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 18static struct platform_device eisa_root_dev = { 19 .name = "eisa", 20 .id = 0, 21}; 22 23static 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 32int __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} 50