arch/mips/sni/eisa.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Virtual EISA root driver.
   4  * Acts as a placeholder if we don't have a proper EISA bridge.
   5  *
   6  * (C) 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
   7  * modified for SNI usage by Thomas Bogendoerfer
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/eisa.h>
  13 #include <linux/init.h>
  14
  15 /* The default EISA device parent (virtual root device).
  16  * Now use a platform device, since that's the obvious choice. */
  17
  18 static struct platform_device eisa_root_dev = {
  19         .name = "eisa",
  20         .id   = 0,
  21 };
  22
  23 static struct eisa_root_device eisa_bus_root = {
  24         .dev           = &eisa_root_dev.dev,
  25         .bus_base_addr = 0,
  26         .res           = &ioport_resource,
  27         .slots         = EISA_MAX_SLOTS,
  28         .dma_mask      = 0xffffffff,
  29         .force_probe   = 1,
  30 };
  31
  32 int __init sni_eisa_root_init(void)
  33 {
  34         int r;
  35
  36         r = platform_device_register(&eisa_root_dev);
  37         if (!r)
  38                 return r;
  39
  40         dev_set_drvdata(&eisa_root_dev.dev, &eisa_bus_root);
  41
  42         if (eisa_root_register(&eisa_bus_root)) {
  43                 /* A real bridge may have been registered before
  44                  * us. So quietly unregister. */
  45                 platform_device_unregister(&eisa_root_dev);
  46                 return -1;
  47         }
  48         return 0;
  49 }