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Message-Id: <20180621154356.5438-1-robert.jarzmik@free.fr>
Date: Thu, 21 Jun 2018 17:43:55 +0200
From: Robert Jarzmik <robert.jarzmik@...e.fr>
To: Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc: alsa-devel@...a-project.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
Robert Jarzmik <robert.jarzmik@...e.fr>
Subject: [PATCH 1/2] 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@...e.fr>
---
.../devicetree/bindings/sound/ac97-bus.txt | 32 ++++++++++++++++++++++
1 file changed, 32 insertions(+)
create mode 100644 Documentation/devicetree/bindings/sound/ac97-bus.txt
diff --git a/Documentation/devicetree/bindings/sound/ac97-bus.txt b/Documentation/devicetree/bindings/sound/ac97-bus.txt
new file mode 100644
index 000000000000..103c428f2595
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/ac97-bus.txt
@@ -0,0 +1,32 @@
+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@...00000 {
+ 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";
+ }
+};
--
2.11.0
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