diff options
| author | Aurelien Jarno <aurelien@aurel32.net> | 2026-07-29 17:02:19 +0200 |
|---|---|---|
| committer | Yixun Lan <dlan@kernel.org> | 2026-07-30 08:56:12 +0000 |
| commit | 56a77ddae794ca0516fc146f6e59bb8cdf4fd9d2 (patch) | |
| tree | 3b68200150db1357f9848aaf1b8e2af9829e0df0 | |
| parent | b496282ee4ad07311a13489e15b74fb7078d9a01 (diff) | |
| download | linux-56a77ddae794ca0516fc146f6e59bb8cdf4fd9d2.tar.gz linux-56a77ddae794ca0516fc146f6e59bb8cdf4fd9d2.zip | |
riscv: dts: spacemit: k1-milkv-jupiter: fix maximum CPU core voltage
On the Milk-V Jupiter 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: 7d307daa12b1 ("riscv: dts: spacemit: Define the P1 PMIC regulators for Milk-V Jupiter")
Link: https://sashiko.dev/#/message/20260728211020.1248676-2-aurelien%40aurel32.net
Cc: stable@vger.kernel.org
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Yixun Lan <dlan@kernel.org>
Link: https://patch.msgid.link/20260729150722.1598630-3-aurelien@aurel32.net
Signed-off-by: Yixun Lan <dlan@kernel.org>
| -rw-r--r-- | arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts b/arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts index b61f5995ec77..c76b91ecb914 100644 --- a/arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts +++ b/arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts @@ -211,14 +211,14 @@ 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; }; |