[PATCH v2 1/6] riscv: dts: spacemit: k1-musepi-pro: add PMIC and power infrastructure

[PATCH v2 1/6] riscv: dts: spacemit: k1-musepi-pro: add PMIC and power infrastructure

[Andre Heider]

Enable i2c8 and add the connected SpacemiT P1 PMIC with its related regulators
for the board's power infrastructure and voltage regulation support.

Signed-off-by: Andre Heider <a.heider@gmail.com>
---
 .../riscv/boot/dts/spacemit/k1-musepi-pro.dts | 144 ++++++++++++++++++
 1 file changed, 144 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
index 29e333b670cf0..88c35ad1ef2ae 100644
--- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
@@ -17,6 +17,7 @@ / {
 	aliases {
 		ethernet0 = &eth0;
 		serial0 = &uart0;
+		i2c8 = &i2c8;
 	};
 
 	chosen {
@@ -33,6 +34,25 @@ led1 {
 			default-state = "on";
 		};
 	};
+
+	reg_usb_vbus: regulator-usb-vbus {
+		compatible = "regulator-fixed";
+		regulator-name = "USBVBUS";
+		regulator-min-microvolt = <12000000>;
+		regulator-max-microvolt = <12000000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	reg_vcc_4v0: regulator-vcc-40v {
+		compatible = "regulator-fixed";
+		regulator-name = "VCC4V0";
+		regulator-min-microvolt = <4000000>;
+		regulator-max-microvolt = <4000000>;
+		regulator-boot-on;
+		regulator-always-on;
+		vin-supply = <&reg_usb_vbus>;
+	};
 };
 
 &emmc {
@@ -72,6 +92,130 @@ &pdma {
 	status = "okay";
 };
 
+&i2c8 {
+	pinctrl-0 = <&i2c8_cfg>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	pmic@41 {
+		compatible = "spacemit,p1";
+		reg = <0x41>;
+		interrupts = <64>;
+		vin1-supply = <&reg_vcc_4v0>;
+		vin2-supply = <&reg_vcc_4v0>;
+		vin3-supply = <&reg_vcc_4v0>;
+		vin4-supply = <&reg_vcc_4v0>;
+		vin5-supply = <&reg_vcc_4v0>;
+		vin6-supply = <&reg_vcc_4v0>;
+		aldoin-supply = <&reg_vcc_4v0>;
+		dldoin1-supply = <&buck5>;
+		dldoin2-supply = <&buck5>;
+
+		regulators {
+			buck1 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <3450000>;
+				regulator-ramp-delay = <5000>;
+				regulator-always-on;
+			};
+
+			buck2 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <3450000>;
+				regulator-ramp-delay = <5000>;
+				regulator-always-on;
+			};
+
+			buck3 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-ramp-delay = <5000>;
+				regulator-always-on;
+			};
+
+			buck4 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-ramp-delay = <5000>;
+				regulator-always-on;
+			};
+
+			buck5: buck5 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <3450000>;
+				regulator-ramp-delay = <5000>;
+				regulator-always-on;
+			};
+
+			buck6 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <3450000>;
+				regulator-ramp-delay = <5000>;
+				regulator-always-on;
+			};
+
+			aldo1 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <3400000>;
+				regulator-boot-on;
+			};
+
+			aldo2 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <3400000>;
+			};
+
+			aldo3 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <3400000>;
+			};
+
+			aldo4 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <3400000>;
+			};
+
+			dldo1 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <3400000>;
+				regulator-boot-on;
+			};
+
+			dldo2 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <3400000>;
+			};
+
+			dldo3 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <3400000>;
+			};
+
+			dldo4 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <3400000>;
+				regulator-always-on;
+			};
+
+			dldo5 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <3400000>;
+			};
+
+			dldo6 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <3400000>;
+				regulator-always-on;
+			};
+
+			dldo7 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <3400000>;
+			};
+		};
+	};
+};
+
 &uart0 {
 	pinctrl-0 = <&uart0_2_cfg>;
 	pinctrl-names = "default";
-- 
2.53.0

[PATCH v2 2/6] riscv: dts: spacemit: k1-musepi-pro: add 24c04 eeprom

[Andre Heider]

Enable i2c2 and add the connected 24c04 EEPROM.

It contains an ONIE TLV table:
=> tlv_eeprom
TLV: 0
[  12.162] TlvInfo Header:
[  12.162]    Id String:    TlvInfo
[  12.165]    Version:      1
[  12.168]    Total Length: 58
[  12.171] TLV Name             Code Len Value
[  12.175] -------------------- ---- --- -----
[  12.179] Product Name         0x21  16 k1-x_MUSE-Pi-Pro
[  12.184] Serial Number        0x23  17 BPMIMXXXXXXXXXXXX
[  12.189] Unknown              0x41   1  0x02
[  12.194] Base MAC Address     0x24   6 FE:FE:FE:XX:XX:XX
[  12.199] MAC Addresses        0x2A   2 2
[  12.203] CRC-32               0xFE   4 0x395ECD34
[  12.207] Checksum is valid.

(With 0x41 as TLV_CODE_DDR_CSNUM)

Signed-off-by: Andre Heider <a.heider@gmail.com>
---
 .../riscv/boot/dts/spacemit/k1-musepi-pro.dts | 35 ++++++++++++++++++-
 1 file changed, 34 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
index 88c35ad1ef2ae..79415d760f162 100644
--- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
@@ -17,6 +17,7 @@ / {
 	aliases {
 		ethernet0 = &eth0;
 		serial0 = &uart0;
+		i2c2 = &i2c2;
 		i2c8 = &i2c8;
 	};
 
@@ -92,6 +93,38 @@ &pdma {
 	status = "okay";
 };
 
+&i2c2 {
+	pinctrl-0 = <&i2c2_0_cfg>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	eeprom@50 {
+		compatible = "atmel,24c02";
+		reg = <0x50>;
+		vcc-supply = <&buck3_1v8>; /* EEPROM_VCC1V8 */
+		pagesize = <8>;
+		read-only;
+		size = <256>;
+
+		nvmem-layout {
+			compatible = "onie,tlv-layout";
+
+			product-name {
+			};
+
+			serial-number {
+			};
+
+			mac-address {
+				#nvmem-cell-cells = <1>;
+			};
+
+			num-macs {
+			};
+		};
+	};
+};
+
 &i2c8 {
 	pinctrl-0 = <&i2c8_cfg>;
 	pinctrl-names = "default";
@@ -126,7 +159,7 @@ buck2 {
 				regulator-always-on;
 			};
 
-			buck3 {
+			buck3_1v8: buck3 {
 				regulator-min-microvolt = <500000>;
 				regulator-max-microvolt = <1800000>;
 				regulator-ramp-delay = <5000>;
-- 
2.53.0

[PATCH v2 3/6] riscv: dts: spacemit: k1-musepi-pro: enable QSPI and add SPI NOR

[Andre Heider]

Add the QSPI controller node and describe the attached SPI NOR flash
(Winbond W25Q64FWSSAQ).

Add a corresponding vendor flash partition layout.

Signed-off-by: Andre Heider <a.heider@gmail.com>
---
 .../riscv/boot/dts/spacemit/k1-musepi-pro.dts | 43 ++++++++++++++++++-
 1 file changed, 42 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
index 79415d760f162..7ebace0e46edb 100644
--- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
@@ -166,7 +166,7 @@ buck3_1v8: buck3 {
 				regulator-always-on;
 			};
 
-			buck4 {
+			buck4_3v3: buck4 {
 				regulator-min-microvolt = <500000>;
 				regulator-max-microvolt = <3300000>;
 				regulator-ramp-delay = <5000>;
@@ -249,6 +249,47 @@ dldo7 {
 	};
 };
 
+&qspi {
+	pinctrl-names = "default";
+	pinctrl-0 = <&qspi_cfg>;
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <26500000>;
+		spi-rx-bus-width = <4>;
+		spi-tx-bus-width = <4>;
+		vcc-supply = <&buck4_3v3>; /* QSPI_VCC1833 */
+		m25p,fast-read;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			bootinfo@0 {
+				reg = <0x0 0x10000>;
+			};
+			private@10000 {
+				reg = <0x10000 0x10000>;
+			};
+			fsbl@20000 {
+				reg = <0x20000 0x40000>;
+			};
+			env@60000 {
+				reg = <0x60000 0x10000>;
+			};
+			opensbi@70000 {
+				reg = <0x70000 0x30000>;
+			};
+			uboot@a00000 {
+				reg = <0xa0000 0x760000>;
+			};
+		};
+	};
+};
+
 &uart0 {
 	pinctrl-0 = <&uart0_2_cfg>;
 	pinctrl-names = "default";
-- 
2.53.0

[PATCH v2 4/6] riscv: dts: spacemit: k1-musepi-pro: enable USB 3 ports

[Andre Heider]

Enable the DWC3 USB 3.0 controller, its associated combo_phy (USB 3 PHY)
and usbphy2 (USB 2 PHY) on the MusePi Pro board.

The board uses a VLI VL817 hub, providing four ports.

Signed-off-by: Andre Heider <a.heider@gmail.com>
---
 .../riscv/boot/dts/spacemit/k1-musepi-pro.dts | 54 +++++++++++++++++++
 1 file changed, 54 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
index 7ebace0e46edb..9c90c2817ecb7 100644
--- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
@@ -54,6 +54,28 @@ reg_vcc_4v0: regulator-vcc-40v {
 		regulator-always-on;
 		vin-supply = <&reg_usb_vbus>;
 	};
+
+	reg_5v_vbus: regulator-5v-vbus {
+		compatible = "regulator-fixed";
+		regulator-name = "5V_VBUS";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
+		vin-supply = <&reg_usb_vbus>;
+		gpio = <&gpio K1_GPIO(79) GPIO_ACTIVE_HIGH>; /* USB3_PWREN */
+		enable-active-high;
+	};
+
+	reg_vcc5v_hub: regulator-vcc5v-hub {
+		compatible = "regulator-fixed";
+		regulator-name = "VCC5V0_HUB";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
+		vin-supply = <&reg_usb_vbus>;
+		gpio = <&gpio K1_GPIO(127) GPIO_ACTIVE_HIGH>; /* HUB_PWREN */
+		enable-active-high;
+	};
 };
 
 &emmc {
@@ -66,6 +88,10 @@ &emmc {
 	status = "okay";
 };
 
+&combo_phy {
+	status = "okay";
+};
+
 &eth0 {
 	phy-handle = <&rgmii0>;
 	phy-mode = "rgmii-id";
@@ -295,3 +321,31 @@ &uart0 {
 	pinctrl-names = "default";
 	status = "okay";
 };
+
+&usbphy2 {
+	status = "okay";
+};
+
+&usb_dwc3 {
+	dr_mode = "host";
+	#address-cells = <1>;
+	#size-cells = <0>;
+	vbus-supply = <&reg_5v_vbus>;
+	status = "okay";
+
+	hub_2_0: hub@1 {
+		compatible = "usb2109,2817";
+		reg = <0x1>;
+		vdd-supply = <&reg_vcc5v_hub>;
+		peer-hub = <&hub_3_0>;
+		reset-gpios = <&gpio K1_GPIO(123) GPIO_ACTIVE_LOW>; /* HUB_RST */
+	};
+
+	hub_3_0: hub@2 {
+		compatible = "usb2109,817";
+		reg = <0x2>;
+		vdd-supply = <&reg_vcc5v_hub>;
+		peer-hub = <&hub_2_0>;
+		reset-gpios = <&gpio K1_GPIO(123) GPIO_ACTIVE_LOW>; /* HUB_RST */
+	};
+};
-- 
2.53.0

[PATCH v2 5/6] riscv: dts: spacemit: k1-musepi-pro: enable PCIe ports

[Andre Heider]

Enable the two PCIe controller along with and their associated PHYs. They
are routed to the M.2 M-key connector and to the PCIe slot.

Signed-off-by: Andre Heider <a.heider@gmail.com>
---
 .../riscv/boot/dts/spacemit/k1-musepi-pro.dts | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
index 9c90c2817ecb7..2d3e30f0bd806 100644
--- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
@@ -36,6 +36,24 @@ led1 {
 		};
 	};
 
+	pcie_vcc_3v3: regulator-pcie-vcc3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "PCIE_VCC3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+		vin-supply = <&reg_usb_vbus>;
+	};
+
+	mpcie_vcc_3v3: regulator-mpcie-vcc3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "MPCIE_VCC3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+		vin-supply = <&reg_usb_vbus>;
+	};
+
 	reg_usb_vbus: regulator-usb-vbus {
 		compatible = "regulator-fixed";
 		regulator-name = "USBVBUS";
@@ -275,6 +293,38 @@ dldo7 {
 	};
 };
 
+&pcie1_phy {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pcie1_3_cfg>;
+	status = "okay";
+};
+
+&pcie1_port {
+	phys = <&pcie1_phy>;
+	vpcie3v3-supply = <&pcie_vcc_3v3>;
+};
+
+&pcie1 {
+	vpcie3v3-supply = <&pcie_vcc_3v3>;
+	status = "okay";
+};
+
+&pcie2_phy {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pcie2_4_cfg>;
+	status = "okay";
+};
+
+&pcie2_port {
+	phys = <&pcie2_phy>;
+	vpcie3v3-supply = <&mpcie_vcc_3v3>;
+};
+
+&pcie2 {
+	vpcie3v3-supply = <&mpcie_vcc_3v3>;
+	status = "okay";
+};
+
 &qspi {
 	pinctrl-names = "default";
 	pinctrl-0 = <&qspi_cfg>;
-- 
2.53.0

[PATCH v2 6/6] riscv: dts: spacemit: k1-musepi-pro: set default console baud rate

[Andre Heider]

Allow serial output with the same uboot/opensbi settings so the
console works without providing a cmdline.

Signed-off-by: Andre Heider <a.heider@gmail.com>
---
 arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
index 2d3e30f0bd806..c8bf776511c94 100644
--- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
@@ -22,7 +22,7 @@ aliases {
 	};
 
 	chosen {
-		stdout-path = "serial0";
+		stdout-path = "serial0:115200n8";
 	};
 
 	leds {
-- 
2.53.0

Re: [PATCH v2 1/6] riscv: dts: spacemit: k1-musepi-pro: add PMIC and power infrastructure

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Low] The node name `regulator-vcc-40v` incorrectly implies a 40V regulator, whereas it is configured for 4.0V.
--

commit 31559fd8aa980bcda8336aa1515122f80207c34b
Author: Andre Heider <a.heider@gmail.com>

riscv: dts: spacemit: k1-musepi-pro: add PMIC and power infrastructure

This commit enables i2c8 and adds the connected SpacemiT P1 PMIC with
its related regulators for the board's power infrastructure.

> diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> --- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> +++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts

[ ... ]

> +	reg_vcc_4v0: regulator-vcc-40v {

This isn't a bug, but there appears to be a typo in the node name. The 40v
suffix implies a 40V regulator, whereas the regulator properties configure
it for 4.0V. Should this be named regulator-vcc-4v0 or similar to match the
label and configuration?

> +		compatible = "regulator-fixed";
> +		regulator-name = "VCC4V0";
> +		regulator-min-microvolt = <4000000>;
> +		regulator-max-microvolt = <4000000>;
> +		regulator-boot-on;
> +		regulator-always-on;
> +		vin-supply = <&reg_usb_vbus>;
> +	};

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260511111116.1109643-1-a.heider@gmail.com?part=1

Re: [PATCH v2 2/6] riscv: dts: spacemit: k1-musepi-pro: add 24c04 eeprom

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Medium] Mismatch between commit message specifying 24C04 EEPROM and the device tree implementation specifying 24C02.
--

commit 8474b79f5a61bfe2629e2e2bdbab9bc9128b8502
Author: Andre Heider <a.heider@gmail.com>

riscv: dts: spacemit: k1-musepi-pro: add 24c04 eeprom

This commit enables i2c2 and adds a connected EEPROM containing an ONIE
TLV table.

> diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> index 88c35ad1ef2ae..79415d760f162 100644
> --- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> +++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
[ ... ]
> @@ -92,6 +93,38 @@ &pdma {
>  	status = "okay";
>  };
>  
> +&i2c2 {
> +	pinctrl-0 = <&i2c2_0_cfg>;
> +	pinctrl-names = "default";
> +	status = "okay";
> +
> +	eeprom@50 {
> +		compatible = "atmel,24c02";
> +		reg = <0x50>;
> +		vcc-supply = <&buck3_1v8>; /* EEPROM_VCC1V8 */
> +		pagesize = <8>;
> +		read-only;
> +		size = <256>;

The commit message states "add 24c04 eeprom", but the device tree uses the
atmel,24c02 compatible string, a page size of 8, and a total size of 256
bytes.

Since a 24c04 EEPROM is typically 512 bytes with a 16-byte page size, is
this hardware actually a 24c02, or does the device tree node need to be
updated to fully describe a 24c04?

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260511111116.1109643-1-a.heider@gmail.com?part=2

Re: [PATCH v2 3/6] riscv: dts: spacemit: k1-musepi-pro: enable QSPI and add SPI NOR

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 2 potential issue(s) to consider:
- [High] Potential overvoltage risk for the W25Q64FW SPI NOR flash via the 'buck4_3v3' supply.
- [Low] The unit-address in the 'uboot' partition node name does not match the base address in its 'reg' property.
--

commit 470f9c74bd3cfec41ed69dd8c4e22535a7e8164f
Author: Andre Heider <a.heider@gmail.com>

riscv: dts: spacemit: k1-musepi-pro: enable QSPI and add SPI NOR

This commit adds the QSPI controller node and describes the attached
SPI NOR flash. It also provides a corresponding vendor flash partition
layout.

> diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> --- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> +++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts

[ ... ]

> @@ -166,7 +166,7 @@ buck3_1v8: buck3 {
>  				regulator-always-on;
>  			};
>  
> -			buck4 {
> +			buck4_3v3: buck4 {
>  				regulator-min-microvolt = <500000>;
>  				regulator-max-microvolt = <3300000>;
>  				regulator-ramp-delay = <5000>;

[ ... ]

> @@ -249,6 +249,47 @@ dldo7 {
>  	};
>  };
>  
> +&qspi {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&qspi_cfg>;
> +	status = "okay";
> +
> +	flash@0 {
> +		compatible = "jedec,spi-nor";
> +		reg = <0>;
> +		spi-max-frequency = <26500000>;
> +		spi-rx-bus-width = <4>;
> +		spi-tx-bus-width = <4>;
> +		vcc-supply = <&buck4_3v3>; /* QSPI_VCC1833 */

The commit message notes this flash is a Winbond W25Q64FWSSAQ, which is a
strict 1.8V part. Could this vcc-supply assignment cause hardware damage?

The buck4 regulator has a maximum voltage of 3.3V. If the regulator defaults
to 3.3V or is configured to 3.3V dynamically, it exceeds the absolute maximum
ratings for the 1.8V W25Q series flash.

Is the board actually using the 3V equivalent (W25Q64JV), or does the
regulator need stricter constraints if it exclusively powers this flash?

> +		m25p,fast-read;
> +
> +		partitions {
> +			compatible = "fixed-partitions";
> +			#address-cells = <1>;
> +			#size-cells = <1>;

[ ... ]

> +			opensbi@70000 {
> +				reg = <0x70000 0x30000>;
> +			};
> +			uboot@a00000 {
> +				reg = <0xa0000 0x760000>;

This isn't a regression, but there is a mismatch between the unit-address in
the node name and the base address in the reg property.

Should the node be named uboot@a0000 to match the 0xa0000 address and prevent
a compiler warning?

> +			};
> +		};
> +	};
> +};

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260511111116.1109643-1-a.heider@gmail.com?part=3

Re: [PATCH v2 5/6] riscv: dts: spacemit: k1-musepi-pro: enable PCIe ports

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 2 potential issue(s) to consider:
- [Medium] The `vpcie3v3-supply` property is incorrectly assigned to the top-level PCIe host controller nodes (`&pcie1` and `&pcie2`), which will cause a `dtbs_check` schema validation failure.
- [Low] Grammar and phrasing errors in the commit message.
--

commit 2a8e8221b4fb4ddc072a4a8a753e3e9b7e8f1d06
Author: Andre Heider <a.heider@gmail.com>

riscv: dts: spacemit: k1-musepi-pro: enable PCIe ports

This commit enables the two PCIe controllers and their PHYs for the
SpacemiT K1 MusePI Pro board. The PCIe ports are routed to the M.2 M-key
connector and the PCIe slot, and fixed regulators are provided for the
3.3V supplies.

> Enable the two PCIe controller along with and their associated PHYs. They
> are routed to the M.2 M-key connector and to the PCIe slot.

This isn't a bug, but there's a typo in the commit message. The word
"controller" should be plural, and there is an extra "and" after "with".

> diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> index 9c90c2817ecb7..2d3e30f0bd806 100644
> --- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> +++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts

[ ... ]

> +&pcie1_phy {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pcie1_3_cfg>;
> +	status = "okay";
> +};
> +
> +&pcie1_port {
> +	phys = <&pcie1_phy>;
> +	vpcie3v3-supply = <&pcie_vcc_3v3>;
> +};
> +
> +&pcie1 {
> +	vpcie3v3-supply = <&pcie_vcc_3v3>;

Does this cause a dtbs_check schema validation failure?

According to the SpacemiT PCIe device tree binding schema, the
vpcie3v3-supply property is strictly defined under the patternProperties
for the child PCI bridge node. The top-level host controller node
specifies unevaluatedProperties: false and does not define vpcie3v3-supply.

> +	status = "okay";
> +};
> +
> +&pcie2_phy {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pcie2_4_cfg>;
> +	status = "okay";
> +};
> +
> +&pcie2_port {
> +	phys = <&pcie2_phy>;
> +	vpcie3v3-supply = <&mpcie_vcc_3v3>;
> +};
> +
> +&pcie2 {
> +	vpcie3v3-supply = <&mpcie_vcc_3v3>;

Is this redundancy added to work around an existing issue in the SpacemiT
K1 PCIe driver?

The driver currently fetches the regulator from the root controller device
instead of the port node, but duplicating the property in the device tree
violates the bindings.

Should the driver be updated to parse the child node instead of duplicating
the property here in the root nodes?

> +	status = "okay";
> +};

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260511111116.1109643-1-a.heider@gmail.com?part=5

Re: [PATCH v2 3/6] riscv: dts: spacemit: k1-musepi-pro: enable QSPI and add SPI NOR

[Andre Heider]

On 12.05.26 4:28 AM, sashiko-bot@kernel.org wrote:
> Thank you for your contribution! Sashiko AI review found 2 potential issue(s) to consider:
> - [High] Potential overvoltage risk for the W25Q64FW SPI NOR flash via the 'buck4_3v3' supply.
> - [Low] The unit-address in the 'uboot' partition node name does not match the base address in its 'reg' property.
> --
> 
> commit 470f9c74bd3cfec41ed69dd8c4e22535a7e8164f
> Author: Andre Heider <a.heider@gmail.com>
> 
> riscv: dts: spacemit: k1-musepi-pro: enable QSPI and add SPI NOR
> 
> This commit adds the QSPI controller node and describes the attached
> SPI NOR flash. It also provides a corresponding vendor flash partition
> layout.
> 
>> diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
>> --- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
>> +++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> 
> [ ... ]
> 
>> @@ -166,7 +166,7 @@ buck3_1v8: buck3 {
>>   				regulator-always-on;
>>   			};
>>   
>> -			buck4 {
>> +			buck4_3v3: buck4 {
>>   				regulator-min-microvolt = <500000>;
>>   				regulator-max-microvolt = <3300000>;
>>   				regulator-ramp-delay = <5000>;
> 
> [ ... ]
> 
>> @@ -249,6 +249,47 @@ dldo7 {
>>   	};
>>   };
>>   
>> +&qspi {
>> +	pinctrl-names = "default";
>> +	pinctrl-0 = <&qspi_cfg>;
>> +	status = "okay";
>> +
>> +	flash@0 {
>> +		compatible = "jedec,spi-nor";
>> +		reg = <0>;
>> +		spi-max-frequency = <26500000>;
>> +		spi-rx-bus-width = <4>;
>> +		spi-tx-bus-width = <4>;
>> +		vcc-supply = <&buck4_3v3>; /* QSPI_VCC1833 */
> 
> The commit message notes this flash is a Winbond W25Q64FWSSAQ, which is a
> strict 1.8V part. Could this vcc-supply assignment cause hardware damage?
> 
> The buck4 regulator has a maximum voltage of 3.3V. If the regulator defaults
> to 3.3V or is configured to 3.3V dynamically, it exceeds the absolute maximum
> ratings for the 1.8V W25Q series flash.

As per the comment, there's a the non controllable regulator QSPI_VCC1833 in between.
k1-milkv-jupiter.dts matches in this regard.
I'll keep it unchanged unless someone has an idea how to express that in a better way.

> 
> Is the board actually using the 3V equivalent (W25Q64JV), or does the
> regulator need stricter constraints if it exclusively powers this flash?
> 
>> +		m25p,fast-read;
>> +
>> +		partitions {
>> +			compatible = "fixed-partitions";
>> +			#address-cells = <1>;
>> +			#size-cells = <1>;
> 
> [ ... ]
> 
>> +			opensbi@70000 {
>> +				reg = <0x70000 0x30000>;
>> +			};
>> +			uboot@a00000 {
>> +				reg = <0xa0000 0x760000>;
> 
> This isn't a regression, but there is a mismatch between the unit-address in
> the node name and the base address in the reg property.
> 
> Should the node be named uboot@a0000 to match the 0xa0000 address and prevent
> a compiler warning?
> 
>> +			};
>> +		};
>> +	};
>> +};
> 

Re: [PATCH v2 5/6] riscv: dts: spacemit: k1-musepi-pro: enable PCIe ports

[Yixun Lan]

Hi Andre,

On 13:11 Mon 11 May     , Andre Heider wrote:
> Enable the two PCIe controller along with and their associated PHYs. They
> are routed to the M.2 M-key connector and to the PCIe slot.
> 
> Signed-off-by: Andre Heider <a.heider@gmail.com>
> ---
>  .../riscv/boot/dts/spacemit/k1-musepi-pro.dts | 50 +++++++++++++++++++
>  1 file changed, 50 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> index 9c90c2817ecb7..2d3e30f0bd806 100644
> --- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> +++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> @@ -36,6 +36,24 @@ led1 {
>  		};
>  	};
>  
> +	pcie_vcc_3v3: regulator-pcie-vcc3v3 {
> +		compatible = "regulator-fixed";
> +		regulator-name = "PCIE_VCC3V3";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-always-on;
> +		vin-supply = <&reg_usb_vbus>;
> +	};
> +
> +	mpcie_vcc_3v3: regulator-mpcie-vcc3v3 {
> +		compatible = "regulator-fixed";
> +		regulator-name = "MPCIE_VCC3V3";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-always-on;
> +		vin-supply = <&reg_usb_vbus>;
> +	};
> +
>  	reg_usb_vbus: regulator-usb-vbus {
>  		compatible = "regulator-fixed";
>  		regulator-name = "USBVBUS";
> @@ -275,6 +293,38 @@ dldo7 {
>  	};
>  };
>  
> +&pcie1_phy {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pcie1_3_cfg>;
> +	status = "okay";
> +};
> +
> +&pcie1_port {
> +	phys = <&pcie1_phy>;
> +	vpcie3v3-supply = <&pcie_vcc_3v3>;
> +};
> +
> +&pcie1 {
..
> +	vpcie3v3-supply = <&pcie_vcc_3v3>;
drop vpcie3v3-supply which not needed

> +	status = "okay";
> +};
> +
> +&pcie2_phy {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pcie2_4_cfg>;
> +	status = "okay";
> +};
> +
> +&pcie2_port {
> +	phys = <&pcie2_phy>;
> +	vpcie3v3-supply = <&mpcie_vcc_3v3>;
> +};
> +
> +&pcie2 {
> +	vpcie3v3-supply = <&mpcie_vcc_3v3>;
same here
> +	status = "okay";
> +};
> +
>  &qspi {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&qspi_cfg>;
> -- 
> 2.53.0
> 

-- 
Yixun Lan (dlan)

Re: [PATCH v2 6/6] riscv: dts: spacemit: k1-musepi-pro: set default console baud rate

[Yixun Lan]

On 13:11 Mon 11 May     , Andre Heider wrote:
> Allow serial output with the same uboot/opensbi settings so the
> console works without providing a cmdline.
> 
> Signed-off-by: Andre Heider <a.heider@gmail.com>

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

> ---
>  arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> index 2d3e30f0bd806..c8bf776511c94 100644
> --- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> +++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> @@ -22,7 +22,7 @@ aliases {
>  	};
>  
>  	chosen {
> -		stdout-path = "serial0";
> +		stdout-path = "serial0:115200n8";
>  	};
>  
>  	leds {
> -- 
> 2.53.0
> 

-- 
Yixun Lan (dlan)

Re: [PATCH v2 1/6] riscv: dts: spacemit: k1-musepi-pro: add PMIC and power infrastructure

[Yixun Lan]

Hi Andre,

On 13:11 Mon 11 May     , Andre Heider wrote:
> Enable i2c8 and add the connected SpacemiT P1 PMIC with its related regulators
> for the board's power infrastructure and voltage regulation support.
> 
> Signed-off-by: Andre Heider <a.heider@gmail.com>
> ---
>  .../riscv/boot/dts/spacemit/k1-musepi-pro.dts | 144 ++++++++++++++++++
>  1 file changed, 144 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> index 29e333b670cf0..88c35ad1ef2ae 100644
> --- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> +++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> @@ -17,6 +17,7 @@ / {
>  	aliases {
>  		ethernet0 = &eth0;
>  		serial0 = &uart0;
> +		i2c8 = &i2c8;
>  	};
>  
>  	chosen {
> @@ -33,6 +34,25 @@ led1 {
>  			default-state = "on";
>  		};
>  	};
> +
..
> +	reg_usb_vbus: regulator-usb-vbus {
> +		compatible = "regulator-fixed";
> +		regulator-name = "USBVBUS";
> +		regulator-min-microvolt = <12000000>;
> +		regulator-max-microvolt = <12000000>;
> +		regulator-boot-on;
> +		regulator-always-on;
> +	};
I think you can further drop above regulator, which merely serve as vin-supply 
and not used by devices, plus it's a non-controllable fixed regulator

> +
> +	reg_vcc_4v0: regulator-vcc-40v {
> +		compatible = "regulator-fixed";
> +		regulator-name = "VCC4V0";
> +		regulator-min-microvolt = <4000000>;
> +		regulator-max-microvolt = <4000000>;
> +		regulator-boot-on;
> +		regulator-always-on;
> +		vin-supply = <&reg_usb_vbus>;
> +	};
>  };
>  
>  &emmc {
> @@ -72,6 +92,130 @@ &pdma {
>  	status = "okay";
>  };
>  
> +&i2c8 {
> +	pinctrl-0 = <&i2c8_cfg>;
> +	pinctrl-names = "default";
> +	status = "okay";
> +
> +	pmic@41 {
> +		compatible = "spacemit,p1";
> +		reg = <0x41>;
> +		interrupts = <64>;
> +		vin1-supply = <&reg_vcc_4v0>;
> +		vin2-supply = <&reg_vcc_4v0>;
> +		vin3-supply = <&reg_vcc_4v0>;
> +		vin4-supply = <&reg_vcc_4v0>;
> +		vin5-supply = <&reg_vcc_4v0>;
> +		vin6-supply = <&reg_vcc_4v0>;
> +		aldoin-supply = <&reg_vcc_4v0>;
> +		dldoin1-supply = <&buck5>;
> +		dldoin2-supply = <&buck5>;
> +
> +		regulators {
> +			buck1 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <3450000>;
> +				regulator-ramp-delay = <5000>;
> +				regulator-always-on;
> +			};
> +
> +			buck2 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <3450000>;
> +				regulator-ramp-delay = <5000>;
> +				regulator-always-on;
> +			};
> +
> +			buck3 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <1800000>;
> +				regulator-ramp-delay = <5000>;
> +				regulator-always-on;
> +			};
> +
> +			buck4 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <3300000>;
> +				regulator-ramp-delay = <5000>;
> +				regulator-always-on;
> +			};
> +
> +			buck5: buck5 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <3450000>;
> +				regulator-ramp-delay = <5000>;
> +				regulator-always-on;
> +			};
> +
> +			buck6 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <3450000>;
> +				regulator-ramp-delay = <5000>;
> +				regulator-always-on;
> +			};
> +
> +			aldo1 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <3400000>;
> +				regulator-boot-on;
> +			};
> +
> +			aldo2 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <3400000>;
> +			};
> +
> +			aldo3 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <3400000>;
> +			};
> +
> +			aldo4 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <3400000>;
> +			};
> +
> +			dldo1 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <3400000>;
> +				regulator-boot-on;
> +			};
> +
> +			dldo2 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <3400000>;
> +			};
> +
> +			dldo3 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <3400000>;
> +			};
> +
> +			dldo4 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <3400000>;
> +				regulator-always-on;
> +			};
> +
> +			dldo5 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <3400000>;
> +			};
> +
> +			dldo6 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <3400000>;
> +				regulator-always-on;
> +			};
> +
> +			dldo7 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <3400000>;
> +			};
> +		};
> +	};
> +};
> +
>  &uart0 {
>  	pinctrl-0 = <&uart0_2_cfg>;
>  	pinctrl-names = "default";
> -- 
> 2.53.0
> 
> 

-- 
Yixun Lan (dlan)

Re: [PATCH v2 3/6] riscv: dts: spacemit: k1-musepi-pro: enable QSPI and add SPI NOR

[Yixun Lan]

Hi Andre,

On 13:11 Mon 11 May     , Andre Heider wrote:
> Add the QSPI controller node and describe the attached SPI NOR flash
> (Winbond W25Q64FWSSAQ).
> 
> Add a corresponding vendor flash partition layout.
> 
> Signed-off-by: Andre Heider <a.heider@gmail.com>
> ---
>  .../riscv/boot/dts/spacemit/k1-musepi-pro.dts | 43 ++++++++++++++++++-
>  1 file changed, 42 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> index 79415d760f162..7ebace0e46edb 100644
> --- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> +++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> @@ -166,7 +166,7 @@ buck3_1v8: buck3 {
>  				regulator-always-on;
>  			};
>  
> -			buck4 {
> +			buck4_3v3: buck4 {
I'd prefer you make it right once in the first patch [1/6] which introduced this
regulator.. please fix all similar issues in this series..

>  				regulator-min-microvolt = <500000>;
>  				regulator-max-microvolt = <3300000>;
>  				regulator-ramp-delay = <5000>;
> @@ -249,6 +249,47 @@ dldo7 {
>  	};
>  };
>  
> +&qspi {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&qspi_cfg>;
> +	status = "okay";
> +
> +	flash@0 {
> +		compatible = "jedec,spi-nor";
> +		reg = <0>;
> +		spi-max-frequency = <26500000>;
> +		spi-rx-bus-width = <4>;
> +		spi-tx-bus-width = <4>;
> +		vcc-supply = <&buck4_3v3>; /* QSPI_VCC1833 */
> +		m25p,fast-read;
> +
> +		partitions {
> +			compatible = "fixed-partitions";
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +
> +			bootinfo@0 {
> +				reg = <0x0 0x10000>;
> +			};
> +			private@10000 {
> +				reg = <0x10000 0x10000>;
> +			};
> +			fsbl@20000 {
> +				reg = <0x20000 0x40000>;
> +			};
> +			env@60000 {
> +				reg = <0x60000 0x10000>;
> +			};
> +			opensbi@70000 {
> +				reg = <0x70000 0x30000>;
> +			};
> +			uboot@a00000 {
> +				reg = <0xa0000 0x760000>;
> +			};
> +		};
> +	};
> +};
> +
>  &uart0 {
>  	pinctrl-0 = <&uart0_2_cfg>;
>  	pinctrl-names = "default";
> -- 
> 2.53.0
> 

-- 
Yixun Lan (dlan)

Re: [PATCH v2 3/6] riscv: dts: spacemit: k1-musepi-pro: enable QSPI and add SPI NOR

[Rob Herring]

On Tue, May 12, 2026 at 1:51 AM Andre Heider <a.heider@gmail.com> wrote:
>
> On 12.05.26 4:28 AM, sashiko-bot@kernel.org wrote:
> > Thank you for your contribution! Sashiko AI review found 2 potential issue(s) to consider:
> > - [High] Potential overvoltage risk for the W25Q64FW SPI NOR flash via the 'buck4_3v3' supply.
> > - [Low] The unit-address in the 'uboot' partition node name does not match the base address in its 'reg' property.
> > --
> >
> > commit 470f9c74bd3cfec41ed69dd8c4e22535a7e8164f
> > Author: Andre Heider <a.heider@gmail.com>
> >
> > riscv: dts: spacemit: k1-musepi-pro: enable QSPI and add SPI NOR
> >
> > This commit adds the QSPI controller node and describes the attached
> > SPI NOR flash. It also provides a corresponding vendor flash partition
> > layout.
> >
> >> diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> >> --- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> >> +++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> >
> > [ ... ]
> >
> >> @@ -166,7 +166,7 @@ buck3_1v8: buck3 {
> >>                              regulator-always-on;
> >>                      };
> >>
> >> -                    buck4 {
> >> +                    buck4_3v3: buck4 {
> >>                              regulator-min-microvolt = <500000>;
> >>                              regulator-max-microvolt = <3300000>;
> >>                              regulator-ramp-delay = <5000>;
> >
> > [ ... ]
> >
> >> @@ -249,6 +249,47 @@ dldo7 {
> >>      };
> >>   };
> >>
> >> +&qspi {
> >> +    pinctrl-names = "default";
> >> +    pinctrl-0 = <&qspi_cfg>;
> >> +    status = "okay";
> >> +
> >> +    flash@0 {
> >> +            compatible = "jedec,spi-nor";
> >> +            reg = <0>;
> >> +            spi-max-frequency = <26500000>;
> >> +            spi-rx-bus-width = <4>;
> >> +            spi-tx-bus-width = <4>;
> >> +            vcc-supply = <&buck4_3v3>; /* QSPI_VCC1833 */
> >
> > The commit message notes this flash is a Winbond W25Q64FWSSAQ, which is a
> > strict 1.8V part. Could this vcc-supply assignment cause hardware damage?
> >
> > The buck4 regulator has a maximum voltage of 3.3V. If the regulator defaults
> > to 3.3V or is configured to 3.3V dynamically, it exceeds the absolute maximum
> > ratings for the 1.8V W25Q series flash.
>
> As per the comment, there's a the non controllable regulator QSPI_VCC1833 in between.
> k1-milkv-jupiter.dts matches in this regard.
> I'll keep it unchanged unless someone has an idea how to express that in a better way.

That's what we have fixed-regulator binding for. It can take an input supply.

Rob

Re: [PATCH v2 3/6] riscv: dts: spacemit: k1-musepi-pro: enable QSPI and add SPI NOR

[Andre Heider]

On 12.05.26 1:55 PM, Rob Herring wrote:
> On Tue, May 12, 2026 at 1:51 AM Andre Heider <a.heider@gmail.com> wrote:
>>
>> On 12.05.26 4:28 AM, sashiko-bot@kernel.org wrote:
>>> Thank you for your contribution! Sashiko AI review found 2 potential issue(s) to consider:
>>> - [High] Potential overvoltage risk for the W25Q64FW SPI NOR flash via the 'buck4_3v3' supply.
>>> - [Low] The unit-address in the 'uboot' partition node name does not match the base address in its 'reg' property.
>>> --
>>>
>>> commit 470f9c74bd3cfec41ed69dd8c4e22535a7e8164f
>>> Author: Andre Heider <a.heider@gmail.com>
>>>
>>> riscv: dts: spacemit: k1-musepi-pro: enable QSPI and add SPI NOR
>>>
>>> This commit adds the QSPI controller node and describes the attached
>>> SPI NOR flash. It also provides a corresponding vendor flash partition
>>> layout.
>>>
>>>> diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
>>>> --- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
>>>> +++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
>>>
>>> [ ... ]
>>>
>>>> @@ -166,7 +166,7 @@ buck3_1v8: buck3 {
>>>>                               regulator-always-on;
>>>>                       };
>>>>
>>>> -                    buck4 {
>>>> +                    buck4_3v3: buck4 {
>>>>                               regulator-min-microvolt = <500000>;
>>>>                               regulator-max-microvolt = <3300000>;
>>>>                               regulator-ramp-delay = <5000>;
>>>
>>> [ ... ]
>>>
>>>> @@ -249,6 +249,47 @@ dldo7 {
>>>>       };
>>>>    };
>>>>
>>>> +&qspi {
>>>> +    pinctrl-names = "default";
>>>> +    pinctrl-0 = <&qspi_cfg>;
>>>> +    status = "okay";
>>>> +
>>>> +    flash@0 {
>>>> +            compatible = "jedec,spi-nor";
>>>> +            reg = <0>;
>>>> +            spi-max-frequency = <26500000>;
>>>> +            spi-rx-bus-width = <4>;
>>>> +            spi-tx-bus-width = <4>;
>>>> +            vcc-supply = <&buck4_3v3>; /* QSPI_VCC1833 */
>>>
>>> The commit message notes this flash is a Winbond W25Q64FWSSAQ, which is a
>>> strict 1.8V part. Could this vcc-supply assignment cause hardware damage?
>>>
>>> The buck4 regulator has a maximum voltage of 3.3V. If the regulator defaults
>>> to 3.3V or is configured to 3.3V dynamically, it exceeds the absolute maximum
>>> ratings for the 1.8V W25Q series flash.
>>
>> As per the comment, there's a the non controllable regulator QSPI_VCC1833 in between.
>> k1-milkv-jupiter.dts matches in this regard.
>> I'll keep it unchanged unless someone has an idea how to express that in a better way.
> 
> That's what we have fixed-regulator binding for. It can take an input supply.

Yeah, I was just trying to avoid the "non controllable" comment with a request to get rid of it ;)
But I guess if I have a consumer that's fine.

Note that dtbs_check passes, AFAICT sashiko is the only instance noticing it.

Thanks,
Andre

Re: [PATCH v2 1/6] riscv: dts: spacemit: k1-musepi-pro: add PMIC and power infrastructure

[Andre Heider]

On 12.05.26 1:39 PM, Yixun Lan wrote:
> Hi Andre,
> 
> On 13:11 Mon 11 May     , Andre Heider wrote:
>> Enable i2c8 and add the connected SpacemiT P1 PMIC with its related regulators
>> for the board's power infrastructure and voltage regulation support.
>>
>> Signed-off-by: Andre Heider <a.heider@gmail.com>
>> ---
>>   .../riscv/boot/dts/spacemit/k1-musepi-pro.dts | 144 ++++++++++++++++++
>>   1 file changed, 144 insertions(+)
>>
>> diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
>> index 29e333b670cf0..88c35ad1ef2ae 100644
>> --- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
>> +++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
>> @@ -17,6 +17,7 @@ / {
>>   	aliases {
>>   		ethernet0 = &eth0;
>>   		serial0 = &uart0;
>> +		i2c8 = &i2c8;
>>   	};
>>   
>>   	chosen {
>> @@ -33,6 +34,25 @@ led1 {
>>   			default-state = "on";
>>   		};
>>   	};
>> +
> ..
>> +	reg_usb_vbus: regulator-usb-vbus {
>> +		compatible = "regulator-fixed";
>> +		regulator-name = "USBVBUS";
>> +		regulator-min-microvolt = <12000000>;
>> +		regulator-max-microvolt = <12000000>;
>> +		regulator-boot-on;
>> +		regulator-always-on;
>> +	};
> I think you can further drop above regulator, which merely serve as vin-supply
> and not used by devices, plus it's a non-controllable fixed regulator

It is, but as mentioned on the cover letter I left this one as it's consistent with the other k1 boards.
I don't care either way, so I'll just drop it.

Thanks,
Andre

> 
>> +
>> +	reg_vcc_4v0: regulator-vcc-40v {
>> +		compatible = "regulator-fixed";
>> +		regulator-name = "VCC4V0";
>> +		regulator-min-microvolt = <4000000>;
>> +		regulator-max-microvolt = <4000000>;
>> +		regulator-boot-on;
>> +		regulator-always-on;
>> +		vin-supply = <&reg_usb_vbus>;
>> +	};
>>   };
>>   
>>   &emmc {
>> @@ -72,6 +92,130 @@ &pdma {
>>   	status = "okay";
>>   };
>>   
>> +&i2c8 {
>> +	pinctrl-0 = <&i2c8_cfg>;
>> +	pinctrl-names = "default";
>> +	status = "okay";
>> +
>> +	pmic@41 {
>> +		compatible = "spacemit,p1";
>> +		reg = <0x41>;
>> +		interrupts = <64>;
>> +		vin1-supply = <&reg_vcc_4v0>;
>> +		vin2-supply = <&reg_vcc_4v0>;
>> +		vin3-supply = <&reg_vcc_4v0>;
>> +		vin4-supply = <&reg_vcc_4v0>;
>> +		vin5-supply = <&reg_vcc_4v0>;
>> +		vin6-supply = <&reg_vcc_4v0>;
>> +		aldoin-supply = <&reg_vcc_4v0>;
>> +		dldoin1-supply = <&buck5>;
>> +		dldoin2-supply = <&buck5>;
>> +
>> +		regulators {
>> +			buck1 {
>> +				regulator-min-microvolt = <500000>;
>> +				regulator-max-microvolt = <3450000>;
>> +				regulator-ramp-delay = <5000>;
>> +				regulator-always-on;
>> +			};
>> +
>> +			buck2 {
>> +				regulator-min-microvolt = <500000>;
>> +				regulator-max-microvolt = <3450000>;
>> +				regulator-ramp-delay = <5000>;
>> +				regulator-always-on;
>> +			};
>> +
>> +			buck3 {
>> +				regulator-min-microvolt = <500000>;
>> +				regulator-max-microvolt = <1800000>;
>> +				regulator-ramp-delay = <5000>;
>> +				regulator-always-on;
>> +			};
>> +
>> +			buck4 {
>> +				regulator-min-microvolt = <500000>;
>> +				regulator-max-microvolt = <3300000>;
>> +				regulator-ramp-delay = <5000>;
>> +				regulator-always-on;
>> +			};
>> +
>> +			buck5: buck5 {
>> +				regulator-min-microvolt = <500000>;
>> +				regulator-max-microvolt = <3450000>;
>> +				regulator-ramp-delay = <5000>;
>> +				regulator-always-on;
>> +			};
>> +
>> +			buck6 {
>> +				regulator-min-microvolt = <500000>;
>> +				regulator-max-microvolt = <3450000>;
>> +				regulator-ramp-delay = <5000>;
>> +				regulator-always-on;
>> +			};
>> +
>> +			aldo1 {
>> +				regulator-min-microvolt = <500000>;
>> +				regulator-max-microvolt = <3400000>;
>> +				regulator-boot-on;
>> +			};
>> +
>> +			aldo2 {
>> +				regulator-min-microvolt = <500000>;
>> +				regulator-max-microvolt = <3400000>;
>> +			};
>> +
>> +			aldo3 {
>> +				regulator-min-microvolt = <500000>;
>> +				regulator-max-microvolt = <3400000>;
>> +			};
>> +
>> +			aldo4 {
>> +				regulator-min-microvolt = <500000>;
>> +				regulator-max-microvolt = <3400000>;
>> +			};
>> +
>> +			dldo1 {
>> +				regulator-min-microvolt = <500000>;
>> +				regulator-max-microvolt = <3400000>;
>> +				regulator-boot-on;
>> +			};
>> +
>> +			dldo2 {
>> +				regulator-min-microvolt = <500000>;
>> +				regulator-max-microvolt = <3400000>;
>> +			};
>> +
>> +			dldo3 {
>> +				regulator-min-microvolt = <500000>;
>> +				regulator-max-microvolt = <3400000>;
>> +			};
>> +
>> +			dldo4 {
>> +				regulator-min-microvolt = <500000>;
>> +				regulator-max-microvolt = <3400000>;
>> +				regulator-always-on;
>> +			};
>> +
>> +			dldo5 {
>> +				regulator-min-microvolt = <500000>;
>> +				regulator-max-microvolt = <3400000>;
>> +			};
>> +
>> +			dldo6 {
>> +				regulator-min-microvolt = <500000>;
>> +				regulator-max-microvolt = <3400000>;
>> +				regulator-always-on;
>> +			};
>> +
>> +			dldo7 {
>> +				regulator-min-microvolt = <500000>;
>> +				regulator-max-microvolt = <3400000>;
>> +			};
>> +		};
>> +	};
>> +};
>> +
>>   &uart0 {
>>   	pinctrl-0 = <&uart0_2_cfg>;
>>   	pinctrl-names = "default";
>> -- 
>> 2.53.0
>>
>>
> 

Re: [PATCH v2 1/6] riscv: dts: spacemit: k1-musepi-pro: add PMIC and power infrastructure

[Yixun Lan]

Hi Andre,

On 14:20 Tue 12 May     , Andre Heider wrote:
> On 12.05.26 1:39 PM, Yixun Lan wrote:
> > Hi Andre,
> > 
> > On 13:11 Mon 11 May     , Andre Heider wrote:
> >> Enable i2c8 and add the connected SpacemiT P1 PMIC with its related regulators
> >> for the board's power infrastructure and voltage regulation support.
> >>
> >> Signed-off-by: Andre Heider <a.heider@gmail.com>
> >> ---
> >>   .../riscv/boot/dts/spacemit/k1-musepi-pro.dts | 144 ++++++++++++++++++
> >>   1 file changed, 144 insertions(+)
> >>
> >> diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> >> index 29e333b670cf0..88c35ad1ef2ae 100644
> >> --- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> >> +++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> >> @@ -17,6 +17,7 @@ / {
> >>   	aliases {
> >>   		ethernet0 = &eth0;
> >>   		serial0 = &uart0;
> >> +		i2c8 = &i2c8;
> >>   	};
> >>   
> >>   	chosen {
> >> @@ -33,6 +34,25 @@ led1 {
> >>   			default-state = "on";
> >>   		};
> >>   	};
> >> +
> > ..
> >> +	reg_usb_vbus: regulator-usb-vbus {
> >> +		compatible = "regulator-fixed";
> >> +		regulator-name = "USBVBUS";
> >> +		regulator-min-microvolt = <12000000>;
> >> +		regulator-max-microvolt = <12000000>;
> >> +		regulator-boot-on;
> >> +		regulator-always-on;
> >> +	};
> > I think you can further drop above regulator, which merely serve as vin-supply
> > and not used by devices, plus it's a non-controllable fixed regulator
> 
> It is, but as mentioned on the cover letter I left this one as it's consistent with the other k1 boards.
> I don't care either way, so I'll just drop it.
> 
Please drop

It's a historical reason that we instroduced the unnecessary regulator
before Krzysztof's comment, in other words, we should also fix that too..

-- 
Yixun Lan (dlan)