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");