103 lines
3.0 KiB
YAML
103 lines
3.0 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/iio/pressure/honeywell,mprls0025pa.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Honeywell mprls0025pa pressure sensor
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maintainers:
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- Andreas Klinger <ak@it-klinger.de>
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description: |
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Honeywell pressure sensor of model mprls0025pa.
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This sensor has an I2C and SPI interface. Only the I2C interface is
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implemented.
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There are many models with different pressure ranges available. The vendor
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calls them "mpr series". All of them have the identical programming model and
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differ in the pressure range, unit and transfer function.
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To support different models one need to specify the pressure range as well as
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the transfer function. Pressure range needs to be converted from its unit to
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pascal.
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The transfer function defines the ranges of numerical values delivered by the
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sensor. The minimal range value stands for the minimum pressure and the
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maximum value also for the maximum pressure with linear relation inside the
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range.
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Specifications about the devices can be found at:
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https://prod-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/
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products/sensors/pressure-sensors/board-mount-pressure-sensors/
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micropressure-mpr-series/documents/
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sps-siot-mpr-series-datasheet-32332628-ciid-172626.pdf
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properties:
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compatible:
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const: honeywell,mprls0025pa
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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reset-gpios:
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description:
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Optional GPIO for resetting the device.
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If not present the device is not reset during the probe.
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maxItems: 1
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honeywell,pmin-pascal:
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description:
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Minimum pressure value the sensor can measure in pascal.
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honeywell,pmax-pascal:
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description:
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Maximum pressure value the sensor can measure in pascal.
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honeywell,transfer-function:
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description: |
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Transfer function which defines the range of valid values delivered by the
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sensor.
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1 - A, 10% to 90% of 2^24 (1677722 .. 15099494)
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2 - B, 2.5% to 22.5% of 2^24 (419430 .. 3774874)
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3 - C, 20% to 80% of 2^24 (3355443 .. 13421773)
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$ref: /schemas/types.yaml#/definitions/uint32
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vdd-supply:
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description: provide VDD power to the sensor.
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required:
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- compatible
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- reg
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- honeywell,pmin-pascal
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- honeywell,pmax-pascal
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- honeywell,transfer-function
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- vdd-supply
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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pressure@18 {
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compatible = "honeywell,mprls0025pa";
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reg = <0x18>;
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reset-gpios = <&gpio3 19 GPIO_ACTIVE_HIGH>;
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interrupt-parent = <&gpio3>;
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interrupts = <21 IRQ_TYPE_EDGE_FALLING>;
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honeywell,pmin-pascal = <0>;
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honeywell,pmax-pascal = <172369>;
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honeywell,transfer-function = <1>;
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vdd-supply = <&vcc_3v3>;
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};
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};
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