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Linux/drivers/bus/omap-ocp2scp.c

  1 /*
  2  * omap-ocp2scp.c - transform ocp interface protocol to scp protocol
  3  *
  4  * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
  5  * This program is free software; you can redistribute it and/or modify
  6  * it under the terms of the GNU General Public License as published by
  7  * the Free Software Foundation; either version 2 of the License, or
  8  * (at your option) any later version.
  9  *
 10  * Author: Kishon Vijay Abraham I <kishon@ti.com>
 11  *
 12  * This program is distributed in the hope that it will be useful,
 13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 15  * GNU General Public License for more details.
 16  *
 17  */
 18 
 19 #include <linux/module.h>
 20 #include <linux/platform_device.h>
 21 #include <linux/err.h>
 22 #include <linux/pm_runtime.h>
 23 #include <linux/of.h>
 24 #include <linux/of_platform.h>
 25 
 26 static int ocp2scp_remove_devices(struct device *dev, void *c)
 27 {
 28         struct platform_device *pdev = to_platform_device(dev);
 29 
 30         platform_device_unregister(pdev);
 31 
 32         return 0;
 33 }
 34 
 35 static int omap_ocp2scp_probe(struct platform_device *pdev)
 36 {
 37         int ret;
 38         struct device_node *np = pdev->dev.of_node;
 39 
 40         if (np) {
 41                 ret = of_platform_populate(np, NULL, NULL, &pdev->dev);
 42                 if (ret) {
 43                         dev_err(&pdev->dev,
 44                             "failed to add resources for ocp2scp child\n");
 45                         goto err0;
 46                 }
 47         }
 48 
 49         pm_runtime_enable(&pdev->dev);
 50 
 51         return 0;
 52 
 53 err0:
 54         device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);
 55 
 56         return ret;
 57 }
 58 
 59 static int omap_ocp2scp_remove(struct platform_device *pdev)
 60 {
 61         pm_runtime_disable(&pdev->dev);
 62         device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);
 63 
 64         return 0;
 65 }
 66 
 67 #ifdef CONFIG_OF
 68 static const struct of_device_id omap_ocp2scp_id_table[] = {
 69         { .compatible = "ti,omap-ocp2scp" },
 70         {}
 71 };
 72 MODULE_DEVICE_TABLE(of, omap_ocp2scp_id_table);
 73 #endif
 74 
 75 static struct platform_driver omap_ocp2scp_driver = {
 76         .probe          = omap_ocp2scp_probe,
 77         .remove         = omap_ocp2scp_remove,
 78         .driver         = {
 79                 .name   = "omap-ocp2scp",
 80                 .owner  = THIS_MODULE,
 81                 .of_match_table = of_match_ptr(omap_ocp2scp_id_table),
 82         },
 83 };
 84 
 85 module_platform_driver(omap_ocp2scp_driver);
 86 
 87 MODULE_ALIAS("platform: omap-ocp2scp");
 88 MODULE_AUTHOR("Texas Instruments Inc.");
 89 MODULE_DESCRIPTION("OMAP OCP2SCP driver");
 90 MODULE_LICENSE("GPL v2");
 91 

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