cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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devantech-srf04.yaml (2598B)

      1# SPDX-License-Identifier: GPL-2.0
      2%YAML 1.2
      3---
      4$id: http://devicetree.org/schemas/iio/proximity/devantech-srf04.yaml#
      5$schema: http://devicetree.org/meta-schemas/core.yaml#
      6
      7title: Devantech SRF04 and Maxbotix mb1000 ultrasonic range finder
      8
      9maintainers:
     10  - Andreas Klinger <ak@it-klinger.de>
     11
     12description: |
     13  Bit-banging driver using two GPIOs:
     14  - trigger-gpio is raised by the driver to start sending out an ultrasonic
     15    burst
     16  - echo-gpio is held high by the sensor after sending ultrasonic burst
     17    until it is received once again
     18
     19  Specifications about the devices can be found at:
     20  https://www.robot-electronics.co.uk/htm/srf04tech.htm
     21
     22  https://www.maxbotix.com/documents/LV-MaxSonar-EZ_Datasheet.pdf
     23
     24properties:
     25  compatible:
     26    enum:
     27      - devantech,srf04
     28      - maxbotix,mb1000
     29      - maxbotix,mb1010
     30      - maxbotix,mb1020
     31      - maxbotix,mb1030
     32      - maxbotix,mb1040
     33
     34  trig-gpios:
     35    description:
     36      Definition of the GPIO for the triggering (output)
     37      This GPIO is set for about 10 us by the driver to tell the device it
     38      should initiate the measurement cycle.
     39      See Documentation/devicetree/bindings/gpio/gpio.txt for information
     40      on how to specify a consumer gpio.
     41    maxItems: 1
     42
     43  echo-gpios:
     44    description:
     45      Definition of the GPIO for the echo (input)
     46      This GPIO is set by the device as soon as an ultrasonic burst is sent
     47      out and reset when the first echo is received.
     48      Thus this GPIO is set while the ultrasonic waves are doing one round
     49      trip.
     50      It needs to be an GPIO which is able to deliver an interrupt because
     51      the time between two interrupts is measured in the driver.
     52    maxItems: 1
     53
     54  power-gpios:
     55    description:
     56      Definition of the GPIO for power management of connected peripheral
     57      (output).
     58      This GPIO can be used by the external hardware for power management.
     59      When the device gets suspended it's switched off and when it resumes
     60      it's switched on again. After some period of inactivity the driver
     61      get suspended automatically (autosuspend feature).
     62    maxItems: 1
     63
     64  startup-time-ms:
     65    description:
     66      This is the startup time the device needs after a resume to be up and
     67      running.
     68    minimum: 0
     69    maximum: 1000
     70    default: 100
     71
     72required:
     73  - compatible
     74  - trig-gpios
     75  - echo-gpios
     76
     77additionalProperties: false
     78
     79examples:
     80  - |
     81    #include <dt-bindings/gpio/gpio.h>
     82    proximity {
     83        compatible = "devantech,srf04";
     84        trig-gpios = <&gpio1 15 GPIO_ACTIVE_HIGH>;
     85        echo-gpios = <&gpio2  6 GPIO_ACTIVE_HIGH>;
     86    };