[PATCH 0/3] spacemit: k1: Add support for Banana Pi BPI-CM6 IO board

[PATCH 0/3] spacemit: k1: Add support for Banana Pi BPI-CM6 IO board

[Junhui Liu]

This adds initial support for the Banana Pi BPI-CM6 IO board. The
BPI-CM6 is an industrial-grade RISC-V compute module powered by the
SpacemiT K1 SoC, featuring board-to-board connectors similar to the
Raspberry Pi CM4 form factor. For evaluation and development, the module
is paired with a companion IO carrier board.

During the board bring-up, GPIO45 and GPIO46 were found to be used by
the BPI-CM6 hardware as Ethernet PHY reset GPIOs, while the common K1
GMAC pinctrl groups currently mux them as optional GMAC reference clock
pins. Since the reference clock pins are not required on all K1 boards,
the first patch separates them into independent pinctrl groups so board
DTS files can select them only when the signal is actually wired.

This is based on the "dt-for-next" branch of the spacemit-com/linux.

Link: https://docs.banana-pi.org/en/BPI-CM6/BananaPi_BPI-CM6
Signed-off-by: Junhui Liu <junhui.liu@pigmoral.tech>
---
Junhui Liu (3):
      dt-bindings: riscv: spacemit: Add Banana Pi BPI-CM6 compatible
      riscv: dts: spacemit: k1: Split gmac_clk_ref into independent pinctrl groups
      riscv: dts: spacemit: k1: Add Banana Pi BPI-CM6 IO board

 .../devicetree/bindings/riscv/spacemit.yaml        |   5 +
 arch/riscv/boot/dts/spacemit/Makefile              |   1 +
 .../riscv/boot/dts/spacemit/k1-bananapi-cm6-io.dts | 215 +++++++++++++++++++
 arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi  | 227 +++++++++++++++++++++
 arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi       |  24 ++-
 5 files changed, 468 insertions(+), 4 deletions(-)
---
base-commit: 6edd9a0d32e1ef81133b8cb5b3bb3157a44da4d1
change-id: 20260522-bpi-cm6-dc38f91e3fec

Best regards,
-- 
Junhui Liu <junhui.liu@pigmoral.tech>

[PATCH 1/3] dt-bindings: riscv: spacemit: Add Banana Pi BPI-CM6 compatible

[Junhui Liu]

The Banana Pi BPI-CM6 IO board consists of the BPI-CM6 compute module
plugged into an IO carrier board, which is used for evaluation and
development.

The core CM6 module is based on the SpacemiT K1 SoC and provides PMIC,
DDR, the eth0 PHY and wireless connectivity. The carrier board extends
this by adding the eth1 PHY and external interfaces including Ethernet,
PCIe M.2, USB, MicroSD, QSPI, and serial console connectivity.

Signed-off-by: Junhui Liu <junhui.liu@pigmoral.tech>
---
 Documentation/devicetree/bindings/riscv/spacemit.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/riscv/spacemit.yaml b/Documentation/devicetree/bindings/riscv/spacemit.yaml
index af8030242bdc..3e868383eb4a 100644
--- a/Documentation/devicetree/bindings/riscv/spacemit.yaml
+++ b/Documentation/devicetree/bindings/riscv/spacemit.yaml
@@ -19,6 +19,11 @@ properties:
     const: '/'
   compatible:
     oneOf:
+      - items:
+          - enum:
+              - bananapi,bpi-cm6-io
+          - const: bananapi,bpi-cm6
+          - const: spacemit,k1
       - items:
           - enum:
               - bananapi,bpi-f3

-- 
2.54.0

Re: [PATCH 1/3] dt-bindings: riscv: spacemit: Add Banana Pi BPI-CM6 compatible

[Conor Dooley]

[-- Attachment #1: Type: text/plain, Size: 75 bytes --]

Acked-by: Conor Dooley <conor.dooley@microchip.com>
pw-bot: not-applicable

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]

[PATCH 2/3] riscv: dts: spacemit: k1: Split gmac_clk_ref into independent pinctrl groups

[Junhui Liu]

The gmac_clk_ref signal is optional for the GMAC controller and is not
strictly required for all hardware designs. In several already
upstreamed K1 boards, this signal remains unconnected or the
corresponding resistor is marked as NC.

Furthermore, the pins for gmac0_clk_ref (GPIO 45) and gmac1_clk_ref
(GPIO 46) may be used as GPIOs for other functions even when the
Ethernet controller is active. Splitting these into independent groups
avoids pinmux conflicts and allows boards to use the reference clock
signal only when it is actually needed.

Fixes: 60775f28cfb7 ("riscv: dts: spacemit: Add Ethernet support for K1")
Signed-off-by: Junhui Liu <junhui.liu@pigmoral.tech>
---
 arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi b/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi
index 4e9a62d0e85b..8c57ca05dabd 100644
--- a/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi
@@ -27,8 +27,16 @@ gmac0-pins {
 				 <K1_PADCONF(11, 1)>,	/* gmac0_tx_en */
 				 <K1_PADCONF(12, 1)>,	/* gmac0_mdc */
 				 <K1_PADCONF(13, 1)>,	/* gmac0_mdio */
-				 <K1_PADCONF(14, 1)>,	/* gmac0_int_n */
-				 <K1_PADCONF(45, 1)>;	/* gmac0_clk_ref */
+				 <K1_PADCONF(14, 1)>;	/* gmac0_int_n */
+
+			bias-pull-up = <0>;
+			drive-strength = <21>;
+		};
+	};
+
+	gmac0_clk_ref_cfg: gmac0-clk-ref-cfg {
+		gmac0-clk-ref-pins {
+			pinmux = <K1_PADCONF(45, 1)>;	/* gmac0_clk_ref */
 
 			bias-pull-up = <0>;
 			drive-strength = <21>;
@@ -51,8 +59,16 @@ gmac1-pins {
 				 <K1_PADCONF(40, 1)>,	/* gmac1_tx_en */
 				 <K1_PADCONF(41, 1)>,	/* gmac1_mdc */
 				 <K1_PADCONF(42, 1)>,	/* gmac1_mdio */
-				 <K1_PADCONF(43, 1)>,	/* gmac1_int_n */
-				 <K1_PADCONF(46, 1)>;	/* gmac1_clk_ref */
+				 <K1_PADCONF(43, 1)>;	/* gmac1_int_n */
+
+			bias-pull-up = <0>;
+			drive-strength = <21>;
+		};
+	};
+
+	gmac1_clk_ref_cfg: gmac1-clk-ref-cfg {
+		gmac1-clk-ref-pins {
+			pinmux = <K1_PADCONF(46, 1)>;	/* gmac1_clk_ref */
 
 			bias-pull-up = <0>;
 			drive-strength = <21>;

-- 
2.54.0

[PATCH 3/3] riscv: dts: spacemit: k1: Add Banana Pi BPI-CM6 IO board

[Junhui Liu]

The Banana Pi BPI-CM6 IO board combines the BPI-CM6 compute module with
an IO carrier board. The core module integrates the SpacemiT K1 SoC,
PMIC, DDR, eMMC, the eth0 PHY, and wireless connectivity. The companion
IO carrier board extends it by providing the eth1 PHY and exposing
standard interfaces, including dual Gigabit Ethernet, MicroSD, two USB-A
ports, a USB Type-C port, two PCIe M.2 slots, and a serial console.

The board also has two I2C EEPROMs. One is on the core module, which
stores factory manufacturing data and is marked read-only. The other is
on the carrier board, which is shipped unprogrammed and left writable
for evaluation purposes.

Add initial support for UART console, eMMC, SD card, I2C, EEPROMs,
PCIe, USB, and dual Ethernet interfaces.

Link: https://docs.banana-pi.org/en/BPI-CM6/BananaPi_BPI-CM6
Signed-off-by: Junhui Liu <junhui.liu@pigmoral.tech>
---
 arch/riscv/boot/dts/spacemit/Makefile              |   1 +
 .../riscv/boot/dts/spacemit/k1-bananapi-cm6-io.dts | 215 +++++++++++++++++++
 arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi  | 227 +++++++++++++++++++++
 3 files changed, 443 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/Makefile b/arch/riscv/boot/dts/spacemit/Makefile
index acb993c452ba..dd6125dc2012 100644
--- a/arch/riscv/boot/dts/spacemit/Makefile
+++ b/arch/riscv/boot/dts/spacemit/Makefile
@@ -1,4 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
+dtb-$(CONFIG_ARCH_SPACEMIT) += k1-bananapi-cm6-io.dtb
 dtb-$(CONFIG_ARCH_SPACEMIT) += k1-bananapi-f3.dtb
 dtb-$(CONFIG_ARCH_SPACEMIT) += k1-milkv-jupiter.dtb
 dtb-$(CONFIG_ARCH_SPACEMIT) += k1-musepi-pro.dtb
diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6-io.dts b/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6-io.dts
new file mode 100644
index 000000000000..b2767f44e8d6
--- /dev/null
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6-io.dts
@@ -0,0 +1,215 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2026 Junhui Liu <junhui.liu@pigmoral.tech>
+ */
+
+#include "k1-bananapi-cm6.dtsi"
+
+#include <dt-bindings/leds/common.h>
+
+/ {
+	model = "Banana Pi BPI-CM6 IO Board";
+	compatible = "bananapi,bpi-cm6-io", "bananapi,bpi-cm6", "spacemit,k1";
+
+	aliases {
+		ethernet0 = &eth0;
+		ethernet1 = &eth1;
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led0 {
+			color = <LED_COLOR_ID_RED>;
+			gpios = <&gpio K1_GPIO(96) GPIO_ACTIVE_LOW>;
+		};
+
+		led1 {
+			color = <LED_COLOR_ID_BLUE>;
+			gpios = <&gpio K1_GPIO(97) GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	vdd_sys_12v: regulator-vdd-sys-12v {
+		compatible = "regulator-fixed";
+		regulator-name = "VDD_SYS";
+		regulator-min-microvolt = <12000000>;
+		regulator-max-microvolt = <12000000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	reg_vdd_5v0: regulator-vdd-5v0 {
+		compatible = "regulator-fixed";
+		regulator-name = "VDD_5V0";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-boot-on;
+		regulator-always-on;
+		vin-supply = <&vdd_sys_12v>;
+	};
+
+	pcie_vcc_3v3: regulator-pcie-vcc-3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "NGFF_KEYM_VDD";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		regulator-always-on;
+		vin-supply = <&vdd_sys_12v>;
+	};
+
+	usb_vbus_5v: regulator-usb-vbus-5v {
+		compatible = "regulator-fixed";
+		regulator-name = "VBUS_A_B";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		gpio = <&gpio K1_GPIO(124) GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		vin-supply = <&reg_vdd_5v0>;
+	};
+
+	reg_vdd_3v3: regulator-vdd-3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "VDD_3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		regulator-always-on;
+		vin-supply = <&vdd_sys_12v>;
+	};
+
+	sd_vcc_3v3: regulator-sd-vcc-3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "3.3VS_CARD";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&gpio K1_GPIO(127) GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		vin-supply = <&reg_vdd_3v3>;
+	};
+};
+
+&combo_phy {
+	status = "okay";
+};
+
+&eth0 {
+	status = "okay";
+};
+
+&eth1 {
+	nvmem-cells = <&mac_address 1>;
+	nvmem-cell-names = "mac-address";
+	phy-handle = <&rgmii1>;
+	phy-mode = "rgmii-id";
+	pinctrl-names = "default";
+	pinctrl-0 = <&gmac1_cfg>;
+	rx-internal-delay-ps = <0>;
+	tx-internal-delay-ps = <250>;
+	status = "okay";
+
+	mdio-bus {
+		#address-cells = <0x1>;
+		#size-cells = <0x0>;
+
+		reset-gpios = <&gpio K1_GPIO(46) GPIO_ACTIVE_LOW>;
+		reset-delay-us = <10000>;
+		reset-post-delay-us = <100000>;
+
+		rgmii1: phy@1 {
+			reg = <0x1>;
+		};
+	};
+};
+
+&i2c2 {
+	eeprom@54 {
+		compatible = "atmel,24c08";
+		reg = <0x54>;
+		vcc-supply = <&buck3_1v8>;
+		pagesize = <16>;
+		size = <1024>;
+	};
+};
+
+&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 = <&pcie_vcc_3v3>;
+};
+
+&pcie2 {
+	vpcie3v3-supply = <&pcie_vcc_3v3>;
+	status = "okay";
+};
+
+&qspi {
+	pinctrl-names = "default";
+	pinctrl-0 = <&qspi_cfg>;
+	status = "okay";
+};
+
+&sdhci0 {
+	pinctrl-names = "default", "uhs";
+	pinctrl-0 = <&mmc1_cfg>;
+	pinctrl-1 = <&mmc1_uhs_cfg>;
+	bus-width = <4>;
+	cd-gpios = <&gpio K1_GPIO(80) (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+	no-mmc;
+	no-sdio;
+	disable-wp;
+	cap-sd-highspeed;
+	vmmc-supply = <&sd_vcc_3v3>;
+	vqmmc-supply = <&aldo1>;
+	sd-uhs-sdr25;
+	sd-uhs-sdr50;
+	sd-uhs-sdr104;
+	status = "okay";
+};
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_2_cfg>;
+	status = "okay";
+};
+
+&usbphy2 {
+	status = "okay";
+};
+
+&usb_dwc3 {
+	dr_mode = "host";
+	vbus-supply = <&usb_vbus_5v>;
+	status = "okay";
+};
+
+&vddin_sys_5v {
+	vin-supply = <&reg_vdd_5v0>;
+};
diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi b/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi
new file mode 100644
index 000000000000..9b91128edb34
--- /dev/null
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi
@@ -0,0 +1,227 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2026 Junhui Liu <junhui.liu@pigmoral.tech>
+ */
+
+#include "k1.dtsi"
+#include "k1-pinctrl.dtsi"
+
+/ {
+	model = "Banana Pi BPI-CM6 Module";
+	compatible = "bananapi,bpi-cm6", "spacemit,k1";
+
+	aliases {
+		i2c2 = &i2c2;
+		i2c8 = &i2c8;
+	};
+
+	vddin_sys_5v: regulator-vddin-sys-5v {
+		compatible = "regulator-fixed";
+		regulator-name = "VDDIN_SYS";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	reg_vcc_4v: regulator-vcc-4v {
+		compatible = "regulator-fixed";
+		regulator-name = "VCC4V0_SYS";
+		regulator-min-microvolt = <4000000>;
+		regulator-max-microvolt = <4000000>;
+		regulator-boot-on;
+		regulator-always-on;
+		vin-supply = <&vddin_sys_5v>;
+	};
+};
+
+&emmc {
+	bus-width = <8>;
+	mmc-hs400-1_8v;
+	mmc-hs400-enhanced-strobe;
+	non-removable;
+	no-sd;
+	no-sdio;
+	status = "okay";
+};
+
+&eth0 {
+	nvmem-cells = <&mac_address 0>;
+	nvmem-cell-names = "mac-address";
+	phy-handle = <&rgmii0>;
+	phy-mode = "rgmii-id";
+	pinctrl-names = "default";
+	pinctrl-0 = <&gmac0_cfg>;
+	rx-internal-delay-ps = <0>;
+	tx-internal-delay-ps = <0>;
+
+	mdio-bus {
+		#address-cells = <0x1>;
+		#size-cells = <0x0>;
+
+		reset-gpios = <&gpio K1_GPIO(45) GPIO_ACTIVE_LOW>;
+		reset-delay-us = <10000>;
+		reset-post-delay-us = <100000>;
+
+		rgmii0: phy@1 {
+			reg = <0x1>;
+		};
+	};
+};
+
+&pdma {
+	status = "okay";
+};
+
+&i2c2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c2_0_cfg>;
+	status = "okay";
+
+	eeprom@50 {
+		compatible = "atmel,24c02";
+		reg = <0x50>;
+		vcc-supply = <&buck3_1v8>;
+		pagesize = <16>;
+		read-only;
+		size = <256>;
+
+		nvmem-layout {
+			compatible = "onie,tlv-layout";
+
+			mac_address: mac-address {
+				#nvmem-cell-cells = <1>;
+			};
+
+			num-macs {
+			};
+
+			serial-number {
+			};
+		};
+	};
+};
+
+&i2c8 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c8_cfg>;
+	status = "okay";
+
+	pmic@41 {
+		compatible = "spacemit,p1";
+		reg = <0x41>;
+		interrupts = <64>;
+		vin1-supply = <&reg_vcc_4v>;
+		vin2-supply = <&reg_vcc_4v>;
+		vin3-supply = <&reg_vcc_4v>;
+		vin4-supply = <&reg_vcc_4v>;
+		vin5-supply = <&reg_vcc_4v>;
+		vin6-supply = <&reg_vcc_4v>;
+		aldoin-supply = <&reg_vcc_4v>;
+		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_1v8: 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: 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>;
+			};
+		};
+	};
+};

-- 
2.54.0

Re: [PATCH 3/3] riscv: dts: spacemit: k1: Add Banana Pi BPI-CM6 IO board

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Low] The `vpcie3v3-supply` property is incorrectly applied to both the PCIe host controller nodes (`&pcie1`, `&pcie2`) and their root port child nodes (`&pcie1_port`, `&pcie2_port`).
--

commit 0620787d4f86f8d706f7dc3a6b25263906add1bd
Author: Junhui Liu <junhui.liu@pigmoral.tech>

riscv: dts: spacemit: k1: Add Banana Pi BPI-CM6 IO board

This commit adds initial device tree support for the Banana Pi BPI-CM6 IO
board. The board features the SpacemiT K1 SoC, and this patch configures
interfaces such as UART, eMMC, SD card, I2C, PCIe, USB, and dual Ethernet.

Link: https://docs.banana-pi.org/en/BPI-CM6/BananaPi_BPI-CM6

> diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6-io.dts b/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6-io.dts
> new file mode 100644
> index 0000000000000..b2767f44e8d62
> --- /dev/null
> +++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6-io.dts

[ ... ]

> +&pcie1_port {
> +	phys = <&pcie1_phy>;
> +	vpcie3v3-supply = <&pcie_vcc_3v3>;
> +};
> +
> +&pcie1 {
> +	vpcie3v3-supply = <&pcie_vcc_3v3>;

[Severity: Low]
Does this cause a dt_binding_check validation failure for the host
controller node?

According to the spacemit,k1-pcie-host.yaml binding schema, the
vpcie3v3-supply property is exclusively defined and required within the
patternProperties for the root port child node, rather than for the
top-level host controller itself.

Should this property be removed from the &pcie1 node to avoid an
unevaluated property warning?

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

[ ... ]

> +&pcie2_port {
> +	phys = <&pcie2_phy>;
> +	vpcie3v3-supply = <&pcie_vcc_3v3>;
> +};
> +
> +&pcie2 {
> +	vpcie3v3-supply = <&pcie_vcc_3v3>;

[Severity: Low]
Similar to the &pcie1 node above, does the vpcie3v3-supply property belong
in the host controller node &pcie2, or should it only be present in the
&pcie2_port child node?

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

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260522-bpi-cm6-v1-0-707ef1917a30@pigmoral.tech?part=3

Re: [PATCH 3/3] riscv: dts: spacemit: k1: Add Banana Pi BPI-CM6 IO board

[Michael Opdenacker]

Hi Junhui

Thanks a lot for these patches!
Yours are much more exhaustive than the ones I was cooking.

On 5/22/26 12:01 PM, Junhui Liu wrote:
> The Banana Pi BPI-CM6 IO board combines the BPI-CM6 compute module with
> an IO carrier board. The core module integrates the SpacemiT K1 SoC,
> PMIC, DDR, eMMC, the eth0 PHY, and wireless connectivity. The companion
> IO carrier board extends it by providing the eth1 PHY and exposing
> standard interfaces, including dual Gigabit Ethernet, MicroSD, two USB-A
> ports, a USB Type-C port, two PCIe M.2 slots, and a serial console.
>
> The board also has two I2C EEPROMs. One is on the core module, which
> stores factory manufacturing data and is marked read-only. The other is
> on the carrier board, which is shipped unprogrammed and left writable
> for evaluation purposes.
>
> Add initial support for UART console, eMMC, SD card, I2C, EEPROMs,
> PCIe, USB, and dual Ethernet interfaces.
>
> Link: https://docs.banana-pi.org/en/BPI-CM6/BananaPi_BPI-CM6
> Signed-off-by: Junhui Liu <junhui.liu@pigmoral.tech>
> ---
>   arch/riscv/boot/dts/spacemit/Makefile              |   1 +
>   .../riscv/boot/dts/spacemit/k1-bananapi-cm6-io.dts | 215 +++++++++++++++++++
>   arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi  | 227 +++++++++++++++++++++
>   3 files changed, 443 insertions(+)

Reviewed-by: Michael Opdenacker <michael.opdenacker@rootcommit.com>
Tested-by: Michael Opdenacker <michael.opdenacker@rootcommit.com>

For booting on MMC, I also had to add Iker Pedrosa's patches in Ulf 
Hanson's mmc/next branch
(https://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc.git/log/?h=next)
Thanks again!
Cheers
Michael.

-- 
Root Commit
Embedded Linux Training and Consulting
https://rootcommit.com

Re: [PATCH 3/3] riscv: dts: spacemit: k1: Add Banana Pi BPI-CM6 IO board

[Junhui Liu]

On Fri May 22, 2026 at 6:01 PM CST, Junhui Liu wrote:
> The Banana Pi BPI-CM6 IO board combines the BPI-CM6 compute module with
> an IO carrier board. The core module integrates the SpacemiT K1 SoC,
> PMIC, DDR, eMMC, the eth0 PHY, and wireless connectivity. The companion
> IO carrier board extends it by providing the eth1 PHY and exposing
> standard interfaces, including dual Gigabit Ethernet, MicroSD, two USB-A
> ports, a USB Type-C port, two PCIe M.2 slots, and a serial console.
>
> The board also has two I2C EEPROMs. One is on the core module, which
> stores factory manufacturing data and is marked read-only. The other is
> on the carrier board, which is shipped unprogrammed and left writable
> for evaluation purposes.
>
> Add initial support for UART console, eMMC, SD card, I2C, EEPROMs,
> PCIe, USB, and dual Ethernet interfaces.
>
> Link: https://docs.banana-pi.org/en/BPI-CM6/BananaPi_BPI-CM6
> Signed-off-by: Junhui Liu <junhui.liu@pigmoral.tech>
> ---
>  arch/riscv/boot/dts/spacemit/Makefile              |   1 +
>  .../riscv/boot/dts/spacemit/k1-bananapi-cm6-io.dts | 215 +++++++++++++++++++
>  arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi  | 227 +++++++++++++++++++++
>  3 files changed, 443 insertions(+)
>

[...]

> +
> +&pcie1_port {
> +	phys = <&pcie1_phy>;
> +	vpcie3v3-supply = <&pcie_vcc_3v3>;
> +};
> +
> +&pcie1 {
> +	vpcie3v3-supply = <&pcie_vcc_3v3>;

Thanks for the reminder from Sashiko AI.

The vpcie3v3-supply property should be removed from the PCIe host
controller node here. According to the binding, this supply belongs to
the PCIe root port child node.

I have checked the driver side: devm_regulator_get_enable() eventually
calls of_get_regulator(), which first looks up the supply in the current
device node and then falls back to searching child nodes if it is not
found there. I also verified on hardware that keeping vpcie3v3-supply
only in the port node still lets the driver resolve the regulator
correctly.

So I will drop the duplicate vpcie3v3-supply property here in the next
version.

> +	status = "okay";
> +};
> +
> +&pcie2_phy {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pcie2_4_cfg>;
> +	status = "okay";
> +};
> +
> +&pcie2_port {
> +	phys = <&pcie2_phy>;
> +	vpcie3v3-supply = <&pcie_vcc_3v3>;
> +};
> +
> +&pcie2 {
> +	vpcie3v3-supply = <&pcie_vcc_3v3>;

Same here.

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

[...]

-- 
Best regards,
Junhui Liu