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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: v9kGM48VHWIlN7dMGZjBoLdgyQXmgKVkwSXHVHescIB1DqQa2LFK9SyMQ0SLcPkvlOWrdqM4xjZZRJVYwRUfdt7EoN4KSPmTSaXfaZzBvdtM4ewgmYKzoXQORnA0VM2PTtk+8Er6Zflv+EBze6dFR1eyYZ9cjLBW1p1Dkke2nnZ1X66VQ7hfc2Q001D6D1H2WS1s36/4h55zei3vUMvUCawImzdEqUDY3wdrIMZpJKcd3G2tsidZca2/HluNdjDVPksWUY1jUplIV+hneaqb6+lQNVjDljcQG9u2yGUzcF+uS1aG0pbkeZlSNECMMIARzYRB8Cpv+ANnB5yz50dt6QsjQ4Pf45SIjg7Sdzcm3j6NkFieUMqssn9MQ3iBBKsc+j3xpT7JhHS+HEDYlqYxfFkzpbZj6+44BIijrXR4kdP46UF7+HdE8Y7G4Sd4GSm4 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 May 2026 10:50:54.5107 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3c2b8730-3d57-43ad-c6d5-08deba4b7ed5 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: SJ5PEPF000001ED.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB6768 From: Jay Buddhabhatti Newer SoCs such as Versal Gen2 and Versal=E2=80=91Net expose a reset line for ZDMA. Older SoCs do not have this provision. Add an optional resets property to describe this reset. Signed-off-by: Jay Buddhabhatti Co-developed-by: Golla Nagendra Signed-off-by: Golla Nagendra --- .../devicetree/bindings/dma/xilinx/xlnx,zynqmp-dma-1.0.yaml | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dma-1= .0.yaml b/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dma-1.0.= yaml index 2da86037ad79..dff16763e11b 100644 --- a/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dma-1.0.yaml +++ b/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dma-1.0.yaml @@ -56,6 +56,9 @@ properties: iommus: maxItems: 1 =20 + resets: + maxItems: 1 + power-domains: maxItems: 1 =20 --=20 2.43.0 From nobody Mon Jun 8 23:57:32 2026 Received: from MW6PR02CU001.outbound.protection.outlook.com (mail-westus2azon11012029.outbound.protection.outlook.com [52.101.48.29]) (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 0EC8D371065; 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charset="utf-8" Versal Gen 2 and Versal Net SoCs expose a dedicated reset line per ZDMA channel, replacing the earlier approach where a single reset was shared across all channels. Add reset handling in the channel probe path using device_reset_optional() to trigger a reset pulse on the channel during initialization. Platforms without per-channel reset continue to work unaffected since device_reset_optional() returns 0 when no reset is specified. Signed-off-by: Golla Nagendra --- drivers/dma/xilinx/zynqmp_dma.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/dma/xilinx/zynqmp_dma.c b/drivers/dma/xilinx/zynqmp_dm= a.c index f6a812e49ddc..51c831760372 100644 --- a/drivers/dma/xilinx/zynqmp_dma.c +++ b/drivers/dma/xilinx/zynqmp_dma.c @@ -18,6 +18,7 @@ #include #include #include +#include =20 #include "../dmaengine.h" =20 @@ -916,6 +917,11 @@ static int zynqmp_dma_chan_probe(struct zynqmp_dma_dev= ice *zdev, if (IS_ERR(chan->regs)) return PTR_ERR(chan->regs); =20 + err =3D device_reset_optional(&pdev->dev); + if (err) + return dev_err_probe(&pdev->dev, err, + "failed to reset channel\n"); + chan->bus_width =3D ZYNQMP_DMA_BUS_WIDTH_64; chan->dst_burst_len =3D ZYNQMP_DMA_MAX_DST_BURST_LEN; chan->src_burst_len =3D ZYNQMP_DMA_MAX_SRC_BURST_LEN; --=20 2.43.0