Similar to SX9310, add biddings to setup sx9324 hardware properties. SX9324 is a little different, introduce 4 phases to be configured in 2 pairs over 3 antennas. Signed-off-by: Gwendal Grignou <gwendal@xxxxxxxxxxxx> --- Changes in v4: - Use const instead of single enum - Specify ph0-pin better - Recopy type information for phX-pin - Fix cut and paste errors. Changes in v3: - Remove duplicate information. - Use intervals instead of enum. - Fix filter description. Changes in v2: - Fix interrupt documentation wording. .../iio/proximity/semtech,sx9324.yaml | 161 ++++++++++++++++++ 1 file changed, 161 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/proximity/semtech,sx9324.yaml diff --git a/Documentation/devicetree/bindings/iio/proximity/semtech,sx9324.yaml b/Documentation/devicetree/bindings/iio/proximity/semtech,sx9324.yaml new file mode 100644 index 00000000000000..70e4736fb1cc9a --- /dev/null +++ b/Documentation/devicetree/bindings/iio/proximity/semtech,sx9324.yaml @@ -0,0 +1,161 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/proximity/semtech,sx9324.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Semtech's SX9324 capacitive proximity sensor + +maintainers: + - Gwendal Grignou <gwendal@xxxxxxxxxxxx> + - Daniel Campello <campello@xxxxxxxxxxxx> + +description: | + Semtech's SX9324 proximity sensor. + +properties: + compatible: + const: semtech,sx9324 + + reg: + maxItems: 1 + + interrupts: + description: + Generated by device to announce preceding read request has finished + and data is available or that a close/far proximity event has happened. + maxItems: 1 + + vdd-supply: + description: Main power supply + + svdd-supply: + description: Host interface power supply + + "#io-channel-cells": + const: 1 + + semtech,ph0-pin: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: | + Array of 3 entries. Index represent the id of the CS pin. + Value indicates how each CS pin is used during phase 0. + Each of the 3 pins have the following value - + 0 : unused (high impedance) + 1 : measured input + 2 : dynamic shield + 3 : grounded. + For instance, CS0 measured, CS1 shield and CS2 ground is [1, 2, 3] + items: + enum: [ 0, 1, 2, 3 ] + minItems: 3 + maxItems: 3 + + semtech,ph1-pin: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: Same as ph0-pin for phase 1. + items: + enum: [ 0, 1, 2, 3 ] + minItems: 3 + maxItems: 3 + + semtech,ph2-pin: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: Same as ph0-pin for phase 2. + items: + enum: [ 0, 1, 2, 3 ] + minItems: 3 + maxItems: 3 + + semtech,ph3-pin: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: Same as ph0-pin for phase 3. + items: + enum: [ 0, 1, 2, 3 ] + minItems: 3 + maxItems: 3 + + + semtech,resolution01: + $ref: /schemas/types.yaml#definitions/uint32 + enum: [8, 16, 32, 64, 128, 256, 512, 1024] + description: + Capacitance measurement resolution. For phase 0 and 1. + Higher the number, higher the resolution. + default: 128 + + semtech,resolution23: + $ref: /schemas/types.yaml#definitions/uint32 + enum: [8, 16, 32, 64, 128, 256, 512, 1024] + description: + Capacitance measurement resolution. For phase 2 and 3 + default: 128 + + semtech,startup-sensor: + $ref: /schemas/types.yaml#definitions/uint32 + enum: [0, 1, 2, 3] + default: 0 + description: | + Phase used for start-up proximity detection. + It is used when we enable a phase to remove static offset and measure + only capacitance changes introduced by the user. + + semtech,proxraw-strength01: + $ref: /schemas/types.yaml#definitions/uint32 + min: 0 + max: 7 + default: 1 + description: + PROXRAW filter strength for phase 0 and 1. A value of 0 represents off, + and other values represent 1-1/2^N. + + semtech,proxraw-strength23: + $ref: /schemas/types.yaml#definitions/uint32 + min: 0 + max: 7 + default: 1 + description: + Same as proxraw-strength01, for phase 2 and 3. + + semtech,avg-pos-strength: + $ref: /schemas/types.yaml#definitions/uint32 + enum: [0, 16, 64, 128, 256, 512, 1024, 4294967295] + default: 16 + description: | + Average positive filter strength. A value of 0 represents off and + UINT_MAX (4294967295) represents infinite. Other values + represent 1-1/N. + +required: + - compatible + - reg + - "#io-channel-cells" + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/irq.h> + i2c { + #address-cells = <1>; + #size-cells = <0>; + proximity@28 { + compatible = "semtech,sx9324"; + reg = <0x28>; + interrupt-parent = <&pio>; + interrupts = <5 IRQ_TYPE_LEVEL_LOW 5>; + vdd-supply = <&pp3300_a>; + svdd-supply = <&pp1800_prox>; + #io-channel-cells = <1>; + semtech,ph0-pin = <1, 2, 3>; + semtech,ph1-pin = <3, 2, 1>; + semtech,ph2-pin = <1, 2, 3>; + semtech,ph3-pin = <3, 2, 1>; + semtech,resolution01 = 2; + semtech,resolution23 = 2; + semtech,startup-sensor = <1>; + semtech,proxraw-strength01 = <2>; + semtech,proxraw-strength23 = <2>; + semtech,avg-pos-strength = <64>; + }; + }; -- 2.34.0.rc2.393.gf8c9666880-goog
