Eric Lee / smarc-fsl-linux-kernel

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drivers/fpga/dfl-fme-region.c 2.06 KB
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bb61b9be3   Wu Hao   fpga: dfl: add fp... 
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  // SPDX-License-Identifier: GPL-2.0
  /*
   * FPGA Region Driver for FPGA Management Engine (FME)
   *
   * Copyright (C) 2017-2018 Intel Corporation, Inc.
   *
   * Authors:
   *   Wu Hao <hao.wu@intel.com>
   *   Joseph Grecco <joe.grecco@intel.com>
   *   Enno Luebbers <enno.luebbers@intel.com>
   *   Tim Whisonant <tim.whisonant@intel.com>
   *   Ananda Ravuri <ananda.ravuri@intel.com>
   *   Henry Mitchel <henry.mitchel@intel.com>
   */
  
  #include <linux/module.h>
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  #include <linux/fpga/fpga-mgr.h>
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  #include <linux/fpga/fpga-region.h>
  
  #include "dfl-fme-pr.h"
  
  static int fme_region_get_bridges(struct fpga_region *region)
  {
  	struct dfl_fme_region_pdata *pdata = region->priv;
  	struct device *dev = &pdata->br->dev;
  
  	return fpga_bridge_get_to_list(dev, region->info, &region->bridge_list);
  }
  
  static int fme_region_probe(struct platform_device *pdev)
  {
  	struct dfl_fme_region_pdata *pdata = dev_get_platdata(&pdev->dev);
  	struct device *dev = &pdev->dev;
  	struct fpga_region *region;
  	struct fpga_manager *mgr;
  	int ret;
  
  	mgr = fpga_mgr_get(&pdata->mgr->dev);
  	if (IS_ERR(mgr))
  		return -EPROBE_DEFER;
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  	region = devm_fpga_region_create(dev, mgr, fme_region_get_bridges);
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  	if (!region) {
  		ret = -ENOMEM;
  		goto eprobe_mgr_put;
  	}
  
  	region->priv = pdata;
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  	region->compat_id = mgr->compat_id;
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  	platform_set_drvdata(pdev, region);
  
  	ret = fpga_region_register(region);
  	if (ret)
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  		goto eprobe_mgr_put;
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  	dev_dbg(dev, "DFL FME FPGA Region probed
  ");
  
  	return 0;
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  eprobe_mgr_put:
  	fpga_mgr_put(mgr);
  	return ret;
  }
  
  static int fme_region_remove(struct platform_device *pdev)
  {
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  	struct fpga_region *region = platform_get_drvdata(pdev);
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  	struct fpga_manager *mgr = region->mgr;
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  	fpga_region_unregister(region);
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  	fpga_mgr_put(mgr);
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  	return 0;
  }
  
  static struct platform_driver fme_region_driver = {
  	.driver	= {
  		.name    = DFL_FPGA_FME_REGION,
  	},
  	.probe   = fme_region_probe,
  	.remove  = fme_region_remove,
  };
  
  module_platform_driver(fme_region_driver);
  
  MODULE_DESCRIPTION("FPGA Region for DFL FPGA Management Engine");
  MODULE_AUTHOR("Intel Corporation");
  MODULE_LICENSE("GPL v2");
  MODULE_ALIAS("platform:dfl-fme-region");