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kernel/linux-imx6_3.14.28/drivers/bus/omap-ocp2scp.c 2.23 KB
6b13f685e   김민수   BSP 최초 추가
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  /*
   * omap-ocp2scp.c - transform ocp interface protocol to scp protocol
   *
   * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * Author: Kishon Vijay Abraham I <kishon@ti.com>
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   */
  
  #include <linux/module.h>
  #include <linux/platform_device.h>
  #include <linux/err.h>
  #include <linux/pm_runtime.h>
  #include <linux/of.h>
  #include <linux/of_platform.h>
  
  static int ocp2scp_remove_devices(struct device *dev, void *c)
  {
  	struct platform_device *pdev = to_platform_device(dev);
  
  	platform_device_unregister(pdev);
  
  	return 0;
  }
  
  static int omap_ocp2scp_probe(struct platform_device *pdev)
  {
  	int ret;
  	struct device_node *np = pdev->dev.of_node;
  
  	if (np) {
  		ret = of_platform_populate(np, NULL, NULL, &pdev->dev);
  		if (ret) {
  			dev_err(&pdev->dev,
  			    "failed to add resources for ocp2scp child
  ");
  			goto err0;
  		}
  	}
  
  	pm_runtime_enable(&pdev->dev);
  
  	return 0;
  
  err0:
  	device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);
  
  	return ret;
  }
  
  static int omap_ocp2scp_remove(struct platform_device *pdev)
  {
  	pm_runtime_disable(&pdev->dev);
  	device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);
  
  	return 0;
  }
  
  #ifdef CONFIG_OF
  static const struct of_device_id omap_ocp2scp_id_table[] = {
  	{ .compatible = "ti,omap-ocp2scp" },
  	{}
  };
  MODULE_DEVICE_TABLE(of, omap_ocp2scp_id_table);
  #endif
  
  static struct platform_driver omap_ocp2scp_driver = {
  	.probe		= omap_ocp2scp_probe,
  	.remove		= omap_ocp2scp_remove,
  	.driver		= {
  		.name	= "omap-ocp2scp",
  		.owner	= THIS_MODULE,
  		.of_match_table = of_match_ptr(omap_ocp2scp_id_table),
  	},
  };
  
  module_platform_driver(omap_ocp2scp_driver);
  
  MODULE_ALIAS("platform: omap-ocp2scp");
  MODULE_AUTHOR("Texas Instruments Inc.");
  MODULE_DESCRIPTION("OMAP OCP2SCP driver");
  MODULE_LICENSE("GPL v2");