linux-kernel - [PATCH v2 1/2] dt-bindings: adc: provide max34408/9 device tree binding document

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Message-ID: <20230929200844.23316-2-fr0st61te@gmail.com>
Date:   Fri, 29 Sep 2023 23:08:43 +0300
From:   Ivan Mikhaylov <fr0st61te@...il.com>
To:     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>
Cc:     linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Ivan Mikhaylov <fr0st61te@...il.com>
Subject: [PATCH v2 1/2] dt-bindings: adc: provide max34408/9 device tree binding document

The hardware binding for i2c current monitoring device with overcurrent
control.

Signed-off-by: Ivan Mikhaylov <fr0st61te@...il.com>
---
 .../bindings/iio/adc/maxim,max34408.yaml      | 101 ++++++++++++++++++
 1 file changed, 101 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..cdf89fa4c80e
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/maxim,max34408.yaml
@@ -0,0 +1,101 @@
+# 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 <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
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  maxim,input1-rsense-val-micro-ohms:
+    description:
+      Adjust the Rsense value to monitor higher or lower current levels for
+      input 1.
+    enum: [250, 500, 1000, 5000, 10000, 50000, 100000, 200000, 500000]
+    default: 1000
+
+  maxim,input2-rsense-val-micro-ohms:
+    description:
+      Adjust the Rsense value to monitor higher or lower current levels for
+      input 2.
+    enum: [250, 500, 1000, 5000, 10000, 50000, 100000, 200000, 500000]
+    default: 1000
+
+  maxim,input3-rsense-val-micro-ohms:
+    description:
+      Adjust the Rsense value to monitor higher or lower current levels for
+      input 3.
+    enum: [250, 500, 1000, 5000, 10000, 50000, 100000, 200000, 500000]
+    default: 1000
+
+  maxim,input4-rsense-val-micro-ohms:
+    description:
+      Adjust the Rsense value to monitor higher or lower current levels for
+      input 4.
+    enum: [250, 500, 1000, 5000, 10000, 50000, 100000, 200000, 500000]
+    default: 1000
+
+  maxim,shtdn:
+    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.
+    type: boolean
+
+  maxim,ena:
+    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.
+    type: boolean
+
+  supply-vdd: true
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        adc@1e {
+              compatible = "maxim,max34409";
+              reg = <0x1e>;
+              maxim,input1-rsense-val-micro-ohms = <5000>;
+              maxim,input2-rsense-val-micro-ohms = <10000>;
+        };
+    };
-- 
2.42.0