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These devices connect to a host via > I3C/I2C/SMBus and allow communication with multiple downstream > peripherals. > > Signed-off-by: Aman Kumar Pandey > Signed-off-by: Vikash Bansal > Signed-off-by: Lakshay Piplani > Reviewed-by: Rob Herring (Arm) Reviewed-by: Frank Li > > --- > Changes in v11: > - No change > > Changes in v10: > - No change, added Reviewed-By tag > > Changes in v9: > - Referenced i3c.yaml and i2c-controller.yaml for child nodes > - Dropped unnecessary #address-cells and #size-cells from child nodes > > Changes in v8: > - Add compatible in i3c example > > 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 | 291 ++++++++++++++++++ > MAINTAINERS | 9 + > 2 files changed, 300 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..c080eeb0eeaa > --- /dev/null > +++ b/Documentation/devicetree/bindings/i3c/nxp,p3h2840.yaml > @@ -0,0 +1,291 @@ > +# 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 > + - Vikash Bansal > + - Lakshay Piplani > + > +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 > + $ref: /schemas/i3c/i3c.yaml# > + unevaluatedProperties: false > + > + properties: > + reg: > + description: > + The I3C HUB Target Port number. > + maximum: 7 > + > + nxp,pullup-enable: > + type: boolean > + description: > + Enables the on-die pull-up for Target Port. > + > + required: > + - reg > + > + "^(i2c|smbus)@[0-7]$": > + type: object > + $ref: /schemas/i2c/i2c-controller.yaml# > + unevaluatedProperties: false > + > + properties: > + reg: > + description: > + The I3C HUB Target Port number. > + maximum: 7 > + > + nxp,pullup-enable: > + type: boolean > + description: > + Enables the on-die pull-up for Target Port. > + > + required: > + - reg > + > +unevaluatedProperties: false > + > +examples: > + - | > + i3c { > + #address-cells = <3>; > + #size-cells = <0>; > + > + hub@70,236153000c2 { > + reg = <0x70 0x236 0x3000c2>; > + compatible = "nxp,p3h2840"; > + #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 c2c6d79275c6..ba65ae5a008b 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -19303,6 +19303,15 @@ 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 > +M: Aman Kumar Pandey > +M: Lakshay Piplani > +L: linux-kernel@vger.kernel.org > +L: linux-i3c@lists.infradead.org > +S: Maintained > +F: Documentation/devicetree/bindings/i3c/nxp,p3h2840.yaml > + > NXP PF5300/PF5301/PF5302 PMIC REGULATOR DEVICE DRIVER > M: Woodrow Douglass > S: Maintained > -- > 2.25.1 >