linux-kernel - [PATCH 1/8] dt-bindings: pci: xilinx-nwl: Add resets

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Message-Id: <20260203002128.935842-2-sean.anderson@linux.dev>
Date: Mon,  2 Feb 2026 19:21:21 -0500
From: Sean Anderson <sean.anderson@...ux.dev>
To: Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Vinod Koul <vkoul@...nel.org>,
	linux-phy@...ts.infradead.org
Cc: Krzysztof Wilczyński <kwilczynski@...nel.org>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Radhey Shyam Pandey <radhey.shyam.pandey@....com>,
	linux-kernel@...r.kernel.org,
	Michal Simek <michal.simek@....com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-pci@...r.kernel.org,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Rob Herring <robh@...nel.org>,
	Thippeswamy Havalige <thippeswamy.havalige@....com>,
	Manivannan Sadhasivam <mani@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Sean Anderson <sean.anderson@...ux.dev>,
	Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	devicetree@...r.kernel.org
Subject: [PATCH 1/8] dt-bindings: pci: xilinx-nwl: Add resets

Add resets so we can hold the bridge in reset while we perform phy
calibration.

Signed-off-by: Sean Anderson <sean.anderson@...ux.dev>
---

 .../devicetree/bindings/pci/xlnx,nwl-pcie.yaml  | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/xlnx,nwl-pcie.yaml b/Documentation/devicetree/bindings/pci/xlnx,nwl-pcie.yaml
index 9de3c09efb6e..7efb3dd9955f 100644
--- a/Documentation/devicetree/bindings/pci/xlnx,nwl-pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/xlnx,nwl-pcie.yaml
@@ -69,6 +69,18 @@ properties:
   power-domains:
     maxItems: 1
 
+  resets:
+    maxItems: 3
+
+  reset-names:
+    items:
+      - description: APB register block reset
+        const: cfg
+      - description: AXI-PCIe bridge reset
+        const: bridge
+      - description: PCIe MAC reset
+        const: ctrl
+
   iommus:
     maxItems: 1
 
@@ -117,6 +129,7 @@ examples:
     #include <dt-bindings/interrupt-controller/irq.h>
     #include <dt-bindings/phy/phy.h>
     #include <dt-bindings/power/xlnx-zynqmp-power.h>
+    #include <dt-bindings/reset/xlnx-zynqmp-resets.h>
     soc {
         #address-cells = <2>;
         #size-cells = <2>;
@@ -146,6 +159,10 @@ examples:
             msi-parent = <&nwl_pcie>;
             phys = <&psgtr 0 PHY_TYPE_PCIE 0 0>;
             power-domains = <&zynqmp_firmware PD_PCIE>;
+            resets = <&zynqmp_reset ZYNQMP_RESET_PCIE_CFG>,
+                     <&zynqmp_reset ZYNQMP_RESET_PCIE_BRIDGE>,
+                     <&zynqmp_reset ZYNQMP_RESET_PCIE_CTRL>;
+            reset-names = "cfg", "bridge", "ctrl";
             iommus = <&smmu 0x4d0>;
             pcie_intc: legacy-interrupt-controller {
                 interrupt-controller;
-- 
2.35.1.1320.gc452695387.dirty