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Signed-off-by: Nava kishore Manne Acked-by: Rob Herring --- Changes for v2: - None. include/dt-bindings/power/xlnx-zynqmp-power.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/dt-bindings/power/xlnx-zynqmp-power.h b/include/dt-bin= dings/power/xlnx-zynqmp-power.h index 0d9a412fd5e0..5f718759c38f 100644 --- a/include/dt-bindings/power/xlnx-zynqmp-power.h +++ b/include/dt-bindings/power/xlnx-zynqmp-power.h @@ -35,5 +35,6 @@ #define PD_CAN_1 48 #define PD_GPU 58 #define PD_PCIE 59 +#define PD_PL 69 =20 #endif --=20 2.25.1 From nobody Fri May 3 08:10:52 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A9D00C433F5 for ; Mon, 23 May 2022 13:46:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236648AbiEWNq2 (ORCPT ); Mon, 23 May 2022 09:46:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60726 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236513AbiEWNpu (ORCPT ); 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X-OriginatorOrg: xilinx.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 May 2022 13:45:44.4005 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b8a696ac-533b-47b4-3f80-08da3cc288eb X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c;Ip=[149.199.62.198];Helo=[xsj-pvapexch02.xlnx.xilinx.com] X-MS-Exchange-CrossTenant-AuthSource: SN1NAM02FT0033.eop-nam02.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO6PR02MB7508 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add fpga-region 'power-domains' property to allow to handle the FPGA/PL power domains. Signed-off-by: Nava kishore Manne Acked-by: Rob Herring --- Changes for v2: - Updated power-domains description. .../devicetree/bindings/fpga/fpga-region.txt | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/Documentation/devicetree/bindings/fpga/fpga-region.txt b/Docum= entation/devicetree/bindings/fpga/fpga-region.txt index 7d3515264838..f299c3749505 100644 --- a/Documentation/devicetree/bindings/fpga/fpga-region.txt +++ b/Documentation/devicetree/bindings/fpga/fpga-region.txt @@ -196,6 +196,20 @@ Optional properties: - config-complete-timeout-us : The maximum time in microseconds time for t= he FPGA to go to operating mode after the region has been programmed. - child nodes : devices in the FPGA after programming. +- power-domains : A phandle and power domain specifier pair to the power d= omain + which is responsible for turning on/off the power to the FPGA/PL region. +Example: + fpga_full: fpga-full { + compatible =3D "fpga-region"; + fpga-mgr =3D <&zynqmp_pcap>; + #address-cells =3D <2>; + #size-cells =3D <2>; + ranges; + power-domains =3D <&zynqmp_firmware PL_PD>; + }; + + The PL_PD power domain will be turned on before loading the bitstream +and turned off while removing/unloading the bitstream using overlays. =20 In the example below, when an overlay is applied targeting fpga-region0, fpga_mgr is used to program the FPGA. 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Mon, 23 May 2022 06:45:48 -0700 Envelope-to: git@xilinx.com, mdf@kernel.org, hao.wu@intel.com, yilun.xu@intel.com, trix@redhat.com, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, linux-fpga@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Received: from [10.140.6.60] (port=57798 helo=xhdnavam40.xilinx.com) by smtp.xilinx.com with esmtp (Exim 4.90) (envelope-from ) id 1nt8NX-000GwK-Kl; Mon, 23 May 2022 06:45:48 -0700 From: Nava kishore Manne To: , , , , , , , , , , , , Subject: [PATCH v2 3/3] fpga: region: Add runtime PM support Date: Mon, 23 May 2022 19:15:17 +0530 Message-ID: <20220523134517.4056873-4-nava.manne@xilinx.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220523134517.4056873-1-nava.manne@xilinx.com> References: <20220523134517.4056873-1-nava.manne@xilinx.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: e5547734-ee85-4cec-0f5e-08da3cc29011 X-MS-TrafficTypeDiagnostic: PH0PR02MB7750:EE_ X-Microsoft-Antispam-PRVS: X-Auto-Response-Suppress: DR, RN, NRN, OOF, AutoReply X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: xilinx.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 May 2022 13:45:56.3924 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e5547734-ee85-4cec-0f5e-08da3cc29011 X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c;Ip=[149.199.62.198];Helo=[xsj-pvapexch02.xlnx.xilinx.com] X-MS-Exchange-CrossTenant-AuthSource: SN1NAM02FT0026.eop-nam02.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR02MB7750 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add support to handle FPGA/PL power domain. With this patch, the PL power domain will be turned on before loading the bitstream into the targeted region and turned off while removing/unloading the bitstream from the targeted region using overlays. This can be achieved by adding the runtime PM support to the fpga regions. Signed-off-by: Nava kishore Manne --- Changes for v2: - Updated commit message. - Updated runtime PM handling logic to fix the PM ref count imbalance issues. drivers/fpga/of-fpga-region.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/fpga/of-fpga-region.c b/drivers/fpga/of-fpga-region.c index ae82532fc127..f14bb5916d97 100644 --- a/drivers/fpga/of-fpga-region.c +++ b/drivers/fpga/of-fpga-region.c @@ -15,6 +15,7 @@ #include #include #include +#include =20 static const struct of_device_id fpga_region_of_match[] =3D { { .compatible =3D "fpga-region", }, @@ -301,10 +302,17 @@ static int of_fpga_region_notify_pre_apply(struct fpg= a_region *region, return -EINVAL; } =20 + ret =3D pm_runtime_resume_and_get(dev->parent); + if (ret < 0) { + fpga_image_info_free(info); + return ret; + } + region->info =3D info; ret =3D fpga_region_program_fpga(region); if (ret) { /* error; reject overlay */ + pm_runtime_put_sync(dev->parent); fpga_image_info_free(info); region->info =3D NULL; } @@ -324,10 +332,13 @@ static int of_fpga_region_notify_pre_apply(struct fpg= a_region *region, static void of_fpga_region_notify_post_remove(struct fpga_region *region, struct of_overlay_notify_data *nd) { + struct device *dev =3D ®ion->dev; + fpga_bridges_disable(®ion->bridge_list); fpga_bridges_put(®ion->bridge_list); fpga_image_info_free(region->info); region->info =3D NULL; + pm_runtime_put_sync(dev->parent); } =20 /** @@ -411,6 +422,8 @@ static int of_fpga_region_probe(struct platform_device = *pdev) goto eprobe_mgr_put; } =20 + pm_runtime_enable(&pdev->dev); + of_platform_populate(np, fpga_region_of_match, NULL, ®ion->dev); platform_set_drvdata(pdev, region); =20 @@ -430,6 +443,7 @@ static int of_fpga_region_remove(struct platform_device= *pdev) =20 fpga_region_unregister(region); fpga_mgr_put(mgr); + pm_runtime_disable(region->dev.parent); =20 return 0; } --=20 2.25.1