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Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface

From Heikki Krogerus <heikki.krogerus@linux.intel.com>
Newsgroups linux.kernel
Subject Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface
Date 2016-02-17 12:20 +0100
Message-ID <r38jf-5Bd-5@gated-at.bofh.it> (permalink)
References (5 earlier) <r2OaS-4Q-21@gated-at.bofh.it> <r35bI-3gB-15@gated-at.bofh.it> <r36hs-4dm-1@gated-at.bofh.it> <r37Gy-55s-19@gated-at.bofh.it> <r37Gz-55s-35@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Wed, Feb 17, 2016 at 11:36:52AM +0100, Oliver Neukum wrote:
> On Wed, 2016-02-17 at 12:29 +0200, Felipe Balbi wrote:
> > Hi,
> > 
> > Oliver Neukum <oneukum@suse.com> writes:
> > > On Wed, 2016-02-17 at 09:58 +0200, Heikki Krogerus wrote:
> > >> On Tue, Feb 16, 2016 at 02:39:47PM +0100, Oliver Neukum wrote:
> 
> > >> > Yes, but we need an API. We can't keep adding to it. So if that
> > >> > is to be supported, it needs to be defined now.
> > >> 
> > >> When you say API, do you mean the API the class provides to the
> > >> drivers? Or did you mean ABI which would be the sysfs in this case?
> > >
> > > The API to user space. That is the point. We cannot break user space.
> > > Once this sysfs API is upstream we are stuck with it.
> > 
> > yeah, in fact I have been wondering if sysfs is the best interface to
> 
> That is the discussion we must have.
> 
> > userspace. I talked with Heikki a few days back about this; I was
> > wondering if something like what the NFC folks did with netlink would be
> > better here.
> 
> I doubt that, because the main user is likely to be udev scripts.
> They can easily deal with sysfs attributes.

IMHO for high level interface like this, sysfs is ideal because of the
simple fact that you only need a shell to access the files. netlink
would make us depend on custom software, no?

I'm not against using netlink, but what would be the benefit from it
in this case?


Thanks,

-- 
heikki

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[PATCH 0/3] usb: USB Type-C Class and driver for UCSI Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-09 18:10 +0100
  [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-09 18:10 +0100
    Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Greg KH <gregkh@linuxfoundation.org> - 2016-02-09 19:30 +0100
      Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-10 11:40 +0100
        Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Greg KH <gregkh@linuxfoundation.org> - 2016-02-10 18:30 +0100
          Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-11 15:10 +0100
            Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-15 16:40 +0100
              Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-16 10:30 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-16 14:50 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-17 09:00 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-17 10:10 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Felipe Balbi <balbif@gmail.com> - 2016-02-17 11:40 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-17 11:40 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-17 12:20 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Felipe Balbi <balbi@kernel.org> - 2016-02-17 14:40 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-17 15:30 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Peter Chen <hzpeterchen@gmail.com> - 2016-02-18 10:20 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-18 11:50 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Rajaram R <rajaram.officemail@gmail.com> - 2016-02-18 11:40 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-18 11:50 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Rajaram R <rajaram.officemail@gmail.com> - 2016-02-18 12:10 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Felipe Balbi <balbi@kernel.org> - 2016-02-17 14:40 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-17 15:00 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Felipe Balbi <balbif@gmail.com> - 2016-02-18 08:10 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-18 11:30 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Felipe Balbi <balbif@gmail.com> - 2016-02-18 11:40 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-18 11:50 +0100
        Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Peter Chen <hzpeterchen@gmail.com> - 2016-02-18 10:40 +0100
          Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-18 10:50 +0100
    Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-10 12:30 +0100
      Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-10 13:10 +0100
    Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Andy Shevchenko <andy.shevchenko@gmail.com> - 2016-02-10 13:00 +0100
      Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-10 14:30 +0100
        Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Andy Shevchenko <andy.shevchenko@gmail.com> - 2016-02-10 15:10 +0100
          Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Bjørn Mork <bjorn@mork.no> - 2016-02-10 16:20 +0100
            Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Andy Shevchenko <andy.shevchenko@gmail.com> - 2016-02-11 09:30 +0100
              Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Bjørn Mork <bjorn@mork.no> - 2016-02-11 10:10 +0100
      Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-10 15:20 +0100
        Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Andy Shevchenko <andy.shevchenko@gmail.com> - 2016-02-10 15:30 +0100
          Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.de> - 2016-02-10 16:20 +0100
            Fwd: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Andy Shevchenko <andy.shevchenko@gmail.com> - 2016-02-11 09:20 +0100
              Re: Fwd: [PATCH 2/3] usb: type-c: USB Type-C Connector System  Software Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-11 15:20 +0100
    Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-10 14:10 +0100
      Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-11 15:10 +0100
  [PATCH 3/3] usb: type-c: UCSI ACPI driver Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-09 18:10 +0100
    Re: [PATCH 3/3] usb: type-c: UCSI ACPI driver Greg KH <gregkh@linuxfoundation.org> - 2016-02-09 19:30 +0100
      Re: [PATCH 3/3] usb: type-c: UCSI ACPI driver Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-10 11:30 +0100
  Re: [PATCH 0/3] usb: USB Type-C Class and driver for UCSI Oliver Neukum <oneukum@suse.com> - 2016-02-17 20:00 +0100
    Re: [PATCH 0/3] usb: USB Type-C Class and driver for UCSI Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-18 10:30 +0100
  Re: [PATCH 0/3] usb: USB Type-C Class and driver for UCSI Rajaram R <rajaram.officemail@gmail.com> - 2016-02-17 20:40 +0100
    Re: [PATCH 0/3] usb: USB Type-C Class and driver for UCSI Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-18 12:10 +0100
      Re: [PATCH 0/3] usb: USB Type-C Class and driver for UCSI Oliver Neukum <oneukum@suse.com> - 2016-02-18 12:20 +0100

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