From f045253a03589b2616332560b4120e584342a987 Mon Sep 17 00:00:00 2001 From: Aurelien Jarno Date: Wed, 29 Jul 2026 17:02:21 +0200 Subject: [PATCH] riscv: dts: spacemit: k1-musepi-pro: fix maximum CPU core voltage 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@vger.kernel.org Signed-off-by: Aurelien Jarno Reviewed-by: Yixun Lan Link: https://patch.msgid.link/20260729150722.1598630-5-aurelien@aurel32.net Signed-off-by: Yixun Lan --- 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 3078ffb5cb87..246f8f2ab62b 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@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; };