linux-kernel - [PATCH 5/6] arm64: dts: freescale: imx8mp-skov: operate SoC in nominal mode

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Message-Id: <20241219-imx8m-clk-v1-5-cfaffa087da6@pengutronix.de>
Date: Thu, 19 Dec 2024 08:27:36 +0100
From: Ahmad Fatoum <a.fatoum@...gutronix.de>
To: Abel Vesa <abelvesa@...nel.org>, Peng Fan <peng.fan@....com>, 
 Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, Abel Vesa <abel.vesa@...aro.org>, 
 Marek Vasut <marex@...x.de>
Cc: linux-clk@...r.kernel.org, imx@...ts.linux.dev, 
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, Ahmad Fatoum <a.fatoum@...gutronix.de>
Subject: [PATCH 5/6] arm64: dts: freescale: imx8mp-skov: operate SoC in
 nominal mode

To reduce heat generation, the Skov i.MX8MP boards should run in nominal
drive mode with a VDD_SOC voltage of 850 mV.

At this operating point, not all frequencies that are achievable with
overdrive mode are possible, so import imx8mp-nominal.dtsi to clock down
the clocks.

Signed-off-by: Ahmad Fatoum <a.fatoum@...gutronix.de>
---
 arch/arm64/boot/dts/freescale/imx8mp-skov-reva.dtsi | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-skov-reva.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-skov-reva.dtsi
index 59813ef8e2bb..9dc36517e90c 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-skov-reva.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp-skov-reva.dtsi
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
 
 #include "imx8mp.dtsi"
+#include "imx8mp-nominal.dtsi"
 
 #include <dt-bindings/leds/common.h>
 
@@ -237,8 +238,8 @@ pmic@25 {
 		regulators {
 			reg_vdd_soc: BUCK1 {
 				regulator-name = "VDD_SOC";
-				regulator-min-microvolt = <600000>;
-				regulator-max-microvolt = <2187500>;
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <850000>;
 				vin-supply = <&reg_5v_p>;
 				regulator-boot-on;
 				regulator-always-on;

-- 
2.39.5