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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