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client-ip=165.204.84.17; helo=satlexmb07.amd.com; pr=C Received: from satlexmb07.amd.com (165.204.84.17) by SN1PEPF00026367.mail.protection.outlook.com (10.167.241.132) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.315.6 via Frontend Transport; Fri, 7 Aug 2026 12:35:23 +0000 Received: from satlexmb07.amd.com (10.181.42.216) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.41; Fri, 7 Aug 2026 07:35:22 -0500 Received: from xhdlc250064.xilinx.com (10.180.168.240) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server id 15.2.2562.41 via Frontend Transport; Fri, 7 Aug 2026 07:35:18 -0500 From: Sai Krishna Musham To: , , , , , , , CC: , , , , , , Subject: [PATCH v8 1/2] dt-bindings: PCI: xilinx-versal-cpm: Add PERST# and reset support Date: Fri, 7 Aug 2026 18:05:06 +0530 Message-ID: <20260807123507.3418671-2-sai.krishna.musham@amd.com> X-Mailer: git-send-email 2.44.4 In-Reply-To: <20260807123507.3418671-1-sai.krishna.musham@amd.com> References: <20260807123507.3418671-1-sai.krishna.musham@amd.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF00026367:EE_|IA0PR12MB7773:EE_ X-MS-Office365-Filtering-Correlation-Id: 14e38f52-2cb0-4f4c-36e6-08def48059b5 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|36860700016|82310400026|376014|7416014|23010399003|18002099003|22082099003|11063799006|56012099006|3023799007|13003099007|10067099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: hIuBh/CNgbYVHaBSe6krSnnqZCYZSULDN9Zoj3rsDsLQxk+S3RS8ZXFyNS2X7wSDmV0iaEj9cv/k7KCiO9RAOaF+2NUHyk9QQ2HLDVo3hT5DGeMF0nMuLSWZYmPc5X6GjiNlxMUg+57jEXIPf6P8ileOAkT0XD2Bm241hnmsZkUyBY2zfOzQi4Oa1tIHHE2pUO6mv5eoRwtixOu5UUz2cSaPvcdDV1DHo2XDdtQuJj3E7+Xlhi9dDPw3kWLmSjZFkS2qpR9V5/YpsYvRujzjGzUghgU0VozwNMNhq8SuycATzkwQSDuScgjQsYhmivn84C1Yaz5IS9b54M/3Z+YAEi2w5PlWuV1k0O58qjk/OzYcGsSQexLZxMnYbOEUcnPqbTStZcZZeYc8NeOn5pCtZrm317QELq0LxHt40W1eeU7lAkD/3uEHeFmTNZW283V+ X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Aug 2026 12:35:23.0563 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 14e38f52-2cb0-4f4c-36e6-08def48059b5 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF00026367.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB7773 Add the optional 'resets' property to manage the PCIe IP reset, and the 'reset-gpios' property on the Root Port child node for GPIO-based control of the PCIe RP PERST# signal (assert/deassert). Both are optional to keep backward compatibility with existing device trees. Update the examples to show the reset controller and PERST# GPIO wiring. Signed-off-by: Sai Krishna Musham --- Changes in v8: - Add resets property. - Move reset-gpios property to child node and update the example. v1: https://lore.kernel.org/all/20250224063046.1438006-2-sai.krishna.musham@amd.com/ v2: https://lore.kernel.org/all/20250226124358.88227-2-sai.krishna.musham@amd.com/ v3: https://lore.kernel.org/all/20250227042454.907182-2-sai.krishna.musham@amd.com/ v4: https://lore.kernel.org/all/20250318092648.2298280-2-sai.krishna.musham@amd.com/ v5: https://lore.kernel.org/all/20250321114211.2185782-2-sai.krishna.musham@amd.com/ v6: https://lore.kernel.org/all/20250326022811.3090688-2-sai.krishna.musham@amd.com/ v7: https://lore.kernel.org/all/20250414032304.862779-2-sai.krishna.musham@amd.com/ --- .../bindings/pci/xilinx-versal-cpm.yaml | 38 +++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/Documentation/devicetree/bindings/pci/xilinx-versal-cpm.yaml b/Documentation/devicetree/bindings/pci/xilinx-versal-cpm.yaml index 9823456addea..a28a88dc8e88 100644 --- a/Documentation/devicetree/bindings/pci/xilinx-versal-cpm.yaml +++ b/Documentation/devicetree/bindings/pci/xilinx-versal-cpm.yaml @@ -41,6 +41,10 @@ properties: description: Maps a Requester ID to an MSI controller and associated MSI sideband data. + resets: + description: Reset for the PCIe controller. + maxItems: 1 + ranges: maxItems: 2 @@ -61,6 +65,17 @@ properties: interrupt-controller: true +patternProperties: + '^pcie@[0-2],0$': + type: object + $ref: /schemas/pci/pci-pci-bridge.yaml# + + properties: + reg: + maxItems: 1 + + unevaluatedProperties: false + required: - reg - reg-names @@ -76,6 +91,9 @@ unevaluatedProperties: false examples: - | + #include + #include + versal { #address-cells = <2>; #size-cells = <2>; @@ -99,6 +117,16 @@ examples: reg = <0x0 0xfca10000 0x0 0x1000>, <0x6 0x00000000 0x0 0x10000000>; reg-names = "cpm_slcr", "cfg"; + resets = <&versal_reset VERSAL_RST_PCIE_CORE0>; + + pcie@0,0 { + device_type = "pci"; + reg = <0x0 0x0 0x0 0x0 0x0>; + reset-gpios = <&gpio1 38 GPIO_ACTIVE_LOW>; + #address-cells = <3>; + #size-cells = <2>; + ranges; + }; pcie_intc_0: interrupt-controller { #address-cells = <0>; #interrupt-cells = <1>; @@ -127,6 +155,16 @@ examples: <0x06 0x00000000 0x00 0x1000000>, <0x00 0xfce20000 0x00 0x1000000>; reg-names = "cpm_slcr", "cfg", "cpm_csr"; + resets = <&versal_reset VERSAL_RST_PCIE_CORE0>; + + pcie@0,0 { + device_type = "pci"; + reg = <0x0 0x0 0x0 0x0 0x0>; + reset-gpios = <&gpio1 38 GPIO_ACTIVE_LOW>; + #address-cells = <3>; + #size-cells = <2>; + ranges; + }; pcie_intc_1: interrupt-controller { #address-cells = <0>; -- 2.44.4