linux-kernel - Re: [PATCH 0/3] Dynamic CPU frequency switching for the HiFive

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Date:   Mon, 29 Jun 2020 17:30:18 +0800
From:   Greentime Hu <greentime.hu@...ive.com>
To:     Yash Shah <yash.shah@...ive.com>
Cc:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>, robh+dt@...nel.org,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        devicetree@...r.kernel.org, sachin.ghadi@...ive.com,
        Albert Ou <aou@...s.berkeley.edu>,
        Anup Patel <anup@...infault.org>, lollivier@...libre.com,
        Green Wan <green.wan@...ive.com>,
        Atish Patra <atish.patra@....com>, alistair.francis@....com,
        deepa.kernel@...il.com, bmeng.cn@...il.com
Subject: Re: [PATCH 0/3] Dynamic CPU frequency switching for the HiFive

Yash Shah <yash.shah@...ive.com> 於 2020年6月16日 週二 下午8:01寫道：
>
> The patch series adds the support for dynamic CPU frequency switching
> for FU540-C000 SoC on the HiFive Unleashed board. All the patches are
> based on Paul Walmsley's work.
>
> This series is based on Linux v5.7 and tested on HiFive unleashed board.
>
> Yash Shah (3):
>   riscv: defconfig, Kconfig: enable CPU power management
>   riscv: dts: fu540-c000: define hart clocks
>   riscv: dts: HiFive Unleashed: define a default set of CPU OPPs
>
>  arch/riscv/Kconfig                                 |  8 +++++
>  arch/riscv/boot/dts/sifive/fu540-c000.dtsi         |  5 +++
>  .../riscv/boot/dts/sifive/hifive-unleashed-a00.dts | 38 ++++++++++++++++++++++
>  arch/riscv/configs/defconfig                       |  5 +++
>  4 files changed, 56 insertions(+)
>

Hi Yash,

Thank you for the patch. It works for me to test with cpufreq-ljt-stress-test.
Here is my log.

CPU stress test, which is doing JPEG decoding by libjpeg-turbo
at different cpufreq operating points.

Testing CPU 0
 1400 MHz ............................................................ OK
  999 MHz ............................................................ OK
  700 MHz ............................................................ OK
  350 MHz ............................................................ OK

Testing CPU 1
 1400 MHz ............................................................ OK
  999 MHz ............................................................ OK
  700 MHz ............................................................ OK
  350 MHz ............................................................ OK

Testing CPU 2
 1400 MHz ............................................................ OK
  999 MHz ............................................................ OK
  700 MHz ............................................................ OK
  350 MHz ............................................................ OK

Testing CPU 3
 1400 MHz ............................................................ OK
  999 MHz ............................................................ OK
  700 MHz ............................................................ OK
  350 MHz ............................................................ OK

Overall result : PASSED

Tested-by: Greentime Hu <greentime.hu@...ive.com>