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Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer

From "Rafael J. Wysocki" <rafael@kernel.org>
Newsgroups linux.kernel
Subject Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer
Date 2016-07-04 15:00 +0200
Message-ID <rRbDI-5I7-15@gated-at.bofh.it> (permalink)
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On Fri, Jul 1, 2016 at 11:04 PM, Rafael J. Wysocki <rjw@rjwysocki.net> wrote:
> On Friday, July 01, 2016 04:23:40 PM Will Deacon wrote:
>> On Thu, Jun 30, 2016 at 09:48:02PM +0800, Hanjun Guo wrote:
>> > On 2016/6/30 21:27, Rafael J. Wysocki wrote:
>> > >On Thursday, June 30, 2016 10:10:02 AM Hanjun Guo wrote:
>> > >>GTDT is part of ACPI spec, drivers/acpi/ is for driver code of
>> > >>ACPI spec, I think it can stay in drivers/acpi/ from this point
>> > >>of view, am I right?
>> > >
>> > >The question is not "Can it?", but "Does it need to?".
>> > >
>> > >It is in the spec, but still there's only one architecture needing it.
>> > >
>> > >There is no way to test it on any other architecture and no reason to build it
>> > >for any other architecture, so why does it need to be located in drivers/acpi/ ?
>> >
>> > I'm fine to move it to other places such as arch/arm64/kernel/, but I
>> > would like to ask ARM64 maintainer's suggestion for this.
>> >
>> > Will, Catalin, what's your opinion on this?
>>
>> We don't have any device-tree code for the architected timer under
>> arch/arm64, so I don't see why we should need anything for ACPI either.
>
> And I don't see a reason for the GTDT code to be there in drivers/acpi/.
>
> What gives?

Well, since there are things like acpi_lpss in there, my position here
is kind of weak. :-)

That said I'm not particularly happy with having them in
drivers/acpi/, so I definitely won't object against attempts to moving
them somewhere else.

> Maybe it should go to the same place as the analogus DT code, then?

I'm mostly concerned about how (and by whom) that code is going to be
maintained going forward, though.  I also think it should be made
clear that it is ARM64-only.

Thanks,
Rafael

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[PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer fu.wei@linaro.org - 2016-06-29 20:20 +0200
  [PATCH v6 06/10] acpi: Add GTDT driver to kernel build system fu.wei@linaro.org - 2016-06-29 20:20 +0200
  [PATCH v6 04/10] acpi: Add some basic struct and functions in GTDT driver fu.wei@linaro.org - 2016-06-29 20:20 +0200
    Re: [PATCH v6 04/10] acpi: Add some basic struct and functions in  GTDT driver "Rafael J. Wysocki" <rafael@kernel.org> - 2016-06-29 23:30 +0200
      Re: [PATCH v6 04/10] acpi: Add some basic struct and functions in  GTDT driver Fu Wei <fu.wei@linaro.org> - 2016-06-30 03:20 +0200
        Re: [PATCH v6 04/10] acpi: Add some basic struct and functions in GTDT driver "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-06-30 03:30 +0200
          Re: [PATCH v6 04/10] acpi: Add some basic struct and functions in  GTDT driver Fu Wei <fu.wei@linaro.org> - 2016-06-30 03:40 +0200
          Re: [PATCH v6 04/10] acpi: Add some basic struct and functions in  GTDT driver Timur Tabi <timur@codeaurora.org> - 2016-06-30 06:20 +0200
  [PATCH v6 09/10] clocksource/drivers/arm_arch_timer: Add GTDT support for memory-mapped timer fu.wei@linaro.org - 2016-06-29 20:20 +0200
  [PATCH v6 05/10] acpi: Add arch_timer support in GTDT table parse driver fu.wei@linaro.org - 2016-06-29 20:20 +0200
  [PATCH v6 01/10] clocksource/drivers/arm_arch_timer: Move enums and defines to header file fu.wei@linaro.org - 2016-06-29 20:20 +0200
  [PATCH v6 08/10] acpi: Add memory-mapped timer support in GTDT driver fu.wei@linaro.org - 2016-06-29 20:20 +0200
  [PATCH v6 07/10] clocksource/drivers/arm_arch_timer: Simplify ACPI support code. fu.wei@linaro.org - 2016-06-29 20:20 +0200
  [PATCH v6 03/10] clocksource/drivers/arm_arch_timer: Improve printk relevant code fu.wei@linaro.org - 2016-06-29 20:20 +0200
    Re: [PATCH v6 03/10] clocksource/drivers/arm_arch_timer: Improve  printk relevant code Hanjun Guo <hanjun.guo@linaro.org> - 2016-06-30 05:00 +0200
      Re: [PATCH v6 03/10] clocksource/drivers/arm_arch_timer: Improve  printk relevant code Fu Wei <fu.wei@linaro.org> - 2016-07-07 18:20 +0200
  [PATCH v6 02/10] clocksource/drivers/arm_arch_timer: Add a new enum for spi type fu.wei@linaro.org - 2016-06-29 20:20 +0200
  [PATCH v6 10/10] acpi: Add SBSA Generic Watchdog support in GTDT driver fu.wei@linaro.org - 2016-06-29 20:30 +0200
  Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT  support in arm_arch_timer "Rafael J. Wysocki" <rafael@kernel.org> - 2016-06-29 23:40 +0200
    Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT  support in arm_arch_timer Fu Wei <fu.wei@linaro.org> - 2016-06-30 03:40 +0200
      Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-06-30 03:40 +0200
        Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT  support in arm_arch_timer Hanjun Guo <hanjun.guo@linaro.org> - 2016-06-30 04:20 +0200
          Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-06-30 15:30 +0200
            Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT  support in arm_arch_timer Hanjun Guo <hanjun.guo@linaro.org> - 2016-06-30 16:10 +0200
              Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT  support in arm_arch_timer Will Deacon <will.deacon@arm.com> - 2016-07-01 17:30 +0200
                Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-07-01 23:00 +0200
                Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT  support in arm_arch_timer "Rafael J. Wysocki" <rafael@kernel.org> - 2016-07-04 15:00 +0200
                Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT  support in arm_arch_timer Graeme Gregory <gg@slimlogic.co.uk> - 2016-07-05 16:20 +0200
                Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT  support in arm_arch_timer "Rafael J. Wysocki" <rafael@kernel.org> - 2016-07-06 02:10 +0200
                Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT  support in arm_arch_timer Hanjun Guo <hanjun.guo@linaro.org> - 2016-07-07 13:20 +0200
                Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-07-07 14:00 +0200
                Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT  support in arm_arch_timer Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2016-07-07 15:40 +0200
                Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-07-07 16:00 +0200
                Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT  support in arm_arch_timer Fu Wei <fu.wei@linaro.org> - 2016-07-07 17:30 +0200
                Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT  support in arm_arch_timer Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2016-07-08 15:30 +0200
                Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT  support in arm_arch_timer Sudeep Holla <sudeep.holla@arm.com> - 2016-07-08 16:00 +0200
                Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT  support in arm_arch_timer Hanjun Guo <hanjun.guo@linaro.org> - 2016-07-09 05:50 +0200
                Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT  support in arm_arch_timer Hanjun Guo <hanjun.guo@linaro.org> - 2016-07-09 05:10 +0200
            Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT  support in arm_arch_timer Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-07-01 16:10 +0200
              Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-07-01 23:00 +0200
                Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT  support in arm_arch_timer Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-07-04 15:50 +0200
                Re: [PATCH v6 00/10] acpi, clocksource: add GTDT driver and GTDT  support in arm_arch_timer "Rafael J. Wysocki" <rafael@kernel.org> - 2016-07-04 16:20 +0200

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