From: Aman Kumar Pandey <aman.kumarpandey@nxp.com>
Add bindings for the NXP P3H2x4x (P3H2440/P3H2441/P3H2840/P3H2841)
multiport I3C hub family. These devices connect to a host via
I3C/I2C/SMBus and allow communication with multiple downstream
peripherals.
Signed-off-by: Aman Kumar Pandey <aman.kumarpandey@nxp.com>
Signed-off-by: Vikash Bansal <vikash.bansal@nxp.com>
---
Changes in v7:
- Fix schema validation issues
- Adjust required properties
- Add I2C example
Changes in v6:
- Use a vendor prefix for the attributes
Changes in v5:
- Removed SW properties: cp0-ldo-microvolt,cp1-ldo-microvolt,
tp0145-ldo-microvolt, tp2367-ldo-microvolt
- Changed supply entries and its descriptions
Changes in v4:
- Fixed DT binding check warning
- Removed SW properties: ibi-enable, local-dev, and always-enable
Changes in v3:
- Added MFD (Multi-Function Device) support for I3C hub and on-die regulator
- Added Regulator supply node
Changes in v2:
- Fixed DT binding check warning
- Revised logic for parsing DTS nodes
---
---
.../devicetree/bindings/i3c/nxp,p3h2840.yaml | 303 ++++++++++++++++++
MAINTAINERS | 8 +
2 files changed, 311 insertions(+)
create mode 100644 Documentation/devicetree/bindings/i3c/nxp,p3h2840.yaml
diff --git a/Documentation/devicetree/bindings/i3c/nxp,p3h2840.yaml b/Documentation/devicetree/bindings/i3c/nxp,p3h2840.yaml
new file mode 100644
index 000000000000..495e0e4c1ae1
--- /dev/null
+++ b/Documentation/devicetree/bindings/i3c/nxp,p3h2840.yaml
@@ -0,0 +1,303 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright 2025 NXP
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i3c/nxp,p3h2840.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP P3H2X4X I3C HUB
+
+maintainers:
+ - Aman Kumar Pandey <aman.kumarpandey@nxp.com>
+ - Vikash Bansal <vikash.bansal@nxp.com>
+
+description: |
+ P3H2x4x (P3H2440/P3H2441/P3H2840/P3H2841) is a family of multiport I3C
+ hub devices that connect to:-
+ 1. A host CPU via I3C/I2C/SMBus bus on upstream side and connect to multiple
+ peripheral devices on the downstream side.
+ 2. Have two Controller Ports which can support either
+ I2C/SMBus or I3C buses and connect to a CPU, BMC or SOC.
+ 3. P3H2840/ P3H2841 are 8 port I3C hub with eight I3C/I2C Target Port.
+ 4. P3H2440/ P3H2441 are 4 port I3C hub with four I3C/I2C Target Port.
+ Target ports can be configured as I2C/SMBus, I3C or GPIO and connect to
+ peripherals.
+
+properties:
+ compatible:
+ const: nxp,p3h2840
+
+ reg:
+ maxItems: 1
+
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ assigned-address:
+ maximum: 0x7f
+
+ nxp,tp0145-pullup-ohms:
+ description:
+ Selects the pull up resistance for target Port 0/1/4/5, in ohms.
+ enum: [250, 500, 1000, 2000]
+ default: 500
+
+ nxp,tp2367-pullup-ohms:
+ description:
+ Selects the pull up resistance for target Port 2/3/6/7, in ohms.
+ enum: [250, 500, 1000, 2000]
+ default: 500
+
+ nxp,cp0-io-strength-ohms:
+ description:
+ Selects the IO drive strength for controller Port 0, in ohms.
+ enum: [20, 30, 40, 50]
+ default: 20
+
+ nxp,cp1-io-strength-ohms:
+ description:
+ Selects the IO drive strength for controller Port 1, in ohms.
+ enum: [20, 30, 40, 50]
+ default: 20
+
+ nxp,tp0145-io-strength-ohms:
+ description:
+ Selects the IO drive strength for target port 0/1/4/5, in ohms.
+ enum: [20, 30, 40, 50]
+ default: 20
+
+ nxp,tp2367-io-strength-ohms:
+ description:
+ Selects the IO drive strength for target port 2/3/6/7, in ohms.
+ enum: [20, 30, 40, 50]
+ default: 20
+
+ vcc1-supply:
+ description: Controller port 0 power supply.
+
+ vcc2-supply:
+ description: Controller port 1 power supply.
+
+ vcc3-supply:
+ description: Target port 0/1/4/5 power supply.
+
+ vcc4-supply:
+ description: Target port 2/3/6/7 power supply.
+
+ regulators:
+ type: object
+ additionalProperties: false
+
+ properties:
+ ldo-cp0:
+ type: object
+ $ref: /schemas/regulator/regulator.yaml#
+ unevaluatedProperties: false
+
+ ldo-cp1:
+ type: object
+ $ref: /schemas/regulator/regulator.yaml#
+ unevaluatedProperties: false
+
+ ldo-tpg0:
+ type: object
+ $ref: /schemas/regulator/regulator.yaml#
+ unevaluatedProperties: false
+
+ ldo-tpg1:
+ type: object
+ $ref: /schemas/regulator/regulator.yaml#
+ unevaluatedProperties: false
+
+required:
+ - reg
+
+patternProperties:
+ "^i3c@[0-7]$":
+ type: object
+ unevaluatedProperties: false
+
+ properties:
+ reg:
+ description:
+ The I3C HUB Target Port number.
+ maximum: 7
+
+ '#address-cells':
+ const: 3
+
+ '#size-cells':
+ const: 0
+
+ nxp,pullup-enable:
+ type: boolean
+ description:
+ Enables the on-die pull-up for Target Port.
+
+ required:
+ - reg
+ - "#address-cells"
+ - "#size-cells"
+
+ "^(i2c|smbus)@[0-7]$":
+ type: object
+ unevaluatedProperties: false
+
+ properties:
+ reg:
+ description:
+ The I3C HUB Target Port number.
+ maximum: 7
+
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ nxp,pullup-enable:
+ type: boolean
+ description:
+ Enables the on-die pull-up for Target Port.
+
+ required:
+ - reg
+ - "#address-cells"
+ - "#size-cells"
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ i3c {
+ #address-cells = <3>;
+ #size-cells = <0>;
+
+ hub@70,236153000c2 {
+ reg = <0x70 0x236 0x3000c2>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ assigned-address = <0x50>;
+
+ nxp,tp0145-pullup-ohms = <1000>;
+ nxp,tp2367-pullup-ohms = <1000>;
+ nxp,cp0-io-strength-ohms = <50>;
+ nxp,cp1-io-strength-ohms = <50>;
+ nxp,tp0145-io-strength-ohms = <50>;
+ nxp,tp2367-io-strength-ohms = <50>;
+ vcc3-supply = <®_tpg0>;
+ vcc4-supply = <®_tpg1>;
+
+ regulators {
+ reg_cp0: ldo-cp0 {
+ regulator-name = "ldo-cp0";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ reg_cp1: ldo-cp1 {
+ regulator-name = "ldo-cp1";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ reg_tpg0: ldo-tpg0 {
+ regulator-name = "ldo-tpg0";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ reg_tpg1: ldo-tpg1 {
+ regulator-name = "ldo-tpg1";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+ };
+
+ smbus@0 {
+ reg = <0x0>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ nxp,pullup-enable;
+ };
+
+ i2c@1 {
+ reg = <0x1>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ nxp,pullup-enable;
+ };
+
+ i3c@2 {
+ reg = <0x2>;
+ #address-cells = <3>;
+ #size-cells = <0>;
+ nxp,pullup-enable;
+ };
+ };
+ };
+
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ hub@70 {
+ reg = <0x70>;
+ compatible = "nxp,p3h2840";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ nxp,tp0145-pullup-ohms = <1000>;
+ nxp,tp2367-pullup-ohms = <1000>;
+ nxp,cp0-io-strength-ohms = <50>;
+ nxp,cp1-io-strength-ohms = <50>;
+ nxp,tp0145-io-strength-ohms = <50>;
+ nxp,tp2367-io-strength-ohms = <50>;
+ vcc3-supply = <®_tpg0_i2c>;
+ vcc4-supply = <®_tpg1_i2c>;
+
+ regulators {
+ reg_cp0_i2c: ldo-cp0 {
+ regulator-name = "ldo-cp0";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ reg_cp1_i2c: ldo-cp1 {
+ regulator-name = "ldo-cp1";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ reg_tpg0_i2c: ldo-tpg0 {
+ regulator-name = "ldo-tpg0";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ reg_tpg1_i2c: ldo-tpg1 {
+ regulator-name = "ldo-tpg1";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+ };
+
+ smbus@0 {
+ reg = <0x0>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ nxp,pullup-enable;
+ };
+
+ i2c@1 {
+ reg = <0x1>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ nxp,pullup-enable;
+ };
+ };
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index 96ea84948d76..c72976dbdf31 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -19094,6 +19094,14 @@ S: Maintained
F: Documentation/devicetree/bindings/ptp/nxp,ptp-netc.yaml
F: drivers/ptp/ptp_netc.c
+NXP P3H2X4X I3C-HUB DRIVER
+M: Vikash Bansal <vikash.bansal@nxp.com>
+M: Aman Kumar Pandey <aman.kumarpandey@nxp.com>
+L: linux-kernel@vger.kernel.org
+L: linux-i3c-owner@lists.infradead.org
+S: Maintained
+F: Documentation/devicetree/bindings/i3c/nxp,p3h2840.yaml
+
NXP PF5300/PF5301/PF5302 PMIC REGULATOR DEVICE DRIVER
M: Woodrow Douglass <wdouglass@carnegierobotics.com>
S: Maintained
--
2.25.1On Thu, Mar 19, 2026 at 04:54:37PM +0530, Lakshay Piplani wrote:
> From: Aman Kumar Pandey <aman.kumarpandey@nxp.com>
>
> Add bindings for the NXP P3H2x4x (P3H2440/P3H2441/P3H2840/P3H2841)
> multiport I3C hub family. These devices connect to a host via
> I3C/I2C/SMBus and allow communication with multiple downstream
> peripherals.
>
> Signed-off-by: Aman Kumar Pandey <aman.kumarpandey@nxp.com>
> Signed-off-by: Vikash Bansal <vikash.bansal@nxp.com>
>
> ---
> Changes in v7:
> - Fix schema validation issues
> - Adjust required properties
> - Add I2C example
>
> Changes in v6:
> - Use a vendor prefix for the attributes
>
> Changes in v5:
> - Removed SW properties: cp0-ldo-microvolt,cp1-ldo-microvolt,
> tp0145-ldo-microvolt, tp2367-ldo-microvolt
> - Changed supply entries and its descriptions
>
> Changes in v4:
> - Fixed DT binding check warning
> - Removed SW properties: ibi-enable, local-dev, and always-enable
>
> Changes in v3:
> - Added MFD (Multi-Function Device) support for I3C hub and on-die regulator
> - Added Regulator supply node
>
> Changes in v2:
> - Fixed DT binding check warning
> - Revised logic for parsing DTS nodes
> ---
> ---
> .../devicetree/bindings/i3c/nxp,p3h2840.yaml | 303 ++++++++++++++++++
> MAINTAINERS | 8 +
> 2 files changed, 311 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/i3c/nxp,p3h2840.yaml
>
> diff --git a/Documentation/devicetree/bindings/i3c/nxp,p3h2840.yaml b/Documentation/devicetree/bindings/i3c/nxp,p3h2840.yaml
> new file mode 100644
> index 000000000000..495e0e4c1ae1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/i3c/nxp,p3h2840.yaml
> @@ -0,0 +1,303 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright 2025 NXP
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/i3c/nxp,p3h2840.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: NXP P3H2X4X I3C HUB
> +
> +maintainers:
> + - Aman Kumar Pandey <aman.kumarpandey@nxp.com>
> + - Vikash Bansal <vikash.bansal@nxp.com>
> +
> +description: |
> + P3H2x4x (P3H2440/P3H2441/P3H2840/P3H2841) is a family of multiport I3C
> + hub devices that connect to:-
> + 1. A host CPU via I3C/I2C/SMBus bus on upstream side and connect to multiple
> + peripheral devices on the downstream side.
> + 2. Have two Controller Ports which can support either
> + I2C/SMBus or I3C buses and connect to a CPU, BMC or SOC.
> + 3. P3H2840/ P3H2841 are 8 port I3C hub with eight I3C/I2C Target Port.
> + 4. P3H2440/ P3H2441 are 4 port I3C hub with four I3C/I2C Target Port.
> + Target ports can be configured as I2C/SMBus, I3C or GPIO and connect to
> + peripherals.
> +
> +properties:
> + compatible:
> + const: nxp,p3h2840
> +
> + reg:
> + maxItems: 1
> +
> + '#address-cells':
> + const: 1
> +
> + '#size-cells':
> + const: 0
> +
> + assigned-address:
> + maximum: 0x7f
> +
> + nxp,tp0145-pullup-ohms:
> + description:
> + Selects the pull up resistance for target Port 0/1/4/5, in ohms.
> + enum: [250, 500, 1000, 2000]
> + default: 500
> +
> + nxp,tp2367-pullup-ohms:
> + description:
> + Selects the pull up resistance for target Port 2/3/6/7, in ohms.
> + enum: [250, 500, 1000, 2000]
> + default: 500
> +
> + nxp,cp0-io-strength-ohms:
> + description:
> + Selects the IO drive strength for controller Port 0, in ohms.
> + enum: [20, 30, 40, 50]
> + default: 20
> +
> + nxp,cp1-io-strength-ohms:
> + description:
> + Selects the IO drive strength for controller Port 1, in ohms.
> + enum: [20, 30, 40, 50]
> + default: 20
> +
> + nxp,tp0145-io-strength-ohms:
> + description:
> + Selects the IO drive strength for target port 0/1/4/5, in ohms.
> + enum: [20, 30, 40, 50]
> + default: 20
> +
> + nxp,tp2367-io-strength-ohms:
> + description:
> + Selects the IO drive strength for target port 2/3/6/7, in ohms.
> + enum: [20, 30, 40, 50]
> + default: 20
> +
> + vcc1-supply:
> + description: Controller port 0 power supply.
> +
> + vcc2-supply:
> + description: Controller port 1 power supply.
> +
> + vcc3-supply:
> + description: Target port 0/1/4/5 power supply.
> +
> + vcc4-supply:
> + description: Target port 2/3/6/7 power supply.
> +
> + regulators:
> + type: object
> + additionalProperties: false
> +
> + properties:
> + ldo-cp0:
> + type: object
> + $ref: /schemas/regulator/regulator.yaml#
> + unevaluatedProperties: false
> +
> + ldo-cp1:
> + type: object
> + $ref: /schemas/regulator/regulator.yaml#
> + unevaluatedProperties: false
> +
> + ldo-tpg0:
> + type: object
> + $ref: /schemas/regulator/regulator.yaml#
> + unevaluatedProperties: false
> +
> + ldo-tpg1:
> + type: object
> + $ref: /schemas/regulator/regulator.yaml#
> + unevaluatedProperties: false
> +
> +required:
> + - reg
> +
> +patternProperties:
> + "^i3c@[0-7]$":
> + type: object
> + unevaluatedProperties: false
> +
> + properties:
> + reg:
> + description:
> + The I3C HUB Target Port number.
> + maximum: 7
> +
> + '#address-cells':
> + const: 3
> +
> + '#size-cells':
> + const: 0
> +
> + nxp,pullup-enable:
> + type: boolean
> + description:
> + Enables the on-die pull-up for Target Port.
> +
> + required:
> + - reg
> + - "#address-cells"
> + - "#size-cells"
> +
> + "^(i2c|smbus)@[0-7]$":
> + type: object
> + unevaluatedProperties: false
> +
> + properties:
> + reg:
> + description:
> + The I3C HUB Target Port number.
> + maximum: 7
> +
> + '#address-cells':
> + const: 1
> +
> + '#size-cells':
> + const: 0
> +
> + nxp,pullup-enable:
> + type: boolean
> + description:
> + Enables the on-die pull-up for Target Port.
> +
> + required:
> + - reg
> + - "#address-cells"
> + - "#size-cells"
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + i3c {
> + #address-cells = <3>;
> + #size-cells = <0>;
> +
> + hub@70,236153000c2 {
> + reg = <0x70 0x236 0x3000c2>;
Once again, you must have a compatible. "The device is discoverable" is
not an argument. If it is discoverable, then don't put the device in DT
in the first place.
Rob
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