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Subject[PATCH v2 1/2] ASoC: cs4234: Add dtschema binding document
Date
From: Charles Keepax <ckeepax@opensource.cirrus.com>

Document the bindings for the CS4234 ASoC codec driver.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---
.../bindings/sound/cirrus,cs4234.yaml | 74 +++++++++++++++++++
1 file changed, 74 insertions(+)
create mode 100644 Documentation/devicetree/bindings/sound/cirrus,cs4234.yaml

diff --git a/Documentation/devicetree/bindings/sound/cirrus,cs4234.yaml b/Documentation/devicetree/bindings/sound/cirrus,cs4234.yaml
new file mode 100644
index 000000000000..156560b2a980
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/cirrus,cs4234.yaml
@@ -0,0 +1,74 @@
+# SPDX-License-Identifier: (GPL-2.0+ OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/cirrus,cs4234.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cirrus Logic cs4234 audio CODEC
+
+maintainers:
+ - patches@opensource.cirrus.com
+
+description:
+ The CS4234 is a highly versatile CODEC that combines 4 channels of
+ high performance analog to digital conversion, 4 channels of high
+ performance digital to analog conversion for audio, and 1 channel of
+ digital to analog conversion to provide a nondelayed audio reference
+ signal to an external Class H tracking power supply. If not used to
+ drive a tracking power supply, the 5th DAC can instead be used as a
+ standard audio grade DAC, with performance specifications identical
+ to that of the 4 DACs in the audio path. Additionally, the CS4234
+ includes tunable group delay for each of the 4 audio DAC paths to
+ provide lead time for the external switch-mode power supply, and a
+ nondelayed path into the DAC outputs for input signals requiring a
+ low-latency path to the outputs.
+
+properties:
+ compatible:
+ enum:
+ - cirrus,cs4234
+
+ reg:
+ description:
+ The 7-bit I2C address depends on the state of the ADx pins, in
+ binary given by [0 0 1 0 AD2 AD1 AD0 0].
+ items:
+ minimum: 0x10
+ maximum: 0x17
+
+ VA-supply:
+ description:
+ Analogue power supply.
+
+ VL-supply:
+ description:
+ Interface power supply.
+
+ reset-gpios:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - VA-supply
+ - VL-supply
+
+additionalProperties: false
+
+examples:
+ - |
+ i2c@e0004000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0xe0004000 0x1000>;
+
+ cs4234: codec@11 {
+ compatible = "cirrus,cs4234";
+ reg = <0x11>;
+
+ VA-supply = <&vdd3v3>;
+ VL-supply = <&vdd3v3>;
+
+ reset-gpios = <&gpio 0>;
+ };
+ };
--
2.20.1
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