[PATCH 1/3] ASoC: dt-bindings: everest,es8316: Document routing strings

[Jihed Chaibi <jihed.chaibi.dev@gmail.com>]

The es8316 driver defines several DAPM widget names that are used for
audio routing in the device tree. However, these strings are not
documented in the binding file.

This forces developers to read the C source to discover the valid
names, which can be inefficient and error-prone.

Add a list of the input and output widget names to the binding's
description to make it self-contained and improve the user
experience for board bring-up.

Signed-off-by: Jihed Chaibi <jihed.chaibi.dev@gmail.com>
---
 .../devicetree/bindings/sound/everest,es8316.yaml  | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/everest,es8316.yaml b/Documentation/devicetree/bindings/sound/everest,es8316.yaml
index e4b2eb5fa..cd073dd0c 100644
--- a/Documentation/devicetree/bindings/sound/everest,es8316.yaml
+++ b/Documentation/devicetree/bindings/sound/everest,es8316.yaml
@@ -12,6 +12,20 @@ maintainers:
   - Matteo Martelli <matteomartelli3@gmail.com>
   - Binbin Zhou <zhoubinbin@loongson.cn>
 
+description: |
+  Everest ES8311, ES8316 and ES8323 audio CODECs
+
+  Valid routing names defined in the driver for this codec include:
+
+    Outputs:
+      * HPOL: Left Headphone Output
+      * HPOR: Right Headphone Output
+
+    Inputs:
+      * DMIC: Digital Microphone Input
+      * MIC1: Analog Microphone Input 1
+      * MIC2: Analog Microphone Input 2
+
 allOf:
   - $ref: dai-common.yaml#
 
-- 
2.39.5