This update patch will split the DT node into old style and new style:
The new style will will be easier to add muti DAI links from old single
DAI link DTs.
This patch will maintian compatibility with the old DTs.
Signed-off-by: Xiubo Li <Li.Xiubo@xxxxxxxxxxxxx>
---
.../devicetree/bindings/sound/simple-card.txt | 184 ++++++++++++++-------
1 file changed, 126 insertions(+), 58 deletions(-)
diff --git a/Documentation/devicetree/bindings/sound/simple-card.txt b/Documentation/devicetree/bindings/sound/simple-card.txt
index c2e9841..6fb8966 100644
--- a/Documentation/devicetree/bindings/sound/simple-card.txt
+++ b/Documentation/devicetree/bindings/sound/simple-card.txt
@@ -1,15 +1,19 @@
-Simple-Card:
+Device-Tree bindings for Simple Card
Simple-Card specifies audio DAI connections of SoC <-> codec.
-Required properties:
+=== Top level's properties and subnodes ===
+*** Required properties ***
- compatible : "simple-audio-card"
-Optional properties:
-
+*** Optional properties ***
- simple-audio-card,name : User specified audio sound card name, one string
property.
+- simple-audio-card,format : CPU/CODEC common audio format.
+ "i2s", "right_j", "left_j" , "dsp_a"
+ "dsp_b", "ac97", "pdm", "msb", "lsb"
+ (This is used for single DAI link & old style.)
- simple-audio-card,widgets : Please refer to widgets.txt.
- simple-audio-card,routing : A list of the connections between audio components.
Each entry is a pair of strings, the first being the
@@ -17,63 +21,85 @@ Optional properties:
source.
- simple-audio-card,mclk-fs : Multiplication factor between stream rate and codec
mclk.
-
-Optional subnodes:
-
-- simple-audio-card,dai-link : Container for dai-link level
- properties and the CPU and CODEC
- sub-nodes. This container may be
- omitted when the card has only one
- DAI link. See the examples and the
- section bellow.
-
-Dai-link subnode properties and subnodes:
-
-If dai-link subnode is omitted and the subnode properties are directly
-under "sound"-node the subnode property and subnode names have to be
-prefixed with "simple-audio-card,"-prefix.
-
-Required dai-link subnodes:
-
-- cpu : CPU sub-node
-- codec : CODEC sub-node
-
-Optional dai-link subnode properties:
-
+- simple-audio-card,frame-master : Indicates DAI link frame master. One phandle to a cpu
+ or codec subnode.
+ (This is used for single DAI link & old style.)
+- simple-audio-card,bitclock-master : Indicates DAI link bit clock master. One phandle to a
+ cpu or codec subnode.
+ (This is used for single DAI link & old style.)
+
+*** Optional subnodes ***
+- simple-audio-card,dai-link : Container for DAI link level properties and the CPU
+ and CODEC sub-nodes. This container may be omitted
+ when the card has only one DAI link and using the old
+ style. See the examples and the section bellow.
+- simple-audio-card,cpu : CPU DAI sub-node.
+ (This is used for single DAI link & old style.)
+- simple-audio-card,codec : CODEC DAI sub-node.
+ (This is used for single DAI link & old style.)
+
+=== DAI link node's properties and its subnodes ===
+
+*** Required subnodes ***
+- cpu : CPU DAI sub-node
+- codec : CODEC DAI sub-node
+
+*** Optional properties ***
- format : CPU/CODEC common audio format.
"i2s", "right_j", "left_j" , "dsp_a"
"dsp_b", "ac97", "pdm", "msb", "lsb"
-- frame-master : Indicates dai-link frame master.
- phandle to a cpu or codec subnode.
-- bitclock-master : Indicates dai-link bit clock master.
- phandle to a cpu or codec subnode.
-- bitclock-inversion : bool property. Add this if the
- dai-link uses bit clock inversion.
-- frame-inversion : bool property. Add this if the
- dai-link uses frame clock inversion.
+- frame-master : Indicates DAI link frame master. One phandle to a cpu
+ or codec subnode.
+ (This is One boolean property for old style.)
+- bitclock-master : Indicates DAI link bit clock master. One phandle to a
+ cpu or codec subnode.
+ (This is one boolean property for old style.)
For backward compatibility the frame-master and bitclock-master
properties can be used as booleans in codec subnode to indicate if the
-codec is the dai-link frame or bit clock master. In this case there
-should be no dai-link node, the same properties should not be present
+codec is the DAI link frame or bit clock master. In this case there
+should be no DAI link node, the same properties should not be present
at sound-node level, and the bitclock-inversion and frame-inversion
properties should also be placed in the codec node if needed.
-Required CPU/CODEC subnodes properties:
-- sound-dai : phandle and port of CPU/CODEC
+=== CPU/CODEC DAI node's properties and its subnodes ===
-Optional CPU/CODEC subnodes properties:
+*** Required properties ***
+- sound-dai : One phandle and port of CPU/CODEC
+*** Optional properties ***
+- bitclock-inversion : Boolean property. Add this if the DAI device uses bit
+ clock inversion.
+- frame-inversion : Boolean property. Add this if the DAI device uses frame
+ clock inversion.
- dai-tdm-slot-num : Please refer to tdm-slot.txt.
- dai-tdm-slot-width : Please refer to tdm-slot.txt.
-- clocks / system-clock-frequency : specify subnode's clock if needed.
- it can be specified via "clocks" if system has
- clock node (= common clock), or "system-clock-frequency"
- (if system doens't support common clock)
+- clocks / system-clock-frequency : specify CPU/CODEC DAI node's clock if needed. It can be
+ specified via "clocks" if system has clock node
+ (= common clock), or "system-clock-frequency"(if system
+ doens't support common clock)
-Example 1 - single DAI link:
+=== Examples ===
+*** CPU & CODEC DAI DT nodes ***
+&i2c0 {
+ ak4648: ak4648@12 {
+ #sound-dai-cells = <0>;
+ compatible = "asahi-kasei,ak4648";
+ reg = <0x12>;
+ };
+};
+sh_fsi2: sh_fsi2@ec230000 {
+ #sound-dai-cells = <1>;
+ compatible = "renesas,sh_fsi2";
+ reg = <0xec230000 0x400>;
+ interrupt-parent = <&gic>;
+ interrupts = <0 146 0x4>;
+};
+
+Example 1 - single DAI link & old style:
+bitclock-master and frame-master as phandles.
sound {
compatible = "simple-audio-card";
simple-audio-card,name = "VF610-Tower-Sound-Card";
@@ -91,6 +117,7 @@ sound {
simple-audio-card,cpu {
sound-dai = <&sh_fsi2 0>;
+ bitclock-inversion;
};
dailink0_master: simple-audio-card,codec {
@@ -99,24 +126,64 @@ sound {
};
};
-&i2c0 {
- ak4648: ak4648@12 {
- #sound-dai-cells = <0>;
- compatible = "asahi-kasei,ak4648";
- reg = <0x12>;
+Example 2 - single DAI link & old style:
+bitclock-master and frame-master as boolean properties.
+sound {
+ compatible = "simple-audio-card";
+ simple-audio-card,name = "VF610-Tower-Sound-Card";
+ simple-audio-card,format = "left_j";
+ simple-audio-card,widgets =
+ "Microphone", "Microphone Jack",
+ "Headphone", "Headphone Jack",
+ "Speaker", "External Speaker";
+ simple-audio-card,routing =
+ "MIC_IN", "Microphone Jack",
+ "Headphone Jack", "HP_OUT",
+ "External Speaker", "LINE_OUT";
+
+ simple-audio-card,cpu {
+ sound-dai = <&sh_fsi2 0>;
};
-};
-sh_fsi2: sh_fsi2@ec230000 {
- #sound-dai-cells = <1>;
- compatible = "renesas,sh_fsi2";
- reg = <0xec230000 0x400>;
- interrupt-parent = <&gic>;
- interrupts = <0 146 0x4>;
+ simple-audio-card,codec {
+ sound-dai = <&ak4648>;
+ clocks = <&osc>;
+ bitclock-master;
+ frame-master;
+ bitclock-inversion;
+ };
};
-Example 2 - many DAI links:
+Example 3 - single DAI link & new style:
+sound {
+ compatible = "simple-audio-card";
+ simple-audio-card,name = "VF610-Tower-Sound-Card";
+ simple-audio-card,widgets =
+ "Microphone", "Microphone Jack",
+ "Headphone", "Headphone Jack",
+ "Speaker", "External Speaker";
+ simple-audio-card,routing =
+ "MIC_IN", "Microphone Jack",
+ "Headphone Jack", "HP_OUT",
+ "External Speaker", "LINE_OUT";
+
+ simple-audio-card,dai-link {
+ format = "i2s";
+ bitclock-master = <&dailink0_master>;
+ frame-master = <&dailink0_master>;
+ cpu {
+ sound-dai = <&sh_fsi2 0>;
+ frame-inversion;
+ };
+ dailink0_master: codec {
+ sound-dai = <&ak4648>;
+ clocks = <&osc>;
+ frame-inversion;
+ };
+ };
+};
+Example 4 - many DAI links:
sound {
compatible = "simple-audio-card";
simple-audio-card,name = "Cubox Audio";
@@ -128,6 +195,7 @@ sound {
};
codec {
sound-dai = <&tda998x 0>;
+ frame-inversion;
};
};
--
1.8.4
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