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Diffstat (limited to 'Documentation/devicetree/bindings/iio/pressure/honeywell,mprls0025pa.yaml')
| -rw-r--r-- | Documentation/devicetree/bindings/iio/pressure/honeywell,mprls0025pa.yaml | 98 |
1 files changed, 77 insertions, 21 deletions
diff --git a/Documentation/devicetree/bindings/iio/pressure/honeywell,mprls0025pa.yaml b/Documentation/devicetree/bindings/iio/pressure/honeywell,mprls0025pa.yaml index d9e903fbfd..6994b30015 100644 --- a/Documentation/devicetree/bindings/iio/pressure/honeywell,mprls0025pa.yaml +++ b/Documentation/devicetree/bindings/iio/pressure/honeywell,mprls0025pa.yaml @@ -8,25 +8,28 @@ title: Honeywell mprls0025pa pressure sensor maintainers: - Andreas Klinger <ak@it-klinger.de> + - Petre Rodan <petre.rodan@subdimension.ro> description: | Honeywell pressure sensor of model mprls0025pa. - This sensor has an I2C and SPI interface. Only the I2C interface is - implemented. + This sensor has an I2C and SPI interface. 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. + 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/ @@ -42,6 +45,10 @@ properties: maxItems: 1 interrupts: + description: + Optional interrupt for indicating End-of-conversion. + If not present, the driver loops for a while until the received status + byte indicates correct measurement. maxItems: 1 reset-gpios: @@ -50,14 +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 @@ -65,19 +64,57 @@ properties: 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) + 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. + + spi-max-frequency: + maximum: 800000 + 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: + - $ref: /schemas/spi/spi-peripheral-props.yaml + - if: + required: + - honeywell,pressure-triplet + then: + properties: + honeywell,pmin-pascal: false + honeywell,pmax-pascal: false + additionalProperties: false examples: @@ -93,10 +130,29 @@ examples: 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>; + interrupts = <21 IRQ_TYPE_EDGE_RISING>; + + honeywell,pressure-triplet = "0025PA"; + honeywell,transfer-function = <1>; + vdd-supply = <&vcc_3v3>; + }; + }; + - | + spi { + #address-cells = <1>; + #size-cells = <0>; + + pressure@0 { + compatible = "honeywell,mprls0025pa"; + reg = <0>; + spi-max-frequency = <800000>; + reset-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>; + interrupt-parent = <&gpio0>; + interrupts = <30 IRQ_TYPE_EDGE_RISING>; + + honeywell,pressure-triplet = "0015PA"; honeywell,transfer-function = <1>; vdd-supply = <&vcc_3v3>; }; }; +... |