From dfbf19c47a01eda5df4d476d64a273e1188ea5a1 Mon Sep 17 00:00:00 2001 From: Yao Zi Date: Thu, 18 Sep 2025 15:30:55 +0000 Subject: [PATCH] dt-bindings: PCI: dwc: rockchip: Add RK3528 variant RK3528 ships a PCIe Gen2x1 controller that operates in RC mode only. Since the SoC has no separate MSI controller, the one integrated in the DWC PCIe IP must be used, and thus its interrupt scheme is similar to variants found in RK3562 and RK3576. Older BSP code claimed its integrated MSI controller supports only 8 MSIs[1], but this has been changed in newer BSP[2] and testing proves the controller works correctly with more than 8 MSIs allocated, suggesting the controller should be compatible with the RK3568 variant. Hence, document its compatible string. Signed-off-by: Yao Zi Signed-off-by: Manivannan Sadhasivam Acked-by: Rob Herring (Arm) Acked-by: Heiko Stuebner Link: https://github.com/rockchip-linux/kernel/blob/792a7d4273a5/drivers/pci/controller/dwc/pcie-dw-rockchip.c#L1610-L1613 # [1] Link: https://github.com/rockchip-linux/kernel/blob/1ba51b059f25/drivers/pci/controller/dwc/pcie-dw-rockchip.c#L904-L906 # [2] Link: https://patch.msgid.link/20250918153057.56023-2-ziyao@disroot.org --- Documentation/devicetree/bindings/pci/rockchip-dw-pcie.yaml | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/devicetree/bindings/pci/rockchip-dw-pcie.yaml b/Documentation/devicetree/bindings/pci/rockchip-dw-pcie.yaml index 6c6d828ce9641..67f1a55020482 100644 --- a/Documentation/devicetree/bindings/pci/rockchip-dw-pcie.yaml +++ b/Documentation/devicetree/bindings/pci/rockchip-dw-pcie.yaml @@ -22,6 +22,7 @@ properties: - const: rockchip,rk3568-pcie - items: - enum: + - rockchip,rk3528-pcie - rockchip,rk3562-pcie - rockchip,rk3576-pcie - rockchip,rk3588-pcie @@ -78,6 +79,7 @@ allOf: compatible: contains: enum: + - rockchip,rk3528-pcie - rockchip,rk3562-pcie - rockchip,rk3576-pcie then: @@ -89,6 +91,7 @@ allOf: compatible: contains: enum: + - rockchip,rk3528-pcie - rockchip,rk3562-pcie - rockchip,rk3576-pcie then: -- 2.47.3