[PATCH] ARM: expose PB1176 ROM in debugfs

[Linus Walleij]

Ping on this David, you have an opinion? debugfs ROM or
MTD ROM mapping?

Yours,
Linus Walleij

2010/7/18 Linus Walleij <linus.ml.walleij at gmail.com>:
> 2010/7/18 Russell King - ARM Linux <linux at arm.linux.org.uk>:
>
>> On Wed, Jul 07, 2010 at 02:05:39PM +0200, Linus Walleij wrote:
>>> This exposes the PB1176 ROM as a simple 16KiB file in debugfs so
>>> that it can be copied out and disassembled with some
>>> objcopy+objdump massage for example. I used this to find out how
>>> the ROM handled the CharLCD.
>>
>> Would it be better to expose this through a mtd ROM mapping (map_rom) ?
>
> This is more convenient I think.
>
> I don't know the actual purpose of MTD ROM mappings, so
> paging David on this.
>
> It has the small upside of only getting compiled in if you select
> CONFIG_DEBUG_FS, and getting a distinct name in debugfs
> rather than /dev/mtdN.
>
> Also I can now cp /debugfs/pb1176-ROM foo.bin
> Is this possible with mtdblocks or do you have to dd if=... ?
>
> Yours,
> Linus Walleij
>