[PATCH v3 1/4] dt-bindings: arm: rockchip: Update ROCKPi 4 binding

[Jagan Teki]

ROCKPi 4 has 3 variants of hardware platforms called
ROCKPi 4A, 4B, and 4C.

- ROCKPi 4A has no Wif/BT.
- ROCKPi 4B has AP6256 Wifi/BT, PoE.
- ROCKPi 4C has AP6256 Wifi/BT, PoE, miniDP, USB Host enabled
  GPIO pin change compared to 4B, 4C

So, update the existing ROCKPi 4 binding to support
ROCKPi 4A/B/C hardware platforms.

Signed-off-by: Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx>
---
Changes for v3:
- new patch

 Documentation/devicetree/bindings/arm/rockchip.yaml | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/arm/rockchip.yaml b/Documentation/devicetree/bindings/arm/rockchip.yaml
index db2e35796795..e6f656b0bd56 100644
--- a/Documentation/devicetree/bindings/arm/rockchip.yaml
+++ b/Documentation/devicetree/bindings/arm/rockchip.yaml
@@ -430,8 +430,12 @@ properties:
           - const: radxa,rock
           - const: rockchip,rk3188
 
-      - description: Radxa ROCK Pi 4
+      - description: Radxa ROCK Pi 4A/B/C
         items:
+          - enum:
+              - const: radxa,rockpi4a
+              - const: radxa,rockpi4b
+              - const: radxa,rockpi4c
           - const: radxa,rockpi4
           - const: rockchip,rk3399
 
-- 
2.25.1