The hardware binding for i2c current monitoring device with overcurrent
control.
Signed-off-by: Ivan Mikhaylov <[email protected]>
---
.../bindings/iio/adc/maxim,max34408.yaml | 137 ++++++++++++++++++
1 file changed, 137 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/adc/maxim,max34408.yaml
diff --git a/Documentation/devicetree/bindings/iio/adc/maxim,max34408.yaml b/Documentation/devicetree/bindings/iio/adc/maxim,max34408.yaml
new file mode 100644
index 000000000000..4262bedb4bfa
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/maxim,max34408.yaml
@@ -0,0 +1,137 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/maxim,max34408.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Two- and four-channel current monitors with overcurrent control
+
+maintainers:
+ - Ivan Mikhaylov <[email protected]>
+
+description: |
+ The MAX34408/MAX34409 are two- and four-channel current monitors that are
+ configured and monitored with a standard I2C/SMBus serial interface. Each
+ unidirectional current sensor offers precision high-side operation with a
+ low full-scale sense voltage. The devices automatically sequence through
+ two or four channels and collect the current-sense samples and average them
+ to reduce the effect of impulse noise. The raw ADC samples are compared to
+ user-programmable digital thresholds to indicate overcurrent conditions.
+ Overcurrent conditions trigger a hardware output to provide an immediate
+ indication to shut down any necessary external circuitry.
+
+ Specifications about the devices can be found at:
+ https://www.analog.com/media/en/technical-documentation/data-sheets/MAX34408-MAX34409.pdf
+
+properties:
+ compatible:
+ enum:
+ - maxim,max34408
+ - maxim,max34409
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ shutdown-gpios:
+ description:
+ Shutdown Output. Open-drain output. This output transitions to high impedance
+ when any of the digital comparator thresholds are exceeded as long as the ENA
+ pin is high.
+ maxItems: 1
+
+ shtdn-enable-gpios:
+ description:
+ SHTDN Enable Input. CMOS digital input. Connect to GND to clear the latch and
+ unconditionally deassert (force low) the SHTDN output and reset the shutdown
+ delay. Connect to VDD to enable normal latch operation of the SHTDN output.
+ maxItems: 1
+
+ vdd-supply: true
+
+required:
+ - compatible
+ - reg
+
+patternProperties:
+ "^channel@[0-3]$":
+ $ref: adc.yaml
+ type: object
+ description:
+ Represents the internal channels of the ADC.
+
+ properties:
+ reg:
+ items:
+ minimum: 0
+ maximum: 3
+
+ maxim,rsense-val-micro-ohms:
+ description:
+ Adjust the Rsense value to monitor higher or lower current levels for
+ input.
+ enum: [250, 500, 1000, 5000, 10000, 50000, 100000, 200000, 500000]
+ default: 1000
+
+ required:
+ - reg
+ - maxim,rsense-val-micro-ohms
+
+ unevaluatedProperties: false
+
+allOf:
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: maxim,max34408
+ then:
+ patternProperties:
+ "^channel@[2-3]$": false
+ "^channel@[0-1]$":
+ properties:
+ reg:
+ minimum: 0
+ maximum: 1
+ else:
+ patternProperties:
+ "^channel@[0-3]$":
+ properties:
+ reg:
+ minimum: 0
+ maximum: 3
+
+additionalProperties: false
+
+examples:
+ - |
+ i2c {
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ adc@1e {
+ compatible = "maxim,max34409";
+ reg = <0x1e>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+ channel@0 {
+ reg = <0x0>;
+ maxim,rsense-val-micro-ohms = <5000>;
+ };
+
+ channel@1 {
+ reg = <0x1>;
+ maxim,rsense-val-micro-ohms = <10000>;
+ };
+ };
+ };
--
2.42.0
On 05/10/2023 20:55, Ivan Mikhaylov wrote:
> The hardware binding for i2c current monitoring device with overcurrent
> control.
>
> Signed-off-by: Ivan Mikhaylov <[email protected]>
> ---
> .../bindings/iio/adc/maxim,max34408.yaml | 137 ++++++++++++++++++
> 1 file changed, 137 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/iio/adc/maxim,max34408.yaml
>
> diff --git a/Documentation/devicetree/bindings/iio/adc/maxim,max34408.yaml b/Documentation/devicetree/bindings/iio/adc/maxim,max34408.yaml
> new file mode 100644
> index 000000000000..4262bedb4bfa
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/maxim,max34408.yaml
> @@ -0,0 +1,137 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/adc/maxim,max34408.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Two- and four-channel current monitors with overcurrent control
> +
> +maintainers:
> + - Ivan Mikhaylov <[email protected]>
> +
> +description: |
> + The MAX34408/MAX34409 are two- and four-channel current monitors that are
> + configured and monitored with a standard I2C/SMBus serial interface. Each
> + unidirectional current sensor offers precision high-side operation with a
> + low full-scale sense voltage. The devices automatically sequence through
> + two or four channels and collect the current-sense samples and average them
> + to reduce the effect of impulse noise. The raw ADC samples are compared to
> + user-programmable digital thresholds to indicate overcurrent conditions.
> + Overcurrent conditions trigger a hardware output to provide an immediate
> + indication to shut down any necessary external circuitry.
> +
> + Specifications about the devices can be found at:
> + https://www.analog.com/media/en/technical-documentation/data-sheets/MAX34408-MAX34409.pdf
> +
> +properties:
> + compatible:
> + enum:
> + - maxim,max34408
> + - maxim,max34409
> +
> + "#address-cells":
> + const: 1
> +
> + "#size-cells":
> + const: 0
> +
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> + shutdown-gpios:
> + description:
> + Shutdown Output. Open-drain output. This output transitions to high impedance
> + when any of the digital comparator thresholds are exceeded as long as the ENA
> + pin is high.
> + maxItems: 1
> +
> + shtdn-enable-gpios:
Are these both GPIOs different than standard powerdown-gpios? I suspect
one is different, but the other should be the same. If both are
different, use different names. shutdown gpios is the same as powerdown
gpios....
> + description:
> + SHTDN Enable Input. CMOS digital input. Connect to GND to clear the latch and
> + unconditionally deassert (force low) the SHTDN output and reset the shutdown
> + delay. Connect to VDD to enable normal latch operation of the SHTDN output.
> + maxItems: 1
> +
> + vdd-supply: true
> +
> +required:
> + - compatible
> + - reg
required goes after patternProperties.
> +
> +patternProperties:
> + "^channel@[0-3]$":
> + $ref: adc.yaml
> + type: object
> + description:
> + Represents the internal channels of the ADC.
> +
> + properties:
> + reg:
> + items:
> + minimum: 0
> + maximum: 3
> +
> + maxim,rsense-val-micro-ohms:
> + description:
> + Adjust the Rsense value to monitor higher or lower current levels for
> + input.
> + enum: [250, 500, 1000, 5000, 10000, 50000, 100000, 200000, 500000]
> + default: 1000
> +
> + required:
> + - reg
> + - maxim,rsense-val-micro-ohms
> +
> + unevaluatedProperties: false
> +
> +allOf:
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: maxim,max34408
> + then:
> + patternProperties:
> + "^channel@[2-3]$": false
> + "^channel@[0-1]$":
> + properties:
> + reg:
> + minimum: 0
> + maximum: 1
> + else:
> + patternProperties:
> + "^channel@[0-3]$":
> + properties:
> + reg:
> + minimum: 0
> + maximum: 3
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + i2c {
> +
Stray blank line.
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + adc@1e {
> + compatible = "maxim,max34409";
> + reg = <0x1e>;
> +
> + #address-cells = <1>;
> + #size-cells = <0>;
Missing blank line
Extend example with GPIOs to make it as complete as reasonable/possible.
Best regards,
Krzysztof