From: Shuwei Wu <shuwei.wu@mailbox.org>
To: "Rafael J. Wysocki" <rafael@kernel.org>,
Viresh Kumar <viresh.kumar@linaro.org>,
Yixun Lan <dlan@gentoo.org>, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Paul Walmsley <pjw@kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Alexandre Ghiti <alex@ghiti.fr>
Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-riscv@lists.infradead.org, spacemit@lists.linux.dev,
devicetree@vger.kernel.org, Shuwei Wu <shuwei.wu@mailbox.org>
Subject: [PATCH 0/2] cpufreq: spacemit: Add cpufreq support for K1 SoC
Date: Sun, 08 Mar 2026 13:17:38 +0800 [thread overview]
Message-ID: <20260308-shadow-deps-v1-0-0ceb5c7c07eb@mailbox.org> (raw)
This series enables dynamic voltage and frequency scaling (DVFS) for
the SpacemiT K1 SoC using the generic cpufreq-dt driver.
Tested on OrangePi-RV2, the execution time scales as expected
across different CPU frequencies:
~ # echo userspace > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
~ # echo 1600000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
~ # time awk 'BEGIN{for(i=0;i<1000000;i++){}}'
real 0m 1.07s
user 0m 1.07s
sys 0m 0.00s
~ # echo 1228800 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
~ # time awk 'BEGIN{for(i=0;i<1000000;i++){}}'
real 0m 1.40s
user 0m 1.40s
sys 0m 0.00s
~ # echo 1000000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
~ # time awk 'BEGIN{for(i=0;i<1000000;i++){}}'
real 0m 1.72s
user 0m 1.72s
sys 0m 0.00s
~ # echo 819000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
~ # time awk 'BEGIN{for(i=0;i<1000000;i++){}}'
real 0m 2.10s
user 0m 2.10s
sys 0m 0.00s
~ # echo 614400 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
~ # time awk 'BEGIN{for(i=0;i<1000000;i++){}}'
real 0m 2.80s
user 0m 2.80s
sys 0m 0.00s
Signed-off-by: Shuwei Wu <shuwei.wu@mailbox.org>
---
Shuwei Wu (2):
cpufreq: dt-platdev: Add SpacemiT K1 SoC to the allowlist
riscv: dts: spacemit: Add cpu scaling for K1 SoC
arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts | 34 +++++++++-
arch/riscv/boot/dts/spacemit/k1.dtsi | 86 +++++++++++++++++++++++++
drivers/cpufreq/cpufreq-dt-platdev.c | 1 +
3 files changed, 120 insertions(+), 1 deletion(-)
---
base-commit: 5164e95565d3fd508ca8a95351323f5716dfb695
change-id: 20260307-shadow-deps-3582a78aa756
prerequisite-patch-id: 154bd4f720ce5065d58b988de8f273207b44572e
prerequisite-message-id: <20260206-spacemit-p1-v4-0-8f695d93811e@riscstar.com>
prerequisite-patch-id: 5da3e75b18291a5540d4f66d7a0600fb8975ef62
prerequisite-patch-id: bcf41917414ecef8cf743095d130f6004c32f6a5
prerequisite-patch-id: cfe3800f8c791ec4c63e070af9628e88e0fc31b9
prerequisite-message-id: <20260305-k1-clk-fix-v1-1-abca85d6e266@mailbox.org>
prerequisite-patch-id: 7c7fb9f87dba019ece4c97c45750349a7cd28f3a
Best regards,
--
Shuwei Wu <shuwei.wu@mailbox.org>
next reply other threads:[~2026-03-08 5:18 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-08 5:17 Shuwei Wu [this message]
2026-03-08 5:17 ` [PATCH 1/2] cpufreq: dt-platdev: Add SpacemiT K1 SoC to the allowlist Shuwei Wu
2026-03-08 5:17 ` [PATCH 2/2] riscv: dts: spacemit: Add cpu scaling for K1 SoC Shuwei Wu
2026-03-08 17:59 ` Samuel Holland
2026-03-09 2:45 ` Shuwei Wu
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