[PATCH 4/6] riscv: dts: spacemit: k1-musepi-pro: fix maximum CPU core voltage

[Aurelien Jarno]

On the MusePi Pro 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: e2dac7c7a3a8 ("riscv: dts: spacemit: k1-musepi-pro: add PMIC and power infrastructure")
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-musepi-pro.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
index 3078ffb5cb878..246f8f2ab62b9 100644
--- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
@@ -180,14 +180,14 @@ 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