linux-imx

// SPDX-License-Identifier: GPL-2.0-only

/*

 * rbtx4939-flash (based on physmap.c)

 *

 * This is a simplified physmap driver with map_init callback function.

 *

 * Copyright (C) 2009 Atsushi Nemoto <anemo@mba.ocn.ne.jp>

 */

​

#include <linux/module.h>

#include <linux/types.h>

#include <linux/kernel.h>

#include <linux/slab.h>

#include <linux/device.h>

#include <linux/platform_device.h>

#include <linux/mtd/mtd.h>

#include <linux/mtd/map.h>

#include <linux/mtd/partitions.h>

#include <asm/txx9/rbtx4939.h>

​

struct rbtx4939_flash_info {

    struct mtd_info *mtd;

    struct map_info map;

};

​

static int rbtx4939_flash_remove(struct platform_device *dev)

{

    struct rbtx4939_flash_info *info;

​

    info = platform_get_drvdata(dev);

    if (!info)

        return 0;

​

    if (info->mtd) {

        mtd_device_unregister(info->mtd);

        map_destroy(info->mtd);

    }

    return 0;

}

​

static const char * const rom_probe_types[] = {

    "cfi_probe", "jedec_probe", NULL };

​

static int rbtx4939_flash_probe(struct platform_device *dev)

{

    struct rbtx4939_flash_data *pdata;

    struct rbtx4939_flash_info *info;

    struct resource *res;

    const char * const *probe_type;

    int err = 0;

    unsigned long size;

​

    pdata = dev_get_platdata(&dev->dev);

    if (!pdata)

        return -ENODEV;

​

    res = platform_get_resource(dev, IORESOURCE_MEM, 0);

    if (!res)

        return -ENODEV;

    info = devm_kzalloc(&dev->dev, sizeof(struct rbtx4939_flash_info),

                GFP_KERNEL);

    if (!info)

        return -ENOMEM;