mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-27 01:30:55 +07:00
1ff184225b
Since 43cc71eed1, the platform modalias is
prefixed with "platform:". Add MODULE_ALIAS() to the hotpluggable MTD NAND
platform drivers, to re-enable auto loading.
NOTE: at91_nand for some reason disallows modular builds. I'm assuming that's
just an oversight that will be fixed.
[dbrownell@users.sourceforge.net: minor fix]
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
173 lines
3.6 KiB
C
173 lines
3.6 KiB
C
/*
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* drivers/mtd/nand/orion_nand.c
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*
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* NAND support for Marvell Orion SoC platforms
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*
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* Tzachi Perelstein <tzachi@marvell.com>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/nand.h>
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#include <linux/mtd/partitions.h>
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#include <asm/io.h>
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#include <asm/sizes.h>
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#include <asm/arch/hardware.h>
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#include <asm/plat-orion/orion_nand.h>
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#ifdef CONFIG_MTD_CMDLINE_PARTS
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static const char *part_probes[] = { "cmdlinepart", NULL };
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#endif
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static void orion_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
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{
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struct nand_chip *nc = mtd->priv;
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struct orion_nand_data *board = nc->priv;
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u32 offs;
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if (cmd == NAND_CMD_NONE)
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return;
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if (ctrl & NAND_CLE)
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offs = (1 << board->cle);
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else if (ctrl & NAND_ALE)
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offs = (1 << board->ale);
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else
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return;
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if (nc->options & NAND_BUSWIDTH_16)
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offs <<= 1;
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writeb(cmd, nc->IO_ADDR_W + offs);
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}
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static int __init orion_nand_probe(struct platform_device *pdev)
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{
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struct mtd_info *mtd;
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struct nand_chip *nc;
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struct orion_nand_data *board;
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void __iomem *io_base;
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int ret = 0;
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#ifdef CONFIG_MTD_PARTITIONS
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struct mtd_partition *partitions = NULL;
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int num_part = 0;
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#endif
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nc = kzalloc(sizeof(struct nand_chip) + sizeof(struct mtd_info), GFP_KERNEL);
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if (!nc) {
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printk(KERN_ERR "orion_nand: failed to allocate device structure.\n");
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ret = -ENOMEM;
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goto no_res;
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}
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mtd = (struct mtd_info *)(nc + 1);
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io_base = ioremap(pdev->resource[0].start,
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pdev->resource[0].end - pdev->resource[0].start + 1);
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if (!io_base) {
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printk(KERN_ERR "orion_nand: ioremap failed\n");
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ret = -EIO;
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goto no_res;
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}
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board = pdev->dev.platform_data;
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mtd->priv = nc;
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mtd->owner = THIS_MODULE;
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nc->priv = board;
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nc->IO_ADDR_R = nc->IO_ADDR_W = io_base;
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nc->cmd_ctrl = orion_nand_cmd_ctrl;
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nc->ecc.mode = NAND_ECC_SOFT;
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if (board->width == 16)
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nc->options |= NAND_BUSWIDTH_16;
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platform_set_drvdata(pdev, mtd);
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if (nand_scan(mtd, 1)) {
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ret = -ENXIO;
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goto no_dev;
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}
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#ifdef CONFIG_MTD_PARTITIONS
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#ifdef CONFIG_MTD_CMDLINE_PARTS
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mtd->name = "orion_nand";
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num_part = parse_mtd_partitions(mtd, part_probes, &partitions, 0);
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#endif
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/* If cmdline partitions have been passed, let them be used */
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if (num_part <= 0) {
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num_part = board->nr_parts;
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partitions = board->parts;
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}
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if (partitions && num_part > 0)
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ret = add_mtd_partitions(mtd, partitions, num_part);
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else
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ret = add_mtd_device(mtd);
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#else
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ret = add_mtd_device(mtd);
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#endif
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if (ret) {
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nand_release(mtd);
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goto no_dev;
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}
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return 0;
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no_dev:
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platform_set_drvdata(pdev, NULL);
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iounmap(io_base);
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no_res:
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kfree(nc);
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return ret;
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}
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static int __devexit orion_nand_remove(struct platform_device *pdev)
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{
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struct mtd_info *mtd = platform_get_drvdata(pdev);
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struct nand_chip *nc = mtd->priv;
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nand_release(mtd);
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iounmap(nc->IO_ADDR_W);
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kfree(nc);
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return 0;
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}
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static struct platform_driver orion_nand_driver = {
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.probe = orion_nand_probe,
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.remove = orion_nand_remove,
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.driver = {
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.name = "orion_nand",
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.owner = THIS_MODULE,
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},
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};
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static int __init orion_nand_init(void)
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{
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return platform_driver_register(&orion_nand_driver);
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}
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static void __exit orion_nand_exit(void)
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{
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platform_driver_unregister(&orion_nand_driver);
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}
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module_init(orion_nand_init);
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module_exit(orion_nand_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Tzachi Perelstein");
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MODULE_DESCRIPTION("NAND glue for Orion platforms");
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MODULE_ALIAS("platform:orion_nand");
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