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

From: Greentime Hu <greentime.hu@sifive.com>
To: Yash Shah <yash.shah@sifive.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	robh+dt@kernel.org, linux-riscv <linux-riscv@lists.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	devicetree@vger.kernel.org, sachin.ghadi@sifive.com,
	Albert Ou <aou@eecs.berkeley.edu>,
	Anup Patel <anup@brainfault.org>,
	lollivier@baylibre.com, Green Wan <green.wan@sifive.com>,
	Atish Patra <atish.patra@wdc.com>,
	alistair.francis@wdc.com, deepa.kernel@gmail.com,
	bmeng.cn@gmail.com
Subject: Re: [PATCH 0/3] Dynamic CPU frequency switching for the HiFive
Date: Mon, 29 Jun 2020 17:30:18 +0800	[thread overview]
Message-ID: <CAHCEeh+X+0m_oprdS+frRkfbmW7EvWF63xWeJFcQB4_Zc_RUgw@mail.gmail.com> (raw)
In-Reply-To: <1592308864-30205-1-git-send-email-yash.shah@sifive.com>

Yash Shah <yash.shah@sifive.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@sifive.com>