Merge tag 'iio-for-5.16b' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-next

Jonathan writes:

2nd set of IIO new driver, cleanups and features for the 5.16 cycle

New device support
* adrf6780 microwave upconverter.
  - New driver for this interesting device including bindings.

Features
* lite-on ltr501
  - Add dt-bindings including vendor ID and of_device_id table.
  - Add regulator support.
* sensiron,scd4x
  - Add reporting of channel scale.

Cleanups including fixes for things in this cycle
* Tree wide: Another set of dev_err_probe() introductions to reduce
  noise in logs when deferred probing is needed and provide more debug
  info. Devices included this time:
  - amlogic,meson_saradc
  - capella,cm3605
  - fsl,imx7d
  - maxim,max1118
  - maxim,max1241
  - nxp,lpc18xx
  - qcom,pm8xxxx-xoadc
  - rockchip,saradc
  - sharp,gp2ap002
  - sterricson,ab8500
  - ti,ads7950
* core - iio:buffer
  - Fix a path where a ret value is not intialized.
* channel-mux
  - Add support to mux core subsystem for a settling delay and use
    it in the iio-channel-mux driver.
  - Fix a few dt binding warnings.
* nxp,lpc18xx
  - Convert to devm_ functions for all of probe and drop remove()
* st,lsm6dsx
  - Suppress a warning due to lack of handling of an enum *_MAX entry
    that is just there to get the size.
* st,stm32-adc
  - Add generic channel binding, deprecating the old approach.
  - Add nvmem support to get calibration data for the vrefint channel and
    use it to perform such calibration.
  - Add a binding for sample-time to the generic channel description as it
    can be per channel.
* ti,adc128s052
  - Use devm_ managed functions and drop remove()
* vti,sca3000
  - Use sign_extend32() rather than opencoding.
* xilinx,xadc
  - Drop irq field from state structure as now just used in probe.

* tag 'iio-for-5.16b' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (36 commits)
  dt-bindings: iio: frequency: add adrf6780 doc
  iio: frequency: adrf6780: add support for ADRF6780
  iio: chemical: scd4x: Add a scale for the co2 concentration reading
  dt-bindings: iio: io-channel-mux: allow duplicate channel, labels
  dt-bindings: iio: io-channel-mux: add optional #io-channel-cells
  iio: adc: adc128s052: Simplify adc128_probe()
  iio: multiplexer: iio-mux: Support settle-time-us property
  dt-bindings: iio: io-channel-mux: Add property for settle time
  mux: add support for delay after muxing
  iio: adc: stm32-adc: use generic binding for sample-time
  iio: adc: stm32-adc: add vrefint calibration support
  iio: adc: stm32-adc: add support of internal channels
  iio: adc: stm32-adc: add support of generic channels binding
  iio: adc: stm32-adc: split channel init into several routines
  dt-bindings: iio: stm32-adc: add nvmem support for vrefint internal channel
  dt-bindings: iio: stm32-adc: add generic channel binding
  iio: accel: sca3000: Use sign_extend32() instead of opencoding sign extension.
  iio: xilinx-xadc: Remove `irq` field from state struct
  iio: imu: st_lsm6dsx: Avoid potential array overflow in st_lsm6dsx_set_odr()
  iio: light: gp2ap002: Make use of the helper function dev_err_probe()
  ...

4 files changed, 294 insertions, 9 deletions

diff --git a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.yaml b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.yaml
index a58334c3bb76..ec0450d111a9 100644
--- a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.yaml
@@ -222,6 +222,12 @@ patternProperties:
       '#io-channel-cells':
         const: 1
 
+      '#address-cells':
+        const: 1
+
+      '#size-cells':
+        const: 0
+
       interrupts:
         description: |
           IRQ Line for the ADC instance. Valid values are:
@@ -256,6 +262,7 @@ patternProperties:
             - 20 channels, numbered from 0 to 19 (for in0..in19) on stm32h7 and
               stm32mp1.
         $ref: /schemas/types.yaml#/definitions/uint32-array
+        deprecated: true
 
       st,adc-diff-channels:
         description: |
@@ -265,7 +272,9 @@ patternProperties:
           <vinp vinn>, <vinp vinn>,... vinp and vinn are numbered from 0 to 19.
 
           Note: At least one of "st,adc-channels" or "st,adc-diff-channels" is
-          required. Both properties can be used together. Some channels can be
+          required if no adc generic channel is defined. These legacy channel
+          properties are exclusive with adc generic channel bindings.
+          Both properties can be used together. Some channels can be
           used as single-ended and some other ones as differential (mixed). But
           channels can't be configured both as single-ended and differential.
         $ref: /schemas/types.yaml#/definitions/uint32-matrix
@@ -279,6 +288,7 @@ patternProperties:
                 "vinn" indicates negative input number
               minimum: 0
               maximum: 19
+        deprecated: true
 
       st,min-sample-time-nsecs:
         description:
@@ -289,6 +299,50 @@ patternProperties:
           list, to set sample time resp. for all channels, or independently for
           each channel.
         $ref: /schemas/types.yaml#/definitions/uint32-array
+        deprecated: true
+
+      nvmem-cells:
+        items:
+          - description: Phandle to the calibration vrefint data provided by otp
+
+      nvmem-cell-names:
+        items:
+          - const: vrefint
+
+    patternProperties:
+      "^channel@([0-9]|1[0-9])$":
+        type: object
+        $ref: "adc.yaml"
+        description: Represents the external channels which are connected to the ADC.
+
+        properties:
+          reg:
+            items:
+              minimum: 0
+              maximum: 19
+
+          label:
+            description: |
+              Unique name to identify which channel this is.
+              Reserved label names "vddcore", "vrefint" and "vbat"
+              are used to identify internal channels with matching names.
+
+          diff-channels:
+            $ref: /schemas/types.yaml#/definitions/uint32-array
+            items:
+              minimum: 0
+              maximum: 19
+
+          st,min-sample-time-ns:
+            description: |
+              Minimum sampling time in nanoseconds. Depending on hardware (board)
+              e.g. high/low analog input source impedance, fine tune of ADC
+              sampling time may be recommended.
+
+        required:
+          - reg
+
+        additionalProperties: false
 
     allOf:
       - if:
@@ -369,12 +423,6 @@ patternProperties:
 
     additionalProperties: false
 
-    anyOf:
-      - required:
-          - st,adc-channels
-      - required:
-          - st,adc-diff-channels
-
     required:
       - compatible
       - reg
@@ -451,4 +499,50 @@ examples:
         // other adc child node follow...
       };
 
+  - |
+    // Example 3: with stm32mp157c to setup ADC2 with:
+    // - internal channels 13, 14, 15.
+      #include <dt-bindings/interrupt-controller/arm-gic.h>
+      #include <dt-bindings/clock/stm32mp1-clks.h>
+      adc122: adc@48003000 {
+        compatible = "st,stm32mp1-adc-core";
+        reg = <0x48003000 0x400>;
+        interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 90 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&rcc ADC12>, <&rcc ADC12_K>;
+        clock-names = "bus", "adc";
+        booster-supply = <&booster>;
+        vdd-supply = <&vdd>;
+        vdda-supply = <&vdda>;
+        vref-supply = <&vref>;
+        st,syscfg = <&syscfg>;
+        interrupt-controller;
+        #interrupt-cells = <1>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        adc@100 {
+          compatible = "st,stm32mp1-adc";
+          #io-channel-cells = <1>;
+          reg = <0x100>;
+          interrupts = <1>;
+          #address-cells = <1>;
+          #size-cells = <0>;
+          channel@13 {
+            reg = <13>;
+            label = "vrefint";
+            st,min-sample-time-ns = <9000>;
+          };
+          channel@14 {
+            reg = <14>;
+            label = "vddcore";
+            st,min-sample-time-ns = <9000>;
+          };
+          channel@15 {
+            reg = <15>;
+            label = "vbat";
+            st,min-sample-time-ns = <9000>;
+          };
+        };
+      };
+
 ...
diff --git a/Documentation/devicetree/bindings/iio/frequency/adi,adrf6780.yaml b/Documentation/devicetree/bindings/iio/frequency/adi,adrf6780.yaml
new file mode 100644
index 000000000000..3a8ea93f4e0c
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/frequency/adi,adrf6780.yaml
@@ -0,0 +1,131 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/frequency/adi,adrf6780.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ADRF6780 Microwave Upconverter
+
+maintainers:
+  - Antoniu Miclaus <antoniu.miclaus@analog.com>
+
+description: |
+   Wideband, microwave upconverter optimized for point to point microwave
+   radio designs operating in the 5.9 GHz to 23.6 GHz frequency range.
+
+   https://www.analog.com/en/products/adrf6780.html
+
+properties:
+  compatible:
+    enum:
+      - adi,adrf6780
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 1000000
+
+  clocks:
+    description:
+      Definition of the external clock.
+    minItems: 1
+
+  clock-names:
+    items:
+      - const: lo_in
+
+  clock-output-names:
+    maxItems: 1
+
+  adi,vga-buff-en:
+    description:
+      RF Variable Gain Amplifier Buffer Enable. Gain is controlled by
+      the voltage on the VATT pin.
+    type: boolean
+
+  adi,lo-buff-en:
+    description:
+      Local Oscillator Amplifier Enable. Disable to put the part in
+      a power down state.
+    type: boolean
+
+  adi,if-mode-en:
+    description:
+      Intermediate Frequency Mode Enable. Either IF Mode or I/Q Mode
+      can be enabled at a time.
+    type: boolean
+
+  adi,iq-mode-en:
+    description:
+      I/Q Mode Enable. Either IF Mode or I/Q Mode can be enabled at a
+      time.
+    type: boolean
+
+  adi,lo-x2-en:
+    description:
+      Double the Local Oscillator output frequency from the Local
+      Oscillator Input Frequency. Either LOx1 or LOx2 can be enabled
+      at a time.
+    type: boolean
+
+  adi,lo-ppf-en:
+    description:
+      Local Oscillator input frequency equal to the Local Oscillator
+      output frequency (LO x1). Either LOx1 or LOx2 can be enabled
+      at a time.
+    type: boolean
+
+  adi,lo-en:
+    description:
+      Enable additional cirtuitry in the LO chain. Disable to put the
+      part in a power down state.
+    type: boolean
+
+  adi,uc-bias-en:
+    description:
+      Enable all bias circuitry thourghout the entire part.
+      Disable to put the part in a power down state.
+    type: boolean
+
+  adi,lo-sideband:
+    description:
+      Switch to the Lower LO Sideband. By default the Upper LO
+      sideband is enabled.
+    type: boolean
+
+  adi,vdet-out-en:
+    description:
+      VDET Output Select Enable. Expose the RF detector output to the
+      VDET external pin.
+    type: boolean
+
+  '#clock-cells':
+    const: 0
+
+dependencies:
+  adi,lo-x2-en: [ "adi,lo-en" ]
+  adi,lo-ppf-en: [ "adi,lo-en" ]
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    spi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      adrf6780@0 {
+        compatible = "adi,adrf6780";
+        reg = <0>;
+        spi-max-frequency = <1000000>;
+        clocks = <&adrf6780_lo>;
+        clock-names = "lo_in";
+      };
+    };
+...
diff --git a/Documentation/devicetree/bindings/iio/light/liteon,ltr501.yaml b/Documentation/devicetree/bindings/iio/light/liteon,ltr501.yaml
new file mode 100644
index 000000000000..db0407bc9209
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/light/liteon,ltr501.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/light/liteon,ltr501.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: LiteON LTR501 I2C Proximity and Light sensor
+
+maintainers:
+  - Nikita Travkin <nikita@trvn.ru>
+
+properties:
+  compatible:
+    enum:
+      - liteon,ltr501
+      - liteon,ltr559
+      - liteon,ltr301
+
+  reg:
+    maxItems: 1
+
+  vdd-supply: true
+  vddio-supply: true
+
+  interrupts:
+    maxItems: 1
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        light-sensor@23 {
+            compatible = "liteon,ltr559";
+            reg = <0x23>;
+            vdd-supply = <&pm8916_l17>;
+            vddio-supply = <&pm8916_l6>;
+
+            interrupt-parent = <&msmgpio>;
+            interrupts = <115 IRQ_TYPE_EDGE_FALLING>;
+        };
+    };
diff --git a/Documentation/devicetree/bindings/iio/multiplexer/io-channel-mux.yaml b/Documentation/devicetree/bindings/iio/multiplexer/io-channel-mux.yaml
index 870b043406d8..611ad4444cf0 100644
--- a/Documentation/devicetree/bindings/iio/multiplexer/io-channel-mux.yaml
+++ b/Documentation/devicetree/bindings/iio/multiplexer/io-channel-mux.yaml
@@ -35,9 +35,18 @@ properties:
   mux-control-names: true
 
   channels:
-    $ref: /schemas/types.yaml#/definitions/string-array
+    $ref: /schemas/types.yaml#/definitions/non-unique-string-array
     description:
-      List of strings, labeling the mux controller states.
+      List of strings, labeling the mux controller states. An empty
+      string for a state means that the channel is not available.
+
+  settle-time-us:
+    default: 0
+    description:
+      Time required for analog signals to settle after muxing.
+
+  "#io-channel-cells":
+    const: 1
 
 required:
   - compatible