linux-kernel - [PATCH 3/4] ASoC: meson: add axg pdm input DT binding documentation

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Date:   Wed, 29 Aug 2018 17:00:50 +0200
From:   Jerome Brunet <jbrunet@...libre.com>
To:     Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Kevin Hilman <khilman@...libre.com>,
        Carlo Caione <carlo@...one.org>
Cc:     Jerome Brunet <jbrunet@...libre.com>, alsa-devel@...a-project.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/4] ASoC: meson: add axg pdm input DT binding documentation

Add the DT binding documentation for axg's PDM input

Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
---
 .../bindings/sound/amlogic,axg-pdm.txt        | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/amlogic,axg-pdm.txt

diff --git a/Documentation/devicetree/bindings/sound/amlogic,axg-pdm.txt b/Documentation/devicetree/bindings/sound/amlogic,axg-pdm.txt
new file mode 100644
index 000000000000..5672d0bc5b16
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/amlogic,axg-pdm.txt
@@ -0,0 +1,24 @@
+* Amlogic Audio PDM input
+
+Required properties:
+- compatible: 'amlogic,axg-pdm'
+- reg: physical base address of the controller and length of memory
+       mapped region.
+- clocks: list of clock phandle, one for each entry clock-names.
+- clock-names: should contain the following:
+  * "pclk"   : peripheral clock.
+  * "dclk"   : pdm digital clock
+  * "sysclk" : dsp system clock
+- #sound-dai-cells: must be 0.
+
+Example of PDM on the A113 SoC:
+
+pdm: audio-controller@...32000 {
+	compatible = "amlogic,axg-pdm";
+	reg = <0x0 0xff632000 0x0 0x34>;
+	#sound-dai-cells = <0>;
+	clocks = <&clkc_audio AUD_CLKID_PDM>,
+		 <&clkc_audio AUD_CLKID_PDM_DCLK>,
+		 <&clkc_audio AUD_CLKID_PDM_SYSCLK>;
+	clock-names = "pclk", "dclk", "sysclk";
+};
-- 
2.17.1