2021-03-26 10:52:35

by Geert Uytterhoeven

Subject: [PATCH 0/2] arm64: dts: renesas: Add cpu-supply properties for DVFS

Hi all,

This patch series adds the cpu-supply properties to the a57_0 nodes on
the Salvator-X(S) and ULCB development boards, so Dynamic Voltage and
Frequency Scaling (DVFS) can change the CPU core voltages.
This is a prerequisite for enabling CPU boost modes.

To be queued in renesas-devel for 5.13.

Dien Pham (1):
arm64: dts: renesas: salvator-common: Add cpu-supply property to a57_0
node

Yusuke Goda (1):
arm64: dts: renesas: ulcb: Add cpu-supply property to a57_0 node

arch/arm64/boot/dts/renesas/salvator-common.dtsi | 4 ++++
arch/arm64/boot/dts/renesas/ulcb.dtsi | 4 ++++
2 files changed, 8 insertions(+)

--
2.25.1

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds

2021-03-26 10:54:15

by Geert Uytterhoeven

Subject: [PATCH 2/2] arm64: dts: renesas: ulcb: Add cpu-supply property to a57_0 node

From: Yusuke Goda <[email protected]>

Add the cpu-supply property to the a57_0 node, so Dynamic Voltage and
Frequency Scaling (DVFS) can change the CPU core voltage.

Signed-off-by: Yusuke Goda <[email protected]>
Signed-off-by: Takeshi Kihara <[email protected]>
Signed-off-by: Geert Uytterhoeven <[email protected]>
---
arch/arm64/boot/dts/renesas/ulcb.dtsi | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/ulcb.dtsi b/arch/arm64/boot/dts/renesas/ulcb.dtsi
index 14b211f357f8894a..1f177af3eb9dfa37 100644
--- a/arch/arm64/boot/dts/renesas/ulcb.dtsi
+++ b/arch/arm64/boot/dts/renesas/ulcb.dtsi
@@ -138,6 +138,10 @@ x23_clk: x23-clock {
};
};

+&a57_0 {
+ cpu-supply = <&dvfs>;
+};
+
&audio_clk_a {
clock-frequency = <22579200>;
};
--
2.25.1