Re: [PATCH v5 01/11] dt-bindings: arm: fsl: add imx-se-fw binding doc

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Thu, Aug 24, 2023 at 08:45:41PM +0200, Krzysztof Kozlowski wrote:
> On 23/08/2023 14:43, Rob Herring wrote:
> >> +                                                          |
> >> +  +------------------------------------------------------ |
> >> +                     |             |           |          |
> >> +  userspace     /dev/ele_muXch0    |           |          |
> >> +                           /dev/ele_muXch1     |          |
> >> +                                         /dev/ele_muXchY  |
> >> +                                                          |
> >> +
> >> +  When a user sends a command to the firmware, it registers its device_ctx
> >> +  as waiter of a response from firmware.
> >> +
> >> +  A user can be registered as receiver of command from the ELE.
> >> +  Create char devices in /dev as channels of the form /dev/ele_muXchY with X
> >> +  the id of the driver and Y for each users. It allows to send and receive
> >> +  messages to the NXP EdgeLock Enclave IP firmware on NXP SoC, where current
> >> +  possible value, i.e., supported SoC(s) are imx8ulp, imx93.
> > 
> > Looks like a bunch of Linux details which don't belong in the binding.
> > 
> > Why do you need your own custom interface to userspace? No one else has 
> > a similar feature in their platforms? Something like virtio or rpmsg 
> > doesn't work?
> 
> +Cc Greg,
> 
> I doubt they care. This is some stub-driver to pass messages from
> user-space to the firmware. The interface is undocumented, without
> examples and no user-space user.

Great, no user?  Let's delete the code then :)

thanks,

greg k-h