[PATCH v2 0/4] spacemit: k1-bananapi-f3: Fix the power source of USB3 nodes

[PATCH v2 0/4] spacemit: k1-bananapi-f3: Fix the power source of USB3 nodes

[Anand Moon]

Following changes fix the power source of USB 3 and pcie on K1-Bananapi-F3
development board.

Bananapi F3 schematics.
[1] https://drive.google.com/file/d/19iLJ5xnCB_oK8VeQjkPGjzAn39WYyylv/view (page 24)


v1: https://lore.kernel.org/all/20260325081700.1502-1-linux.amoon@gmail.com/

v2: Add pcie vin for pcie regulator.

To verify check regulator_summary for more details

$ cat /sys/kernel/debug/regulator/regulator_summary
 dc_in_12v                        3    2      0 unknown 12000mV     0mA 12000mV 12000mV
    vcc_4v                        1    0      0 unknown  4000mV     0mA  4000mV  4000mV
    vcc5v0_sys                    4    3      0 unknown  5000mV     0mA  5000mV  5000mV
       PCIE_VCC3V3                3    2      0 unknown  3300mV     0mA  3300mV  3300mV
          ca800000.pcie-vpcie3v3   1                                 0mA     0mV     0mV
          ca400000.pcie-vpcie3v3   1                                 0mA     0mV     0mV
       5V_VBUS                    2    1      0 unknown  5000mV     0mA  5000mV  5000mV
          c0a00000.usb:hub@1-vdd   1                                 0mA     0mV     0mV
       VCC5V0_HUB                 2    1      0 unknown  5000mV     0mA  5000mV  5000mV
          c0a00000.usb-vbus       1                                 0mA     0mV     0mV

Thanks
-Anand

Anand Moon (4):
  riscv: dts: spacemit: k1-bananapi-f3: Add vcc5v0_sys regulator for
    Banana Pi F3
  riscv: dts: spacemit: k1-bananapi-f3: Update USB regulator on onboard
    usb and label
  riscv: dts: spacemit: k1-bananapi-f3: Correct USB hub power hierarchy
  riscv: dts: spacemit: k1-bananapi-f3: Add vin-supply for PCIe 3.3V
    regulator

 .../boot/dts/spacemit/k1-bananapi-f3.dts      | 25 +++++++++++++++----
 1 file changed, 20 insertions(+), 5 deletions(-)


base-commit: f1a5e78a55ebf2b05777fd5eb738038ddae609d6
-- 
2.50.1

[PATCH v2 1/4] riscv: dts: spacemit: k1-bananapi-f3: Add vcc5v0_sys regulator for Banana Pi F3

[Anand Moon]

Define the system 5V fixed regulator (vcc5v0_sys) supplied by the
DC input. As per the schematics, vcc5v0_sys is the input power source
for the VCC5V0_HUB and 5V_VBUS reglators. Update these regulators
to correctly reference vcc5v0_sys as their parent (vin-supply).

Cc: Han Gao <gaohan@iscas.ac.cn>
Cc: Ze Huang <huang.ze@linux.dev>
Cc: Chukun Pan <amadeus@jmu.edu.cn>
Signed-off-by: Anand Moon <linux.amoon@gmail.com>
---
 arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
index 5790d927b93d..9727ecdd9f6b 100644
--- a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
@@ -50,6 +50,16 @@ reg_dc_in: regulator-dc-in-12v {
 		regulator-always-on;
 	};
 
+	reg_vcc5v0_sys: regulator-vcc5v0-sys {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc5v0_sys";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-boot-on;
+		regulator-always-on;
+		vin-supply = <&reg_dc_in>;
+	};
+
 	reg_vcc_4v: regulator-vcc-4v {
 		compatible = "regulator-fixed";
 		regulator-name = "vcc_4v";
@@ -66,6 +76,7 @@ regulator-usb3-vbus-5v {
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
 		regulator-always-on;
+		vin-supply = <&reg_vcc5v0_sys>;
 		gpio = <&gpio K1_GPIO(97) GPIO_ACTIVE_HIGH>;
 		enable-active-high;
 	};
@@ -75,6 +86,7 @@ usb3_hub_5v: regulator-usb3-hub-5v {
 		regulator-name = "USB30_HUB";
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
+		vin-supply = <&reg_vcc5v0_sys>;
 		gpio = <&gpio K1_GPIO(123) GPIO_ACTIVE_HIGH>;
 		enable-active-high;
 	};
-- 
2.50.1

[PATCH v2 2/4] riscv: dts: spacemit: k1-bananapi-f3: Update USB regulator on onboard usb and label

[Anand Moon]

Update the USB regulator labels to align with the board schematics and
power hierarchy. This change renames the regulator to reg_5v_vbus and
its name to 5V_VBUS. Additionally, it fixes the vdd-supply references
for both the USB 2.0 and 3.0 hub nodes to ensure they correctly point
to the 5V_VBUS input source as per the board schematics.

Cc: Han Gao <gaohan@iscas.ac.cn>
Cc: Ze Huang <huang.ze@linux.dev>
Cc: Chukun Pan <amadeus@jmu.edu.cn>
Signed-off-by: Anand Moon <linux.amoon@gmail.com>
---
 arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
index 9727ecdd9f6b..c35f4763c800 100644
--- a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
@@ -70,9 +70,9 @@ reg_vcc_4v: regulator-vcc-4v {
 		vin-supply = <&reg_dc_in>;
 	};
 
-	regulator-usb3-vbus-5v {
+	reg_5v_vbus: regulator-usb3-vbus-5v {
 		compatible = "regulator-fixed";
-		regulator-name = "USB30_VBUS";
+		regulator-name = "5V_VBUS";
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
 		regulator-always-on;
@@ -366,7 +366,7 @@ &usb_dwc3 {
 	hub_2_0: hub@1 {
 		compatible = "usb2109,2817";
 		reg = <0x1>;
-		vdd-supply = <&usb3_hub_5v>;
+		vdd-supply = <&reg_5v_vbus>;
 		peer-hub = <&hub_3_0>;
 		reset-gpios = <&gpio K1_GPIO(124) GPIO_ACTIVE_LOW>;
 	};
@@ -374,7 +374,7 @@ hub_2_0: hub@1 {
 	hub_3_0: hub@2 {
 		compatible = "usb2109,817";
 		reg = <0x2>;
-		vdd-supply = <&usb3_hub_5v>;
+		vdd-supply = <&reg_5v_vbus>;
 		peer-hub = <&hub_2_0>;
 		reset-gpios = <&gpio K1_GPIO(124) GPIO_ACTIVE_LOW>;
 	};
-- 
2.50.1

[PATCH v2 3/4] riscv: dts: spacemit: k1-bananapi-f3: Correct USB hub power hierarchy

[Anand Moon]

Link the usb3_hub_5v regulator to the USB controller’s vbus-supply to
ensure the USB 3.0 stack is properly powered as per the schematics.
In addition, align the USB hub regulator with the board schematics
by renaming it to VCC5V0_HUB and marking it as regulator-always-on
to maintain power stability.

Cc: Han Gao <gaohan@iscas.ac.cn>
Cc: Ze Huang <huang.ze@linux.dev>
Cc: Chukun Pan <amadeus@jmu.edu.cn>
Signed-off-by: Anand Moon <linux.amoon@gmail.com>
---
 arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
index c35f4763c800..3dbdf53b6d8e 100644
--- a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
@@ -83,9 +83,10 @@ reg_5v_vbus: regulator-usb3-vbus-5v {
 
 	usb3_hub_5v: regulator-usb3-hub-5v {
 		compatible = "regulator-fixed";
-		regulator-name = "USB30_HUB";
+		regulator-name = "VCC5V0_HUB";
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
 		vin-supply = <&reg_vcc5v0_sys>;
 		gpio = <&gpio K1_GPIO(123) GPIO_ACTIVE_HIGH>;
 		enable-active-high;
@@ -361,6 +362,7 @@ &usb_dwc3 {
 	dr_mode = "host";
 	#address-cells = <1>;
 	#size-cells = <0>;
+	vbus-supply = <&usb3_hub_5v>;
 	status = "okay";
 
 	hub_2_0: hub@1 {
-- 
2.50.1

[PATCH v2 4/4] riscv: dts: spacemit: k1-bananapi-f3: Add vin-supply for PCIe 3.3V regulator

[Anand Moon]

The PCIe 3.3V fixed regulator node (pcie_vcc_3v3) lacked a parent
supply reference. Wire it to the 5V system rail (reg_vcc5v0_sys)
via the vin-supply property to reflect the actual board power tree.
This ensures correct regulator hierarchy in DTS and allows drivers
to resolve supply dependencies cleanly during probe.

Cc: Han Gao <gaohan@iscas.ac.cn>
Cc: Ze Huang <huang.ze@linux.dev>
Cc: Chukun Pan <amadeus@jmu.edu.cn>
Signed-off-by: Anand Moon <linux.amoon@gmail.com>
---
v2: new patch in this series.
---
 arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
index 3dbdf53b6d8e..6c06480ba100 100644
--- a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
@@ -39,6 +39,7 @@ pcie_vcc_3v3: regulator-pcie-vcc3v3 {
 		regulator-min-microvolt = <3300000>;
 		regulator-max-microvolt = <3300000>;
 		regulator-always-on;
+		vin-supply = <&reg_vcc5v0_sys>;
 	};
 
 	reg_dc_in: regulator-dc-in-12v {
-- 
2.50.1