linux-kernel - [PATCH v2 2/2] ARM: dts: am335x-bonegreen-eco: Enable 1GHz OPP by increasing vdd

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Message-Id: <20251106-fix_tps65219-v2-2-a7d608c4272f@bootlin.com>
Date: Thu, 06 Nov 2025 11:49:03 +0100
From: "Kory Maincent (TI.com)" <kory.maincent@...tlin.com>
To: Aaro Koskinen <aaro.koskinen@....fi>, 
 Andreas Kemnade <andreas@...nade.info>, Kevin Hilman <khilman@...libre.com>, 
 Roger Quadros <rogerq@...nel.org>, Tony Lindgren <tony@...mide.com>, 
 Lee Jones <lee@...nel.org>, Shree Ramamoorthy <s-ramamoorthy@...com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: Andrew Davis <afd@...com>, Bajjuri Praneeth <praneeth@...com>, 
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, linux-omap@...r.kernel.org, 
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
 "Kory Maincent (TI.com)" <kory.maincent@...tlin.com>
Subject: [PATCH v2 2/2] ARM: dts: am335x-bonegreen-eco: Enable 1GHz OPP by
 increasing vdd_mpu voltage

The vdd_mpu regulator maximum voltage was previously limited to 1.2985V,
which prevented the CPU from reaching the 1GHz operating point. This
limitation was put in place because voltage changes were not working
correctly, causing the board to stall when attempting higher frequencies.

With the recent TPS65219 PMIC driver fixes that properly implement the
LOCK register handling, voltage transitions now work reliably. Increase
the maximum voltage to 1.3515V to allow the full 1GHz OPP to be used.

Signed-off-by: Kory Maincent (TI.com) <kory.maincent@...tlin.com>
---
 arch/arm/boot/dts/ti/omap/am335x-bonegreen-eco.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/ti/omap/am335x-bonegreen-eco.dts b/arch/arm/boot/dts/ti/omap/am335x-bonegreen-eco.dts
index d21118cdb6c2c..f00abfdd2cbd4 100644
--- a/arch/arm/boot/dts/ti/omap/am335x-bonegreen-eco.dts
+++ b/arch/arm/boot/dts/ti/omap/am335x-bonegreen-eco.dts
@@ -63,7 +63,7 @@ regulators {
 			buck1: buck1 {
 				regulator-name = "vdd_mpu";
 				regulator-min-microvolt = <925000>;
-				regulator-max-microvolt = <1298500>;
+				regulator-max-microvolt = <1351500>;
 				regulator-boot-on;
 				regulator-always-on;
 			};

-- 
2.43.0