how to get mtd_info in kernel space?

how to get mtd_info in kernel space?

[Xiaogeng (Shawn) Jin]

Hi,

get_mtd_device() is used to get an MTD device with a specific minor 
number. I have several MTD devices enabled and how can I get their minor 
numbers which can be used to invoke get_mtd_device()? What function call?

Thanks.

- Shawn.

Re: how to get mtd_info in kernel space?

[David Woodhouse]

xjin@redswitch.com said:
>  get_mtd_device() is used to get an MTD device with a specific minor
> number. I have several MTD devices enabled and how can I get their
> minor  numbers which can be used to invoke get_mtd_device()? What
> function call? 

At the moment you can't. You have to get each one from 0 to MAX_MTD_DEVICES 
and check whether it's the one you want. We could perhaps implement a 
get_mtd_device_byname() since JFFS2 wants that too now.

What do you want it for?

--
dwmw2

Re: how to get mtd_info in kernel space?

[David Woodhouse]

Er, note also that if you've got a special device which contains only 
something odd like MAC address for a built-in network card, you don't have 
to register it with the core MTD code; you can make it available only to 
your network card driver via some private mechanism if you want.

--
dwmw2

Re: how to get mtd_info in kernel space?

[Xiaogeng (Shawn) Jin]

Thanks for the answer. My proposed device will contain basically some 
configuration data. But they are not as simple as MAC address. The size 
will grow dynamically.

I want such a flexible function to get minor number because our 
partitions may be changed later thus those numbers cannot be fixed. 
Anyway, since now the only way is to use the fix minor number, I'm OK 
with current mechanism. ;)

- Shawn.