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mtd: maps: remove uclinux map driver

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Rather than using platform data or DT properties, the configuration
for this mtd map driver used to be passed through the global
uclinux_ram_map structure, but the last instance was removed in
commit 4ba66a9760 ("arch: remove blackfin port") in 2018.

After commit 251f26c9e8 ("mtd: maps: Make uclinux_ram_map static"),
it became impossible to configure it at all, even with out-of-tree
platform code.

Clearly nobody is using it, so remove it.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
This commit is contained in:
Arnd Bergmann
2026-05-26 12:32:05 +02:00
committed by Miquel Raynal
parent 6dcd852e9b
commit c584b8a7ad
3 changed files with 0 additions and 125 deletions
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6
drivers/mtd/maps/Kconfig
View File

@@ -284,12 +284,6 @@ config MTD_PCMCIA_ANONYMOUS
If unsure, say N.
config MTD_UCLINUX
bool "Generic uClinux RAM/ROM filesystem support"
depends on (MTD_RAM=y || MTD_ROM=y) && (!MMU || COLDFIRE)
help
Map driver to support image based filesystems for uClinux.
config MTD_PLATRAM
tristate "Map driver for platform device RAM (mtd-ram)"
select MTD_RAM

1
drivers/mtd/maps/Makefile
View File

@@ -31,7 +31,6 @@ obj-$(CONFIG_MTD_SCx200_DOCFLASH)+= scx200_docflash.o
obj-$(CONFIG_MTD_SOLUTIONENGINE)+= solutionengine.o
obj-$(CONFIG_MTD_PCI) += pci.o
obj-$(CONFIG_MTD_IMPA7) += impa7.o
obj-$(CONFIG_MTD_UCLINUX) += uclinux.o
obj-$(CONFIG_MTD_SCB2_FLASH) += scb2_flash.o
obj-$(CONFIG_MTD_PLATRAM) += plat-ram.o
obj-$(CONFIG_MTD_VMU) += vmu-flash.o

118
drivers/mtd/maps/uclinux.c
View File

@@ -1,118 +0,0 @@
/****************************************************************************/
/*
* uclinux.c -- generic memory mapped MTD driver for uclinux
*
* (C) Copyright 2002, Greg Ungerer (gerg@snapgear.com)
*
* License: GPL
*/
/****************************************************************************/
#include <linux/moduleparam.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/major.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <asm/io.h>
#include <asm/sections.h>
/****************************************************************************/
#ifdef CONFIG_MTD_ROM
#define MAP_NAME "rom"
#else
#define MAP_NAME "ram"
#endif
static struct map_info uclinux_ram_map = {
.name = MAP_NAME,
.size = 0,
};
static unsigned long physaddr = -1;
module_param(physaddr, ulong, S_IRUGO);
static struct mtd_info *uclinux_ram_mtdinfo;
/****************************************************************************/
static const struct mtd_partition uclinux_romfs[] = {
{ .name = "ROMfs" }
};
#define NUM_PARTITIONS ARRAY_SIZE(uclinux_romfs)
/****************************************************************************/
static int uclinux_point(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, void **virt, resource_size_t *phys)
{
struct map_info *map = mtd->priv;
*virt = map->virt + from;
if (phys)
*phys = map->phys + from;
*retlen = len;
return(0);
}
/****************************************************************************/
static int __init uclinux_mtd_init(void)
{
struct mtd_info *mtd;
struct map_info *mapp;
mapp = &uclinux_ram_map;
if (physaddr == -1)
mapp->phys = (resource_size_t)__bss_stop;
else
mapp->phys = physaddr;
if (!mapp->size)
mapp->size = PAGE_ALIGN(ntohl(*((unsigned long *)(mapp->phys + 8))));
mapp->bankwidth = 4;
printk("uclinux[mtd]: probe address=0x%x size=0x%x\n",
(int) mapp->phys, (int) mapp->size);
/*
* The filesystem is guaranteed to be in direct mapped memory. It is
* directly following the kernels own bss region. Following the same
* mechanism used by architectures setting up traditional initrds we
* use phys_to_virt to get the virtual address of its start.
*/
mapp->virt = phys_to_virt(mapp->phys);
if (mapp->virt == 0) {
printk("uclinux[mtd]: no virtual mapping?\n");
return(-EIO);
}
simple_map_init(mapp);
mtd = do_map_probe("map_" MAP_NAME, mapp);
if (!mtd) {
printk("uclinux[mtd]: failed to find a mapping?\n");
return(-ENXIO);
}
mtd->owner = THIS_MODULE;
mtd->_point = uclinux_point;
mtd->priv = mapp;
uclinux_ram_mtdinfo = mtd;
mtd_device_register(mtd, uclinux_romfs, NUM_PARTITIONS);
return(0);
}
device_initcall(uclinux_mtd_init);
/****************************************************************************/