forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

ASoC: atmel: machine driver for at91sam9x5-wm8731 boards

Browse source 
Description of the Asoc machine driver for an at91sam9x5 based board
with a wm8731 audio DAC. Wm8731 is clocked by a crystal and used as a
master on the SSC/I2S interface. Its connections are a headphone jack
and an Line input jack.

[Richard: this is based on an old patch from Nicolas that I forward
ported and reworked to use only device tree]

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Nicolas Ferre 2013-07-30 12:32:03 +02:00 • committed by Mark Brown
parent 52f19b14ec
commit fdbcb3cba5
5 changed files with 264 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

35
Documentation/devicetree/bindings/sound/atmel-sam9x5-wm8731-audio.txt Normal file
View file

@ -0,0 +1,35 @@
* Atmel at91sam9x5ek wm8731 audio complex
Required properties:
- compatible: "atmel,sam9x5-wm8731-audio"
- atmel,model: The user-visible name of this sound complex.
- atmel,ssc-controller: The phandle of the SSC controller
- atmel,audio-codec: The phandle of the WM8731 audio codec
- atmel,audio-routing: A list of the connections between audio components.
Each entry is a pair of strings, the first being the connection's sink,
the second being the connection's source.
Available audio endpoints for the audio-routing table:
Board connectors:
* Headphone Jack
* Line In Jack
wm8731 pins:
cf Documentation/devicetree/bindings/sound/wm8731.txt
Example:
sound {
compatible = "atmel,sam9x5-wm8731-audio";
atmel,model = "wm8731 @ AT91SAM9X5EK";
atmel,audio-routing =
"Headphone Jack", "RHPOUT",
"Headphone Jack", "LHPOUT",
"LLINEIN", "Line In Jack",
"RLINEIN", "Line In Jack";
atmel,ssc-controller = <&ssc0>;
atmel,audio-codec = <&wm8731>;
};

9
Documentation/devicetree/bindings/sound/wm8731.txt
View file

@ -16,3 +16,12 @@ codec: wm8731@1a {
compatible = "wlf,wm8731";
reg = <0x1a>;
};
Available audio endpoints for an audio-routing table:
* LOUT: Left Channel Line Output
* ROUT: Right Channel Line Output
* LHPOUT: Left Channel Headphone Output
* RHPOUT: Right Channel Headphone Output
* LLINEIN: Left Channel Line Input
* RLINEIN: Right Channel Line Input
* MICIN: Microphone Input