The manual of TH1520 contains a set of coefficients a little different
to the driver default ones.

Add them to the device tree node of PVT.

Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
Reviewed-by: Drew Fustini <fustini@kernel.org>
---
Changes in v3:
- Added Drew's R-b.
No changes in v2.

 arch/riscv/boot/dts/thead/th1520.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/riscv/boot/dts/thead/th1520.dtsi b/arch/riscv/boot/dts/thead/th1520.dtsi
index bd5d33840884e..2160c8b6c2261 100644
--- a/arch/riscv/boot/dts/thead/th1520.dtsi
+++ b/arch/riscv/boot/dts/thead/th1520.dtsi
@@ -753,6 +753,10 @@ pvt: pvt@fffff4e000 {
 			reg-names = "common", "ts", "pd", "vm";
 			clocks = <&aonsys_clk>;
 			#thermal-sensor-cells = <1>;
+			moortec,ts-coeff-g = <42740>;
+			moortec,ts-coeff-h = <220500>;
+			moortec,ts-coeff-j = <(-160)>;
+			moortec,ts-coeff-cal5 = <4094>;
 		};
 
 		gpio@fffff52000 {
-- 
2.52.0

On Tue, Mar 10, 2026 at 12:24:57AM +0800, Icenowy Zheng wrote:
> The manual of TH1520 contains a set of coefficients a little different
> to the driver default ones.
> 
> Add them to the device tree node of PVT.
> 
> Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
> Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
> Reviewed-by: Drew Fustini <fustini@kernel.org>
> ---
> Changes in v3:
> - Added Drew's R-b.
> No changes in v2.
> 
>  arch/riscv/boot/dts/thead/th1520.dtsi | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/thead/th1520.dtsi b/arch/riscv/boot/dts/thead/th1520.dtsi
> index bd5d33840884e..2160c8b6c2261 100644
> --- a/arch/riscv/boot/dts/thead/th1520.dtsi
> +++ b/arch/riscv/boot/dts/thead/th1520.dtsi
> @@ -753,6 +753,10 @@ pvt: pvt@fffff4e000 {
>  			reg-names = "common", "ts", "pd", "vm";
>  			clocks = <&aonsys_clk>;
>  			#thermal-sensor-cells = <1>;
> +			moortec,ts-coeff-g = <42740>;
> +			moortec,ts-coeff-h = <220500>;
> +			moortec,ts-coeff-j = <(-160)>;
> +			moortec,ts-coeff-cal5 = <4094>;
>  		};
>  
>  		gpio@fffff52000 {
> -- 
> 2.52.0
>

I have applied this to thead-dt-for-next:

https://git.kernel.org/pub/scm/linux/kernel/git/fustini/linux.git/commit/?h=thead-dt-for-next&id=2592a7072a816be80337b0a85e6279f75498262b

Thanks,
Drew

On Sat, Mar 14, 2026 at 09:57:43AM -0700, Drew Fustini wrote:
> On Tue, Mar 10, 2026 at 12:24:57AM +0800, Icenowy Zheng wrote:
> > The manual of TH1520 contains a set of coefficients a little different
> > to the driver default ones.
> > 
> > Add them to the device tree node of PVT.
> > 
> > Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
> > Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
> > Reviewed-by: Drew Fustini <fustini@kernel.org>
> > ---
> > Changes in v3:
> > - Added Drew's R-b.
> > No changes in v2.
> > 
> >  arch/riscv/boot/dts/thead/th1520.dtsi | 4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/arch/riscv/boot/dts/thead/th1520.dtsi b/arch/riscv/boot/dts/thead/th1520.dtsi
> > index bd5d33840884e..2160c8b6c2261 100644
> > --- a/arch/riscv/boot/dts/thead/th1520.dtsi
> > +++ b/arch/riscv/boot/dts/thead/th1520.dtsi
> > @@ -753,6 +753,10 @@ pvt: pvt@fffff4e000 {
> >  			reg-names = "common", "ts", "pd", "vm";
> >  			clocks = <&aonsys_clk>;
> >  			#thermal-sensor-cells = <1>;
> > +			moortec,ts-coeff-g = <42740>;
> > +			moortec,ts-coeff-h = <220500>;
> > +			moortec,ts-coeff-j = <(-160)>;
> > +			moortec,ts-coeff-cal5 = <4094>;
> >  		};
> >  
> >  		gpio@fffff52000 {
> > -- 
> > 2.52.0
> >
> 
> I have applied this to thead-dt-for-next:

I had removed this due to missing binding in next. However, it is now
again applied to thead-dt-for-next as the binding change is now in
linux-next via the hwmon tree.

https://git.kernel.org/pub/scm/linux/kernel/git/fustini/linux.git/commit/?h=thead-dt-for-next&id=a7aa874b69460896349985833059a764e688f1d0

Thanks,
Drew