Re: [PATCH V5 1/6] SLIMbus: Device management on SLIMbus

From	Arnd Bergmann <arnd@arndb.de>
Newsgroups	linux.kernel
Subject	Re: [PATCH V5 1/6] SLIMbus: Device management on SLIMbus
Date	2016-04-28 19:00 +0200
Message-ID	<rsXse-74R-5@gated-at.bofh.it> (permalink)
References	<rsHx8-1CG-3@gated-at.bofh.it> <rsVJM-5u4-31@gated-at.bofh.it> <rsXiz-6Zu-17@gated-at.bofh.it>
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On Thursday 28 April 2016 17:39:20 Mark Brown wrote:
> > I don't think we have merge new platform support on any
> > architecture that would need this in the past years and
> > stuff like spi_board_info and i2c_board_info is only really
> > used on really old machines (but not going away any time soon
> > either).
> 
> It's not just platforms that use these things though - there's things
> like the SolarFlare NICs where the firmware update mechanism essentially
> involves exposing a SPI flash as part of a PCI device and we just merged
> an ASoC driver for a video card which was reusing some existing IPs and
> chips.
> 

That's of course fine: you essentially have a discoverable bus there,
and if we need something like that, we can always add it later to
any subsystem.

In contrast, the interface in the proposed slimbus subsystem seems
designed for board files, and is in the best case just dead code
that can be removed, or has a risk of being misused e.g. if some
device manufacturer decides to use a board file for this instead
of describing the slimbus slaves in DT.

	Arnd

Thread

[PATCH V5 0/6] Introduce framework for SLIMbus device drivers Sagar Dharia <sdharia@codeaurora.org> - 2016-04-28 02:00 +0200
  [PATCH V5 3/6] slimbus: Add messaging APIs to slimbus framework Sagar Dharia <sdharia@codeaurora.org> - 2016-04-28 02:00 +0200
    Re: [PATCH V5 3/6] slimbus: Add messaging APIs to slimbus framework Arnd Bergmann <arnd@arndb.de> - 2016-04-28 12:00 +0200
  [PATCH V5 6/6] slim: qcom: Add runtime-pm support using clock-pause feature Sagar Dharia <sdharia@codeaurora.org> - 2016-04-28 02:10 +0200
  Re: [PATCH V5 1/6] SLIMbus: Device management on SLIMbus Arnd Bergmann <arnd@arndb.de> - 2016-04-28 12:10 +0200
    Re: [PATCH V5 1/6] SLIMbus: Device management on SLIMbus Mark Brown <broonie@kernel.org> - 2016-04-28 14:00 +0200
      Re: [PATCH V5 1/6] SLIMbus: Device management on SLIMbus Arnd Bergmann <arnd@arndb.de> - 2016-04-28 14:40 +0200
        Re: [PATCH V5 1/6] SLIMbus: Device management on SLIMbus Mark Brown <broonie@kernel.org> - 2016-04-28 16:40 +0200
          Re: [PATCH V5 1/6] SLIMbus: Device management on SLIMbus Arnd Bergmann <arnd@arndb.de> - 2016-04-28 17:10 +0200
            Re: [PATCH V5 1/6] SLIMbus: Device management on SLIMbus Mark Brown <broonie@kernel.org> - 2016-04-28 18:50 +0200
              Re: [PATCH V5 1/6] SLIMbus: Device management on SLIMbus Arnd Bergmann <arnd@arndb.de> - 2016-04-28 19:00 +0200
                Re: [PATCH V5 1/6] SLIMbus: Device management on SLIMbus Mark Brown <broonie@kernel.org> - 2016-04-29 13:20 +0200

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