RE: i3c application

Ryan Chen
2019-02-04T07:08:29Z

Hello Boris,
> >+Vitor who started a discussion around i3c-tools and the associate
> > kernel <-> userspace interface.
>
> Does there have open source repo in internet?

>AFAICT there's nothing implemented yet, we just started discussing it.

>
>
> > Hi all,
> > I just work with I3C, does there have any application like
> > i2c-tools
> I can used?
>
> >No, but I'll ask the same question I already asked Vitor: what would
> >you
> use i3c-tools for? What should it contain? I'm not against the idea,
> but I'd like to delimit the scope of the userspace >interface.
>
>
> Sure, it definitely a user space application.
> I will connect with some i3c device or have loop back interact. I3c
> master <-> i3c slave

>>Sorry, I don't get it. I don't know what you mean by loop back. I also
don't see why you absolutely need a user-space app to interact with a device
when you can develop a simple driver >>running in kernel space, and I see no
answers to these questions in your reply.

>
> > Or any Linux i3c application I can have i3c slave and master loop
> test?
>
> >>Not sure I get this request correctly. Are you talking about a dummy
> >>slave
> driver that would return any data it receives to the TX queue so that
> the next read request coming from the >>master returns what the master
> wrote in its previous write access?
>
>
> >>If that's what you have in mind, then it's definitely not supported.
> >>But before we even consider doing that, we should first introduce
> >>the
> concept of I3C slave controller and then decide how we want to expose
> slave features. Note that Vitor and I disagree >>on the solution: I
> think we should mimic the USB gadget approach (where you can attach a
> generic profile to any USB device controller), and Vitor thinks slave
> IPs should have their
> >>profile/feature-set hardcoded in the driver (which works fine for
> hardcoded slave IPs, but is not that great if the slave block is generic).
>
> Thanks, if I can refer from with I3c-tools, I can start for i3c-master
> and i3c slave dummy test.

>>As I already said above, there's no i3c-tools yet, and there won't be
until we are clear on what this project should contain and what the kernel
<-> userspace interface should look like.

>>Can we have a more detailed description of your use case please?

Sorry for confuse.
Let me explain more.
For example at i2c, In our SOC, we have i2c slave and master. So I can use
I2c slave to be dummy memory device. And I can connect my I2c master and
slave.
I2c master use i2c-tools to have i2cget, i2cset for read/write i2c slave
dummy memory.

So, I just wonder if i3c have some user application that I can have a start
point. It will easy way for me do the same thing.

Regards,

Ryan