[PATCH v2 2/4] dt-bindings: display: rockchip,lvds: add RK3568

[Rok Markovic <rok@kanardia.eu>]

The RK3568 LVDS transmitter has no register block of its own: it is
programmed entirely through the GRF and re-uses the MIPI DSI0 D-PHY
(rockchip,rk3568-dsi-dphy) in LVDS mode. It therefore takes the same
shape as px30: phys/phy-names, no reg, and no clock of its own.

Since the block exposes no MMIO, nothing in the LVDS path is clocked
from the DSI controller's APB clock; that gate is held off while LVDS
scans out. It has no analog supplies of its own and no pinctrl either:
the lanes are dedicated D-PHY pins, not muxable GPIOs.

Signed-off-by: Rok Markovic <rok@kanardia.eu>
Assisted-by: Claude:claude-opus-4-8
---
Changes in v2:
  - RK3568 now takes no clock (clocks/clock-names disabled, as for
    px30): the block has no register space, so nothing consumes the
    DSI controller's APB clock.

 .../display/rockchip/rockchip,lvds.yaml       | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,lvds.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,lvds.yaml
index 03b002a..b77d4fa 100644
--- a/Documentation/devicetree/bindings/display/rockchip/rockchip,lvds.yaml
+++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,lvds.yaml
@@ -15,6 +15,7 @@ properties:
     enum:
       - rockchip,px30-lvds
       - rockchip,rk3288-lvds
+      - rockchip,rk3568-lvds
 
   reg:
     maxItems: 1
@@ -121,6 +122,27 @@ allOf:
         - avdd1v8-supply
         - avdd3v3-supply
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: rockchip,rk3568-lvds
+
+    then:
+      properties:
+        reg: false
+        clocks: false
+        clock-names: false
+        avdd1v0-supply: false
+        avdd1v8-supply: false
+        avdd3v3-supply: false
+        pinctrl-names: false
+        pinctrl-0: false
+
+      required:
+        - phys
+        - phy-names
+
 additionalProperties: false
 
 examples:
-- 
2.43.0