[PATCH 2/5] dt-bindings: mfd: rk809: Add missing audio codec properties

[Cristian Ciocaltea <cristian.ciocaltea@collabora.com>]

The RK809 MFD provides a RK817 compatible audio codec, supported by the
rk817_codec driver.

This has been already in use by several boards: rk3566-quartz64-b,
k3566-roc-pc, rk3568-evb1-v10, rk3568-lubancat-2, rk3568-odroid-m1,
rk3568-rock-3a.  However, dtbs_check fails for all of them:

  DTC_CHK arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dtb
  rk3568-rock-3a.dtb: pmic@20: '#sound-dai-cells', 'assigned-clock-parents', 'assigned-clocks', 'clock-names', 'clocks', 'codec' do not match any of the regexes: 'pinctrl-[0-9]+'
    from schema $id: http://devicetree.org/schemas/mfd/rockchip,rk809.yaml#

Document the missing audio codec properties as found on the
rockchip,rk817 schema.

Fixes: 6c38ca03406e ("dt-bindings: mfd: rk808: Convert bindings to yaml")
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
---
 .../devicetree/bindings/mfd/rockchip,rk809.yaml    | 30 +++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/mfd/rockchip,rk809.yaml b/Documentation/devicetree/bindings/mfd/rockchip,rk809.yaml
index a327d73f3c43..cadfb5f1c631 100644
--- a/Documentation/devicetree/bindings/mfd/rockchip,rk809.yaml
+++ b/Documentation/devicetree/bindings/mfd/rockchip,rk809.yaml
@@ -12,7 +12,7 @@ maintainers:
 
 description: |
   Rockchip RK809 series PMIC. This device consists of an i2c controlled MFD
-  that includes regulators, an RTC, and power button.
+  that includes regulators, an RTC, a power button and an audio codec.
 
 properties:
   compatible:
@@ -93,6 +93,34 @@ properties:
         unevaluatedProperties: false
     unevaluatedProperties: false
 
+  clocks:
+    description:
+      The input clock for the audio codec.
+
+  clock-names:
+    description:
+      The clock name for the codec clock.
+    items:
+      - const: mclk
+
+  '#sound-dai-cells':
+    description:
+      Needed for the interpretation of sound dais.
+    const: 0
+
+  codec:
+    description: |
+      The child node for the codec to hold additional properties. If no
+      additional properties are required for the codec, this node can be
+      omitted.
+    type: object
+    additionalProperties: false
+    properties:
+      rockchip,mic-in-differential:
+        type: boolean
+        description:
+          Describes if the microphone uses differential mode.
+
 allOf:
   - if:
       properties:

-- 
2.45.2