Document the new system-clock-fixed flag, which can be used to specify
that the driver cannot or should not allow the clock frequency of the
mapped clock to be modified.
Signed-off-by: Robert Hancock <robert.hancock@xxxxxxxxxx>
---
.../devicetree/bindings/sound/simple-card.yaml | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/simple-card.yaml b/Documentation/devicetree/bindings/sound/simple-card.yaml
index 45fd9fd9eb54..00597dc4f396 100644
--- a/Documentation/devicetree/bindings/sound/simple-card.yaml
+++ b/Documentation/devicetree/bindings/sound/simple-card.yaml
@@ -48,6 +48,15 @@ definitions:
It is useful for some aCPUs with fixed clocks.
$ref: /schemas/types.yaml#/definitions/flag
+ system-clock-fixed:
+ description: |
+ Specifies that the clock frequency should not be modified.
+ Implied when system-clock-frequency is specified, but can be used when
+ a clock is mapped to the device whose frequency cannot or should not be
+ changed. When mclk-fs is also specified, this restricts the device to a
+ single fixed sampling rate.
+ $ref: /schemas/types.yaml#/definitions/flag
+
mclk-fs:
description: |
Multiplication factor between stream rate and codec mclk.
@@ -134,6 +143,8 @@ definitions:
$ref: "#/definitions/system-clock-frequency"
system-clock-direction-out:
$ref: "#/definitions/system-clock-direction-out"
+ system-clock-fixed:
+ $ref: "#/definitions/system-clock-fixed"
required:
- sound-dai
--
2.31.1
