diff mbox series

[PATCH/RFC,13/14] arm64: dts: renesas: r8a779m1: Add Cortex-A57 2 GHz opp

Message ID b190603bffa0bcc4e66a441fba04132635de3f0c.1623315732.git.geert+renesas@glider.be (mailing list archive)
State New
Delegated to: Geert Uytterhoeven
Headers show
Series arm64: renesas: Add support for R Car H3e 2G-and M3e-2G | expand

Commit Message

Geert Uytterhoeven June 10, 2021, 9:37 a.m. UTC
Add a preliminary operating point for running the Cortex-A57 CPU cores
on R-Car H3e-2G at 2 GHz.

The opp-microvolt value depends on a future update of the Electrical
Characteristics for R-Car H3e-2G.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
 arch/arm64/boot/dts/renesas/r8a779m1.dtsi | 9 +++++++++
 1 file changed, 9 insertions(+)

Comments

Yoshihiro Shimoda June 16, 2021, 11:25 a.m. UTC | #1
Hi Geert-san,

Thank you for the patch!

> From: Geert Uytterhoeven, Sent: Thursday, June 10, 2021 6:37 PM
> 
> Add a preliminary operating point for running the Cortex-A57 CPU cores
> on R-Car H3e-2G at 2 GHz.
> 
> The opp-microvolt value depends on a future update of the Electrical
> Characteristics for R-Car H3e-2G.

Yes, we have to confirm the official document in the future, but...

> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
> ---
>  arch/arm64/boot/dts/renesas/r8a779m1.dtsi | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/renesas/r8a779m1.dtsi b/arch/arm64/boot/dts/renesas/r8a779m1.dtsi
> index 0e9b04469b83c661..01b4e787e5749219 100644
> --- a/arch/arm64/boot/dts/renesas/r8a779m1.dtsi
> +++ b/arch/arm64/boot/dts/renesas/r8a779m1.dtsi
> @@ -10,3 +10,12 @@
>  / {
>  	compatible = "renesas,r8a779m1", "renesas,r8a7795";
>  };
> +
> +&cluster0_opp {
> +	opp-2000000000 {
> +		opp-hz = /bits/ 64 <2000000000>;
> +		opp-microvolt = <1020000>;	// FIXME TBC

I heard this voltage is the same as 1.7GHz's one (0.96V).

Best regards,
Yoshihiro Shimoda

> +		clock-latency-ns = <300000>;
> +		turbo-mode;
> +	};
> +};
> --
> 2.25.1
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/renesas/r8a779m1.dtsi b/arch/arm64/boot/dts/renesas/r8a779m1.dtsi
index 0e9b04469b83c661..01b4e787e5749219 100644
--- a/arch/arm64/boot/dts/renesas/r8a779m1.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a779m1.dtsi
@@ -10,3 +10,12 @@ 
 / {
 	compatible = "renesas,r8a779m1", "renesas,r8a7795";
 };
+
+&cluster0_opp {
+	opp-2000000000 {
+		opp-hz = /bits/ 64 <2000000000>;
+		opp-microvolt = <1020000>;	// FIXME TBC
+		clock-latency-ns = <300000>;
+		turbo-mode;
+	};
+};