Accessing an MTD device from kernel space
tglx at linutronix.de
Wed May 26 17:26:29 EDT 2004
On Wednesday 26 May 2004 23:21, Eisenhut, Daniel (MED) wrote:
> To list,
> I've successfully setup MTD devices for our NOR flash chips and
> everything is working great from userspace. But I have a need to access
> the NOR flash from within kernelspace, such as in a /proc entry.
> What is the best way to access the flash from within the kernel? The
> only way I've be able to so far is to just dereference a pointer
> pointing to the flash address. But this creates two issues (that I know
> 1. A race condition between my proc entry that reads the flash and
> another process using the MTD device.
> 2. The MTD device does not always leave the flash chip in read mode.
> Is there anything setup in the current MTD code to allow access from
> within the kernel?
Just use the mtd API which is used from fs drivers and anything else which
accessed the mtd devices from kernel space
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