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Message-Id: <20260113114529.1692213-2-aman.kumarpandey@nxp.com>
Date: Tue, 13 Jan 2026 13:45:26 +0200
From: Aman Kumar Pandey <aman.kumarpandey@....com>
To: linux-kernel@...r.kernel.org,
linux-i3c@...ts.infradead.org,
alexandre.belloni@...tlin.com,
krzk+dt@...nel.org,
robh@...nel.org,
conor+dt@...nel.org,
devicetree@...r.kernel.org,
broonie@...nel.org,
lee@...nel.org,
Frank.Li@....com,
lgirdwood@...il.com
Cc: vikash.bansal@....com,
priyanka.jain@....com,
shashank.rebbapragada@....com,
Aman Kumar Pandey <aman.kumarpandey@....com>
Subject: [PATCH v4 2/5] dt-bindings: i3c: Add NXP P3H2x4x i3c-hub support
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@....com>
Signed-off-by: Vikash Bansal <vikash.bansal@....com>
---
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
---
---
.../bindings/mfd/nxp,p3h2840-i3c-hub.yaml | 240 ++++++++++++++++++
MAINTAINERS | 8 +
2 files changed, 248 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mfd/nxp,p3h2840-i3c-hub.yaml
diff --git a/Documentation/devicetree/bindings/mfd/nxp,p3h2840-i3c-hub.yaml b/Documentation/devicetree/bindings/mfd/nxp,p3h2840-i3c-hub.yaml
new file mode 100644
index 000000000000..b6853a1d1893
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/nxp,p3h2840-i3c-hub.yaml
@@ -0,0 +1,240 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright 2025 NXP
+
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/nxp,p3h2840-i3c-hub.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP P3H2X4X I3C HUB
+
+maintainers:
+ - Aman Kumar Pandey <aman.kumarpandey@....com>
+ - Vikash Bansal <vikash.bansal@....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.
+
+allOf:
+ - $ref: /schemas/i3c/i3c.yaml#
+
+properties:
+ compatible:
+ items:
+ - const: nxp,p3h2840
+
+ cp0-ldo-microvolt:
+ description:
+ Selects the voltage for controller Port 0, in microvolts.
+ enum: [1000000, 1100000, 1200000, 1800000]
+ default: 1000000
+
+ cp1-ldo-microvolt:
+ description:
+ Selects the voltage for controller Port 1, in microvolts.
+ enum: [1000000, 1100000, 1200000, 1800000]
+ default: 1000000
+
+ tp0145-ldo-microvolt:
+ description:
+ Selects the voltage for target Port 0/1/4/5, in microvolts.
+ enum: [1000000, 1100000, 1200000, 1800000]
+ default: 1000000
+
+ tp2367-ldo-microvolt:
+ description:
+ Selects the voltage for target Port 2/3/6/7, in microvolts.
+ enum: [1000000, 1100000, 1200000, 1800000]
+ default: 1000000
+
+ 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
+
+ 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
+
+ cp0-io-strength-ohms:
+ description:
+ Selects the IO drive strength for controller Port 0, in ohms.
+ enum: [20, 30, 40, 50]
+ default: 20
+
+ cp1-io-strength-ohms:
+ description:
+ Selects the IO drive strength for controller Port 1, in ohms.
+ enum: [20, 30, 40, 50]
+ default: 20
+
+ 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
+
+ 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
+
+ cp0-supply:
+ description: Phandle to voltage regulator providing power to controller port 0.
+
+ cp1-supply:
+ description: Phandle to voltage regulator providing power to controller port 1.
+
+ tp0145-supply:
+ description: Phandle to voltage regulator providing power to target port 0/1/4/5.
+
+ tp2367-supply:
+ description: Phandle to voltage regulator providing power to target port 2/3/6/7.
+
+ regulators:
+ type: object
+ additionalProperties: false
+
+ properties:
+ cp0:
+ type: object
+ $ref: /schemas/regulator/regulator.yaml#
+ unevaluatedProperties: false
+
+ cp1:
+ type: object
+ $ref: /schemas/regulator/regulator.yaml#
+ unevaluatedProperties: false
+
+ tp0145:
+ type: object
+ $ref: /schemas/regulator/regulator.yaml#
+ unevaluatedProperties: false
+
+ tp2367:
+ type: object
+ $ref: /schemas/regulator/regulator.yaml#
+ unevaluatedProperties: false
+
+patternProperties:
+ "^i3c@[0-7]$":
+ type: object
+ $ref: /schemas/i3c/i3c.yaml#
+ unevaluatedProperties: false
+
+ properties:
+ reg:
+ description:
+ The I3C HUB Target Port number.
+ maxItems: 1
+
+ pullup-enable:
+ type: boolean
+ description:
+ Enables the on-die pull-up for Target Port.
+
+ "^(i2c|smbus)@[0-7]$":
+ type: object
+ $ref: /schemas/i2c/i2c-controller.yaml#
+ unevaluatedProperties: false
+
+ properties:
+ reg:
+ description:
+ The I3C HUB Target Port number.
+ maxItems: 1
+
+ pullup-enable:
+ type: boolean
+ description:
+ Enables the on-die pull-up for Target Port.
+
+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>;
+
+ cp0-ldo-microvolt = <1800000>;
+ cp1-ldo-microvolt = <1800000>;
+ tp0145-ldo-microvolt = <1800000>;
+ tp2367-ldo-microvolt = <1800000>;
+ tp0145-pullup-ohm = <1000>;
+ tp2367-pullup-ohm = <1000>;
+ cp0-io-strength-ohm = <50>;
+ cp1-io-strength-ohm = <50>;
+ tp0145-io-strength-ohm = <50>;
+ tp2367-io-strength-ohm = <50>;
+ cp0-supply = <&cp0>;
+ tp0145-supply = <&tp0145>;
+ tp2367-supply = <&tp2367>;
+
+ regulators {
+ cp0 {
+ regulator-name = "cp0";
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ cp1 {
+ regulator-name = "cp1";
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ tp0145 {
+ regulator-name = "tp0145";
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ tp2367 {
+ regulator-name = "tp2367";
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1800000>;
+ };
+ };
+
+ smbus@0 {
+ reg = <0x0>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ pullup-enable;
+ };
+
+ i2c@1 {
+ reg = <0x1>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ pullup-enable;
+ };
+
+ i3c@2 {
+ reg = <0x2>;
+ #address-cells = <3>;
+ #size-cells = <0>;
+ pullup-enable;
+ };
+ };
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index 0d044a58cbfe..03a66efbcc4c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18924,6 +18924,14 @@ S: Maintained
F: Documentation/devicetree/bindings/extcon/extcon-ptn5150.yaml
F: drivers/extcon/extcon-ptn5150.c
+NXP P3H2X4X I3C-HUB DRIVER
+M: Vikash Bansal <vikash.bansal@....com>
+M: Aman Kumar Pandey <aman.kumarpandey@....com>
+L: linux-kernel@...r.kernel.org
+L: linux-i3c-owner@...ts.infradead.org
+S: Maintained
+F: Documentation/devicetree/bindings/mfd/nxp,p3h2840-i3c-hub.yaml
+
NXP SGTL5000 DRIVER
M: Fabio Estevam <festevam@...il.com>
L: linux-sound@...r.kernel.org
--
2.25.1
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