Merge tag 'iio-for-6.10a' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-next

Jonathan writes:

IIO: 1st set of new device support, features and cleanup for 6.10

The Analog Device team (Paul Cercueil and Nuno Sa) have been working on
improving high speed device handling. They have had some support in their
own tree for many years, so it is great to see them bring it to upstream.
Some of that is seen here, with the first output device using the
IIO dmaengine infrastructure and a new DAC backend FPGA IP driver.
This makes use of a new set of interfaces to allow backend and
front end driver communication in a fashion that in theory at least
allows for a single driver for a given ADC / DAC independent of
the IP to which is being used to deal with the data bus and DMA aspects
of working with these devices. It is early days for this new
generic way of handling split devices, but as it's kernel internals only
we can merrily change anything about it as a wider diversity of devices
show up and we get a better feel for what works.

Alongside the usual set of new drivers and features we have
the automatic cleanup of fwnode_handle_put() which didn't quite make
it in last cycle. The equivalent DT version was merged by Rob Herring
via the DT binding tree and one patch using that in IIO can also be
found in this pull request. Rob has been making extensive use of that
infrastructure in the DT core which is good to see and provides more
evidence this basic approach is useful.

In some cases, the IIO driver was converted over from DT only to
using the generic firmware description handling of property.h
including using the new macros. The general preference for IIO
is to use this more generic handling where possible - a bunch of other
drivers have been converted this cycle as well.

New device support
==================

adi,ad7173
- New driver supporting AD7172-2, AD7172-4 AD7173-9, AD7175-2, AD7175-8,
  AD7176-2 and AD7177-2 ADCs.
- Follow up fix for an accidental use of logic not instead of bitwise.

adi,ad7944
- New driver supporting AD7944, AD7985 and AD7986 pin compatible ADCs.
- Later patch added use of new spi_optimize_message() to reduce overheads
  of setting up a reused message.
- Additional changes later in series reduced code duplication.

adi,ad9739a RF DAC
- New driver for this 14-bit 2.5 GSPS DAC via an LVDS interface.

adi,axi-dac
- Support for this FPGA IP used to send data to high performance DACs over
  an interface such as JESD204B/C or parallel interfaces.  Used in
  conjunction with a DAC driver. The initial user is the ad9739a.
  The dmaengine-buffer needed various changes to make it bidirectional.

avago,apds9306
- New driver for this ambient light sensor.
- Fix much later in this pull for an off by 1 error.

New device IDs
==============

For these at most an ID and a instance of chip specific data was needed.
Always nice to see manufacturers sticking to an existing software interface
for new parts.

allwinner,sun20i
- Add support for h616.
invensense,mpu6050
- Add support for ICM42688
maxim,max30102
- Add compatible for MAX30101
ti,dac5571
- Add compatible for DAC081C081

General
=======

fwnode_handle
- Support for cleanup.h based __free(fwnode_handle)
- Loop macro using this for looping over child nodes without needing to
  call fwnode_handle_put() in ever early exit from the loop.
- Used in:
  * adi,ad3552r
  * adi,ad4130
  * adi,ad5770r
  * adi,ad74413r
  * adi,ad7173
  * adi,adfm2000
  * linear,ltc2688
  * linear,ltc2983
  * maxim,max11410
  * microchip,pac1934
  * qcom,spmi-adc
  * renesas,rz2gl
  * st,ab8500
  * st,stm32 (Fix for failure to set return value precedes this patch,
    providing an example of why enabling direct returns makes bugs
    less likely)
- Conversions to fwnode also using the cleanup logic
  * adi,ad7124
  * adi,ad7292
  * freescale,fsl-imx25-gcq

- Other conversions to fwnode where the new cleanup handling isn't useful
  * adi,ad7192
  * avia,hx711
  * freescale,mma8452
  * nxp,fxls8962af
  * st,spear
  * ti,twl4030

Features
========

adi,adxl345
- Support SPI_3WIRE mode.

adi,ad9944
- Support 3-wire mode, note this isn't normal 3-wire SPI (unlike the
  adxl345 change above), but rather   a wiring scheme where the SPI
  chip select is used to trigger conversions rather than using a
  separate pin.
- Add some device specific documentation, mostly around the various wiring
  schemes.

invensense,mpu6050
- Add Wake on Motion support as an IIO event and as a wake-up source.

linear,ltc2983
- Add vdd-supply.

ti,hdc3020
- Add power management using trigger on demand mode and adding suspend and
  resume handling.
- Use reset GPIO if available.

Cleanup and fixes
================

iio core
- Use the various autocleanup and lock guards from cleanup.h to simplify
  the IIO core.
- Don't set the pointer used for iio_priv() if it is zero sized as that
  points beyond the end of the allocation. No driver actually uses it
  in that case but good to clean this up.

various drivers
- Drop unnecessary casts of other pointer types to void *

docs
- Add missing ABI entry for in_temp_input.

adi,adx345
- General cleanup prior to adding spi-3wire mode.

adi,axi-adc
- Be more flexible and allow minor version changes as these are expected
  to be backwards compatible.

avago,apds9300/9600
- Merge near identical bindings. The drivers are quite different, but
  the bindings can be shared. The apds9306 binding introduced in this
  series uses this shared binding doc as well.
- Add missing vdd-supply
- Update binding to use IRQ_TYPE_LEVEL_LOW instead of 8.

bosch,bmp280
- Organize headers

freescale,fxl-imx25-gcq
- Use devm_ for remaining probe() time setup allowing dropping
  of specific error handling and remove() functions.

infineon,dps310
- Fix handling of negative temperatures
- Bring style of other similar calls inline with the form needed
  for temperatures
- Ensure error handling of regmap calls is consistent within the driver.
- Simplify scale reading logic.

invensense,mpu6050
- Flip logic in binding to exclude devices without i2c-gate instead
  of opting in.  The list is expected to be much shorter as all recent
  devices support this feature.

honeywell,hsc030pa
- Use spi_read() instead of opening coding.

renesas,rcar
- Use device_for_each_child_of_node_scoped() to remove need to manually
  release. Left over from series the rest of which went in during 6.9.

st,ab8500
- Fix naming of function parameters in kernel-doc

* tag 'iio-for-6.10a' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (108 commits)
  iio: adc: ti-ads131e08: Use device_for_each_child_node_scoped() to simplify error paths.
  iio: adc: adi-axi-adc: only error out in major version mismatch
  iio: dac: support the ad9739a RF DAC
  iio: dac: add support for AXI DAC IP core
  iio: backend: add new functionality
  dt-bindings: iio: dac: add docs for AD9739A
  dt-bindings: iio: dac: add docs for AXI DAC IP
  iio: buffer-dmaengine: Enable write support
  iio: buffer-dmaengine: Support specifying buffer direction
  iio: buffer-dma: Enable buffer write support
  iio: buffer-dma: Rename iio_dma_buffer_data_available()
  iio: buffer-dma: add iio_dmaengine_buffer_setup()
  iio: pressure: dps310: simplify scale factor reading
  iio: pressure: dps310: consistently check return value of `regmap_read`
  iio: pressure: dps310: introduce consistent error handling
  iio: pressure: dps310: support negative temperature values
  dt-bindings: iio: adc: Add GPADC for Allwinner H616
  iio: dac: ad5755: make use of of_device_id table
  iio: imu: inv_icm42600: add support of ICM-42688-P
  dt-bindings: iio: imu: add icm42688 inside inv_icm42600
  ...

18 files changed, 853 insertions, 64 deletions

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 2e6d5ebfd3c7..7cee78ad4108 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -243,7 +243,8 @@ Description:
 		less measurements. Units after application of scale and offset
 		are milli degrees Celsius.
 
-What:		/sys/bus/iio/devices/iio:deviceX/in_tempX_input
+What:		/sys/bus/iio/devices/iio:deviceX/in_tempY_input
+What:		/sys/bus/iio/devices/iio:deviceX/in_temp_input
 KernelVersion:	2.6.38
 Contact:	linux-iio@vger.kernel.org
 Description:
diff --git a/Documentation/ABI/testing/sysfs-bus-iio-ad9739a b/Documentation/ABI/testing/sysfs-bus-iio-ad9739a
new file mode 100644
index 000000000000..ed59299e6f8d
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-iio-ad9739a
@@ -0,0 +1,19 @@
+What:		/sys/bus/iio/devices/iio:deviceX/out_voltageY_operating_mode
+KernelVersion:	6.9
+Contact:	linux-iio@vger.kernel.org
+Description:
+		DAC operating mode. One of the following modes can be selected:
+
+		* normal: This is DAC normal mode.
+		* mixed-mode: In this mode the output is effectively chopped at
+			      the DAC sample rate. This has the effect of
+			      reducing the power of the fundamental signal while
+			      increasing the power of the images centered around
+			      the DAC sample rate, thus improving the output
+			      power of these images.
+
+What:		/sys/bus/iio/devices/iio:deviceX/out_voltageY_operating_mode_available
+KernelVersion:	6.9
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Available operating modes.
diff --git a/Documentation/devicetree/bindings/iio/accel/adi,adxl345.yaml b/Documentation/devicetree/bindings/iio/accel/adi,adxl345.yaml
index 07cacc3f6a97..280ed479ef5a 100644
--- a/Documentation/devicetree/bindings/iio/accel/adi,adxl345.yaml
+++ b/Documentation/devicetree/bindings/iio/accel/adi,adxl345.yaml
@@ -32,6 +32,8 @@ properties:
 
   spi-cpol: true
 
+  spi-3wire: true
+
   interrupts:
     maxItems: 1
 
diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml
new file mode 100644
index 000000000000..ea6cfcd0aff4
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml
@@ -0,0 +1,279 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2023 Analog Devices Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/adi,ad7173.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD7173 ADC
+
+maintainers:
+  - Ceclan Dumitru <dumitru.ceclan@analog.com>
+
+description: |
+  Analog Devices AD717x ADC's:
+  The AD717x family offer a complete integrated Sigma-Delta ADC solution which
+  can be used in high precision, low noise single channel applications
+  (Life Science measurements) or higher speed multiplexed applications
+  (Factory Automation PLC Input modules). The Sigma-Delta ADC is intended
+  primarily for measurement of signals close to DC but also delivers
+  outstanding performance with input bandwidths out to ~10kHz.
+
+  Datasheets for supported chips:
+    https://www.analog.com/media/en/technical-documentation/data-sheets/AD7172-2.pdf
+    https://www.analog.com/media/en/technical-documentation/data-sheets/AD7172-4.pdf
+    https://www.analog.com/media/en/technical-documentation/data-sheets/AD7173-8.pdf
+    https://www.analog.com/media/en/technical-documentation/data-sheets/AD7175-2.pdf
+    https://www.analog.com/media/en/technical-documentation/data-sheets/AD7175-8.pdf
+    https://www.analog.com/media/en/technical-documentation/data-sheets/AD7176-2.pdf
+    https://www.analog.com/media/en/technical-documentation/data-sheets/AD7177-2.pdf
+
+properties:
+  compatible:
+    enum:
+      - adi,ad7172-2
+      - adi,ad7172-4
+      - adi,ad7173-8
+      - adi,ad7175-2
+      - adi,ad7175-8
+      - adi,ad7176-2
+      - adi,ad7177-2
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    minItems: 1
+    items:
+      - description: |
+          Ready: multiplexed with SPI data out. While SPI CS is low,
+          can be used to indicate the completion of a conversion.
+
+      - description: |
+          Error: The three error bits in the status register (ADC_ERROR, CRC_ERROR,
+          and REG_ERROR) are OR'ed, inverted, and mapped to the ERROR pin.
+          Therefore, the ERROR pin indicates that an error has occurred.
+
+  interrupt-names:
+    minItems: 1
+    items:
+      - const: rdy
+      - const: err
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+  spi-max-frequency:
+    maximum: 20000000
+
+  gpio-controller:
+    description: Marks the device node as a GPIO controller.
+
+  '#gpio-cells':
+    const: 2
+    description:
+      The first cell is the GPIO number and the second cell specifies
+      GPIO flags, as defined in <dt-bindings/gpio/gpio.h>.
+
+  vref-supply:
+    description: |
+      Differential external reference supply used for conversion. The reference
+      voltage (Vref) specified here must be the voltage difference between the
+      REF+ and REF- pins: Vref = (REF+) - (REF-).
+
+  vref2-supply:
+    description: |
+      Differential external reference supply used for conversion. The reference
+      voltage (Vref2) specified here must be the voltage difference between the
+      REF2+ and REF2- pins: Vref2 = (REF2+) - (REF2-).
+
+  avdd-supply:
+    description: Avdd supply, can be used as reference for conversion.
+                 This supply is referenced to AVSS, voltage specified here
+                 represents (AVDD1 - AVSS).
+
+  avdd2-supply:
+    description: Avdd2 supply, used as the input to the internal voltage regulator.
+                 This supply is referenced to AVSS, voltage specified here
+                 represents (AVDD2 - AVSS).
+
+  iovdd-supply:
+    description: iovdd supply, used for the chip digital interface.
+
+  clocks:
+    maxItems: 1
+    description: |
+      Optional external clock source. Can include one clock source: external
+      clock or external crystal.
+
+  clock-names:
+    enum:
+      - ext-clk
+      - xtal
+
+  '#clock-cells':
+    const: 0
+
+patternProperties:
+  "^channel@[0-9a-f]$":
+    type: object
+    $ref: adc.yaml
+    unevaluatedProperties: false
+
+    properties:
+      reg:
+        minimum: 0
+        maximum: 15
+
+      diff-channels:
+        items:
+          minimum: 0
+          maximum: 31
+
+      adi,reference-select:
+        description: |
+          Select the reference source to use when converting on
+          the specific channel. Valid values are:
+          vref       : REF+  /REF−
+          vref2      : REF2+ /REF2−
+          refout-avss: REFOUT/AVSS (Internal reference)
+          avdd       : AVDD  /AVSS
+
+          External reference ref2 only available on ad7173-8 and ad7172-4.
+          Internal reference refout-avss not available on ad7172-4.
+
+          If not specified, internal reference used (if available).
+        $ref: /schemas/types.yaml#/definitions/string
+        enum:
+          - vref
+          - vref2
+          - refout-avss
+          - avdd
+        default: refout-avss
+
+    required:
+      - reg
+      - diff-channels
+
+required:
+  - compatible
+  - reg
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+  # Only ad7172-4, ad7173-8 and ad7175-8 support vref2
+  # Other models have [0-3] channel registers
+  - if:
+      properties:
+        compatible:
+          not:
+            contains:
+              enum:
+                - adi,ad7172-4
+                - adi,ad7173-8
+                - adi,ad7175-8
+    then:
+      properties:
+        vref2-supply: false
+      patternProperties:
+        "^channel@[0-9a-f]$":
+          properties:
+            adi,reference-select:
+              enum:
+                - vref
+                - refout-avss
+                - avdd
+            reg:
+              maximum: 3
+
+  # Model ad7172-4 does not support internal reference
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: adi,ad7172-4
+    then:
+      patternProperties:
+        "^channel@[0-9a-f]$":
+          properties:
+            reg:
+              maximum: 7
+            adi,reference-select:
+              enum:
+                - vref
+                - vref2
+                - avdd
+          required:
+            - adi,reference-select
+
+  - if:
+      anyOf:
+        - required: [clock-names]
+        - required: [clocks]
+    then:
+      properties:
+        '#clock-cells': false
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    spi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      adc@0 {
+        compatible = "adi,ad7173-8";
+        reg = <0>;
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        interrupts = <25 IRQ_TYPE_EDGE_FALLING>;
+        interrupt-names = "rdy";
+        interrupt-parent = <&gpio>;
+        spi-max-frequency = <5000000>;
+        gpio-controller;
+        #gpio-cells = <2>;
+        #clock-cells = <0>;
+
+        vref-supply = <&dummy_regulator>;
+
+        channel@0 {
+          reg = <0>;
+          bipolar;
+          diff-channels = <0 1>;
+          adi,reference-select = "vref";
+        };
+
+        channel@1 {
+          reg = <1>;
+          diff-channels = <2 3>;
+        };
+
+        channel@2 {
+          reg = <2>;
+          bipolar;
+          diff-channels = <4 5>;
+        };
+
+        channel@3 {
+          reg = <3>;
+          bipolar;
+          diff-channels = <6 7>;
+        };
+
+        channel@4 {
+          reg = <4>;
+          diff-channels = <8 9>;
+          adi,reference-select = "avdd";
+        };
+      };
+    };
diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7944.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7944.yaml
new file mode 100644
index 000000000000..d17d184842d3
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7944.yaml
@@ -0,0 +1,213 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/adi,ad7944.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices PulSAR LFCSP Analog to Digital Converters
+
+maintainers:
+  - Michael Hennerich <Michael.Hennerich@analog.com>
+  - Nuno Sá <nuno.sa@analog.com>
+
+description: |
+  A family of pin-compatible single channel differential analog to digital
+  converters with SPI support in a LFCSP package.
+
+  * https://www.analog.com/en/products/ad7944.html
+  * https://www.analog.com/en/products/ad7985.html
+  * https://www.analog.com/en/products/ad7986.html
+
+$ref: /schemas/spi/spi-peripheral-props.yaml#
+
+properties:
+  compatible:
+    enum:
+      - adi,ad7944
+      - adi,ad7985
+      - adi,ad7986
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 111111111
+
+  spi-cpol: true
+  spi-cpha: true
+
+  adi,spi-mode:
+    $ref: /schemas/types.yaml#/definitions/string
+    enum: [ single, chain ]
+    description: |
+      This property indicates the SPI wiring configuration.
+
+      When this property is omitted, it is assumed that the device is using what
+      the datasheet calls "4-wire mode". This is the conventional SPI mode used
+      when there are multiple devices on the same bus. In this mode, the CNV
+      line is used to initiate the conversion and the SDI line is connected to
+      CS on the SPI controller.
+
+      When this property is present, it indicates that the device is using one
+      of the following alternative wiring configurations:
+
+      * single: The datasheet calls this "3-wire mode". (NOTE: The datasheet's
+        definition of 3-wire mode is NOT at all related to the standard
+        spi-3wire property!) This mode is often used when the ADC is the only
+        device on the bus. In this mode, SDI is tied to VIO, and the CNV line
+        can be connected to the CS line of the SPI controller or to a GPIO, in
+        which case the CS line of the controller is unused.
+      * chain: The datasheet calls this "chain mode". This mode is used to save
+        on wiring when multiple ADCs are used. In this mode, the SDI line of
+        one chip is tied to the SDO of the next chip in the chain and the SDI of
+        the last chip in the chain is tied to GND. Only the first chip in the
+        chain is connected to the SPI bus. The CNV line of all chips are tied
+        together. The CS line of the SPI controller can be used as the CNV line
+        only if it is active high.
+
+  '#daisy-chained-devices': true
+
+  avdd-supply:
+    description: A 2.5V supply that powers the analog circuitry.
+
+  dvdd-supply:
+    description: A 2.5V supply that powers the digital circuitry.
+
+  vio-supply:
+    description:
+      A 1.8V to 2.7V supply for the digital inputs and outputs.
+
+  bvdd-supply:
+    description:
+      A voltage supply for the buffered power. When using an external reference
+      without an internal buffer (PDREF high, REFIN low), this should be
+      connected to the same supply as ref-supply. Otherwise, when using an
+      internal reference or an external reference with an internal buffer, this
+      is connected to a 5V supply.
+
+  ref-supply:
+    description:
+      Voltage regulator for the external reference voltage (REF). This property
+      is omitted when using an internal reference.
+
+  refin-supply:
+    description:
+      Voltage regulator for the reference buffer input (REFIN). When using an
+      external buffer with internal reference, this should be connected to a
+      1.2V external reference voltage supply. Otherwise, this property is
+      omitted.
+
+  cnv-gpios:
+    description:
+      The Convert Input (CNV). This input has multiple functions. It initiates
+      the conversions and selects the SPI mode of the device (chain or CS). In
+      'single' mode, this property is omitted if the CNV pin is connected to the
+      CS line of the SPI controller.
+    maxItems: 1
+
+  turbo-gpios:
+    description:
+      GPIO connected to the TURBO line. If omitted, it is assumed that the TURBO
+      line is hard-wired and the state is determined by the adi,always-turbo
+      property.
+    maxItems: 1
+
+  adi,always-turbo:
+    type: boolean
+    description:
+      When present, this property indicates that the TURBO line is hard-wired
+      and the state is always high. If neither this property nor turbo-gpios is
+      present, the TURBO line is assumed to be hard-wired and the state is
+      always low.
+
+  interrupts:
+    description:
+      The SDO pin can also function as a busy indicator. This node should be
+      connected to an interrupt that is triggered when the SDO line goes low
+      while the SDI line is high and the CNV line is low ('single' mode) or the
+      SDI line is low and the CNV line is high ('multi' mode); or when the SDO
+      line goes high while the SDI and CNV lines are high (chain mode),
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - avdd-supply
+  - dvdd-supply
+  - vio-supply
+  - bvdd-supply
+
+allOf:
+  # ref-supply and refin-supply are mutually exclusive (neither is also valid)
+  - if:
+      required:
+        - ref-supply
+    then:
+      properties:
+        refin-supply: false
+  - if:
+      required:
+        - refin-supply
+    then:
+      properties:
+        ref-supply: false
+  # in '4-wire' mode, cnv-gpios is required, for other modes it is optional
+  - if:
+      not:
+        required:
+          - adi,spi-mode
+    then:
+      required:
+        - cnv-gpios
+  # chain mode has lower SCLK max rate and doesn't work when TURBO is enabled
+  - if:
+      required:
+        - adi,spi-mode
+      properties:
+        adi,spi-mode:
+          const: chain
+    then:
+      properties:
+        spi-max-frequency:
+          maximum: 90909090
+        adi,always-turbo: false
+      required:
+        - '#daisy-chained-devices'
+    else:
+      properties:
+        '#daisy-chained-devices': false
+  # turbo-gpios and adi,always-turbo are mutually exclusive
+  - if:
+      required:
+        - turbo-gpios
+    then:
+      properties:
+        adi,always-turbo: false
+  - if:
+      required:
+        - adi,always-turbo
+    then:
+      properties:
+        turbo-gpios: false
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        adc@0 {
+            compatible = "adi,ad7944";
+            reg = <0>;
+            spi-cpha;
+            spi-max-frequency = <111111111>;
+            avdd-supply = <&supply_2_5V>;
+            dvdd-supply = <&supply_2_5V>;
+            vio-supply = <&supply_1_8V>;
+            bvdd-supply = <&supply_5V>;
+            cnv-gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
+            turbo-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
+        };
+    };
diff --git a/Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml b/Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml
index 7ef46c90ebc8..da605a051b94 100644
--- a/Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml
@@ -11,8 +11,13 @@ maintainers:
 
 properties:
   compatible:
-    enum:
-      - allwinner,sun20i-d1-gpadc
+    oneOf:
+      - enum:
+          - allwinner,sun20i-d1-gpadc
+      - items:
+          - enum:
+              - allwinner,sun50i-h616-gpadc
+          - const: allwinner,sun20i-d1-gpadc
 
   "#io-channel-cells":
     const: 1
diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ad9739a.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ad9739a.yaml
new file mode 100644
index 000000000000..c0b36476113a
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/adi,ad9739a.yaml
@@ -0,0 +1,95 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/dac/adi,ad9739a.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD9739A RF DAC
+
+maintainers:
+  - Dragos Bogdan <dragos.bogdan@analog.com>
+  - Nuno Sa <nuno.sa@analog.com>
+
+description: |
+  The AD9739A is a 14-bit, 2.5 GSPS high performance RF DACs that are capable
+  of synthesizing wideband signals from dc up to 3 GHz.
+
+  https://www.analog.com/media/en/technical-documentation/data-sheets/ad9737a_9739a.pdf
+
+properties:
+  compatible:
+    enum:
+      - adi,ad9739a
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  reset-gpios:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  vdd-3p3-supply:
+    description: 3.3V Digital input supply.
+
+  vdd-supply:
+    description: 1.8V Digital input supply.
+
+  vdda-supply:
+    description: 3.3V Analog input supply.
+
+  vddc-supply:
+    description: 1.8V Clock input supply.
+
+  vref-supply:
+    description: Input/Output reference supply.
+
+  io-backends:
+    maxItems: 1
+
+  adi,full-scale-microamp:
+    description: This property represents the DAC full scale current.
+    minimum: 8580
+    maximum: 31700
+    default: 20000
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - io-backends
+  - vdd-3p3-supply
+  - vdd-supply
+  - vdda-supply
+  - vddc-supply
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        dac@0 {
+            compatible = "adi,ad9739a";
+            reg = <0>;
+
+            clocks = <&dac_clk>;
+
+            io-backends = <&iio_backend>;
+
+            vdd-3p3-supply = <&vdd_3_3>;
+            vdd-supply = <&vdd>;
+            vdda-supply = <&vdd_3_3>;
+            vddc-supply = <&vdd>;
+        };
+    };
+...
diff --git a/Documentation/devicetree/bindings/iio/dac/adi,axi-dac.yaml b/Documentation/devicetree/bindings/iio/dac/adi,axi-dac.yaml
new file mode 100644
index 000000000000..a55e9bfc66d7
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/adi,axi-dac.yaml
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/dac/adi,axi-dac.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AXI DAC IP core
+
+maintainers:
+  - Nuno Sa <nuno.sa@analog.com>
+
+description: |
+  Analog Devices Generic AXI DAC IP core for interfacing a DAC device
+  with a high speed serial (JESD204B/C) or source synchronous parallel
+  interface (LVDS/CMOS).
+  Usually, some other interface type (i.e SPI) is used as a control
+  interface for the actual DAC, while this IP core will interface
+  to the data-lines of the DAC and handle the streaming of data from
+  memory via DMA into the DAC.
+
+  https://wiki.analog.com/resources/fpga/docs/axi_dac_ip
+
+properties:
+  compatible:
+    enum:
+      - adi,axi-dac-9.1.b
+
+  reg:
+    maxItems: 1
+
+  dmas:
+    maxItems: 1
+
+  dma-names:
+    items:
+      - const: tx
+
+  clocks:
+    maxItems: 1
+
+  '#io-backend-cells':
+    const: 0
+
+required:
+  - compatible
+  - dmas
+  - reg
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    dac@44a00000 {
+        compatible = "adi,axi-dac-9.1.b";
+        reg = <0x44a00000 0x10000>;
+        dmas = <&tx_dma 0>;
+        dma-names = "tx";
+        #io-backend-cells = <0>;
+        clocks = <&axi_clk>;
+    };
+...
diff --git a/Documentation/devicetree/bindings/iio/dac/ti,dac5571.yaml b/Documentation/devicetree/bindings/iio/dac/ti,dac5571.yaml
index 79da0323c327..e59db861e2eb 100644
--- a/Documentation/devicetree/bindings/iio/dac/ti,dac5571.yaml
+++ b/Documentation/devicetree/bindings/iio/dac/ti,dac5571.yaml
@@ -21,6 +21,7 @@ properties:
       - ti,dac5573
       - ti,dac6573
       - ti,dac7573
+      - ti,dac081c081
       - ti,dac121c081
 
   reg:
diff --git a/Documentation/devicetree/bindings/iio/health/maxim,max30102.yaml b/Documentation/devicetree/bindings/iio/health/maxim,max30102.yaml
index c13c10c8d65d..a0fe0a818d86 100644
--- a/Documentation/devicetree/bindings/iio/health/maxim,max30102.yaml
+++ b/Documentation/devicetree/bindings/iio/health/maxim,max30102.yaml
@@ -4,16 +4,20 @@
 $id: http://devicetree.org/schemas/iio/health/maxim,max30102.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Maxim MAX30102 heart rate and pulse oximeter and MAX30105 particle-sensor
+title: Maxim MAX30101/2 heart rate and pulse oximeter and MAX30105 particle-sensor
 
 maintainers:
   - Matt Ranostay <matt.ranostay@konsulko.com>
 
 properties:
   compatible:
-    enum:
-      - maxim,max30102
-      - maxim,max30105
+    oneOf:
+      - enum:
+          - maxim,max30102
+          - maxim,max30105
+      - items:
+          - const: maxim,max30101
+          - const: maxim,max30105
 
   reg:
     maxItems: 1
diff --git a/Documentation/devicetree/bindings/iio/humidity/ti,hdc3020.yaml b/Documentation/devicetree/bindings/iio/humidity/ti,hdc3020.yaml
index 8b5dedd1a598..b375d307513f 100644
--- a/Documentation/devicetree/bindings/iio/humidity/ti,hdc3020.yaml
+++ b/Documentation/devicetree/bindings/iio/humidity/ti,hdc3020.yaml
@@ -34,6 +34,9 @@ properties:
   reg:
     maxItems: 1
 
+  reset-gpios:
+    maxItems: 1
+
 required:
   - compatible
   - reg
@@ -43,6 +46,7 @@ additionalProperties: false
 
 examples:
   - |
+    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
     i2c {
         #address-cells = <1>;
@@ -54,5 +58,6 @@ examples:
             vdd-supply = <&vcc_3v3>;
             interrupt-parent = <&gpio3>;
             interrupts = <23 IRQ_TYPE_EDGE_RISING>;
+            reset-gpios = <&gpio3 27 GPIO_ACTIVE_LOW>;
         };
     };
diff --git a/Documentation/devicetree/bindings/iio/imu/invensense,icm42600.yaml b/Documentation/devicetree/bindings/iio/imu/invensense,icm42600.yaml
index 7cd05bcbee31..5e0bed2c45de 100644
--- a/Documentation/devicetree/bindings/iio/imu/invensense,icm42600.yaml
+++ b/Documentation/devicetree/bindings/iio/imu/invensense,icm42600.yaml
@@ -32,6 +32,7 @@ properties:
       - invensense,icm42605
       - invensense,icm42622
       - invensense,icm42631
+      - invensense,icm42688
 
   reg:
     maxItems: 1
diff --git a/Documentation/devicetree/bindings/iio/imu/invensense,mpu6050.yaml b/Documentation/devicetree/bindings/iio/imu/invensense,mpu6050.yaml
index 297b8a1a7ffb..587ff2bced2d 100644
--- a/Documentation/devicetree/bindings/iio/imu/invensense,mpu6050.yaml
+++ b/Documentation/devicetree/bindings/iio/imu/invensense,mpu6050.yaml
@@ -62,14 +62,15 @@ properties:
 allOf:
   - $ref: /schemas/spi/spi-peripheral-props.yaml#
   - if:
-      not:
-        properties:
-          compatible:
-            contains:
-              enum:
-                - invensense,mpu9150
-                - invensense,mpu9250
-                - invensense,mpu9255
+      properties:
+        compatible:
+          contains:
+            enum:
+              - invensense,iam20680
+              - invensense,icm20602
+              - invensense,icm20608
+              - invensense,icm20609
+              - invensense,icm20689
     then:
       properties:
         i2c-gate: false
diff --git a/Documentation/devicetree/bindings/iio/light/avago,apds9300.yaml b/Documentation/devicetree/bindings/iio/light/avago,apds9300.yaml
index 206af44f2c43..b750096530bc 100644
--- a/Documentation/devicetree/bindings/iio/light/avago,apds9300.yaml
+++ b/Documentation/devicetree/bindings/iio/light/avago,apds9300.yaml
@@ -4,17 +4,22 @@
 $id: http://devicetree.org/schemas/iio/light/avago,apds9300.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Avago APDS9300 ambient light sensor
+title: Avago Gesture/RGB/ALS/Proximity sensors
 
 maintainers:
-  - Jonathan Cameron <jic23@kernel.org>
+  - Subhajit Ghosh <subhajit.ghosh@tweaklogic.com>
 
 description: |
-  Datasheet at https://www.avagotech.com/docs/AV02-1077EN
+  Datasheet: https://www.avagotech.com/docs/AV02-1077EN
+  Datasheet: https://www.avagotech.com/docs/AV02-4191EN
+  Datasheet: https://www.avagotech.com/docs/AV02-4755EN
 
 properties:
   compatible:
-    const: avago,apds9300
+    enum:
+      - avago,apds9300
+      - avago,apds9306
+      - avago,apds9960
 
   reg:
     maxItems: 1
@@ -22,6 +27,8 @@ properties:
   interrupts:
     maxItems: 1
 
+  vdd-supply: true
+
 additionalProperties: false
 
 required:
@@ -30,6 +37,8 @@ required:
 
 examples:
   - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
     i2c {
         #address-cells = <1>;
         #size-cells = <0>;
@@ -38,7 +47,8 @@ examples:
             compatible = "avago,apds9300";
             reg = <0x39>;
             interrupt-parent = <&gpio2>;
-            interrupts = <29 8>;
+            interrupts = <29 IRQ_TYPE_LEVEL_LOW>;
+            vdd-supply = <&regulator_3v3>;
         };
     };
 ...
diff --git a/Documentation/devicetree/bindings/iio/light/avago,apds9960.yaml b/Documentation/devicetree/bindings/iio/light/avago,apds9960.yaml
deleted file mode 100644
index f06e0fda5629..000000000000
--- a/Documentation/devicetree/bindings/iio/light/avago,apds9960.yaml
+++ /dev/null
@@ -1,44 +0,0 @@
-# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
-%YAML 1.2
----
-$id: http://devicetree.org/schemas/iio/light/avago,apds9960.yaml#
-$schema: http://devicetree.org/meta-schemas/core.yaml#
-
-title: Avago APDS9960 gesture/RGB/ALS/proximity sensor
-
-maintainers:
-  - Matt Ranostay <matt.ranostay@konsulko.com>
-
-description: |
-  Datasheet at https://www.avagotech.com/docs/AV02-4191EN
-
-properties:
-  compatible:
-    const: avago,apds9960
-
-  reg:
-    maxItems: 1
-
-  interrupts:
-    maxItems: 1
-
-additionalProperties: false
-
-required:
-  - compatible
-  - reg
-
-examples:
-  - |
-    i2c {
-        #address-cells = <1>;
-        #size-cells = <0>;
-
-        light-sensor@39 {
-            compatible = "avago,apds9960";
-            reg = <0x39>;
-            interrupt-parent = <&gpio1>;
-            interrupts = <16 1>;
-        };
-    };
-...
diff --git a/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml b/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml
index dbb85135fd66..312febeeb3bb 100644
--- a/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml
+++ b/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml
@@ -57,6 +57,8 @@ properties:
   interrupts:
     maxItems: 1
 
+  vdd-supply: true
+
   adi,mux-delay-config-us:
     description: |
       Extra delay prior to each conversion, in addition to the internal 1ms
@@ -460,6 +462,7 @@ required:
   - compatible
   - reg
   - interrupts
+  - vdd-supply
 
 additionalProperties: false
 
@@ -489,6 +492,7 @@ examples:
             #address-cells = <1>;
             #size-cells = <0>;
 
+            vdd-supply = <&supply>;
             interrupts = <20 IRQ_TYPE_EDGE_RISING>;
             interrupt-parent = <&gpio>;
 
diff --git a/Documentation/iio/ad7944.rst b/Documentation/iio/ad7944.rst
new file mode 100644
index 000000000000..f418ab1288ae
--- /dev/null
+++ b/Documentation/iio/ad7944.rst
@@ -0,0 +1,130 @@
+.. SPDX-License-Identifier: GPL-2.0-only
+
+=============
+AD7944 driver
+=============
+
+ADC driver for Analog Devices Inc. AD7944 and similar devices. The module name
+is ``ad7944``.
+
+
+Supported devices
+=================
+
+The following chips are supported by this driver:
+
+* `AD7944 <https://www.analog.com/AD7944>`_
+* `AD7985 <https://www.analog.com/AD7985>`_
+* `AD7986 <https://www.analog.com/AD7986>`_
+
+
+Supported features
+==================
+
+SPI wiring modes
+----------------
+
+The driver currently supports two of the many possible SPI wiring configurations.
+
+CS mode, 3-wire, without busy indicator
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. code-block::
+
+                                         +-------------+
+                    +--------------------| CS          |
+                    v                    |             |
+    VIO   +--------------------+         |     HOST    |
+     |    |        CNV         |         |             |
+     +--->| SDI   AD7944   SDO |-------->| SDI         |
+          |        SCK         |         |             |
+          +--------------------+         |             |
+                    ^                    |             |
+                    +--------------------| SCLK        |
+                                         +-------------+
+
+To select this mode in the device tree, set the ``adi,spi-mode`` property to
+``"single"`` and omit the ``cnv-gpios`` property.
+
+CS mode, 4-wire, without busy indicator
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. code-block::
+
+                                         +-------------+
+     +-----------------------------------| CS          |
+     |                                   |             |
+     |              +--------------------| GPIO        |
+     |              v                    |             |
+     |    +--------------------+         |     HOST    |
+     |    |        CNV         |         |             |
+     +--->| SDI   AD7944   SDO |-------->| SDI         |
+          |        SCK         |         |             |
+          +--------------------+         |             |
+                    ^                    |             |
+                    +--------------------| SCLK        |
+                                         +-------------+
+
+To select this mode in the device tree, omit the ``adi,spi-mode`` property and
+provide the ``cnv-gpios`` property.
+
+Reference voltage
+-----------------
+
+All 3 possible reference voltage sources are supported:
+
+- Internal reference
+- External 1.2V reference and internal buffer
+- External reference
+
+The source is determined by the device tree. If ``ref-supply`` is present, then
+the external reference is used. If ``refin-supply`` is present, then the internal
+buffer is used. If neither is present, then the internal reference is used.
+
+Unimplemented features
+----------------------
+
+- ``BUSY`` indication
+- ``TURBO`` mode
+- Daisy chain mode
+
+
+Device attributes
+=================
+
+There are two types of ADCs in this family, pseudo-differential and fully
+differential. The channel name is different depending on the type of ADC.
+
+Pseudo-differential ADCs
+------------------------
+
+AD7944 and AD7985 are pseudo-differential ADCs and have the following attributes:
+
++---------------------------------------+--------------------------------------------------------------+
+| Attribute                             | Description                                                  |
++=======================================+==============================================================+
+| ``in_voltage0_raw``                   | Raw ADC voltage value (*IN+* referenced to ground sense).    |
++---------------------------------------+--------------------------------------------------------------+
+| ``in_voltage0_scale``                 | Scale factor to convert raw value to mV.                     |
++---------------------------------------+--------------------------------------------------------------+
+
+Fully-differential ADCs
+-----------------------
+
+AD7986 is a fully-differential ADC and has the following attributes:
+
++---------------------------------------+--------------------------------------------------------------+
+| Attribute                             | Description                                                  |
++=======================================+==============================================================+
+| ``in_voltage0-voltage1_raw``          | Raw ADC voltage value (*IN+* - *IN-*).                       |
++---------------------------------------+--------------------------------------------------------------+
+| ``in_voltage0-voltage1_scale``        | Scale factor to convert raw value to mV.                     |
++---------------------------------------+--------------------------------------------------------------+
+
+
+Device buffers
+==============
+
+This driver supports IIO triggered buffers.
+
+See :doc:`iio_devbuf` for more information.
diff --git a/Documentation/iio/index.rst b/Documentation/iio/index.rst
index 30b09eefe75e..fb6f9d743211 100644
--- a/Documentation/iio/index.rst
+++ b/Documentation/iio/index.rst
@@ -16,6 +16,7 @@ Industrial I/O Kernel Drivers
 .. toctree::
    :maxdepth: 1
 
+   ad7944
    adis16475
    bno055
    ep93xx_adc