Linux Kernel设备驱动模型之平台设备初始化

static const struct dev_pm_ops platform_dev_pm_ops = {  .runtime_suspend = pm_generic_runtime_suspend,  .runtime_resume = pm_generic_runtime_resume,  USE_PLATFORM_PM_SLEEP_OPS };

struct bus_type platform_bus_type = {  .name  = "platform",  .dev_groups = platform_dev_groups,  .match  = platform_match,  .uevent  = platform_uevent,  .pm  = &platform_dev_pm_ops, }; EXPORT_SYMBOL_GPL(platform_bus_type);

int __init platform_bus_init(void) {  int error;

 early_platform_cleanup();

 error = device_register(&platform_bus);  if (error)   return error;  error =  bus_register(&platform_bus_type);  if (error)   device_unregister(&platform_bus);  of_platform_register_reconfig_notifier();  return error; }