[PATCH 2/3] mtd: maps: remove uclinux map driver

[Arnd Bergmann]

From: Arnd Bergmann <arnd at arndb.de>

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 4ba66a976072 ("arch: remove blackfin port") in 2018.

After commit 251f26c9e828 ("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 at arndb.de>
---
 drivers/mtd/maps/Kconfig   |   6 --
 drivers/mtd/maps/Makefile  |   1 -
 drivers/mtd/maps/uclinux.c | 118 -------------------------------------
 3 files changed, 125 deletions(-)
 delete mode 100644 drivers/mtd/maps/uclinux.c

diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index 784dba14e908..1e8f2b518ddd 100644
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -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
diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile
index 157f911f86d8..eff28fc0b60e 100644
--- a/drivers/mtd/maps/Makefile
+++ b/drivers/mtd/maps/Makefile
@@ -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
diff --git a/drivers/mtd/maps/uclinux.c b/drivers/mtd/maps/uclinux.c
deleted file mode 100644
index de4c46318abb..000000000000
--- a/drivers/mtd/maps/uclinux.c
+++ /dev/null
@@ -1,118 +0,0 @@
-/****************************************************************************/
-
-/*
- *	uclinux.c -- generic memory mapped MTD driver for uclinux
- *
- *	(C) Copyright 2002, Greg Ungerer (gerg at 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);
-
-/****************************************************************************/
-- 
2.39.5