// SPDX-License-Identifier: GPL-2.0-only
/*
 * Virtual EISA root driver.
 * Acts as a placeholder if we don't have a proper EISA bridge.
 *
 * (C) 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
 * modified for SNI usage by Thomas Bogendoerfer
 */

#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/eisa.h>
#include <linux/init.h>

/* The default EISA device parent (virtual root device).
 * Now use a platform device, since that's the obvious choice. */

static struct platform_device eisa_root_dev = {
        .name = "eisa",
        .id   = 0,
};

static struct eisa_root_device eisa_bus_root = {
        .dev           = &eisa_root_dev.dev,
        .bus_base_addr = 0,
        .res           = &ioport_resource,
        .slots         = EISA_MAX_SLOTS,
        .dma_mask      = 0xffffffff,
        .force_probe   = 1,
};

int __init sni_eisa_root_init(void)
{
        int r;

        r = platform_device_register(&eisa_root_dev);
        if (!r)
                return r;

        dev_set_drvdata(&eisa_root_dev.dev, &eisa_bus_root);

        if (eisa_root_register(&eisa_bus_root)) {
                /* A real bridge may have been registered before
                 * us. So quietly unregister. */
                platform_device_unregister(&eisa_root_dev);
                return -1;
        }
        return 0;
}