode.
+    maxItems: 1
+
 required:
   - compatible
   - clocks
@@ -74,6 +80,9 @@ required:
   - interrupts
   - reg
 
+dependencies:
+  ready-gpios: [ spi-slave ]
+
 unevaluatedProperties: false
 
 examples:

-- 
2.34.1