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Re: [PATCH 7/8] clocksource/drivers/fttmr010: Merge Moxa into FTTMR010

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On Thu, May 18, 2017 at 9:22 AM, Joel Stanley <joel@jms.id.au> wrote:
> On Wed, May 17, 2017 at 10:05 PM, Linus Walleij
> <linus.walleij@linaro.org> wrote:
>> This merges the Moxa Art timer driver into the Faraday FTTMR010
>> driver and replaces all Kconfig symbols to use the Faraday
>> driver instead. We are now so similar that the drivers can
>> be merged by just adding a few lines to the Faraday timer.
>
> Nice work!
>
> I gave this a spin on hardware and it didn't work :(

How typical.

> Thanks for the rework! Unfortunately the Aspeed IP does not have bits
> to control the direction of counting, and the timers only count down.
> Bits 3, 7 and 11 are marked reserved in the data sheet. Can you rework
> the patch to count down?

How unintuitive.

I guess I will just make it handle the Aspeed separately, so we
count up on Gemini and Moxa and down on Aspeed if that is all
it can do.

> As an aside, we have a pretty decent model for the Aspeed SoCs in
> Qemu. If you want to use it to smoketest your rework:
>
>  $ qemu-system-arm -m 512 -M ast2500-evb -nodefaults -nographic
> -serial stdio -kernel arch/arm/boot/zImage -dtb
> arch/arm/boot/dts/aspeed-ast2500-evb.dtb
>
> I tested with Ubuntu's qemu v2.8. It looks like we have a bug when the
> kernel tries to use the clock the way your driver works, so we will
> look at that. It does function properly for the current upstream code.

Oh that's sweet! I'll test it if I can get it working like this.

Yours,
Linus Walleij

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[PATCH 0/8] clocksource: Generalize Faraday timer Linus Walleij <linus.walleij@linaro.org> - 2017-05-17 16:10 +0200
  [PATCH 8/8] ARM: dts: augment Moxa and Aspeed DTS for FTTMR010 Linus Walleij <linus.walleij@linaro.org> - 2017-05-17 16:10 +0200
  [PATCH 5/8] clocksource/drivers/fttmr010: Switch to use bitops Linus Walleij <linus.walleij@linaro.org> - 2017-05-17 16:10 +0200
  [PATCH 2/8] clocksource/drivers/fttmr010: Merge FTTMR010 DT bindings Linus Walleij <linus.walleij@linaro.org> - 2017-05-17 16:10 +0200
    Re: [PATCH 2/8] clocksource/drivers/fttmr010: Merge FTTMR010 DT  bindings Rob Herring <robh@kernel.org> - 2017-05-23 03:00 +0200
  [PATCH 3/8] clocksource/drivers/fttmr010: Drop Gemini specifics Linus Walleij <linus.walleij@linaro.org> - 2017-05-17 16:10 +0200
  [PATCH 6/8] clocksource/drivers/fttmr010: Switch to use TIMER2 src Linus Walleij <linus.walleij@linaro.org> - 2017-05-17 16:10 +0200
  [PATCH 7/8] clocksource/drivers/fttmr010: Merge Moxa into FTTMR010 Linus Walleij <linus.walleij@linaro.org> - 2017-05-17 16:10 +0200
    Re: [PATCH 7/8] clocksource/drivers/fttmr010: Merge Moxa into FTTMR010 Joel Stanley <joel@jms.id.au> - 2017-05-18 09:30 +0200
      Re: [PATCH 7/8] clocksource/drivers/fttmr010: Merge Moxa into FTTMR010 Linus Walleij <linus.walleij@linaro.org> - 2017-05-18 14:50 +0200
        Re: [PATCH 7/8] clocksource/drivers/fttmr010: Merge Moxa into  FTTMR010 Cédric Le Goater <clg@kaod.org> - 2017-05-18 16:40 +0200
        Re: [PATCH 7/8] clocksource/drivers/fttmr010: Merge Moxa into FTTMR010 Linus Walleij <linus.walleij@linaro.org> - 2017-05-18 22:30 +0200
          Re: [PATCH 7/8] clocksource/drivers/fttmr010: Merge Moxa into  FTTMR010 Cédric Le Goater <clg@kaod.org> - 2017-05-18 23:10 +0200
            Re: [PATCH 7/8] clocksource/drivers/fttmr010: Merge Moxa into  FTTMR010 Cédric Le Goater <clg@kaod.org> - 2017-05-19 10:00 +0200
  [PATCH 4/8] clocksource/drivers/fttmr010: Use state container Linus Walleij <linus.walleij@linaro.org> - 2017-05-17 16:10 +0200
  [PATCH 1/8] clocksource/drivers/fttmr010: Fix the clock handling Linus Walleij <linus.walleij@linaro.org> - 2017-05-17 16:10 +0200
  Re: [PATCH 0/8] clocksource: Generalize Faraday timer Jonas Jensen <jonas.jensen@gmail.com> - 2017-05-18 12:40 +0200
    Re: [PATCH 0/8] clocksource: Generalize Faraday timer Linus Walleij <linus.walleij@linaro.org> - 2017-05-18 14:20 +0200
      Re: [PATCH 0/8] clocksource: Generalize Faraday timer Daniel Lezcano <daniel.lezcano@linaro.org> - 2017-05-18 15:40 +0200

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