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Message-ID: <4e4dc63d0a0b5a820f7a70e30e29746fd6735a96.camel@redhat.com>
Date:   Mon, 26 Oct 2020 08:46:13 -0500
From:   Dan Williams <dcbw@...hat.com>
To:     Jeffrey Hugo <jhugo@...eaurora.org>,
        Jakub Kicinski <kuba@...nel.org>,
        Hemant Kumar <hemantk@...eaurora.org>
Cc:     manivannan.sadhasivam@...aro.org, gregkh@...uxfoundation.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        bbhatt@...eaurora.org, loic.poulain@...aro.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH v9 3/4] docs: Add documentation for userspace client
 interface

On Mon, 2020-10-26 at 07:38 -0600, Jeffrey Hugo wrote:
> On 10/25/2020 3:46 PM, Jakub Kicinski wrote:
> > On Fri, 23 Oct 2020 16:17:54 -0700 Hemant Kumar wrote:
> > > +UCI driver enables userspace clients to communicate to external
> > > MHI devices
> > > +like modem and WLAN. UCI driver probe creates standard character
> > > device file
> > > +nodes for userspace clients to perform open, read, write, poll
> > > and release file
> > > +operations.
> > 
> > What's the user space that talks to this?
> > 
> 
> Multiple.
> 
> Each channel has a different purpose.  There it is expected that a 
> different userspace application would be using it.
> 
> Hemant implemented the loopback channel, which is a simple channel
> that 
> just sends you back anything you send it.  Typically this is consumed
> by 
> a test application.
> 
> Diag is a typical channel to be consumed by userspace.  This is
> consumed 
> by various applications that talk to the remote device for
> diagnostic 
> information (logs and such).

QMI too?
Dan

> Sahara is another common channel that is usually used for the
> multistage 
> firmware loading process.
> 

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