[PATCH v5 0/5] Enable Bluetooth and WiFi on K3 Pico ITX

[PATCH v5 0/5] Enable Bluetooth and WiFi on K3 Pico ITX

[Aurelien Jarno]

This patchset enables Bluetooth through USB on the K3 Pico ITX board and
adds the rfkill nodes for Bluetooth and WLAN so that the devices can be
activated.

Note that WLAN support (patch 4) is only useful with the following
patchset, but they can be applied independently:
- https://lore.kernel.org/spacemit/20260923015016.64069-1-inochiama@gmail.com/T/#t

Changes v4 (unfortunately wrongly submitted as v3) -> v5
- rebase onto spacemit/dt-for-next
- explain in patch1 why the change does not impact the DT schema
  validation (reported by Sashiko)
     
Changes v3 -> v4
- fully move the phy definition and the board level
- rebase onto 7.3-rc1

Changes v2 -> v3 
 - reorder patches in a more logical order
 - rebase on current linus/master
 - add patch 1 to move phy definition to the board level for the "usb3d"
   controller
 - remove link to USB3 phys, they can't be added if the combo phy is not
   configured accordingly - also enable Bluetooth and WLAN drivers in
   defconfig

Changes v1 -> v2
 - Rebase on current spacemit/dt-for-next branch
 - Collect Tested-by tag
 - Add link to USB3 PHYs in DT now that K3 PHY support is merged


Aurelien Jarno (5):
  riscv: dts: spacemit: k3: move USB3 phy to board level
  riscv: dts: spacemit: k3: add USB3 B and C controllers for Pico-ITX
    board
  riscv: dts: spacemit: k3: add rfkill node for Bluetooth on Pico-ITX
    board
  riscv: dts: spacemit: k3: add rfkill node for WLAN on the K3 Pico-ITX
    board
  riscv64: defconfig: Enable BT and WLAN support for SpacemiT K3
    Pico-ITX board

 arch/riscv/boot/dts/spacemit/k3-pico-itx.dts | 38 ++++++++++++
 arch/riscv/boot/dts/spacemit/k3.dtsi         | 63 +++++++++++++++++++-
 arch/riscv/configs/defconfig                 |  8 +++
 3 files changed, 106 insertions(+), 3 deletions(-)

-- 
2.53.0

[PATCH v5 1/5] riscv: dts: spacemit: k3: move USB3 phy to board level

[Aurelien Jarno]

On the SpacemiT K3 SoC, the combo phy provides 8 lines that can
either be used for PCIe or USB3, depending on its configuration
(spacemit,apmu). This configuration is defined at the board level, and
assigning a phy line to a USB3 controller while it is configured as PCIe
results in an "Invalid PHY mode" error.

Move the USB phy definitions at the board level, as it is done for the
submitted PCIe controller [1]. As a consequence, boards that do not
enable a USB3 controller node will not match the DT schema due to
missing PHY entries. This is not an issue as dtbs_check only validates
enabled nodes.

[1] https://lore.kernel.org/spacemit/20260923015016.64069-1-inochiama@gmail.com

Fixes: 46380e4b1534 ("riscv: dts: spacemit: k3: add USB controller and USB phy support")
Cc: Inochi Amaoto <inochiama@gmail.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---
 arch/riscv/boot/dts/spacemit/k3-pico-itx.dts | 2 ++
 arch/riscv/boot/dts/spacemit/k3.dtsi         | 3 ---
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts b/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
index b084a35aa00e3..0a6f669d509a9 100644
--- a/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
+++ b/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
@@ -328,5 +328,7 @@ &usb3d_u2phy {
 };
 
 &usb3d {
+	phys = <&usb3d_u2phy>, <&combophy 4 PHY_TYPE_USB3>;
+	phy-names = "usb2-phy", "usb3-phy";
 	status = "okay";
 };
diff --git a/arch/riscv/boot/dts/spacemit/k3.dtsi b/arch/riscv/boot/dts/spacemit/k3.dtsi
index b9977e78e096a..1af47b7f1c8af 100644
--- a/arch/riscv/boot/dts/spacemit/k3.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k3.dtsi
@@ -452,9 +452,6 @@ usb3d: usb@81a00000 {
 				 <&syscon_apmu RESET_APMU_USB3_D_VCC>,
 				 <&syscon_apmu RESET_APMU_USB3_D_PHY>;
 			reset-names = "ahb", "vcc", "phy";
-			phys = <&usb3d_u2phy>,
-			       <&combophy 4 PHY_TYPE_USB3>;
-			phy-names = "usb2-phy", "usb3-phy";
 			phy_type = "utmi";
 			snps,dis_enblslpm_quirk;
 			snps,dis_u2_susphy_quirk;
-- 
2.53.0

[PATCH v5 2/5] riscv: dts: spacemit: k3: add USB3 B and C controllers for Pico-ITX board

[Aurelien Jarno]

The SpacemiT K3 has 4 USB3 controllers labelled A to D.

On the K3 Pico-ITX board, the controllers B and C are used in USB2 mode
only respectively for the M.2 B-Key slot and for the RTL8852BE Bluetooth
controller.

Add the two controller nodes. On the K3 Pico-ITX board, enable the
controllers nodes and add the two corresponding USB2 PHY nodes.

Tested-by: Anirudh Srinivasan <asrinivasan@oss.tenstorrent.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---
 arch/riscv/boot/dts/spacemit/k3-pico-itx.dts | 22 +++++++
 arch/riscv/boot/dts/spacemit/k3.dtsi         | 60 ++++++++++++++++++++
 2 files changed, 82 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts b/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
index 0a6f669d509a9..5aa6fa89cab58 100644
--- a/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
+++ b/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
@@ -323,6 +323,28 @@ &usb2_phy {
 	status = "okay";
 };
 
+&usb3b {
+	phys = <&usb3b_u2phy>;
+	phy-names = "usb2-phy";
+	maximum-speed = "high-speed";
+	status = "okay";
+};
+
+&usb3b_u2phy {
+	status = "okay";
+};
+
+&usb3c {
+	phys = <&usb3c_u2phy>;
+	phy-names = "usb2-phy";
+	maximum-speed = "high-speed";
+	status = "okay";
+};
+
+&usb3c_u2phy {
+	status = "okay";
+};
+
 &usb3d_u2phy {
 	status = "okay";
 };
diff --git a/arch/riscv/boot/dts/spacemit/k3.dtsi b/arch/riscv/boot/dts/spacemit/k3.dtsi
index 1af47b7f1c8af..cf1c8b572c86b 100644
--- a/arch/riscv/boot/dts/spacemit/k3.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k3.dtsi
@@ -441,6 +441,66 @@ soc: soc {
 		dma-noncoherent;
 		ranges;
 
+		usb3b: usb@81400000 {
+			compatible = "spacemit,k3-dwc3";
+			reg = <0x0 0x81400000 0x0 0x10000>;
+			interrupts = <125 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-parent = <&saplic>;
+			clocks = <&syscon_apmu CLK_APMU_USB3_PORTB_BUS>;
+			clock-names = "usbdrd30";
+			resets = <&syscon_apmu RESET_APMU_USB3_B_AHB>,
+				 <&syscon_apmu RESET_APMU_USB3_B_VCC>,
+				 <&syscon_apmu RESET_APMU_USB3_B_PHY>;
+			reset-names = "ahb", "vcc", "phy";
+			phy_type = "utmi";
+			snps,dis_enblslpm_quirk;
+			snps,dis_u2_susphy_quirk;
+			snps,dis_u3_susphy_quirk;
+			snps,dis-del-phy-power-chg-quirk;
+			snps,dis-tx-ipgap-linecheck-quirk;
+			snps,parkmode-disable-ss-quirk;
+			dr_mode = "host";
+			status = "disabled";
+		};
+
+		usb3b_u2phy: phy@81500000 {
+			compatible = "spacemit,k3-usb2-phy";
+			reg = <0x0 0x81500000 0x0 0x200>;
+			clocks = <&syscon_apmu CLK_APMU_USB3_PORTB_BUS>;
+			#phy-cells = <0>;
+			status = "disabled";
+		};
+
+		usb3c: usb@81700000 {
+			compatible = "spacemit,k3-dwc3";
+			reg = <0x0 0x81700000 0x0 0x10000>;
+			interrupts = <148 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-parent = <&saplic>;
+			clocks = <&syscon_apmu CLK_APMU_USB3_PORTC_BUS>;
+			clock-names = "usbdrd30";
+			resets = <&syscon_apmu RESET_APMU_USB3_C_AHB>,
+				 <&syscon_apmu RESET_APMU_USB3_C_VCC>,
+				 <&syscon_apmu RESET_APMU_USB3_C_PHY>;
+			reset-names = "ahb", "vcc", "phy";
+			phy_type = "utmi";
+			snps,dis_enblslpm_quirk;
+			snps,dis_u2_susphy_quirk;
+			snps,dis_u3_susphy_quirk;
+			snps,dis-del-phy-power-chg-quirk;
+			snps,dis-tx-ipgap-linecheck-quirk;
+			snps,parkmode-disable-ss-quirk;
+			dr_mode = "host";
+			status = "disabled";
+		};
+
+		usb3c_u2phy: phy@81800000 {
+			compatible = "spacemit,k3-usb2-phy";
+			reg = <0x0 0x81800000 0x0 0x200>;
+			clocks = <&syscon_apmu CLK_APMU_USB3_PORTC_BUS>;
+			#phy-cells = <0>;
+			status = "disabled";
+		};
+
 		usb3d: usb@81a00000 {
 			compatible = "spacemit,k3-dwc3";
 			reg = <0x0 0x81a00000 0x0 0x10000>;
-- 
2.53.0

[PATCH v5 3/5] riscv: dts: spacemit: k3: add rfkill node for Bluetooth on Pico-ITX board

[Aurelien Jarno]

On the K3 Pico-ITX board, by default the GPIO pin that connects to the
RTL8852BE Bluetooth enable signal is driven low, resulting in
impossibility to use Bluetooth. Add a DT node to expose it as an RFKILL
device, which lets the Bluetooth driver or userspace toggle it as
required.

Tested-by: Anirudh Srinivasan <asrinivasan@oss.tenstorrent.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---
 arch/riscv/boot/dts/spacemit/k3-pico-itx.dts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts b/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
index 5aa6fa89cab58..d3f256dffb4fd 100644
--- a/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
+++ b/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
@@ -43,6 +43,13 @@ reg_aux_vcc5v: regulator-aux-vcc5v {
 		regulator-max-microvolt = <5000000>;
 		regulator-always-on;
 	};
+
+	rfkill-usb-bt {
+		compatible = "rfkill-gpio";
+		label = "rfkill-usb-bt";
+		radio-type = "bluetooth";
+		shutdown-gpios = <&gpio 0 30 GPIO_ACTIVE_HIGH>;
+	};
 };
 
 &i2c2 {
-- 
2.53.0

[PATCH v5 4/5] riscv: dts: spacemit: k3: add rfkill node for WLAN on the K3 Pico-ITX board

[Aurelien Jarno]

On the K3 Pico-ITX board, by default the GPIO pin that connects to the
RTL8852BE WLAN enable signal is driven low, resulting in impossibility
to connect to any network. Add a DT node to expose it as an RFKILL
device, which lets the WLAN driver or userspace toggle it as required.

Tested-by: Anirudh Srinivasan <asrinivasan@oss.tenstorrent.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---
 arch/riscv/boot/dts/spacemit/k3-pico-itx.dts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts b/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
index d3f256dffb4fd..dda420900aa2c 100644
--- a/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
+++ b/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
@@ -44,6 +44,13 @@ reg_aux_vcc5v: regulator-aux-vcc5v {
 		regulator-always-on;
 	};
 
+	rfkill-pcie-wlan {
+		compatible = "rfkill-gpio";
+		label = "rfkill-pcie-wlan";
+		radio-type = "wlan";
+		shutdown-gpios = <&gpio 1 3 GPIO_ACTIVE_HIGH>;
+	};
+
 	rfkill-usb-bt {
 		compatible = "rfkill-gpio";
 		label = "rfkill-usb-bt";
-- 
2.53.0

[PATCH v5 5/5] riscv64: defconfig: Enable BT and WLAN support for SpacemiT K3 Pico-ITX board

[Aurelien Jarno]

The SpacemiT K3 Pico-ITX board has a RTL8852BE Bluetooth and WLAN
controller connected through PCIe and USB. For the WLAN part, enable
CFG80211, MAC80211, RTW89 and RTW89_8852BE as modules. For the
Bluetooth, enable CONFIG_BT and CONFIG_BT_HCIBTUSB as modules.

Both also require RFKILL and RFKILL_GPIO.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---
 arch/riscv/configs/defconfig | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/riscv/configs/defconfig b/arch/riscv/configs/defconfig
index 04ae305d5511b..1bc79ba2ee649 100644
--- a/arch/riscv/configs/defconfig
+++ b/arch/riscv/configs/defconfig
@@ -100,6 +100,12 @@ CONFIG_NET_CLS_CGROUP=m
 CONFIG_NETLINK_DIAG=y
 CONFIG_CGROUP_NET_PRIO=y
 CONFIG_CAN=m
+CONFIG_BT=m
+CONFIG_BT_HCIBTUSB=m
+CONFIG_CFG80211=m
+CONFIG_MAC80211=m
+CONFIG_RFKILL=m
+CONFIG_RFKILL_GPIO=m
 CONFIG_NET_9P=y
 CONFIG_NET_9P_VIRTIO=y
 CONFIG_PCI=y
@@ -143,6 +149,8 @@ CONFIG_DWMAC_THEAD=m
 CONFIG_MICREL_PHY=y
 CONFIG_MICROSEMI_PHY=y
 CONFIG_MOTORCOMM_PHY=y
+CONFIG_RTW89=m
+CONFIG_RTW89_8852BE=m
 CONFIG_INPUT_MOUSEDEV=y
 CONFIG_INPUT_EVDEV=y
 CONFIG_KEYBOARD_GPIO=y
-- 
2.53.0

Re: [PATCH v5 2/5] riscv: dts: spacemit: k3: add USB3 B and C controllers for Pico-ITX board

[Aurelien Jarno]

Hi,

On 2026-09-28 21:02, sashiko-bot@kernel.org wrote:
> Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
> - [Low] dt-bindings: missing required phys properties in usb3b and usb3c nodes
> --
> 
> commit 89b216baa5d6be0e4a7be800d568bba679087495
> Author: Aurelien Jarno <aurelien@aurel32.net>
> 
> riscv: dts: spacemit: k3: add USB3 B and C controllers for Pico-ITX board
> 
> This commit adds the USB3 controller nodes (B and C) to the SpacemiT K3 SoC
> device tree. It also enables them and adds the corresponding USB2 PHY nodes
> for the Pico-ITX board.
> 
> > diff --git a/arch/riscv/boot/dts/spacemit/k3.dtsi b/arch/riscv/boot/dts/spacemit/k3.dtsi
> > index 1af47b7f1c8af..cf1c8b572c86b 100644
> > --- a/arch/riscv/boot/dts/spacemit/k3.dtsi
> > +++ b/arch/riscv/boot/dts/spacemit/k3.dtsi
> 
> [ ... ]
> 
> > @@ -441,6 +441,66 @@ soc: soc {
> >  		dma-noncoherent;
> >  		ranges;
> >  
> > +		usb3b: usb@81400000 {
> > +			compatible = "spacemit,k3-dwc3";
> > +			reg = <0x0 0x81400000 0x0 0x10000>;
> > +			interrupts = <125 IRQ_TYPE_LEVEL_HIGH>;
> 
> [Severity: Low]
> Does omitting the phys and phy-names properties here cause a devicetree
> validation regression?

No it doesn't, I checked that before the submitting the patch.

> The SoC devicetree fails dtbs_check validation against the binding schema
> (spacemit,k1-dwc3.yaml), which unconditionally requires the phys and
> phy-names properties.

No, as explained in patch 1, dtbs_check only check enabled nodes, so this is fine.

> Should this node define its hardwired connection to usb3b_u2phy via the
> phys and phy-names properties here, instead of omitting these SoC-internal
> hardwired connections from k3.dtsi and forcing downstream boards to
> redundantly define the SoC hardware topology?
> 
> > +			interrupt-parent = <&saplic>;
> > +			clocks = <&syscon_apmu CLK_APMU_USB3_PORTB_BUS>;

No, this has already been discussed as part of the v3 review:
https://lore.kernel.org/spacemit/aomWjQGk_p84pPD2@inochi.infowork/

> [ ... ]
> 
> > +		usb3c: usb@81700000 {
> > +			compatible = "spacemit,k3-dwc3";
> > +			reg = <0x0 0x81700000 0x0 0x10000>;
> > +			interrupts = <148 IRQ_TYPE_LEVEL_HIGH>;
> 
> [Severity: Low]
> Similarly, does this node also need to define its hardwired connection to
> usb3c_u2phy via the phys and phy-names properties to avoid the same schema
> validation regression?
> 
> > +			interrupt-parent = <&saplic>;
> > +			clocks = <&syscon_apmu CLK_APMU_USB3_PORTC_BUS>;

Ditto.

Regards
Aurelien

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien@aurel32.net                     http://aurel32.net