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Message-ID: <20231018-basket-pelt-1cac6a6926d0@spud>
Date: Wed, 18 Oct 2023 16:37:35 +0100
From: Conor Dooley <conor@...nel.org>
To: Ivan Mikhaylov <fr0st61te@...il.com>
Cc: Jonathan Cameron <jic23@...nel.org>,
Lars-Peter Clausen <lars@...afoo.de>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>, linux-iio@...r.kernel.org,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v6 1/2] dt-bindings: adc: provide max34408/9 device tree
binding document
On Sun, Oct 15, 2023 at 12:12:53AM +0300, Ivan Mikhaylov wrote:
> The hardware binding for i2c current monitoring device with overcurrent
> control.
>
> Signed-off-by: Ivan Mikhaylov <fr0st61te@...il.com>
It looks as if the comments on the property names & the conditionals
from previous versions have been resolved.
Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
Thanks,
Conor.
> ---
> .../bindings/iio/adc/maxim,max34408.yaml | 139 ++++++++++++++++++
> 1 file changed, 139 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..4cba856e8d47
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/maxim,max34408.yaml
> @@ -0,0 +1,139 @@
> +# 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: Maxim MAX34408/MAX34409 current monitors with overcurrent control
> +
> +maintainers:
> + - Ivan Mikhaylov <fr0st61te@...il.com>
> +
> +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
> +
> + powerdown-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
> +
> + powerdown-status-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
> +
> +patternProperties:
> + "^channel@[0-3]$":
> + $ref: adc.yaml
> + type: object
> + description:
> + Represents the internal channels of the ADC.
> +
> + properties:
> + reg:
> + items:
> + - minimum: 0
> + maximum: 3
> +
> + maxim,rsense-val-micro-ohms:
> + description:
> + Adjust the Rsense value to monitor higher or lower current levels for
> + input.
> + enum: [250, 500, 1000, 5000, 10000, 50000, 100000, 200000, 500000]
> + default: 1000
> +
> + required:
> + - reg
> + - maxim,rsense-val-micro-ohms
> +
> + unevaluatedProperties: false
> +
> +required:
> + - compatible
> + - reg
> +
> +allOf:
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: maxim,max34408
> + then:
> + patternProperties:
> + "^channel@[2-3]$": false
> + "^channel@[0-1]$":
> + properties:
> + reg:
> + maximum: 1
> + else:
> + patternProperties:
> + "^channel@[0-3]$":
> + properties:
> + reg:
> + maximum: 3
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/gpio/gpio.h>
> +
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + adc@1e {
> + compatible = "maxim,max34409";
> + reg = <0x1e>;
> + powerdown-gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
> + powerdown-status-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>;
> +
> + #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
>
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