Re: [PATCH] riscv: dts: spacemit: orangepi-rv2: Add cpu scaling for K1, SoC

[Yixun Lan <dlan@kernel.org>]

Hi Vincent,

 Please send the patch directly instead of attached file, it's more
easy for people to review and apply, suggest to use b4, or
 "git send-email" (old way)


On 08:50 Sun 14 Jun     , Vincent Legoll wrote:
> [RESEND] as I cannot see yesterday's
> 
> 
> Hello,
> 
> 
> 
> I tested (on OrangePi RV2) the attached patch applied over
> 
> spacemit/for-next + Shuwei Wu's V3 series.
> 
> 
> This is a copy/paste of Shuwei Wu's work, so I don't know
> 
> if I can submit this with my SoB or if it should be done
> 
It's ok to add your SoB while adding support for new board

> differently, please advise.
> 
> 
> Anyways, you can add my:
> 
> Tested-by: Vincent Legoll <vincent.legoll@gmail.com> # OrangePi-RV2
> 
> 
> To the relevant patches from your series, if that's useful,
> 
> because it looks like it is working properly:
> 
> 
> On Void linux (musl libc):
> 
> 
> uname -a
> Linux opirv2 7.1.0-rc1-00043-gb860bca13be4 #14 SMP PREEMPT Sat Jun 13 
> 11:02:13 CEST 2026 riscv64 GNU/Linux
> 
> awk --version | head -1
> GNU Awk 5.3.2, API 4.0
> 
> echo userspace > /sys/devices/system/cpu/cpufreq/policy0/scaling_governor
> 
> echo 1600000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
> time awk 'BEGIN{for(i=0;i<1000000;i++){}}'
> real    0m0.300s
> user    0m0.299s
> sys     0m0.001s
> 
> echo 1228800 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
> time awk 'BEGIN{for(i=0;i<1000000;i++){}}'
> real    0m0.432s
> user    0m0.429s
> sys     0m0.004s
> 
> echo 1000000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
> time awk 'BEGIN{for(i=0;i<1000000;i++){}}'
> real    0m0.476s
> user    0m0.476s
> sys     0m0.001s
> 
> echo 819000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
> time awk 'BEGIN{for(i=0;i<1000000;i++){}}'
> real    0m0.582s
> user    0m0.581s
> sys     0m0.001s
> 
> echo 614400 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
> time awk 'BEGIN{for(i=0;i<1000000;i++){}}'
> real    0m0.778s
> user    0m0.773s
> sys     0m0.005s
> 
> -- 
> 
> Vincent Legoll
> 

> From 9924789655ae5f4f98e7a5cdc3df3f34e7bfb659 Mon Sep 17 00:00:00 2001
> From: Vincent Legoll <vincent.legoll@gmail.com>
> Date: Sat, 13 Jun 2026 10:49:34 +0200
> Subject: [PATCH] riscv: dts: spacemit: orangepi-rv2: Add cpu scaling for K1
>  SoC
> 
> Enable CPU DVFS on OrangePi RV2
> 
..
> This is a copy/paste from Shuwei Wu's BPI-F3 DTS modifications
> 
It's quite common that people do copy/paste for additional board
support, no need to mention it in commit message which I think it
isn't really useful


> Signed-off-by: Vincent Legoll <vincent.legoll@gmail.com>
> ---
>  .../boot/dts/spacemit/k1-orangepi-rv2.dts     | 35 ++++++++++++++++++-
>  1 file changed, 34 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
> index 7c49bce427f3..62d25f579af6 100644
> --- a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
> +++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
> @@ -8,6 +8,7 @@
>  
>  #include "k1.dtsi"
>  #include "k1-pinctrl.dtsi"
> +#include "k1-opp.dtsi"
keep alphabet sorted
>  
>  / {
>  	model = "OrangePi RV2";
> @@ -80,6 +81,38 @@ &combo_phy {
>  	status = "okay";
>  };
>  
> +&cpu_0 {
> +       cpu-supply = <&buck1_0v9>;
> +};
> +
> +&cpu_1 {
> +       cpu-supply = <&buck1_0v9>;
> +};
> +
> +&cpu_2 {
> +       cpu-supply = <&buck1_0v9>;
> +};
> +
> +&cpu_3 {
> +       cpu-supply = <&buck1_0v9>;
> +};
> +
> +&cpu_4 {
> +       cpu-supply = <&buck1_0v9>;
> +};
> +
> +&cpu_5 {
> +       cpu-supply = <&buck1_0v9>;
> +};
> +
> +&cpu_6 {
> +       cpu-supply = <&buck1_0v9>;
> +};
> +
> +&cpu_7 {
> +       cpu-supply = <&buck1_0v9>;
> +};
> +
>  &emmc {
>  	bus-width = <8>;
>  	mmc-hs400-1_8v;
> @@ -162,7 +195,7 @@ pmic@41 {
>  		dldoin2-supply = <&buck5>;
>  
>  		regulators {
> -			buck1 {
> +			buck1_0v9: buck1 {
>  				regulator-min-microvolt = <500000>;
>  				regulator-max-microvolt = <3450000>;
>  				regulator-ramp-delay = <5000>;
> -- 
> 2.54.0
> 


-- 
Yixun Lan (dlan)