Merge tag 'iio-for-5.1b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

Second set of new device support, features and cleanup for IIO in the 5.1 cycle.

There are a few late breaking fixes in here that weren't worth trying to
rush into 5.0 as they have been with us for quite a while.

New device support
* ad7476
  - add support for TI ADS786X parts that are compatible with this Analog
    Devices driver. Good to see some simple devices are so similar.
* Ingenic jz47xx SoC ADCs
  - new driver and bindings
* Plantower PMS7003 partical sensor
  - new driver and bindings including vendor prefix.
* TI DAC7612
  - new driver and bindings for this dual DAC.

New features
* ad7768-1
  - Sampling frequency control
* bmi160
  - Data ready trigger support, including open-drain dt binding.

Cleanup / minor fixes.
* Analog Device DACs
  - Fix some inconsistent licenses.  These are only ones where there were
    two different license marked in the same file, and hence were previously
    unclear.
* ads124s08
  - Spelling fix.
* adxl345
  - Parameter alignement tidy up.
* bmi160
  - SPDX
  - correct a note on the types of supported interrupts which was too strict.
  - use iio_pollfunc_store_time to grab an earlier timestamp.
  - use if (ret) instead of if (ret < 0) to be consistent whilst simplifying
    some handling where ret was effectively getting written to 0 even though
    it was always already 0.
* exynos_adc
  - Fix a null pointer dereference on unbind.
  - Fix number of channels on Exynos4x12 devices to be 4 rather than 8.
* lpc32xx-adc
  - Move DT bindings doc out of staging. Oops, I missed this one when
    moving the driver.
  - SPDX.
* npcm-adc
  - drop documentation of reset node as going to be done differently.
    It's a new driver this cycle so no need to support the previous
    binding going forwards.
* sps30
  - Fix an issue with a loop timeout test that meant it would never identify
    a timeout.
  - Mark deliberate switch fall throughs.

* tag 'iio-for-5.1b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (26 commits)
  iio: adc: exynos-adc: Use proper number of channels for Exynos4x12
  dt-binding: iio: remove rst node from NPCM ADC document
  dt-bindings: iio: chemical: pms7003: add device tree support
  dt-bindings: add Plantower to the vendor prefixes
  iio: chemical: add support for Plantower PMS7003 sensor
  iio:chemical:sps30 Supress some switch fallthrough warnings.
  iio:adc:lpc32xx use SPDX-License-Identifier
  dt-bindings: iio: adc: move lpc32xx-adc out of staging
  iio: adc: ads124s08: fix spelling mistake "converions" -> "conversions"
  iio: adc: exynos-adc: Fix NULL pointer exception on unbind
  iio: chemical: sps30: fix a loop timeout test
  iio:accel:adxl345: Change alignment to match paranthesis
  iio:dac:dac7612: device tree bindings
  iio:dac:ti-dac7612: Add driver for Texas Instruments DAC7612
  iio: adc: ad7476: Add support for TI ADS786X ADCs
  iio: adc: ad7768-1: Add support for setting the sampling frequency
  drivers: iio: dac: Fix wrong license for ADI drivers
  IIO: add Ingenic JZ47xx ADC driver.
  dt-bindings: iio/adc: Add bindings for Ingenic JZ47xx SoCs ADC.
  dt-bindings: iio/adc: Add docs for Ingenic JZ47xx SoCs ADC.
  ...

Documentation/devicetree/bindings/iio/adc/ingenic,adc.txt

@@ -0,0 +1,48 @@
+* Ingenic JZ47xx ADC controller IIO bindings
+
+Required properties:
+
+- compatible: Should be one of:
+  * ingenic,jz4725b-adc
+  * ingenic,jz4740-adc
+- reg: ADC controller registers location and length.
+- clocks: phandle to the SoC's ADC clock.
+- clock-names: Must be set to "adc".
+- #io-channel-cells: Must be set to <1> to indicate channels are selected
+  by index.
+
+ADC clients must use the format described in iio-bindings.txt, giving
+a phandle and IIO specifier pair ("io-channels") to the ADC controller.
+
+Example:
+
+#include <dt-bindings/iio/adc/ingenic,adc.h>
+
+adc: adc@10070000 {
+	compatible = "ingenic,jz4740-adc";
+	#io-channel-cells = <1>;
+
+	reg = <0x10070000 0x30>;
+
+	clocks = <&cgu JZ4740_CLK_ADC>;
+	clock-names = "adc";
+
+	interrupt-parent = <&intc>;
+	interrupts = <18>;
+};
+
+adc-keys {
+	...
+	compatible = "adc-keys";
+	io-channels = <&adc INGENIC_ADC_AUX>;
+	io-channel-names = "buttons";
+	...
+};
+
+battery {
+	...
+	compatible = "ingenic,jz4740-battery";
+	io-channels = <&adc INGENIC_ADC_BATTERY>;
+	io-channel-names = "battery";
+	...
+};

Documentation/devicetree/bindings/iio/adc/nuvoton,npcm-adc.txt

@@ -14,11 +14,6 @@ Optional properties:
 			   vref-supply is not added the ADC will use internal voltage
 			   reference.
 
-Required Node in the NPCM7xx BMC:
-An additional register is present in the NPCM7xx SOC which is
-assumed to be in the same device tree, with and marked as
-compatible with "nuvoton,npcm750-rst".
-
 Example:
 
 adc: adc@f000c000 {
@@ -27,9 +22,3 @@ adc: adc@f000c000 {
 	interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>;
 	clocks = <&clk NPCM7XX_CLK_ADC>;
 };
-
-rst: rst@f0801000 {
-	compatible = "nuvoton,npcm750-rst", "syscon",
-	"simple-mfd";
-	reg = <0xf0801000 0x6C>;
-};

Documentation/devicetree/bindings/iio/adc/samsung,exynos-adc.txt

@@ -11,11 +11,13 @@ New driver handles the following
 
 Required properties:
 - compatible:		Must be "samsung,exynos-adc-v1"
-				for exynos4412/5250 controllers.
+				for Exynos5250 controllers.
 			Must be "samsung,exynos-adc-v2" for
 				future controllers.
 			Must be "samsung,exynos3250-adc" for
 				controllers compatible with ADC of Exynos3250.
+			Must be "samsung,exynos4212-adc" for
+				controllers compatible with ADC of Exynos4212 and Exynos4412.
 			Must be "samsung,exynos7-adc" for
 				the ADC in Exynos7 and compatibles
 			Must be "samsung,s3c2410-adc" for

Documentation/devicetree/bindings/iio/chemical/plantower,pms7003.txt

@@ -0,0 +1,20 @@
+* Plantower PMS7003 particulate matter sensor
+
+Required properties:
+- compatible: must be "plantower,pms7003"
+- vcc-supply: phandle to the regulator that provides power to the sensor
+
+Optional properties:
+- plantower,set-gpios: phandle to the GPIO connected to the SET line
+- reset-gpios: phandle to the GPIO connected to the RESET line
+
+Refer to serial/slave-device.txt for generic serial attached device bindings.
+
+Example:
+
+&uart0 {
+	air-pollution-sensor {
+		compatible = "plantower,pms7003";
+		vcc-supply = <&reg_vcc5v0>;
+	};
+};

Documentation/devicetree/bindings/iio/dac/ti,dac7612.txt

@@ -0,0 +1,28 @@
+* Texas Instruments Dual, 12-Bit Serial Input Digital-to-Analog Converter
+
+The DAC7612 is a dual, 12-bit digital-to-analog converter (DAC) with guaranteed
+12-bit monotonicity performance over the industrial temperature range.
+Is is programmable through an SPI interface.
+
+The internal DACs are loaded when the LOADDACS pin is pulled down.
+
+http://www.ti.com/lit/ds/sbas106/sbas106.pdf
+
+Required Properties:
+- compatible: Should be one of:
+		"ti,dac7612"
+		"ti,dac7612u"
+		"ti,dac7612ub"
+- reg: Definition as per Documentation/devicetree/bindings/spi/spi-bus.txt
+
+Optional Properties:
+- ti,loaddacs-gpios: GPIO descriptor for the LOADDACS pin.
+- spi-*: Definition as per Documentation/devicetree/bindings/spi/spi-bus.txt
+
+Example:
+
+	dac@1 {
+		compatible = "ti,dac7612";
+		reg = <0x1>;
+		ti,loaddacs-gpios = <&msmgpio 25 GPIO_ACTIVE_LOW>;
+	};

Documentation/devicetree/bindings/iio/imu/bmi160.txt

@@ -9,9 +9,11 @@ Required properties:
  - spi-max-frequency : set maximum clock frequency (only for SPI)
 
 Optional properties:
- - interrupts : interrupt mapping for IRQ, must be IRQ_TYPE_LEVEL_LOW
+ - interrupts : interrupt mapping for IRQ
  - interrupt-names : set to "INT1" if INT1 pin should be used as interrupt
    input, set to "INT2" if INT2 pin should be used instead
+ - drive-open-drain : set if the specified interrupt pin should be configured as
+   open drain. If not set, defaults to push-pull.
 
 Examples:
 
@@ -20,7 +22,7 @@ bmi160@68 {
 	reg = <0x68>;
 
 	interrupt-parent = <&gpio4>;
-	interrupts = <12 IRQ_TYPE_LEVEL_LOW>;
+	interrupts = <12 IRQ_TYPE_EDGE_RISING>;
 	interrupt-names = "INT1";
 };
 

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -304,6 +304,7 @@ phytec	PHYTEC Messtechnik GmbH
 picochip	Picochip Ltd
 pine64	Pine64
 pixcir  PIXCIR MICROELECTRONICS Co., Ltd
+plantower Plantower Co., Ltd
 plathome	Plat'Home Co., Ltd.
 plda	PLDA
 plx	Broadcom Corporation (formerly PLX Technology)