Add TI INA4230, which is a 48V 4-channel 16-bit I2C-based
current/voltage/power/energy monitor with alert function.
Link: https://www.ti.com/product/INA4230
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Alexey Charkov <alchark@flipper.net>
---
.../devicetree/bindings/hwmon/ti,ina4230.yaml | 130 +++++++++++++++++++++
MAINTAINERS | 6 +
2 files changed, 136 insertions(+)
diff --git a/Documentation/devicetree/bindings/hwmon/ti,ina4230.yaml b/Documentation/devicetree/bindings/hwmon/ti,ina4230.yaml
new file mode 100644
index 000000000000..69839e7a3197
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/ti,ina4230.yaml
@@ -0,0 +1,130 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/ti,ina4230.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments INA4230 quad-channel power monitors
+
+maintainers:
+ - Alexey Charkov <alchark@flipper.net>
+
+description: |
+ The INA4230 is a 48V quad-channel 16-bit current, voltage, power and energy
+ monitor with an I2C interface.
+
+ Datasheet:
+ https://www.ti.com/product/INA4230
+
+properties:
+ compatible:
+ enum:
+ - ti,ina4230
+
+ reg:
+ maxItems: 1
+
+ "#address-cells":
+ description: Required only if a child node is present.
+ const: 1
+
+ "#size-cells":
+ description: Required only if a child node is present.
+ const: 0
+
+ vs-supply:
+ description: phandle to the regulator that provides the VS supply typically
+ in range from 1.7 V to 5.5 V.
+
+ ti,alert-polarity-active-high:
+ description: Alert pin is asserted based on the value of Alert polarity Bit
+ of the CONFIG2 register. Default value is 0, for which the alert pin
+ toggles from high to low during faults. When this property is set, the
+ corresponding register bit is set to 1, and the alert pin toggles from
+ low to high during faults.
+ $ref: /schemas/types.yaml#/definitions/flag
+
+patternProperties:
+ "^input@[0-3]$":
+ description: The node contains optional child nodes for four channels.
+ Each child node describes the information of input source. Input channels
+ default to enabled in the chip. Unless channels are explicitly disabled
+ in device-tree, input channels will be enabled.
+ type: object
+ additionalProperties: false
+ properties:
+ reg:
+ description: Must be 0, 1, 2 or 3, corresponding to the IN1, IN2, IN3
+ or IN4 ports of the INA4230, respectively.
+ enum: [ 0, 1, 2, 3 ]
+
+ label:
+ description: name of the input source
+
+ shunt-resistor-micro-ohms:
+ description: shunt resistor value in micro-Ohm
+
+ ti,maximum-expected-current-microamp:
+ description: |
+ This value indicates the maximum current in microamps that you can
+ expect to measure with ina4230 in your circuit.
+
+ This value will be used to calculate the Current_LSB and current/power
+ coefficient for the pmbus and to calibrate the IC.
+ minimum: 32768
+ maximum: 4294967295
+ default: 32768000
+
+ required:
+ - reg
+
+required:
+ - compatible
+ - reg
+
+allOf:
+ - $ref: hwmon-common.yaml#
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ power-sensor@44 {
+ compatible = "ti,ina4230";
+ reg = <0x44>;
+ vs-supply = <&vdd_3v0>;
+ ti,alert-polarity-active-high;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ input@0 {
+ reg = <0x0>;
+ /*
+ * Input channels are enabled by default in the device and so
+ * to disable, must be explicitly disabled in device-tree.
+ */
+ status = "disabled";
+ };
+
+ input@1 {
+ reg = <0x1>;
+ shunt-resistor-micro-ohms = <50000>;
+ ti,maximum-expected-current-microamp = <300000>;
+ };
+
+ input@2 {
+ reg = <0x2>;
+ label = "VDD_5V";
+ shunt-resistor-micro-ohms = <10000>;
+ ti,maximum-expected-current-microamp = <5000000>;
+ };
+
+ input@3 {
+ reg = <0x3>;
+ };
+ };
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index 4d879f6a7b51..bc6f1836bcb1 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -12511,6 +12511,12 @@ S: Maintained
F: Documentation/hwmon/ina233.rst
F: drivers/hwmon/pmbus/ina233.c
+INA4230 HWMON DRIVER
+M: Alexey Charkov <alchark@flipper.net>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/hwmon/ti,ina4230.yaml
+
INDEX OF FURTHER KERNEL DOCUMENTATION
M: Carlos Bilbao <carlos.bilbao@kernel.org>
S: Maintained
--
2.52.0On 3/2/26 02:55, Alexey Charkov wrote: > Add TI INA4230, which is a 48V 4-channel 16-bit I2C-based > current/voltage/power/energy monitor with alert function. > > Link: https://www.ti.com/product/INA4230 > Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com> > Signed-off-by: Alexey Charkov <alchark@flipper.net> > --- > .../devicetree/bindings/hwmon/ti,ina4230.yaml | 130 +++++++++++++++++++++ > MAINTAINERS | 6 + > 2 files changed, 136 insertions(+) > > diff --git a/Documentation/devicetree/bindings/hwmon/ti,ina4230.yaml b/Documentation/devicetree/bindings/hwmon/ti,ina4230.yaml > new file mode 100644 > index 000000000000..69839e7a3197 ... > + ti,maximum-expected-current-microamp: > + description: | > + This value indicates the maximum current in microamps that you can > + expect to measure with ina4230 in your circuit. > + > + This value will be used to calculate the Current_LSB and current/power > + coefficient for the pmbus and to calibrate the IC. pmbus ? Is this a typo or cut-and-paste error ? This is not a PMBus chip. Thanks, Guenter
On Sun, Mar 8, 2026 at 9:46 PM Guenter Roeck <linux@roeck-us.net> wrote: > > On 3/2/26 02:55, Alexey Charkov wrote: > > Add TI INA4230, which is a 48V 4-channel 16-bit I2C-based > > current/voltage/power/energy monitor with alert function. > > > > Link: https://www.ti.com/product/INA4230 > > Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com> > > Signed-off-by: Alexey Charkov <alchark@flipper.net> > > --- > > .../devicetree/bindings/hwmon/ti,ina4230.yaml | 130 +++++++++++++++++++++ > > MAINTAINERS | 6 + > > 2 files changed, 136 insertions(+) > > > > diff --git a/Documentation/devicetree/bindings/hwmon/ti,ina4230.yaml b/Documentation/devicetree/bindings/hwmon/ti,ina4230.yaml > > new file mode 100644 > > index 000000000000..69839e7a3197 > ... > > + ti,maximum-expected-current-microamp: > > + description: | > > + This value indicates the maximum current in microamps that you can > > + expect to measure with ina4230 in your circuit. > > + > > + This value will be used to calculate the Current_LSB and current/power > > + coefficient for the pmbus and to calibrate the IC. > > pmbus ? Is this a typo or cut-and-paste error ? This is not a PMBus chip. Indeed, cut-and-paste from ina3221 which I used as the basis for making this one. Thanks for spotting, will fix in the next version. Perhaps it should say this instead: This value will be used to calculate the Current_LSB to maximize available precision while ensuring your expected maximum current fits within the chip's ADC range. It will also enable built-in shunt gain to increase ADC granularity by a factor of 4 if the provided maximum current / shunt resistance combination does not produce more than 20.48 mV drop at the shunt. Best regards, Alexey
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