linux-kernel - [PATCH v2 2/7] ASoC: audio-graph-card: Add plls and sysclks DT bindings

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Message-ID: <20201016173541.21180-3-rf@opensource.cirrus.com>
Date:   Fri, 16 Oct 2020 18:35:36 +0100
From:   Richard Fitzgerald <rf@...nsource.cirrus.com>
To:     <broonie@...nel.org>, <robh+dt@...nel.org>,
        <nsaenzjulienne@...e.de>
CC:     <patches@...nsource.cirrus.com>, <alsa-devel@...a-project.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-rpi-kernel@...ts.infradead.org>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>
Subject: [PATCH v2 2/7] ASoC: audio-graph-card: Add plls and sysclks DT bindings

This adds the two new properties 'plls' and 'sysclks' to the dt bindings.
These add the ability to set values that will be
passed to snd_soc_component_set_sysclk() and snd_soc_component_set_pll().

Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
---
 .../bindings/sound/audio-graph-card.txt       | 44 +++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/audio-graph-card.txt b/Documentation/devicetree/bindings/sound/audio-graph-card.txt
index d5f6919a2d69..59bbd5b55b59 100644
--- a/Documentation/devicetree/bindings/sound/audio-graph-card.txt
+++ b/Documentation/devicetree/bindings/sound/audio-graph-card.txt
@@ -32,6 +32,19 @@ Required properties:
 Optional properties:
 - pa-gpios: GPIO used to control external amplifier.
 
+- plls: A list of component pll settings that will be applied with
+      snd_soc_component_set_pll. Each entry is a phandle to the node of the
+      codec or cpu component, followed by the four arguments id, source,
+      frequency_in, frequency_out. Multiple entries can have the same phandle
+      so that several plls can be set in the same component.
+
+- sysclks: A list of component sysclk settings that will be applied with
+      snd_soc_component_set_sysclk. Each entry is a phandle to the node of
+      the codec or cpu component, followed by the four arguments id, source,
+      frequency, direction. Direction is 0 if the clock is an input, 1 if it
+      is an output. Multiple entries can have the same phandle so that several
+      clocks can be set in the same component.
+
 -----------------------
 Example: Single DAI case
 -----------------------
@@ -335,3 +348,34 @@ Example: Multi DAI with DPCM
 			};
 		};
 	};
+
+-----------------------
+Example: Set component sysclks and PLLs
+-----------------------
+
+	sound {
+		compatible = "audio-graph-card";
+
+		sysclks = <
+			&cs47l15 1 4 98304000 0
+			&cs47l15 8 4 147456000 0
+		>;
+		plls = <
+			&cs47l15 1 0 24576000 98304000
+		>;
+
+		dais = <&cpu_i2s_port>;
+	};
+
+	cs47l15: codec@0 {
+		...
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			cs47l15_aif1_port: port@0 {
+				reg = <0>;
+				cs47l15_aif1: endpoint {
+					remote-endpoint = <&cpu_i2s_endpoint>;
+				};
+			};
+	};
-- 
2.20.1