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riscv: dts: spacemit: k1-bananapi-cm6: fix maximum CPU core voltage

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On the Banana Pi BPI-CM6 module, 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: 46a8c01700 ("riscv: dts: spacemit: k1: Add Banana Pi BPI-CM6 IO board")
Link: https://sashiko.dev/#/message/20260728211020.1248676-2-aurelien%40aurel32.net
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Yixun Lan <dlan@kernel.org>
Link: https://patch.msgid.link/20260729150722.1598630-7-aurelien@aurel32.net
Signed-off-by: Yixun Lan <dlan@kernel.org>
This commit is contained in:
Aurelien Jarno 2026-07-29 17:02:23 +02:00 committed by Yixun Lan
parent d66267c350
commit a65e9b73b0
1 changed files with 2 additions and 2 deletions
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4
arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi
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@ -114,14 +114,14 @@ 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;
};