[alsa-devel] [PATCH v2 2/2] dt: binding: sound cs42l52 driver

[Brian Austin]

Add Device Tree Binding for the CS42L52 Codec

v2 Adds clearer explaination of mic configs and select.
Renames bindings to '-' instead of '_'.
Definition of GPIO for reset pin.

Signed-off-by: Brian Austin <brian.austin at cirrus.com>
---
 .../devicetree/bindings/sound/cs42l52.txt          | 48 ++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/cs42l52.txt

diff --git a/Documentation/devicetree/bindings/sound/cs42l52.txt b/Documentation/devicetree/bindings/sound/cs42l52.txt
new file mode 100644
index 0000000..bd91ecf
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/cs42l52.txt
@@ -0,0 +1,48 @@
+CS42L52 audio CODEC
+
+Required properties:
+
+  - compatible : "cirrus,cs42l52"
+
+  - reg : the I2C address of the device for I2C
+
+Optional properties:
+
+  - reset-gpio : GPIO controller's phandle and the number
+		 of the GPIO used to reset the codec.
+  - chgfreq    : Charge Pump Frequency values. Allowable values of
+		 0x00 through 0x0F.
+		 Frequency = (64xFs)/(N+2)
+  - mica-cfg   : MIC A single-ended or differential select.
+		 0x00 = Single-Ended
+		 0x01 = Differential
+  - micb-cfg   : MIC B single-ended or differential select.
+		 0x00 = Single-Ended
+		 0x01 = Differential
+  - mica-sel   : MIC A single ended input select.  For Single-Ended
+		 configuration, select which MIC to use.
+		 0x00 = MIC1
+		 0x01 = MIC2
+  - micb-sel   : MIC B single ended input select.  For Single-Ended
+		 configuration, select which MIC to use.
+		 0x00 = MIC1
+		 0x01 = MIC2
+  - micbias-lvl: Set the output voltage level on the MICBIAS Pin
+		 0x00 = 0.5 x VA
+		 0x01 = 0.6 x VA
+		 0x02 = 0.7 x VA
+		 0x03 = 0.8 x VA
+		 0x04 = 0.83 x VA
+		 0x05 = 0.91 x VA
+
+Example:
+
+codec: cs42l52 at 4a {
+	compatible = "cirrus,cs42l52";
+	reg = <0x4a>;
+	reset-gpio = <&gpio 10 0>;
+	chgfreq = <0x05>;
+	mica-cfg = <0x00>;
+	mica-sel = <0x01>;
+	micbias-lvl = <0x05>;
+};
-- 
1.8.4.rc3