question about node creation /dev/mtd*

question about node creation /dev/mtd*

[vicky]

Hi,

I have enabled mtd in my config. When I boot from the updated kernel I 
find that /dev/mtdblock is not created?

How does the /dev/mtdblock get created? I didn't find this in the 
init/rcs script. I am under an impression that once the mtd is enabled 
in the linux
config file the creation of the corresponding node is taken care in some 
script.

I have a dummy nand driver written and placed in the mtd/nand location.

Please advice.

Vic

Re: question about node creation /dev/mtd*

[vicky]

[-- Attachment #1: Type: text/plain, Size: 725 bytes --]

vicky wrote:
> Hi,
>
> I have enabled mtd in my config. When I boot from the updated kernel I 
> find that /dev/mtdblock is not created?
>
> How does the /dev/mtdblock get created? I didn't find this in the 
> init/rcs script. I am under an impression that once the mtd is enabled 
> in the linux
> config file the creation of the corresponding node is taken care in 
> some script.
>
> I have a dummy nand driver written and placed in the mtd/nand location.
>
> Please advice.
>
> Vic
>
Adding to the email, I enabled the below options in my config file.

CONFIG_MTD=y
CONFIG_MTD_PARTITIONS=y
CONFIG_MTD_CHAR=y
CONFIG_MTD_BLKDEVS=y
CONFIG_MTD_BLOCK=y
CONFIG_MTD_NAND=y
CONFIG_MTD_NAND_VERIFY_WRITE=y
CONFIG_MTD_NAND_IDS=y



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begin:vcard
fn:vicky
n:;vicky
email;internet:vicky.irobot@gmail.com
version:2.1
end:vcard

Re: question about node creation /dev/mtd*

[Josh Boyer]

On Fri, 18 Jan 2008 17:42:39 +0530
vicky <vicky.irobot@gmail.com> wrote:

> Hi,
> 
> I have enabled mtd in my config. When I boot from the updated kernel I 
> find that /dev/mtdblock is not created?
> 
> How does the /dev/mtdblock get created? I didn't find this in the 
> init/rcs script. I am under an impression that once the mtd is enabled 
> in the linux
> config file the creation of the corresponding node is taken care in some 
> script.

You need to either have udev running, or create it manually yourself
with mknod (which can be done via a script you write). This is, of
course, assuming you have the mtdblock module loaded or compiled into
your kernel.

josh

Re: question about node creation /dev/mtd*

[Artem Bityutskiy]

On Fri, 2008-01-18 at 06:44 -0600, Josh Boyer wrote:
> On Fri, 18 Jan 2008 17:42:39 +0530
> vicky <vicky.irobot@gmail.com> wrote:
> 
> > Hi,
> > 
> > I have enabled mtd in my config. When I boot from the updated kernel I 
> > find that /dev/mtdblock is not created?
> > 
> > How does the /dev/mtdblock get created? I didn't find this in the 
> > init/rcs script. I am under an impression that once the mtd is enabled 
> > in the linux
> > config file the creation of the corresponding node is taken care in some 
> > script.
> 
> You need to either have udev running, or create it manually yourself
> with mknod (which can be done via a script you write). This is, of
> course, assuming you have the mtdblock module loaded or compiled into
> your kernel.

udev will not help because MTD is not Linux Device Model-enabled, so
only ancient manual device node creation method may be used. There is a
MAKEDEV script in mtd-utils.git which may help.

-- 
Best regards,
Artem Bityutskiy (Битюцкий Артём)

Re: question about node creation /dev/mtd*

[Josh Boyer]

On Fri, 18 Jan 2008 14:56:42 +0200
Artem Bityutskiy <dedekind@infradead.org> wrote:

> On Fri, 2008-01-18 at 06:44 -0600, Josh Boyer wrote:
> > On Fri, 18 Jan 2008 17:42:39 +0530
> > vicky <vicky.irobot@gmail.com> wrote:
> > 
> > > Hi,
> > > 
> > > I have enabled mtd in my config. When I boot from the updated kernel I 
> > > find that /dev/mtdblock is not created?
> > > 
> > > How does the /dev/mtdblock get created? I didn't find this in the 
> > > init/rcs script. I am under an impression that once the mtd is enabled 
> > > in the linux
> > > config file the creation of the corresponding node is taken care in some 
> > > script.
> > 
> > You need to either have udev running, or create it manually yourself
> > with mknod (which can be done via a script you write). This is, of
> > course, assuming you have the mtdblock module loaded or compiled into
> > your kernel.
> 
> udev will not help because MTD is not Linux Device Model-enabled, so
> only ancient manual device node creation method may be used. There is a
> MAKEDEV script in mtd-utils.git which may help.

MTD itself isn't, no.  But I thought mtdblock got some of the sysfs
stuff for free because it hooked into the generic block layer?

It's been a while, I could be mistaken.

josh