1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2005 Samsung Electronics
4 * Kyungmin Park <kyungmin.park@samsung.com>
7 * This is a device driver for the OneNAND flash for generic boards.
10 #include <linux/module.h>
11 #include <linux/slab.h>
12 #include <linux/platform_device.h>
13 #include <linux/mtd/mtd.h>
14 #include <linux/mtd/onenand.h>
15 #include <linux/mtd/partitions.h>
19 * Note: Driver name and platform data format have been updated!
21 * This version of the driver is named "onenand-flash" and takes struct
22 * onenand_platform_data as platform data. The old ARM-specific version
23 * with the name "onenand" used to take struct flash_platform_data.
25 #define DRIVER_NAME "onenand-flash"
29 struct onenand_chip onenand;
32 static int generic_onenand_probe(struct platform_device *pdev)
34 struct onenand_info *info;
35 struct onenand_platform_data *pdata = dev_get_platdata(&pdev->dev);
36 struct resource *res = pdev->resource;
37 unsigned long size = resource_size(res);
40 info = kzalloc(sizeof(struct onenand_info), GFP_KERNEL);
44 if (!request_mem_region(res->start, size, dev_name(&pdev->dev))) {
49 info->onenand.base = ioremap(res->start, size);
50 if (!info->onenand.base) {
52 goto out_release_mem_region;
55 info->onenand.mmcontrol = pdata ? pdata->mmcontrol : NULL;
57 err = platform_get_irq(pdev, 0);
61 info->onenand.irq = err;
63 info->mtd.dev.parent = &pdev->dev;
64 info->mtd.priv = &info->onenand;
66 if (onenand_scan(&info->mtd, 1)) {
71 err = mtd_device_register(&info->mtd, pdata ? pdata->parts : NULL,
72 pdata ? pdata->nr_parts : 0);
74 platform_set_drvdata(pdev, info);
79 iounmap(info->onenand.base);
80 out_release_mem_region:
81 release_mem_region(res->start, size);
88 static int generic_onenand_remove(struct platform_device *pdev)
90 struct onenand_info *info = platform_get_drvdata(pdev);
91 struct resource *res = pdev->resource;
92 unsigned long size = resource_size(res);
95 onenand_release(&info->mtd);
96 release_mem_region(res->start, size);
97 iounmap(info->onenand.base);
104 static struct platform_driver generic_onenand_driver = {
108 .probe = generic_onenand_probe,
109 .remove = generic_onenand_remove,
112 module_platform_driver(generic_onenand_driver);
114 MODULE_LICENSE("GPL");
115 MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
116 MODULE_DESCRIPTION("Glue layer for OneNAND flash on generic boards");
117 MODULE_ALIAS("platform:" DRIVER_NAME);