[PATCH 3/6] riscv: dts: spacemit: k1-orangepi-rv2: fix maximum CPU core voltage

[Aurelien Jarno]

On the OrangePi RV2 board, the buck1 and buck2 voltage regulators, which
supply the CPU core voltage, are configured with a maximum output
voltage of 3.45V, while the highest operating point requires only
1.050V. This means that a kernel bug, OPP misconfiguration, or
privileged userspace could request a voltage above the safe operating
limit, causing possible permanent CPU damage.

Set the maximum regulator voltage to 1.050V instead.

Fixes: c02c047b925c ("riscv: dts: spacemit: Define the P1 PMIC regulators for OrangePi RV2")
Link: https://sashiko.dev/#/message/20260728211020.1248676-2-aurelien%40aurel32.net
Cc: stable at vger.kernel.org
Signed-off-by: Aurelien Jarno <aurelien at aurel32.net>
---
 arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
index 7c49bce427f30..b907a1396b21f 100644
--- a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
@@ -164,14 +164,14 @@ pmic at 41 {
 		regulators {
 			buck1 {
 				regulator-min-microvolt = <500000>;
-				regulator-max-microvolt = <3450000>;
+				regulator-max-microvolt = <1050000>;
 				regulator-ramp-delay = <5000>;
 				regulator-always-on;
 			};
 
 			buck2 {
 				regulator-min-microvolt = <500000>;
-				regulator-max-microvolt = <3450000>;
+				regulator-max-microvolt = <1050000>;
 				regulator-ramp-delay = <5000>;
 				regulator-always-on;
 			};
-- 
2.53.0