From nobody Sun Feb 8 13:38:41 2026 Received: from NAM04-DM6-obe.outbound.protection.outlook.com (mail-dm6nam04on2078.outbound.protection.outlook.com [40.107.102.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B65DC2BCF6B; Tue, 29 Apr 2025 09:01:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.102.78 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745917266; cv=fail; b=M5OSqyMJwpAt9FVBprHEo5DP0HfmLeQcDkJ6PLWq7xGz5//ZCDBWxRDPJBzcCVkjed5Z+GJPxlXx2FV+Bdkb4ujgRZvb9HYAyFPWjZh2SG5DsGlDnSbMec4yZRwlK5MIOo8eKI6MkSM1WZSB4bysRk1cMFzzFuQAZvON1IgFwxg= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745917266; c=relaxed/simple; bh=/q3gDmhJOHnx1BVm5HZLbW6RQIx1sECTIr+BMnVIEZQ=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=omeII1uFimE+ey+oRoElktT20Yto5WmmPCS7KW2+78lrQtObLRVB2n6JOrCBJ0iAfQ1QQAjoDVpHMrkQj4QSufIWGg0+TeDhFbwqHuzLoO7wAAerS2JiPOyqcJ089XYjUwkCGleIL/6WtjdAbh9ldmNjLKXaQGD8AfkSXjFlgyo= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com; spf=fail smtp.mailfrom=amd.com; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b=KmPcXeQT; arc=fail smtp.client-ip=40.107.102.78 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=amd.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b="KmPcXeQT" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=kBc+jHojp3GF8/xbcr4G1lB0bLl1VFqjBD0bCDOQxW5LjYNiwV1ksqYmBKj0ReyW7zR9HDejgrCVtNllwpyK8riSdgxK+XnOhmLhIvoVs9RHpAuYUffy0k5WcxnwCCM/qv/B/isz536SRCxSg35gacXf/NUSLK9ntIXf6nJbxcWzXXmumnTsALU9L4wU5Y2FT5rk4SX/TMy36RhSq5SoG41Zskr8tPQXKVP7eGCJBy7/KN8qtS3tGOWrywlYYnudr9Nv9yybNzLE+x8PD79/mazGsmkUwxkIspHsKH6K7dad5agsMyjv9sfDHreaZ7HRm+11GQArmVaETUmmx2cqqw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=KUS0DCft0mKujPvLIKdsDTWW6XcV6N60Or9qUGdXLYg=; b=TYQi9KdaUeYc2mb96Q15GU7VP5DERziXNS0eLWacd99iogE7P58+PDkY4TdHoMA7WDzh3JOdpXT7hchAQh5p1NBT/UYA88Sho1VlPn4oe/DMgGnbCkgVXdMH4Ix5HKMbdFIBLrDO3t3i5EJu2eWvCIvXzxNtptzY5d7n7c6hs8CISbOsXkVsPgB68vt8Kdz6EhThnK0HnYtH8g2kb+LdybgdgCAGDHc25OVa4e4E1qdBMofGSsr7TgOyhauLTNRwEw7I3rVFCGJs1CKX7RQUQFCIyBm6mciY/+Wh+7e534VBVwiMhbr1CNY2f3OkaevmGcOTrk4U61V7njnSBsCSvw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=google.com smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=KUS0DCft0mKujPvLIKdsDTWW6XcV6N60Or9qUGdXLYg=; b=KmPcXeQTd4TXYb96XT3SIrXYmgU+5qWfy6EIAOXra58ucPfqIKaULS7wawEftGuibLUIZtYufojupRH1529EF/Lk/5UPQxXynFVc/UVF0ZiYoLV+kxta7IvbcbbmsJrEsWnaxtpT6Dhd4KKYZJtk5VvdSqNlk8oBHtF/2D7QfaE= Received: from BLAPR03CA0151.namprd03.prod.outlook.com (2603:10b6:208:32f::15) by SA3PR12MB7973.namprd12.prod.outlook.com (2603:10b6:806:305::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8678.27; Tue, 29 Apr 2025 09:01:00 +0000 Received: from BN2PEPF000044A1.namprd02.prod.outlook.com (2603:10b6:208:32f:cafe::2a) by BLAPR03CA0151.outlook.office365.com (2603:10b6:208:32f::15) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.8655.39 via Frontend Transport; Tue, 29 Apr 2025 09:01:00 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BN2PEPF000044A1.mail.protection.outlook.com (10.167.243.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8699.20 via Frontend Transport; Tue, 29 Apr 2025 09:01:00 +0000 Received: from SATLEXMB03.amd.com (10.181.40.144) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Tue, 29 Apr 2025 04:00:59 -0500 Received: from xhdlc201955.xilinx.com (10.180.168.240) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server id 15.1.2507.39 via Frontend Transport; Tue, 29 Apr 2025 04:00:55 -0500 From: Sai Krishna Musham To: , , , , , , , CC: , , , , , , Subject: [PATCH v2 1/2] dt-bindings: PCI: amd-mdb: Add `reset-gpios` property to example device tree Date: Tue, 29 Apr 2025 14:30:45 +0530 Message-ID: <20250429090046.1512000-2-sai.krishna.musham@amd.com> X-Mailer: git-send-email 2.44.1 In-Reply-To: <20250429090046.1512000-1-sai.krishna.musham@amd.com> References: <20250429090046.1512000-1-sai.krishna.musham@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: None (SATLEXMB04.amd.com: sai.krishna.musham@amd.com does not designate permitted sender hosts) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN2PEPF000044A1:EE_|SA3PR12MB7973:EE_ X-MS-Office365-Filtering-Correlation-Id: b167655f-9b67-459d-31b9-08dd86fc5cd0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|1800799024|36860700013|7416014|376014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?Jv3bFnRQjznRsprTy4+mzRisHCv1vbl/+TNnS0uMW7sMetcdewpwqj2xVy+M?= =?us-ascii?Q?FPcV1G+UY/QkcLbcNSfL7rRDXjvq53SU3CvEYgkyigHqguh/bMAq+CdHhUK0?= =?us-ascii?Q?Dr4oDTZ947yKqB8MP+i90RWWpcDQsW3sfxwuw4t0TY3IX0vm2U6VM1Mrs5+F?= =?us-ascii?Q?zRMOOm7eQtXYqJlLykl+mKPJnxmz3gco26dgdr7+Lb4+Rad9LZX3vUtZac5r?= =?us-ascii?Q?nlmtNaEvqlUF5XRWCRpNtDbQ+zJJXBuxSoTepeqxj1nV1kVKRslXCkvxRZX+?= =?us-ascii?Q?gLSrhTYNtzsqS6OoUZ/ju6aYXyTIlwOE2lq/oZqFm4utD3OC9i9Ra0LYgGuZ?= =?us-ascii?Q?MBhFgEBI1X87OIhOmL/9n5Y5WyPifUCnxcmwIkHSN3j3J32K0VTDoiqC07tr?= =?us-ascii?Q?lImcjs+y/kob5bfmHYvdQ83xpyilaVAuC8IkWtzrpwWsaEu8N59D9rEE7fFj?= =?us-ascii?Q?uK4ofExQmuITnchAFfNXcuLMOXTk80lBWq53mtNrecc477cJw0SJq4tBLiwV?= =?us-ascii?Q?FqgfjVb4a2X/f44mOp2o688lhArYsmbrlnC7aNVa2sVsJ++jDR80gdxuTwvm?= =?us-ascii?Q?1bshdHbNx2Tpj4RX8721jRVvg+6cAGU762lMYGsUnp/YifQzEjh4dAXaaroV?= =?us-ascii?Q?dVGIYRyGr5K4PetTOr82+MXOEdG5g1tJbZG+EdWLH87gVzs1iQf6EDELc1Wl?= =?us-ascii?Q?04ZX69yzJTWp55W20gUgWJiTDJLA5ffpeCcn2HrO3WQEpNk+PjZZHH00i8w3?= =?us-ascii?Q?kfyDdRmG2vwLz7LIhFKXZMMeUnZHbypIpe7CxgoqieKpGpTNO8dWveaOJrNw?= =?us-ascii?Q?ijU6UI8vYNGIqB+wgPGqUobpp/jjsORy8TMMsTa8HA9GghYv4+XxOtn28yi3?= =?us-ascii?Q?zAGRJAqkz9Cp8jlqO8LOnc10QoqM3pLsnLaLLWLNBzE8vwEh52zOg0kakjqT?= =?us-ascii?Q?YJxWXQf4HZntUBsbUsSvlgMRGAvwg5G5Vm5nf5GwzOJaO4TrFAOaQROdCA0g?= =?us-ascii?Q?BBGgHNoymQYCG3tTiaK+s8uNpXSI5zq5Kowquqh0c25xUAtDu0gguKeJl9Sz?= =?us-ascii?Q?eKKv6KDE1vOXyk4z0F7s27WZERyHmFmp8TzbFQfaOQcpLF+83MRn0O2Ogysj?= =?us-ascii?Q?HTBAkIElkODFlh3EJg2PtVL4UmZltRvcGXUbDNm2uLvWTU/ATwLcq2BkjNpJ?= =?us-ascii?Q?lpFl4vZBwzaX1AlbX3BEajOn9TbMQ/5PIbSIZMHfCc5jeaDKSwA17jD6UTrr?= =?us-ascii?Q?u8xTquenRMAUTzkV4w8EBVRpThcVpcu9cShtPoKudFYQE4OSnm3PHs6wX/bD?= =?us-ascii?Q?iJHSfrWrSCrVdVmdEXt4VzlkLwlnqTBALz5Iy1ty35wL4nWwcvvH0lGiHGr5?= =?us-ascii?Q?RLm5FHbODe8NqbLCVIqowMJpw1ZXN5o0TFS1camNM6BlnBCmBFET17SHxKEm?= =?us-ascii?Q?5/auTQiTLIsdaLyj6y4pgwrEFuWQ9bwsII7yn4MFBsyvRonVIGuZsgVAUj3k?= =?us-ascii?Q?xi0TLQSejU5nB8DAX/Z+g9NZ/PENVLAi1zSk?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(82310400026)(1800799024)(36860700013)(7416014)(376014);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Apr 2025 09:01:00.3069 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b167655f-9b67-459d-31b9-08dd86fc5cd0 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN2PEPF000044A1.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA3PR12MB7973 Content-Type: text/plain; charset="utf-8" Add `reset-gpios` property to the example device tree node for GPIO-based handling of the PCIe Root Port (RP) PERST# signal. Signed-off-by: Sai Krishna Musham --- Changes in v2: - Update commit message --- Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yam= l b/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml index 43dc2585c237..e6117d326279 100644 --- a/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml +++ b/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml @@ -87,6 +87,7 @@ examples: - | #include #include + #include =20 soc { #address-cells =3D <2>; @@ -112,6 +113,7 @@ examples: #size-cells =3D <2>; #interrupt-cells =3D <1>; device_type =3D "pci"; + reset-gpios =3D <&tca6416_u37 7 GPIO_ACTIVE_LOW>; pcie_intc_0: interrupt-controller { #address-cells =3D <0>; #interrupt-cells =3D <1>; --=20 2.44.1 From nobody Sun Feb 8 13:38:41 2026 Received: from NAM10-DM6-obe.outbound.protection.outlook.com (mail-dm6nam10on2048.outbound.protection.outlook.com [40.107.93.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 080A82BD5BF; Tue, 29 Apr 2025 09:01:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.93.48 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745917271; cv=fail; b=F3mW1AOL2EA9ELG6sSwIEnWezyfg3LbemV20pQ+20LQRwMyrrD6G0XqaBms/Jw8Yv8+szckvRHE9T/QB3Od0Xa4xbKCAgp8f3EATkz//AUXY+byxSSwCAyimPvXuIefW9NxPcJcRwduQA5tH5ZgENKhqRu18B6+SzO9DDXoM9yQ= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745917271; c=relaxed/simple; bh=GckNKdDr9Kvx7WEKG0XK/HTkOyd5f6moDbvdfeCqREc=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=qCPg7C1hJGxfGiY4L6m1IMZ7zvI9hKnPJRPJze133a7qAzPEWXX7Ngngf3uWW1inG6dJ+RspNDgKTtGK9QxdfblYgLNwt2DTh037m3U0evONHgXqMWmBR4wxmWOoHvRPXQn5fSgiiiYwhPiD6P0fLvWTRaJkZzK6SmP7750wWLw= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com; spf=fail smtp.mailfrom=amd.com; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b=zE6Qk84l; arc=fail smtp.client-ip=40.107.93.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=amd.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b="zE6Qk84l" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=IyD0DaJrVMpfj8EEKqnVoQe3lgldPgR40n1L4ljwCgNEH6nRMgGkgFTbOFnEi/OMHgnixuZaDPvhE+MZ1FwS9mIIruwETAahgmd2jDsy02cyy19gIEaZwJQ5zKJJ3/OhVpg0ub0RycUVHo/5cFAdwtsBcLijTJKu9iPH7B7EiGZhrn6SjPvTbXF4zu7AQN4sF2tF3fqgtD5SxNes3ea1HcJUX3CP09s6qkJ/+0/ABEZ5rCmYmzRxCNFZeNYySFIDbFDJSjn31tkeCMz+5o/SO5HoCpzgVxlZoRbFswpKI4rPr06hxPGBlw/BONfEYivJ6WdL0BjkezOke6/Z0zX5Lg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=N7nMRYTKe2AM33GuS7VMEbv1ayq+5Ia243eZXkrSAy0=; b=YF2CoI8zwQv3wQ9sPkI9MuQBBZPN4TdPF7nsrysiICCgcTLxhPq0g0F5+OIYg8NpXJReawiUZ7azO+zNxX3pqWHYNJw2JCqMJt/6UbpJzP0jyJmNULykSZYkRsuVARLgGJ71rzoHyzezr8iMXm9lFngYyfseHjsbCiw1R0cwi92GaTy5+JVkjIh5QqK50PuUCsY9Jk6NIurh9rsmuxcguWreFObaRWb0eXEQYvu7tBVaOJcUCvFTDHNfEIbk86CEaJ2MhHNIkdbXL+OxkhuFk9ABq9C6vWxumsozPsXaOqiHCVAsXBAcmxl+dBEGuIWG7UGz/al/yGRsRtMne3raAw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=google.com smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=N7nMRYTKe2AM33GuS7VMEbv1ayq+5Ia243eZXkrSAy0=; b=zE6Qk84lFDKeSgdS2/2h+/K5pURzGPoW8Q89im7bH+nL024I6m2WcaLan/H/L1Awh4RS527T8Qm3PsMD2+Qi8UFeL8XsByS0smFUM3Pb5rti9IOtRHrCVvpf1p4d18aeccJghe6q69+4G59RWZX15AEgpVIO7NyrTv2RRTL2UwA= Received: from BLAPR03CA0172.namprd03.prod.outlook.com (2603:10b6:208:32f::12) by IA0PR12MB8328.namprd12.prod.outlook.com (2603:10b6:208:3dd::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8678.29; Tue, 29 Apr 2025 09:01:05 +0000 Received: from BN2PEPF000044A1.namprd02.prod.outlook.com (2603:10b6:208:32f:cafe::25) by BLAPR03CA0172.outlook.office365.com (2603:10b6:208:32f::12) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.8655.40 via Frontend Transport; Tue, 29 Apr 2025 09:01:05 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BN2PEPF000044A1.mail.protection.outlook.com (10.167.243.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8699.20 via Frontend Transport; Tue, 29 Apr 2025 09:01:05 +0000 Received: from SATLEXMB03.amd.com (10.181.40.144) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Tue, 29 Apr 2025 04:01:04 -0500 Received: from xhdlc201955.xilinx.com (10.180.168.240) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server id 15.1.2507.39 via Frontend Transport; Tue, 29 Apr 2025 04:01:00 -0500 From: Sai Krishna Musham To: , , , , , , , CC: , , , , , , Subject: [PATCH v2 2/2] PCI: amd-mdb: Add support for PCIe RP PERST# signal handling Date: Tue, 29 Apr 2025 14:30:46 +0530 Message-ID: <20250429090046.1512000-3-sai.krishna.musham@amd.com> X-Mailer: git-send-email 2.44.1 In-Reply-To: <20250429090046.1512000-1-sai.krishna.musham@amd.com> References: <20250429090046.1512000-1-sai.krishna.musham@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: None (SATLEXMB04.amd.com: sai.krishna.musham@amd.com does not designate permitted sender hosts) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN2PEPF000044A1:EE_|IA0PR12MB8328:EE_ X-MS-Office365-Filtering-Correlation-Id: 11affb38-426d-490c-f023-08dd86fc5ffc X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|376014|36860700013|82310400026; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?7qX6NF4O2hS3PqYgJ1MG7u9ZyNLQwDNghDMv+zXwo9d7ccyv8gn3AaMD8NXJ?= =?us-ascii?Q?5E6GBJDwgVAQPKmHKIBN9xpzoMymSfftT9RzYbmUDQHPc/3gKdDYhmWuJl0w?= =?us-ascii?Q?jbwgbYoo0VLGl8DNXkjZMRUGvUL9J5SVAOmtWBobvoaR75U4p9RN+2WhvP1X?= =?us-ascii?Q?jWA3KbBRSDkMvM7uKYMYp82aJySjGZo68hLnteuGMwe6z/TPWp8SLoV0Xy/A?= =?us-ascii?Q?hI/KaB649ecg3ggOi51Xn2yqnBg+sYHRLjRRYtxc0VNZ647LDfCNUBrX/JpO?= =?us-ascii?Q?Sm33Q6cY0FYjwB3lX1OohTgQkbpNM2gyuPZe6zU1YswKqlTHFnuIiPGrag0H?= =?us-ascii?Q?aWbIz3g+Tka9ZNzVlJSwcHgiF7W1DfsWZuzItmmtF//YwzBk0nzHj14XYVDH?= =?us-ascii?Q?STbAumwy92BX0ZASU5P7g01itH07Nb1naXUxJEHqOwzPK5ItvxJZoIZDg5mq?= =?us-ascii?Q?QoQVkZ7wJRch89b0d8cMcSZoGVg7Rph2QBalNJoX00aoIqt7XELBJ0slyXIk?= =?us-ascii?Q?+ZHl9/aLfdig3oPRKdB7T94CBFqppD7343+llQuISKVropVDhpoLk1JyAb6p?= =?us-ascii?Q?wk8P/8mGzd72gEL8Z/1tf4OzhLg4CRi8pgoM5h3RJ761p+UCs235KGbh8NMA?= =?us-ascii?Q?Ux8u4C5EZAX/XXH63GC3XPB1GxbwhUYMvEYlvoygZnPz57lv7Lgh2bFLkFgF?= =?us-ascii?Q?yR2aAlLVdjRs+57xMGBezLMODkDB5spRtev0FRuM4vrtkt2d51xYETFrjvrf?= =?us-ascii?Q?URYZVlXvgwTjhWxES43RQCT7OvKSN+oDcqzj9hlOS5UnMMwabUV4sOFs8Zm0?= =?us-ascii?Q?3q1VHjaNb9rxzWh/8dQ81xWzxwOjrfUCK3P++nRzRFh+NVkPicZBa3QGjiiB?= =?us-ascii?Q?oUQm19Cx0/76OUJkiAnNCRV+kgka1mO7GMNt6edSYhU5LfqKhhYuLTzAn5YC?= =?us-ascii?Q?kC0ma9cbWVFji1mclUMULPlEga5i4SdUEd5U9W2p6PQp1rvfVIl5llJzUp0M?= =?us-ascii?Q?jHMKDVKU01Wck1IVm9paRJJZiVkPdSBEOcoW5NcZ7X1KvAj7OudUcGjM1m+9?= =?us-ascii?Q?6o9Oo/SMZdg3pMU2SSrcfcV57DaNLDlZ+HigqtbcopLsUSxnwMjq1ZguuFKB?= =?us-ascii?Q?OphvrF47qUbOMoomdcRLWIdu5woh2G312dX21wPkAzBf2cqmTlUyByNM2VqY?= =?us-ascii?Q?ynEAAG50QjbGCKFBYuPRW1ubnLp0FGheFqFyoVui+1PA7uh3myQUEhAIghLr?= =?us-ascii?Q?VuBDdkgJ/YhBTc8W0oNUfEr5DMBsCtM4kfQ8iRlQgRBcUleZGuIN1M5UMf+B?= =?us-ascii?Q?TtNznkHJprV6Ho9GghSyKNi0KW094MrbHi6MNz0CtINwHoLQDT4OIWa+eiyR?= =?us-ascii?Q?UTRkdry/SBNR8XChL7XQYddstrfh2+0IRE4Yubxyp4smaCyo/PHJqrzRSpzb?= =?us-ascii?Q?ozWeQNAE7WFt00NeVRHJJzIYNHCW09zbdt+6orlejtOk1HkVcb0icydJHARB?= =?us-ascii?Q?KZudERQYYHuR9eyeUkYYuEIXB1ZDg3aVknKF?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(1800799024)(7416014)(376014)(36860700013)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Apr 2025 09:01:05.6342 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 11affb38-426d-490c-f023-08dd86fc5ffc 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN2PEPF000044A1.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB8328 Content-Type: text/plain; charset="utf-8" Add GPIO based PERST# signal handling for AMD Versal Gen 2 MDB PCIe Root Port. Signed-off-by: Sai Krishna Musham --- Changes in v2: - Change delay to PCIE_T_PVPERL_MS --- drivers/pci/controller/dwc/pcie-amd-mdb.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-amd-mdb.c b/drivers/pci/contro= ller/dwc/pcie-amd-mdb.c index 4eb2a4e8189d..763265e86db5 100644 --- a/drivers/pci/controller/dwc/pcie-amd-mdb.c +++ b/drivers/pci/controller/dwc/pcie-amd-mdb.c @@ -18,6 +18,7 @@ #include #include =20 +#include "../../pci.h" #include "pcie-designware.h" =20 #define AMD_MDB_TLP_IR_STATUS_MISC 0x4C0 @@ -408,6 +409,7 @@ static int amd_mdb_add_pcie_port(struct amd_mdb_pcie *p= cie, struct dw_pcie *pci =3D &pcie->pci; struct dw_pcie_rp *pp =3D &pci->pp; struct device *dev =3D &pdev->dev; + struct gpio_desc *reset_gpio; int err; =20 pcie->slcr =3D devm_platform_ioremap_resource_byname(pdev, "slcr"); @@ -426,6 +428,20 @@ static int amd_mdb_add_pcie_port(struct amd_mdb_pcie *= pcie, =20 pp->ops =3D &amd_mdb_pcie_host_ops; =20 + /* Request the GPIO for PCIe reset signal and assert */ + reset_gpio =3D devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(reset_gpio)) + return dev_err_probe(dev, PTR_ERR(reset_gpio), + "Failed to request reset GPIO\n"); + + if (reset_gpio) { + mdelay(PCIE_T_PVPERL_MS); + + /* Deassert the reset signal */ + gpiod_set_value_cansleep(reset_gpio, 0); + mdelay(PCIE_T_RRS_READY_MS); + } + err =3D dw_pcie_host_init(pp); if (err) { dev_err(dev, "Failed to initialize host, err=3D%d\n", err); --=20 2.44.1