| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * Copyright (c) 2015, Christoph Hellwig. |
| 4 | * Copyright (c) 2015, Intel Corporation. |
| 5 | */ |
| 6 | #include <linux/platform_device.h> |
| 7 | #include <linux/init.h> |
| 8 | #include <linux/ioport.h> |
| 9 | |
| 10 | static int found(struct resource *res, void *data) |
| 11 | { |
| 12 | return 1; |
| 13 | } |
| 14 | |
| 15 | static __init int register_e820_pmem(void) |
| 16 | { |
| 17 | struct platform_device *pdev; |
| 18 | int rc; |
| 19 | |
| 20 | rc = walk_iomem_res_desc(IORES_DESC_PERSISTENT_MEMORY_LEGACY, |
| 21 | IORESOURCE_MEM, 0, -1, NULL, found); |
| 22 | if (rc <= 0) |
| 23 | return 0; |
| 24 | |
| 25 | /* |
| 26 | * See drivers/nvdimm/e820.c for the implementation, this is |
| 27 | * simply here to trigger the module to load on demand. |
| 28 | */ |
| 29 | pdev = platform_device_alloc("e820_pmem", -1); |
| 30 | return platform_device_add(pdev); |
| 31 | } |
| 32 | device_initcall(register_e820_pmem); |