From: Aman Kumar Pandey <redacted>

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 <redacted>
Signed-off-by: Vikash Bansal <redacted>

---
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>;