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.

Reviewed-by: Shree Ramamoorthy <s-ramamoorthy@ti.com>
Signed-off-by: Kory Maincent (TI) <kory.maincent@bootlin.com>
---
I was pinged that the following series was not fully merged: the devicetree
change did not land upstream.
https://lore.kernel.org/r/20251218-fix_tps65219-v5-0-8bb511417f3a@bootlin.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;
 			};

---
base-commit: 238650ef6c7c7cca08e032527329424c9fbd70e5
change-id: 20251106-fix_tps65219-dd62141d22cf

Best regards,
--  
Köry Maincent, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

On Thu, 17 Sep 2026 11:01:34 +0200, Kory Maincent (TI.com) wrote:
> 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.
> 
> [...]

Applied, thanks!

[1/1] ARM: dts: am335x-bonegreen-eco: Enable 1GHz OPP by increasing vdd_mpu voltage
      commit: c3037b5c7c38bdf78c214e7dbe513a553ce8f47b

Best regards,
-- 
Kevin Hilman (TI) <khilman@baylibre.com>

"Kory Maincent (TI.com)" <kory.maincent@bootlin.com> writes:

> 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.
>
> Reviewed-by: Shree Ramamoorthy <s-ramamoorthy@ti.com>
> Signed-off-by: Kory Maincent (TI) <kory.maincent@bootlin.com>
> ---
> I was pinged that the following series was not fully merged: the devicetree
> change did not land upstream.
> https://lore.kernel.org/r/20251218-fix_tps65219-v5-0-8bb511417f3a@bootlin.com

Thanks for the reminder.  Queuing for v7.4.

Kevin