// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2015, Christoph Hellwig.
 * Copyright (c) 2015, Intel Corporation.
 */
#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/ioport.h>

static int found(struct resource *res, void *data)
{
        return 1;
}

static __init int register_e820_pmem(void)
{
        struct platform_device *pdev;
        int rc;

        rc = walk_iomem_res_desc(IORES_DESC_PERSISTENT_MEMORY_LEGACY,
                                 IORESOURCE_MEM, 0, -1, NULL, found);
        if (rc <= 0)
                return 0;

        /*
         * See drivers/nvdimm/e820.c for the implementation, this is
         * simply here to trigger the module to load on demand.
         */
        pdev = platform_device_alloc("e820_pmem", -1);

        rc = platform_device_add(pdev);
        if (rc)
                platform_device_put(pdev);

        return rc;
}
device_initcall(register_e820_pmem);