ASoC: dt-bindings: Document routing strings for

Merge series from Jihed Chaibi <jihed.chaibi.dev@gmail.com>:

The series adds pin names for the es8316, wm8960, and nau8825
codecs to their respective binding files to improve the user
experience for board developers.

Documentation/devicetree/bindings/sound/everest,es8316.yaml

@@ -12,6 +12,22 @@ maintainers:
   - Matteo Martelli <matteomartelli3@gmail.com>
   - Binbin Zhou <zhoubinbin@loongson.cn>
 
+description: |
+  Everest ES8311, ES8316 and ES8323 audio CODECs
+
+  Pins on the device (for linking into audio routes):
+
+    Outputs:
+      * LOUT:     Left Analog Output
+      * ROUT:     Right Analog Output
+      * MICBIAS:  Microphone Bias
+
+    Inputs:
+      * MIC1P:    Microphone 1 Positive Analog Input
+      * MIC1N:    Microphone 1 Negative Analog Input
+      * MIC2P:    Microphone 2 Positive Analog Input
+      * MIC2N:    Microphone 2 Negative Analog Input
+
 allOf:
   - $ref: dai-common.yaml#
 

Documentation/devicetree/bindings/sound/nuvoton,nau8825.yaml

@@ -9,6 +9,20 @@ title: NAU8825 audio CODEC
 maintainers:
   - John Hsu <KCHSU0@nuvoton.com>
 
+description: |
+  NAU8825 audio CODEC
+
+  Pins on the device (for linking into audio routes):
+
+    Outputs:
+      * HPOL    : Headphone Left Output
+      * HPOR    : Headphone Right Output
+      * MICBIAS : Microphone Bias Output
+
+    Inputs:
+      * MICP    : Analog Microphone Positive Input
+      * MICN    : Analog Microphone Negative Input
+
 allOf:
   - $ref: dai-common.yaml#
 

Documentation/devicetree/bindings/sound/wlf,wm8960.yaml

@@ -9,6 +9,28 @@ title: Wolfson WM8960 audio codec
 maintainers:
   - patches@opensource.cirrus.com
 
+description: |
+  Wolfson WM8960 audio codec
+
+  Pins on the device (for linking into audio routes):
+
+    Outputs:
+      * HP_L    : Left Headphone/Line Output
+      * HP_R    : Right Headphone/Line Output
+      * SPK_LP  : Left Speaker Output (Positive)
+      * SPK_LN  : Left Speaker Output (Negative)
+      * SPK_RP  : Right Speaker Output (Positive)
+      * SPK_RN  : Right Speaker Output (Negative)
+      * OUT3    : Mono, Left, Right or buffered midrail output for capless mode
+
+    Inputs:
+      * LINPUT1 : Left single-ended or negative differential microphone input
+      * RINPUT1 : Right single-ended or negative differential microphone input
+      * LINPUT2 : Left line input or positive differential microphone input
+      * RINPUT2 : Right line input or positive differential microphone input
+      * LINPUT3 : Left line input, positive differential microphone, or Jack Detect 2
+      * RINPUT3 : Right line input, positive differential microphone, or Jack Detect 3
+
 properties:
   compatible:
     const: wlf,wm8960