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

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 <[email protected]> # 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 <[email protected]>
> 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 <[email protected]>
> ---
>  .../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)