linux-kernel - [PATCH v5 03/11] ASoC: dt-bindings: tegra20-i2s: Document new nvidia,fixed-parent-rate property

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Message-Id: <20211217175606.22645-4-digetx@gmail.com>
Date:   Fri, 17 Dec 2021 20:55:58 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Mark Brown <broonie@...nel.org>, Takashi Iwai <tiwai@...e.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Liam Girdwood <lgirdwood@...il.com>,
        Agneli <poczt@...tonmail.ch>
Cc:     linux-tegra@...r.kernel.org, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: [PATCH v5 03/11] ASoC: dt-bindings: tegra20-i2s: Document new nvidia,fixed-parent-rate property

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@...nel.org>
Acked-by: Thierry Reding <treding@...dia.com>
Signed-off-by: Dmitry Osipenko <digetx@...il.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
-- 
2.33.1