Merge tag 'staging-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging and IIO updates from Greg KH:
 "Here is the big staging/iio driver patches for 5.6-rc1

  Included in here are:

   - lots of new IIO drivers and updates for that subsystem

   - the usual huge quantity of minor cleanups for staging drivers

   - removal of the following staging drivers:
       - isdn/avm
       - isdn/gigaset
       - isdn/hysdn
       - octeon-usb
       - octeon ethernet

  Overall we deleted far more lines than we added, removing over 40k of
  old and obsolete driver code.

  All of these changes have been in linux-next for a while with no
  reported issues"

* tag 'staging-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (353 commits)
  staging: most: usb: check for NULL device
  staging: next: configfs: fix release link
  staging: most: core: fix logging messages
  staging: most: core: remove container struct
  staging: most: remove struct device core driver
  staging: most: core: drop device reference
  staging: most: remove device from interface structure
  staging: comedi: drivers: fix spelling mistake "to" -> "too"
  staging: exfat: remove fs_func struct.
  staging: wilc1000: avoid mutex unlock without lock in wilc_wlan_handle_txq()
  staging: wilc1000: return zero on success and non-zero on function failure
  staging: axis-fifo: replace spinlock with mutex
  staging: wilc1000: remove unused code prior to throughput enhancement in SPI
  staging: wilc1000: added 'wilc_' prefix for 'struct assoc_resp' name
  staging: wilc1000: move firmware API struct's to separate header file
  staging: wilc1000: remove use of infinite loop conditions
  staging: kpc2000: rename variables with kpc namespace
  staging: vt6656: Remove memory buffer from vnt_download_firmware.
  staging: vt6656: Just check NEWRSR_DECRYPTOK for RX_FLAG_DECRYPTED.
  staging: vt6656: Use vnt_rx_tail struct for tail variables.
  ...

1 files changed, 51 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/iio/proximity/parallax-ping.yaml b/Documentation/devicetree/bindings/iio/proximity/parallax-ping.yaml
new file mode 100644
index 000000000000..a079c9921af6
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/proximity/parallax-ping.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/proximity/parallax-ping.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Parallax PING))) and LaserPING range finder
+
+maintainers:
+  - Andreas Klinger <ak@it-klinger.de>
+
+description: |
+  Bit-banging driver using one GPIO:
+  - ping-gpios is raised by the driver to start measurement
+  - direction of ping-gpio is then switched into input with an interrupt
+    for receiving distance value as PWM signal
+
+  Specifications about the devices can be found at:
+  http://parallax.com/sites/default/files/downloads/28041-LaserPING-2m-Rangefinder-Guide.pdf
+  http://parallax.com/sites/default/files/downloads/28015-PING-Documentation-v1.6.pdf
+
+properties:
+  compatible:
+    enum:
+      - parallax,ping
+      - parallax,laserping
+
+  ping-gpios:
+    description:
+      Definition of the GPIO for the triggering and echo (output and input)
+      This GPIO is set for about 5 us by the driver to tell the device it
+      should initiate the measurement cycle. Afterwards the GPIO is switched
+      to input direction with an interrupt. The device sets it and the
+      length of the input signal corresponds to the measured distance.
+      It needs to be an GPIO which is able to deliver an interrupt because
+      the time between two interrupts is measured in the driver.
+      See Documentation/devicetree/bindings/gpio/gpio.txt for information
+      on how to specify a consumer gpio.
+    maxItems: 1
+
+required:
+  - compatible
+  - ping-gpios
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    proximity {
+        compatible = "parallax,laserping";
+        ping-gpios = <&gpio0 26 GPIO_ACTIVE_HIGH>;
+    };