Document new nvidia,fixed-parent-rate property which instructs that this board wants parent clock to stay at a fixed rate. It allows to prevent conflicts between audio components that share same parent PLL. For instance, this property allows to have HDMI audio, speaker and headphones in the system playing audio simultaneously, which is a common pattern for consumer devices.
Reviewed-by: Rob Herring robh@kernel.org Acked-by: Thierry Reding treding@nvidia.com Signed-off-by: Dmitry Osipenko digetx@gmail.com --- .../devicetree/bindings/sound/nvidia,tegra20-i2s.yaml | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/nvidia,tegra20-i2s.yaml b/Documentation/devicetree/bindings/sound/nvidia,tegra20-i2s.yaml index 4c00fd0943c3..0572aceca8ab 100644 --- a/Documentation/devicetree/bindings/sound/nvidia,tegra20-i2s.yaml +++ b/Documentation/devicetree/bindings/sound/nvidia,tegra20-i2s.yaml @@ -42,6 +42,13 @@ properties: - const: rx - const: tx
+ nvidia,fixed-parent-rate: + description: | + Specifies whether board prefers parent clock to stay at a fixed rate. + This allows multiple Tegra20 audio components work simultaneously by + limiting number of supportable audio rates. + type: boolean + required: - compatible - reg