On 08/09/17 11:57, Sebastian Huber wrote:

On 08/09/17 11:28, Yannick SARTHOU wrote:

*What I want to achieve :* I want to create a new driver that allows the user to open a device "/dev/mram" and use ioctl calls to allow the user to control these registers in a safe way.

You don't have to use a device driver for this. You need a device driver only if you want to be portable to systems with a user/kernel space separation or avoid link time dependencies. You can define a simple API with normal functions for your MRAM device.


For device drivers on SPARC you can use the classic device drivers, a driver manager device driver or an IMFS generic node. I would use an IMFS generic node, see IMFS_make_generic_node() with comments in imfs.h.

--
Sebastian Huber, embedded brains GmbH

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