Merge tag 'iio-for-4.19b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

Second set of IIO new device support, features and cleanups.

There are also a couple of fixes that can wait for the coming merge
window.

Core new features

* Support for phase channels (used in time of flight sensors amongst
  other things)
* Support for deep UV light channel modifier.

New Device Support

* AD4758 DAC
  - New driver and dt bindings.
* adxl345
  - Support the adxl375 +-200g part which is register compatible.
* isl29501 Time of flight sensor.
  - New driver
* meson-saradc
  - Support the Meson8m2 Socs - right now this is just an ID, but there will
    be additional difference in future.
* mpu6050
  - New ID for 6515 variant.
* si1133 UV sensor.
  - New driver
* Spreadtrum SC27xx PMIC ADC
  - New driver and dt bindings.

Features

* adxl345
  - Add calibration offset readback and writing.
  - Add sampling frequency control.

Fixes and Cleanups

* ad5933
  - Use a macro for the channel definition to reduce duplication.
* ad9523
  - Replace use of core mlock with a local lock. Part of ongoing efforts
    to avoid confusing the purpose of mlock which is only about iio core
    state changes.
  - Fix displayed phase which was out by a factor of 10.
* adxl345
  - Add a link to the datasheet.
  - Rework the use of the address field in the chan_spec structures to
    allow addition of more per channel information.
* adis imu
  - Mark switch fall throughs.
* at91-sama5d2
  - Fix some casting on big endian systems.
* bmp280
  - Drop some DT elements that aren't used and should mostly be done from
    userspace rather than in DT.
* hx711
  - add clock-frequency dt binding and resulting delay to deal with capacitance
    issue on some boards.
  - fix a spurious unit-address in the example.
* ina2xx
  - Avoid a possible kthread_stop with a stale task_struct.
* ltc2632
  - Remove some unused local variables (assigned but value never used).
* max1363
  - Use device_get_match_data to remove some boilerplate.
* mma8452
  - Mark switch fall throughs.
* sca3000
  - Fix a missing return in a switch statement (a bad fallthrough
    previously!)
* sigma-delta-modulator
  - Drop incorrect unit address from the DT example.
* st_accel
  - Use device_get_match_data to drop some boiler plate.
  - Move to probe_new for i2c driver as second parameter not used.
* st_sensors library
  - Use a strlcpy (safe in this case).
* st_lsm6dsx
  - Add some error logging.
* ti-ads7950
  - SPDX
  - Allow simultaneous buffered and polled reads. Needed on a Lego Mindstorms
    EV3 where some channels are used for power supply monitoring at a very low
    rate.
* ti-dac5571
  - Remove an unused variable.
* xadc
  - Drop some dead code.

12 files changed, 223 insertions, 13 deletions

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index c7353030670a..a5b4f223641d 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -1307,13 +1307,16 @@ What:		/sys/.../iio:deviceX/in_intensityY_raw
 What:		/sys/.../iio:deviceX/in_intensityY_ir_raw
 What:		/sys/.../iio:deviceX/in_intensityY_both_raw
 What:		/sys/.../iio:deviceX/in_intensityY_uv_raw
+What:		/sys/.../iio:deviceX/in_intensityY_duv_raw
 KernelVersion:	3.4
 Contact:	linux-iio@vger.kernel.org
 Description:
 		Unit-less light intensity. Modifiers both and ir indicate
 		that measurements contain visible and infrared light
-		components or just infrared light, respectively. Modifier uv indicates
-		that measurements contain ultraviolet light components.
+		components or just infrared light, respectively. Modifier
+		uv indicates that measurements contain ultraviolet light
+		components. Modifier duv indicates that measurements
+		contain deep ultraviolet light components.
 
 What:		/sys/.../iio:deviceX/in_uvindex_input
 KernelVersion:	4.6
@@ -1675,3 +1678,10 @@ KernelVersion:	4.12
 Contact:	linux-iio@vger.kernel.org
 Description:
 		Raw counter device counters direction for channel Y.
+
+What:		/sys/bus/iio/devices/iio:deviceX/in_phaseY_raw
+KernelVersion:	4.18
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Raw (unscaled) phase difference reading from channel Y
+		that can be processed to radians.
\ No newline at end of file
diff --git a/Documentation/ABI/testing/sysfs-bus-iio-isl29501 b/Documentation/ABI/testing/sysfs-bus-iio-isl29501
new file mode 100644
index 000000000000..d009cfbbd72b
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-iio-isl29501
@@ -0,0 +1,47 @@
+What:		/sys/bus/iio/devices/iio:deviceX/in_proximity0_agc_gain
+What:		/sys/bus/iio/devices/iio:deviceX/in_proximity0_agc_gain_bias
+KernelVersion:	4.18
+Contact:	linux-iio@vger.kernel.org
+Description:
+		This sensor has an automatic gain control (agc) loop
+		which sets the analog signal levels at an optimum
+		level by controlling programmable gain amplifiers. The
+		criteria for optimal gain is determined by the sensor.
+
+		Return the actual gain value as an integer in [0; 65536]
+		range when read from.
+
+		The agc gain read when measuring crosstalk shall be
+		written into in_proximity0_agc_gain_bias.
+
+What:		/sys/bus/iio/devices/iio:deviceX/in_proximity0_calib_phase_temp_a
+What:		/sys/bus/iio/devices/iio:deviceX/in_proximity0_calib_phase_temp_b
+What:		/sys/bus/iio/devices/iio:deviceX/in_proximity0_calib_phase_light_a
+What:		/sys/bus/iio/devices/iio:deviceX/in_proximity0_calib_phase_light_b
+KernelVersion:	4.18
+Contact:	linux-iio@vger.kernel.org
+Description:
+		The sensor is able to perform correction of distance
+		measurements due to changing temperature and ambient
+		light conditions. It can be programmed to correct for
+		a second order error polynomial.
+
+		Phase data has to be collected when temperature and
+		ambient light are modulated independently.
+
+		Then a least squares curve fit to a second order
+		polynomial has to be generated from the data. The
+		resultant curves have the form ax^2 + bx + c.
+
+		From those two curves, a and b coefficients shall be
+		stored in in_proximity0_calib_phase_temp_a and
+		in_proximity0_calib_phase_temp_b for temperature and
+		in in_proximity0_calib_phase_light_a and
+		in_proximity0_calib_phase_light_b for ambient light.
+
+		Those values must be integer in [0; 8355840] range.
+
+		Finally, the c constant is set by the sensor
+		internally.
+
+		The value stored in sensor is displayed when read from.
diff --git a/Documentation/ABI/testing/sysfs-bus-iio-light-si1133 b/Documentation/ABI/testing/sysfs-bus-iio-light-si1133
new file mode 100644
index 000000000000..6f130cdb26a6
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-iio-light-si1133
@@ -0,0 +1,22 @@
+What:		/sys/bus/iio/devices/iio:deviceX/in_intensity_ir_small_raw
+KernelVersion:	4.18
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Unit-less infrared intensity. The intensity is measured from 1
+		dark photodiode. "small" indicate the surface area capturing
+		infrared.
+
+What:		/sys/bus/iio/devices/iio:deviceX/in_intensity_ir_large_raw
+KernelVersion:	4.18
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Unit-less infrared intensity. The intensity is measured from 4
+		dark photodiodes. "large" indicate the surface area capturing
+		infrared.
+
+What:		/sys/bus/iio/devices/iio:deviceX/in_intensity_large_raw
+KernelVersion:	4.18
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Unit-less light intensity with more diodes.
+
diff --git a/Documentation/devicetree/bindings/iio/accel/adxl345.txt b/Documentation/devicetree/bindings/iio/accel/adxl345.txt
index e7111b02c02c..bb7fc0bd5776 100644
--- a/Documentation/devicetree/bindings/iio/accel/adxl345.txt
+++ b/Documentation/devicetree/bindings/iio/accel/adxl345.txt
@@ -1,9 +1,12 @@
-Analog Devices ADXL345 3-Axis, +/-(2g/4g/8g/16g) Digital Accelerometer
+Analog Devices ADXL345/ADXL375 3-Axis Digital Accelerometers
 
 http://www.analog.com/en/products/mems/accelerometers/adxl345.html
+http://www.analog.com/en/products/sensors-mems/accelerometers/adxl375.html
 
 Required properties:
- - compatible : should be "adi,adxl345"
+ - compatible : should be one of
+		"adi,adxl345"
+		"adi,adxl375"
  - reg : the I2C address or SPI chip select number of the sensor
 
 Required properties for SPI bus usage:
diff --git a/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.txt b/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.txt
index d1acd5ea2737..54b823f3a453 100644
--- a/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.txt
+++ b/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.txt
@@ -4,6 +4,7 @@ Required properties:
 - compatible:	depending on the SoC this should be one of:
 			- "amlogic,meson8-saradc" for Meson8
 			- "amlogic,meson8b-saradc" for Meson8b
+			- "amlogic,meson8m2-saradc" for Meson8m2
 			- "amlogic,meson-gxbb-saradc" for GXBB
 			- "amlogic,meson-gxl-saradc" for GXL
 			- "amlogic,meson-gxm-saradc" for GXM
diff --git a/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt b/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt
index b3629405f568..7222328a3d0d 100644
--- a/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt
+++ b/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt
@@ -8,11 +8,17 @@ Required properties:
 		See Documentation/devicetree/bindings/gpio/gpio.txt
  - avdd-supply:	Definition of the regulator used as analog supply
 
+Optional properties:
+ - clock-frequency:	Frequency of PD_SCK in Hz
+			Minimum value allowed is 10 kHz because of maximum
+			high time of 50 microseconds.
+
 Example:
-weight@0 {
+weight {
 	compatible = "avia,hx711";
 	sck-gpios = <&gpio3 10 GPIO_ACTIVE_HIGH>;
 	dout-gpios = <&gpio0 7 GPIO_ACTIVE_HIGH>;
 	avdd-suppy = <&avdd>;
+	clock-frequency = <100000>;
 };
 
diff --git a/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.txt b/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.txt
index ba24ca7ba95e..59b92cd32552 100644
--- a/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.txt
+++ b/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.txt
@@ -7,7 +7,7 @@ Required properties:
 
 Example node:
 
-	ads1202: adc@0 {
+	ads1202: adc {
 		compatible = "sd-modulator";
 		#io-channel-cells = <0>;
 	};
diff --git a/Documentation/devicetree/bindings/iio/adc/sprd,sc27xx-adc.txt b/Documentation/devicetree/bindings/iio/adc/sprd,sc27xx-adc.txt
new file mode 100644
index 000000000000..8aad960de50b
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/sprd,sc27xx-adc.txt
@@ -0,0 +1,36 @@
+Spreadtrum SC27XX series PMICs ADC binding
+
+Required properties:
+- compatible: Should be one of the following.
+	"sprd,sc2720-adc"
+	"sprd,sc2721-adc"
+	"sprd,sc2723-adc"
+	"sprd,sc2730-adc"
+	"sprd,sc2731-adc"
+- reg: The address offset of ADC controller.
+- interrupt-parent: The interrupt controller.
+- interrupts: The interrupt number for the ADC device.
+- #io-channel-cells: Number of cells in an IIO specifier.
+- hwlocks: Reference to a phandle of a hwlock provider node.
+
+Example:
+
+	sc2731_pmic: pmic@0 {
+		compatible = "sprd,sc2731";
+		reg = <0>;
+		spi-max-frequency = <26000000>;
+		interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		pmic_adc: adc@480 {
+			compatible = "sprd,sc2731-adc";
+			reg = <0x480>;
+			interrupt-parent = <&sc2731_pmic>;
+			interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
+			#io-channel-cells = <1>;
+			hwlocks = <&hwlock 4>;
+		};
+	};
diff --git a/Documentation/devicetree/bindings/iio/dac/ad5758.txt b/Documentation/devicetree/bindings/iio/dac/ad5758.txt
new file mode 100644
index 000000000000..bba01a5cab1b
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/ad5758.txt
@@ -0,0 +1,78 @@
+Analog Devices AD5758 DAC device driver
+
+Required properties for the AD5758:
+	- compatible: Must be "adi,ad5758"
+	- reg: SPI chip select number for the device
+	- spi-max-frequency: Max SPI frequency to use (< 50000000)
+	- spi-cpha: is the only mode that is supported
+
+Required properties:
+
+ - adi,dc-dc-mode: Mode of operation of the dc-to-dc converter
+		   Dynamic Power Control (DPC)
+		   In this mode, the AD5758 circuitry senses the output
+		   voltage and dynamically regulates the supply voltage,
+		   VDPC+, to meet compliance requirements plus an optimized
+		   headroom voltage for the output buffer.
+
+		   Programmable Power Control (PPC)
+		   In this mode, the VDPC+ voltage is user-programmable to
+		   a fixed level that needs to accommodate the maximum output
+		   load required.
+
+		   The output of the DAC core is either converted to a
+		   current or voltage output at the VIOUT pin. Only one mode
+		   can be enabled at any one time.
+
+		   The following values are currently supported:
+			* 1: DPC current mode
+			* 2: DPC voltage mode
+			* 3: PPC current mode
+
+ Depending on the selected output mode (voltage or current) one of the
+ two properties must
+ be present:
+
+ - adi,range-microvolt: Voltage output range
+		The array of voltage output ranges must contain two fields:
+		* <0 5000000>: 0 V to 5 V voltage range
+		* <0 10000000>: 0 V to 10 V voltage range
+		* <(-5000000) 5000000>: ±5 V voltage range
+		* <(-10000000) 10000000>: ±10 V voltage range
+ - adi,range-microamp: Current output range
+		The array of current output ranges must contain two fields:
+		* <0 20000>: 0 mA to 20 mA current range
+		* <0 24000>: 0 mA to 24 mA current range
+		* <4 24000>: 4 mA to 20 mA current range
+		* <(-20000) 20000>: ±20 mA current range
+		* <(-24000) 24000>: ±24 mA current range
+		* <(-1000) 22000>: −1 mA to +22 mA current range
+
+Optional properties:
+
+ - adi,dc-dc-ilim-microamp: The dc-to-dc converter current limit
+		   The following values are currently supported [uA]:
+			* 150000
+			* 200000
+			* 250000
+			* 300000
+			* 350000
+			* 400000
+
+ - adi,slew-time-us: The time it takes for the output to reach the
+ full scale [uS]
+		     The supported range is between 133us up to 1023984375us
+
+AD5758 Example:
+
+	dac@0 {
+		compatible = "adi,ad5758";
+		reg = <0>;
+		spi-max-frequency = <1000000>;
+		spi-cpha;
+
+		adi,dc-dc-mode = <2>;
+		adi,range-microvolt = <0 10000000>;
+		adi,dc-dc-ilim-microamp = <200000>;
+		adi,slew-time-us = <125000>;
+	};
diff --git a/Documentation/devicetree/bindings/iio/imu/inv_mpu6050.txt b/Documentation/devicetree/bindings/iio/imu/inv_mpu6050.txt
index 5f4777e8cc9e..b7def51c8ad9 100644
--- a/Documentation/devicetree/bindings/iio/imu/inv_mpu6050.txt
+++ b/Documentation/devicetree/bindings/iio/imu/inv_mpu6050.txt
@@ -6,6 +6,7 @@ Required properties:
  - compatible : should be one of
 		"invensense,mpu6050"
  		"invensense,mpu6500"
+		"invensense,mpu6515"
 		"invensense,mpu9150"
 		"invensense,mpu9250"
 		"invensense,mpu9255"
diff --git a/Documentation/devicetree/bindings/iio/light/isl29501.txt b/Documentation/devicetree/bindings/iio/light/isl29501.txt
new file mode 100644
index 000000000000..46957997fee3
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/light/isl29501.txt
@@ -0,0 +1,13 @@
+* ISL29501 Time-of-flight sensor.
+
+Required properties:
+
+  - compatible : should be "renesas,isl29501"
+  - reg : the I2C address of the sensor
+
+Example:
+
+isl29501@57 {
+	compatible = "renesas,isl29501";
+	reg = <0x57>;
+};
diff --git a/Documentation/devicetree/bindings/iio/pressure/bmp085.txt b/Documentation/devicetree/bindings/iio/pressure/bmp085.txt
index c7198a03c906..abcab02504fb 100644
--- a/Documentation/devicetree/bindings/iio/pressure/bmp085.txt
+++ b/Documentation/devicetree/bindings/iio/pressure/bmp085.txt
@@ -8,10 +8,6 @@ Required properties:
   "bosch,bme280"
 
 Optional properties:
-- chip-id: configurable chip id for non-default chip revisions
-- temp-measurement-period: temperature measurement period (milliseconds)
-- default-oversampling: default oversampling value to be used at startup,
-  value range is 0-3 with rising sensitivity.
 - interrupt-parent: should be the phandle for the interrupt controller
 - interrupts: interrupt mapping for IRQ
 - reset-gpios: a GPIO line handling reset of the sensor: as the line is
@@ -24,9 +20,6 @@ Example:
 pressure@77 {
 	compatible = "bosch,bmp085";
 	reg = <0x77>;
-	chip-id = <10>;
-	temp-measurement-period = <100>;
-	default-oversampling = <2>;
 	interrupt-parent = <&gpio0>;
 	interrupts = <25 IRQ_TYPE_EDGE_RISING>;
 	reset-gpios = <&gpio0 26 GPIO_ACTIVE_LOW>;