drivers/fsi/fsi-core.c

   1 /*
   2  * FSI core driver
   3  *
   4  * Copyright (C) IBM Corporation 2016
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <linux/device.h>
  17 #include <linux/fsi.h>
  18 #include <linux/module.h>
  19
  20 /* FSI core & Linux bus type definitions */
  21
  22 static int fsi_bus_match(struct device *dev, struct device_driver *drv)
  23 {
  24         struct fsi_device *fsi_dev = to_fsi_dev(dev);
  25         struct fsi_driver *fsi_drv = to_fsi_drv(drv);
  26         const struct fsi_device_id *id;
  27
  28         if (!fsi_drv->id_table)
  29                 return 0;
  30
  31         for (id = fsi_drv->id_table; id->engine_type; id++) {
  32                 if (id->engine_type != fsi_dev->engine_type)
  33                         continue;
  34                 if (id->version == FSI_VERSION_ANY ||
  35                                 id->version == fsi_dev->version)
  36                         return 1;
  37         }
  38
  39         return 0;
  40 }
  41
  42 struct bus_type fsi_bus_type = {
  43         .name           = "fsi",
  44         .match          = fsi_bus_match,
  45 };
  46 EXPORT_SYMBOL_GPL(fsi_bus_type);
  47
  48 static int fsi_init(void)
  49 {
  50         return bus_register(&fsi_bus_type);
  51 }
  52
  53 static void fsi_exit(void)
  54 {
  55         bus_unregister(&fsi_bus_type);
  56 }
  57
  58 module_init(fsi_init);
  59 module_exit(fsi_exit);