@@ -19,14 +19,17 @@ description: |
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.
+ To support different models one need to specify its pressure triplet as well
+ as the transfer function.
+
+ For custom silicon chips not covered by the Honeywell MPR series datasheet,
+ the pressure values can be specified manually via honeywell,pmin-pascal and
+ honeywell,pmax-pascal.
+ The minimal range value stands for the minimum pressure and the maximum value
+ also for the maximum pressure with linear relation inside the range.
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.
+ sensor.
Specifications about the devices can be found at:
https://prod-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/
@@ -54,14 +57,6 @@ properties:
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.
-
- honeywell,pmax-pascal:
- description:
- Maximum pressure value the sensor can measure in pascal.
-
honeywell,transfer-function:
description: |
Transfer function which defines the range of valid values delivered by the
@@ -72,17 +67,50 @@ properties:
enum: [1, 2, 3]
$ref: /schemas/types.yaml#/definitions/uint32
+ honeywell,pressure-triplet:
+ description: |
+ Case-sensitive five character string that defines pressure range, unit
+ and type as part of the device nomenclature. In the unlikely case of a
+ custom chip, unset and provide pmin-pascal and pmax-pascal instead.
+ enum: [0001BA, 01.6BA, 02.5BA, 0060MG, 0100MG, 0160MG, 0250MG, 0400MG,
+ 0600MG, 0001BG, 01.6BG, 02.5BG, 0100KA, 0160KA, 0250KA, 0006KG,
+ 0010KG, 0016KG, 0025KG, 0040KG, 0060KG, 0100KG, 0160KG, 0250KG,
+ 0015PA, 0025PA, 0030PA, 0001PG, 0005PG, 0015PG, 0030PG, 0300YG]
+ $ref: /schemas/types.yaml#/definitions/string
+
+ honeywell,pmin-pascal:
+ description:
+ Minimum pressure value the sensor can measure in pascal.
+
+ honeywell,pmax-pascal:
+ description:
+ Maximum pressure value the sensor can measure in pascal.
+
vdd-supply:
description: provide VDD power to the sensor.
required:
- compatible
- reg
- - honeywell,pmin-pascal
- - honeywell,pmax-pascal
- honeywell,transfer-function
- vdd-supply
+oneOf:
+ - required:
+ - honeywell,pressure-triplet
+ - required:
+ - honeywell,pmin-pascal
+ - honeywell,pmax-pascal
+
+allOf:
+ - if:
+ required:
+ - honeywell,pressure-triplet
+ then:
+ properties:
+ honeywell,pmin-pascal: false
+ honeywell,pmax-pascal: false
+
additionalProperties: false
examples:
@@ -99,8 +127,8 @@ examples:
reset-gpios = <&gpio3 19 GPIO_ACTIVE_HIGH>;
interrupt-parent = <&gpio3>;
interrupts = <21 IRQ_TYPE_EDGE_RISING>;
- honeywell,pmin-pascal = <0>;
- honeywell,pmax-pascal = <172369>;
+
+ honeywell,pressure-triplet = "0025PA";
honeywell,transfer-function = <1>;
vdd-supply = <&vcc_3v3>;
};