[PATCH 0/6] riscv: dts: spacemit: fix maximum CPU core voltage for K1 boards

[PATCH 0/6] riscv: dts: spacemit: fix maximum CPU core voltage for K1 boards

[Aurelien Jarno]

The SpacemiT K1 based boards use the SpacemiT P1 PMIC. The buck1 and
buck2 voltage regulators supply the CPU core voltage. They 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.

This patch series set the maximum regulator voltage to 1.050V instead.
There is one patch per board in order to ease backporting to older
kernel versions.

Aurelien Jarno (6):
  riscv: dts: spacemit: k1-bananapi-f3: fix maximum CPU core voltage
  riscv: dts: spacemit: k1-milkv-jupiter: fix maximum CPU core voltage
  riscv: dts: spacemit: k1-orangepi-rv2: fix maximum CPU core voltage
  riscv: dts: spacemit: k1-musepi-pro: fix maximum CPU core voltage
  riscv: dts: spacemit: k1-orangepi-r2s: fix maximum CPU core voltage
  riscv: dts: spacemit: k1-bananapi-cm6: fix maximum CPU core voltage

 arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi | 4 ++--
 arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts   | 4 ++--
 arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts | 4 ++--
 arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts    | 4 ++--
 arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts  | 4 ++--
 arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts  | 4 ++--
 6 files changed, 12 insertions(+), 12 deletions(-)

-- 
2.53.0

[PATCH 1/6] riscv: dts: spacemit: k1-bananapi-f3: fix maximum CPU core voltage

[Aurelien Jarno]

On the Banana Pi BPI-F3 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: 09a412d39748 ("riscv: dts: spacemit: define regulator constraints")
Link: https://sashiko.dev/#/message/20260728211020.1248676-2-aurelien%40aurel32.net
Cc: stable@vger.kernel.org
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---
 arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
index e2961b7e0a3eb..58035d886bf67 100644
--- a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
@@ -237,14 +237,14 @@ pmic@41 {
 		regulators {
 			buck1_0v9: 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

[PATCH 2/6] riscv: dts: spacemit: k1-milkv-jupiter: fix maximum CPU core voltage

[Aurelien Jarno]

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>
---
 arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts | 4 ++--
 1 file 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 b61f5995ec771..c76b91ecb914d 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 @@ 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;
 			};
-- 
2.53.0

[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@vger.kernel.org
Signed-off-by: Aurelien Jarno <aurelien@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@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

[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@vger.kernel.org
Signed-off-by: Aurelien Jarno <aurelien@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@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

[PATCH 5/6] riscv: dts: spacemit: k1-orangepi-r2s: fix maximum CPU core voltage

[Aurelien Jarno]

On the OrangePi R2S 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: 793cc54475b4 ("riscv: dts: spacemit: enable PMIC on OrangePi R2S")
Link: https://sashiko.dev/#/message/20260728211020.1248676-2-aurelien%40aurel32.net
Cc: stable@vger.kernel.org
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---
 arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts b/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts
index 24591f7c3d236..2d1ba34cb00e2 100644
--- a/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts
@@ -134,14 +134,14 @@ 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;
 			};
-- 
2.53.0

[PATCH 6/6] riscv: dts: spacemit: k1-bananapi-cm6: fix maximum CPU core voltage

[Aurelien Jarno]

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: 46a8c01700ac ("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>
---
 arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi b/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi
index bf502c87040a3..81c40df2a3663 100644
--- a/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi
@@ -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;
 			};
-- 
2.53.0

Re: [PATCH 0/6] riscv: dts: spacemit: fix maximum CPU core voltage for K1 boards

[Yixun Lan]

On 17:02 Wed 29 Jul     , Aurelien Jarno wrote:
> The SpacemiT K1 based boards use the SpacemiT P1 PMIC. The buck1 and
> buck2 voltage regulators supply the CPU core voltage. They 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.
> 
> This patch series set the maximum regulator voltage to 1.050V instead.
> There is one patch per board in order to ease backporting to older
> kernel versions.
> 
> Aurelien Jarno (6):
>   riscv: dts: spacemit: k1-bananapi-f3: fix maximum CPU core voltage
>   riscv: dts: spacemit: k1-milkv-jupiter: fix maximum CPU core voltage
>   riscv: dts: spacemit: k1-orangepi-rv2: fix maximum CPU core voltage
>   riscv: dts: spacemit: k1-musepi-pro: fix maximum CPU core voltage
>   riscv: dts: spacemit: k1-orangepi-r2s: fix maximum CPU core voltage
>   riscv: dts: spacemit: k1-bananapi-cm6: fix maximum CPU core voltage
> 
>  arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi | 4 ++--
>  arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts   | 4 ++--
>  arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts | 4 ++--
>  arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts    | 4 ++--
>  arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts  | 4 ++--
>  arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts  | 4 ++--
>  6 files changed, 12 insertions(+), 12 deletions(-)
> 

Reviewed-by: Yixun Lan <dlan@kernel.org>

-- 
Yixun Lan (dlan)