drivers/usb/musb/musb_am335x.c

   1 #include <linux/init.h>
   2 #include <linux/platform_device.h>
   3 #include <linux/pm_runtime.h>
   4 #include <linux/module.h>
   5 #include <linux/of_platform.h>
   6
   7 static int am335x_child_probe(struct platform_device *pdev)
   8 {
   9         int ret;
  10
  11         pm_runtime_enable(&pdev->dev);
  12
  13         ret = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
  14         if (ret)
  15                 goto err;
  16
  17         return 0;
  18 err:
  19         pm_runtime_disable(&pdev->dev);
  20         return ret;
  21 }
  22
  23 static int of_remove_populated_child(struct device *dev, void *d)
  24 {
  25         struct platform_device *pdev = to_platform_device(dev);
  26
  27         of_device_unregister(pdev);
  28         return 0;
  29 }
  30
  31 static int am335x_child_remove(struct platform_device *pdev)
  32 {
  33         device_for_each_child(&pdev->dev, NULL, of_remove_populated_child);
  34         pm_runtime_disable(&pdev->dev);
  35         return 0;
  36 }
  37
  38 static const struct of_device_id am335x_child_of_match[] = {
  39         { .compatible = "ti,am33xx-usb" },
  40         {  },
  41 };
  42 MODULE_DEVICE_TABLE(of, am335x_child_of_match);
  43
  44 static struct platform_driver am335x_child_driver = {
  45         .probe          = am335x_child_probe,
  46         .remove         = am335x_child_remove,
  47         .driver         = {
  48                 .name   = "am335x-usb-childs",
  49                 .of_match_table = of_match_ptr(am335x_child_of_match),
  50         },
  51 };
  52
  53 module_platform_driver(am335x_child_driver);
  54 MODULE_DESCRIPTION("AM33xx child devices");
  55 MODULE_LICENSE("GPL v2");