domenico/openwrt-18.06
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domenico
2025-06-24 15:51:28 +02:00
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target/linux/ar71xx/files/arch/mips/ath79/dev-m25p80.c Normal file
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/*
* Copyright (C) 2009-2012 Gabor Juhos <juhosg@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/spi/spi.h>
#include <linux/spi/flash.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/concat.h>
#include "dev-spi.h"
#include "dev-m25p80.h"
static struct spi_board_info ath79_spi_info[] = {
{
.bus_num = 0,
.chip_select = 0,
.max_speed_hz = 25000000,
.modalias = "m25p80",
},
{
.bus_num = 0,
.chip_select = 1,
.max_speed_hz = 25000000,
.modalias = "m25p80",
}
};
static struct ath79_spi_platform_data ath79_spi_data;
void __init ath79_register_m25p80(struct flash_platform_data *pdata)
{
ath79_spi_data.bus_num = 0;
ath79_spi_data.num_chipselect = 1;
ath79_spi_info[0].platform_data = pdata;
ath79_register_spi(&ath79_spi_data, ath79_spi_info, 1);
}
static struct flash_platform_data *multi_pdata;
static struct mtd_info *concat_devs[2] = { NULL, NULL };
static struct work_struct mtd_concat_work;
static void mtd_concat_add_work(struct work_struct *work)
{
struct mtd_info *mtd;
mtd = mtd_concat_create(concat_devs, ARRAY_SIZE(concat_devs), "flash");
mtd_device_register(mtd, multi_pdata->parts, multi_pdata->nr_parts);
}
static void mtd_concat_add(struct mtd_info *mtd)
{
static bool registered = false;
if (registered)
return;
if (!strcmp(mtd->name, "spi0.0"))
concat_devs[0] = mtd;
else if (!strcmp(mtd->name, "spi0.1"))
concat_devs[1] = mtd;
else
return;
if (!concat_devs[0] || !concat_devs[1])
return;
registered = true;
INIT_WORK(&mtd_concat_work, mtd_concat_add_work);
schedule_work(&mtd_concat_work);
}
static void mtd_concat_remove(struct mtd_info *mtd)
{
}
static void add_mtd_concat_notifier(void)
{
static struct mtd_notifier not = {
.add = mtd_concat_add,
.remove = mtd_concat_remove,
};
register_mtd_user(&not);
}
void __init ath79_register_m25p80_multi(struct flash_platform_data *pdata)
{
multi_pdata = pdata;
add_mtd_concat_notifier();
ath79_spi_data.bus_num = 0;
ath79_spi_data.num_chipselect = 2;
ath79_register_spi(&ath79_spi_data, ath79_spi_info, 2);
}