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@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@4a { + compatible = "cirrus,cs42l52"; + reg = <0x4a>; + reset-gpio = <&gpio 10 0>; + chgfreq = <0x05>; + mica-cfg = <0x00>; + mica-sel = <0x01>; + micbias-lvl = <0x05>; +};