From: regigao <regigao@sinamail.com>
To: <linux-mtd@lists.infradead.org>
Subject: /dev/mtdblock0 : No such device
Date: Mon, 18 Mar 2002 09:18:12 +0800 [thread overview]
Message-ID: <20020318011812.26887.qmail@sinamail.com> (raw)
Hi
I have a board with two Intel Flash E28F640.
The Flash mapping address starts from 0xff000000 to 0xffffffff
Each Flash is 8 MB , so the total size is 16 MB
I use kernel 2.4.18 , and enable the MTD options with
CONFIG_MTD
CONFIG_MTD_CHAR
CONFIG_MTD_BLOCK
CONFIG_MTD_CFI
CONFIG_MTD_CFI_GEOMETRY
CONFIG_MTD_CFI_B1
CONFIG_MTD_CFI_I2
CONFIG_MTD_CFI_INTELEXT
CONFIG_MTD_PHYSMAP
CONFIG_MTD_PHYSMAP_START ( 0xff000000 )
CONFIG_MTD_PHYSMAP_LEN ( 0x01000000 )
CONFIG_MTD_PHYSMAP_BUSWIDTH ( 1 )
I also enable the JFFS option in File systems
When I boot the kernel , I can see the detection message
physmap flash device: 1000000 at ff000000
Physically mapped flash: Found 1 x16 devices at 0x800000 in 8-bit mode
mtd: Giving out device 0 to Physically mapped flash
I cat /proc/mtd and it shows the MTD device
# cat /proc/mtd
dev: size erasesize name
mtd0: 01000000 00020000 "Physically mapped flash"
Now I use mkfs.jffs to build a jffs image(img_file) and cp it to /dev/mtd0
# cp img_file /dev/mtd0
But whenever I try to mount /dev/mtdblock0 , it shows No such device
# mount -t jffs /dev/mtdblock0 tmp
mount: Mounting /dev/mtdblock0 on /tmp/tmp failed: No such device
I am sure that I have the device file ( mtdblock0 ) in the /dev/
# ls -la /dev/mtdblock0
brw-r--r-- 1 root root 31, 0 Dec 11 2001 /dev/mtdblock0
Does anyone have any suggestions about what I might be getting wrong ?
thanks !
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reply other threads:[~2002-03-18 1:19 UTC|newest]
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