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Re: [RFC 2/5] i3c: Add core I3C infrastructure

From Boris Brezillon <boris.brezillon@free-electrons.com>
Newsgroups linux.kernel
Subject Re: [RFC 2/5] i3c: Add core I3C infrastructure
Date 2017-08-01 23:50 +0200
Message-ID <u9Nd7-UI-1@gated-at.bofh.it> (permalink)
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Le Tue, 1 Aug 2017 19:27:03 +0200,
Wolfram Sang <wsa@the-dreams.de> a écrit :

> > I'm surprised they didn't allow for slave clock stretching when
> > communicating with a legacy i2c device, it will prohibit use of a rather
> > large class of devices. :(  
> 
> Yes, but I3C is push/pull IIRC.

It is.

> 
> > As for interrupts you are always free to wire up an out-of-band
> > interrupt like before. :)  
> 
> Yes, my wording was a bit too strong. It is possible, sure. Yet, I
> understood that one of the features of I3C is to have in-band interrupt
> support. We will see if the demand for backward compatibility or "saving
> pins" is higher.
> 

Indeed, you can use in-band interrupts if your device is able to
generate them, but that doesn't prevent I3C device designers from using
an external pin to signal interrupts if they prefer.

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Thread

[RFC 0/5] Add I3C subsystem Boris Brezillon <boris.brezillon@free-electrons.com> - 2017-07-31 18:30 +0200
  [RFC 5/5] dt-bindings: i3c: Document Cadence I3C master bindings Boris Brezillon <boris.brezillon@free-electrons.com> - 2017-07-31 18:30 +0200
  Re: [RFC 2/5] i3c: Add core I3C infrastructure Wolfram Sang <wsa@the-dreams.de> - 2017-07-31 21:20 +0200
    Re: [RFC 2/5] i3c: Add core I3C infrastructure Boris Brezillon <boris.brezillon@free-electrons.com> - 2017-07-31 22:50 +0200
  Re: [RFC 0/5] Add I3C subsystem Wolfram Sang <wsa@the-dreams.de> - 2017-07-31 21:20 +0200
    Re: [RFC 0/5] Add I3C subsystem Wolfram Sang <wsa@the-dreams.de> - 2017-07-31 22:50 +0200
    Re: [RFC 0/5] Add I3C subsystem Boris Brezillon <boris.brezillon@free-electrons.com> - 2017-07-31 22:50 +0200
  Re: [RFC 2/5] i3c: Add core I3C infrastructure Arnd Bergmann <arnd@arndb.de> - 2017-07-31 22:20 +0200
    Re: [RFC 2/5] i3c: Add core I3C infrastructure Boris Brezillon <boris.brezillon@free-electrons.com> - 2017-07-31 23:20 +0200
      Re: [RFC 2/5] i3c: Add core I3C infrastructure Wolfram Sang <wsa@the-dreams.de> - 2017-07-31 23:50 +0200
        Re: [RFC 2/5] i3c: Add core I3C infrastructure "Andrew F. Davis" <afd@ti.com> - 2017-08-01 18:50 +0200
          Re: [RFC 2/5] i3c: Add core I3C infrastructure Wolfram Sang <wsa@the-dreams.de> - 2017-08-01 19:30 +0200
            Re: [RFC 2/5] i3c: Add core I3C infrastructure Boris Brezillon <boris.brezillon@free-electrons.com> - 2017-08-01 23:50 +0200
              Re: [RFC 2/5] i3c: Add core I3C infrastructure Wolfram Sang <wsa@the-dreams.de> - 2017-08-02 12:30 +0200
      Re: [RFC 2/5] i3c: Add core I3C infrastructure Arnd Bergmann <arnd@arndb.de> - 2017-08-01 14:10 +0200
        Re: [RFC 2/5] i3c: Add core I3C infrastructure Boris Brezillon <boris.brezillon@free-electrons.com> - 2017-08-01 14:30 +0200
          Re: [RFC 2/5] i3c: Add core I3C infrastructure Arnd Bergmann <arnd@arndb.de> - 2017-08-01 15:20 +0200
            Re: [RFC 2/5] i3c: Add core I3C infrastructure Boris Brezillon <boris.brezillon@free-electrons.com> - 2017-08-01 15:40 +0200
              Re: [RFC 2/5] i3c: Add core I3C infrastructure Boris Brezillon <boris.brezillon@free-electrons.com> - 2017-08-01 16:00 +0200
                Re: [RFC 2/5] i3c: Add core I3C infrastructure Arnd Bergmann <arnd@arndb.de> - 2017-08-01 16:30 +0200
                Re: [RFC 2/5] i3c: Add core I3C infrastructure Boris Brezillon <boris.brezillon@free-electrons.com> - 2017-08-01 17:20 +0200
                Re: [RFC 2/5] i3c: Add core I3C infrastructure Arnd Bergmann <arnd@arndb.de> - 2017-08-01 22:20 +0200
              Re: [RFC 2/5] i3c: Add core I3C infrastructure Wolfram Sang <wsa@the-dreams.de> - 2017-08-01 16:20 +0200
                Re: [RFC 2/5] i3c: Add core I3C infrastructure Boris Brezillon <boris.brezillon@free-electrons.com> - 2017-08-01 16:50 +0200
                Re: [RFC 2/5] i3c: Add core I3C infrastructure Wolfram Sang <wsa@the-dreams.de> - 2017-08-01 17:10 +0200
                Re: [RFC 2/5] i3c: Add core I3C infrastructure Boris Brezillon <boris.brezillon@free-electrons.com> - 2017-08-01 17:30 +0200
                Re: [RFC 2/5] i3c: Add core I3C infrastructure Boris Brezillon <boris.brezillon@free-electrons.com> - 2017-08-03 10:10 +0200
  Re: [RFC 2/5] i3c: Add core I3C infrastructure Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-01 03:50 +0200
    Re: [RFC 2/5] i3c: Add core I3C infrastructure Boris Brezillon <boris.brezillon@free-electrons.com> - 2017-08-01 12:50 +0200
      Re: [RFC 2/5] i3c: Add core I3C infrastructure Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-01 20:00 +0200
        Re: [RFC 2/5] i3c: Add core I3C infrastructure Boris Brezillon <boris.brezillon@free-electrons.com> - 2017-08-01 23:40 +0200
          Re: [RFC 2/5] i3c: Add core I3C infrastructure Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-02 03:00 +0200
          Re: [RFC 2/5] i3c: Add core I3C infrastructure Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-02 04:20 +0200

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