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authorRobert Jarzmik <robert.jarzmik@free.fr>2018-06-22 21:28:33 +0200
committerTakashi Iwai <tiwai@suse.de>2018-06-25 10:03:22 +0200
commitcc51574ad2632dde790241129617bb97f46f7c85 (patch)
treeb27a41ae9b251e0ca062ae03d04f2b01d1f54875 /Documentation
parentce397d215ccd07b8ae3f71db689aedb85d56ab40 (diff)
ALSA: ac97: add bus binding for codecs
Add the generic ac97 bus binding, especially for ac97 codecs discovered by ac97 hardware probing. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/sound/ac97-bus.txt32
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+Generic AC97 Device Properties
+
+This documents describes the devicetree bindings for an ac97 controller child
+node describing ac97 codecs.
+
+Required properties:
+-compatible : Must be "ac97,vendor_id1,vendor_id2
+ The ids shall be the 4 characters hexadecimal encoding, such as
+ given by "%04x" formatting of printf
+-reg : Must be the ac97 codec number, between 0 and 3
+
+Example:
+ac97: sound@40500000 {
+ compatible = "marvell,pxa270-ac97";
+ reg = < 0x40500000 0x1000 >;
+ interrupts = <14>;
+ reset-gpios = <&gpio 95 GPIO_ACTIVE_HIGH>;
+ #sound-dai-cells = <1>;
+ pinctrl-names = "default";
+ pinctrl-0 = < &pinctrl_ac97_default >;
+ clocks = <&clks CLK_AC97>, <&clks CLK_AC97CONF>;
+ clock-names = "AC97CLK", "AC97CONFCLK";
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+ audio-codec@0 {
+ reg = <0>;
+ compatible = "ac97,574d,4c13";
+ clocks = <&fixed_wm9713_clock>;
+ clock-names = "ac97_clk";
+ }
+};