simple-mux immediately activates the new output, even when it is powered
down. This can be undesirable in some cases, for example when a
mechanical relais is used.
Adds "idle-state" property from the mux controller to select the output
state to be used when the mux is powered down.
Signed-off-by: Hendrik v. Raven <h.v.raven@xxxxxxxxxxxxxx>
---
Changes in v2:
- No changes
---
Documentation/devicetree/bindings/sound/simple-audio-mux.yaml | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/simple-audio-mux.yaml b/Documentation/devicetree/bindings/sound/simple-audio-mux.yaml
index 194ac1d4f4f5f40a9bc44e8cd0acbf2eab708365..9b1bda4852e160618ffd349d2f7c90645d5b3e03 100644
--- a/Documentation/devicetree/bindings/sound/simple-audio-mux.yaml
+++ b/Documentation/devicetree/bindings/sound/simple-audio-mux.yaml
@@ -29,6 +29,10 @@ properties:
$ref: /schemas/types.yaml#/definitions/string-array
maxItems: 2
+ idle-state:
+ description: If present specifies the state when the mux is powered down
+ $ref: /schemas/mux/mux-controller.yaml#/properties/idle-state
+
sound-name-prefix: true
required:
@@ -43,4 +47,5 @@ examples:
compatible = "simple-audio-mux";
mux-gpios = <&gpio 3 0>;
state-labels = "Label_A", "Label_B";
+ idle-state = <0>;
};
--
2.47.0
