| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/iio/pressure/honeywell,mprls0025pa.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Honeywell mprls0025pa pressure sensor |
| 8 | |
| 9 | maintainers: |
| 10 | - Andreas Klinger <ak@it-klinger.de> |
| 11 | |
| 12 | description: | |
| 13 | Honeywell pressure sensor of model mprls0025pa. |
| 14 | |
| 15 | This sensor has an I2C and SPI interface. Only the I2C interface is |
| 16 | implemented. |
| 17 | |
| 18 | There are many models with different pressure ranges available. The vendor |
| 19 | calls them "mpr series". All of them have the identical programming model and |
| 20 | differ in the pressure range, unit and transfer function. |
| 21 | |
| 22 | To support different models one need to specify the pressure range as well as |
| 23 | the transfer function. Pressure range needs to be converted from its unit to |
| 24 | pascal. |
| 25 | |
| 26 | The transfer function defines the ranges of numerical values delivered by the |
| 27 | sensor. The minimal range value stands for the minimum pressure and the |
| 28 | maximum value also for the maximum pressure with linear relation inside the |
| 29 | range. |
| 30 | |
| 31 | Specifications about the devices can be found at: |
| 32 | https://prod-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/ |
| 33 | products/sensors/pressure-sensors/board-mount-pressure-sensors/ |
| 34 | micropressure-mpr-series/documents/ |
| 35 | sps-siot-mpr-series-datasheet-32332628-ciid-172626.pdf |
| 36 | |
| 37 | properties: |
| 38 | compatible: |
| 39 | const: honeywell,mprls0025pa |
| 40 | |
| 41 | reg: |
| 42 | maxItems: 1 |
| 43 | |
| 44 | interrupts: |
| 45 | maxItems: 1 |
| 46 | |
| 47 | reset-gpios: |
| 48 | description: |
| 49 | Optional GPIO for resetting the device. |
| 50 | If not present the device is not reset during the probe. |
| 51 | maxItems: 1 |
| 52 | |
| 53 | honeywell,pmin-pascal: |
| 54 | description: |
| 55 | Minimum pressure value the sensor can measure in pascal. |
| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 56 | |
| 57 | honeywell,pmax-pascal: |
| 58 | description: |
| 59 | Maximum pressure value the sensor can measure in pascal. |
| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 60 | |
| 61 | honeywell,transfer-function: |
| 62 | description: | |
| 63 | Transfer function which defines the range of valid values delivered by the |
| 64 | sensor. |
| 65 | 1 - A, 10% to 90% of 2^24 (1677722 .. 15099494) |
| 66 | 2 - B, 2.5% to 22.5% of 2^24 (419430 .. 3774874) |
| 67 | 3 - C, 20% to 80% of 2^24 (3355443 .. 13421773) |
| 68 | $ref: /schemas/types.yaml#/definitions/uint32 |
| 69 | |
| 70 | vdd-supply: |
| 71 | description: provide VDD power to the sensor. |
| 72 | |
| 73 | required: |
| 74 | - compatible |
| 75 | - reg |
| 76 | - honeywell,pmin-pascal |
| 77 | - honeywell,pmax-pascal |
| 78 | - honeywell,transfer-function |
| 79 | - vdd-supply |
| 80 | |
| 81 | additionalProperties: false |
| 82 | |
| 83 | examples: |
| 84 | - | |
| 85 | #include <dt-bindings/gpio/gpio.h> |
| 86 | #include <dt-bindings/interrupt-controller/irq.h> |
| 87 | i2c { |
| 88 | #address-cells = <1>; |
| 89 | #size-cells = <0>; |
| 90 | |
| 91 | pressure@18 { |
| 92 | compatible = "honeywell,mprls0025pa"; |
| 93 | reg = <0x18>; |
| 94 | reset-gpios = <&gpio3 19 GPIO_ACTIVE_HIGH>; |
| 95 | interrupt-parent = <&gpio3>; |
| 96 | interrupts = <21 IRQ_TYPE_EDGE_FALLING>; |
| 97 | honeywell,pmin-pascal = <0>; |
| 98 | honeywell,pmax-pascal = <172369>; |
| 99 | honeywell,transfer-function = <1>; |
| 100 | vdd-supply = <&vcc_3v3>; |
| 101 | }; |
| 102 | }; |