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Mon, 2 Mar 2026 04:34:20 -0800 From: Akhil R To: Vinod Koul , Frank Li , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thierry Reding , "Jonathan Hunter" , Laxman Dewangan , Philipp Zabel , , , , CC: Akhil R Subject: [PATCH v2 2/9] dt-bindings: dma: nvidia,tegra186-gpc-dma: Make reset optional Date: Mon, 2 Mar 2026 18:02:32 +0530 Message-ID: <20260302123239.68441-3-akhilrajeev@nvidia.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20260302123239.68441-1-akhilrajeev@nvidia.com> References: <20260302123239.68441-1-akhilrajeev@nvidia.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF000252A0:EE_|SJ2PR12MB8944:EE_ X-MS-Office365-Filtering-Correlation-Id: 7549b414-0b5d-4b9a-0312-08de785811cf X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|82310400026|1800799024|36860700013|921020; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(376014)(7416014)(82310400026)(1800799024)(36860700013)(921020);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: gDi7r45Qiyuyu2nFwJp3WvjSxgMYvdXNoPboL3FoReKisGgLgHlu0eOnozoDL+tvB7tXUwDriTb+/kFsH+WJqUc9u3N445Awz48FgdZG7vP3O+6ny569V/4QF+jhwfva3wI4u1seqFEI0adxY9RDSeJD4ZlJURd7en/SVZMiUf6KoJ9Oa/Gy2BokYTtOwb2MwALhapJli1eQYyY81zu3Nz1lmuQN+haa3WpAjvHQVQU4A3TOem5DQkxxd08h+WMlJCTYbqTOdMlVthAmVEt4UX7JgeX+YoSmaLnKBOv4zdyyl19a5bQ1g3uT6k3JCGIamTfRXCWLyTkVIQpF3t/NlZvC25ZGM07cAxjuT+uneJMtSqSpWxnK3HvfaBIIvhWX2MD9jc8bLSSpIBBzqZZT0HczkMcfY5y8uYlKdxiFvjS1kHRbfGyEFGE//4LLobap X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Mar 2026 12:34:38.3058 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7549b414-0b5d-4b9a-0312-08de785811cf X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF000252A0.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB8944 In Tegra264, GPCDMA reset control is not exposed to Linux and is handled by the boot firmware. Although reset was not exposed in Tegra234 as well, the firmware supported a dummy reset which just returns success on reset without doing an actual reset. This is also not supported in Tegra264 BPMP. Therefore mark 'reset' and 'reset-names' properties as required only for devices prior to Tegra264. This also necessitates that the Tegra264 compatible to be standalone and cannot have the fallback compatible of Tegra186. Since there is no functional impact, we keep reset as required for Tegra234 to avoid breaking the ABI. Signed-off-by: Akhil R --- .../bindings/dma/nvidia,tegra186-gpc-dma.yaml | 22 ++++++++++++++----- 1 file changed, 16 insertions(+), 6 deletions(-) diff --git a/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml b/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml index 1e7b5ddd4658..34c9b41aecfc 100644 --- a/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml +++ b/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml @@ -16,16 +16,13 @@ maintainers: - Rajesh Gumasta - Akhil R -allOf: - - $ref: dma-controller.yaml# - properties: compatible: oneOf: + - const: nvidia,tegra264-gpcdma - const: nvidia,tegra186-gpcdma - items: - enum: - - nvidia,tegra264-gpcdma - nvidia,tegra234-gpcdma - nvidia,tegra194-gpcdma - const: nvidia,tegra186-gpcdma @@ -65,12 +62,25 @@ required: - compatible - reg - interrupts - - resets - - reset-names - "#dma-cells" - iommus - dma-channel-mask +allOf: + - $ref: dma-controller.yaml# + - if: + properties: + compatible: + contains: + enum: + - nvidia,tegra186-gpcdma + - nvidia,tegra194-gpcdma + - nvidia,tegra234-gpcdma + then: + required: + - resets + - reset-names + additionalProperties: false examples: -- 2.50.1