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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 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; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:149.199.62.198; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 static const struct of_device_id fpga_region_of_match[] = { { .compatible = "fpga-region", }, @@ -301,10 +302,17 @@ static int of_fpga_region_notify_pre_apply(struct fpga_region *region, return -EINVAL; } + ret = pm_runtime_resume_and_get(dev->parent); + if (ret < 0) { + fpga_image_info_free(info); + return ret; + } + region->info = info; ret = fpga_region_program_fpga(region); if (ret) { /* error; reject overlay */ + pm_runtime_put_sync(dev->parent); fpga_image_info_free(info); region->info = NULL; } @@ -324,10 +332,13 @@ static int of_fpga_region_notify_pre_apply(struct fpga_region *region, static void of_fpga_region_notify_post_remove(struct fpga_region *region, struct of_overlay_notify_data *nd) { + struct device *dev = ®ion->dev; + fpga_bridges_disable(®ion->bridge_list); fpga_bridges_put(®ion->bridge_list); fpga_image_info_free(region->info); region->info = NULL; + pm_runtime_put_sync(dev->parent); } /** @@ -411,6 +422,8 @@ static int of_fpga_region_probe(struct platform_device *pdev) goto eprobe_mgr_put; } + pm_runtime_enable(&pdev->dev); + of_platform_populate(np, fpga_region_of_match, NULL, ®ion->dev); platform_set_drvdata(pdev, region); @@ -430,6 +443,7 @@ static int of_fpga_region_remove(struct platform_device *pdev) fpga_region_unregister(region); fpga_mgr_put(mgr); + pm_runtime_disable(region->dev.parent); return 0; } -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel