[PATCH v2 1/5] dt-bindings: phy: rockchip: rk3399-typec-phy: Support mode-switch

Chaoyi Chen
2025-07-18T06:37:46Z

From: Chaoyi Chen <chaoyi.chen@rock-chips.com>

The RK3399 has two USB/DP combo PHY. With the help of external Type-C
controller, the PHY can switch altmode between USB and DP.

Their connection diagram is shown below:

external Type-C Chip0 ---> USB/DP PHY0 ---+
| <----> CDN-DP controller
external Type-C Chip1 ---> USB/DP PHY1 ---+

This patch add new "mode-switch" property for dp-port to indicate
whether the PHY can handle altmode switching.

Signed-off-by: Chaoyi Chen <chaoyi.chen@rock-chips.com>
---

Changes in v2:
- Reuse dp-port/usb3-port in rk3399-typec-phy binding.

.../devicetree/bindings/phy/rockchip,rk3399-typec-phy.yaml | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/rockchip,rk3399-typec-phy.yaml b/Documentation/devicetree/bindings/phy/rockchip,rk3399-typec-phy.yaml
index 91c011f68cd0..d503de7c7569 100644
--- a/Documentation/devicetree/bindings/phy/rockchip,rk3399-typec-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/rockchip,rk3399-typec-phy.yaml
@@ -51,6 +51,10 @@ properties:
'#phy-cells':
const: 0

+ mode-switch:
+ description: Flag the port as possible handler of altmode switching
+ type: boolean
+
port:
$ref: /schemas/graph.yaml#/properties/port
description: Connection to USB Type-C connector
--
2.49.0