drivers/usb/musb/musb_am335x.c

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