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