Merge tag 'iio-for-v4.2b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

Second set of new driver, functionality and cleanups for IIO in the 4.2 cycle.

Core functionality
* i and q modifiers from quadrature channels.
* IIO_CHAN_INFO_OVERSAMPLING_RATIO added.
* High pass filter attributes added to mirror the existing low pass filter
  ones.

Core cleanups
* Make IIO tools building more cross compiler friendly.
* Substantial rework of the function __iio_update_buffers to greatly simplify
  a hideously evolved function.

New drivers and support
* ACPI0008 ambient light sensor driver. This one has been around a long time to
  will be good to finally get it into mainline.
* Berlin SOC ADC support.
* BMC150 magnetometer.  The accelerometer in the same package has been supported
  for quite some time, so good to have this half as well.
* m62332 DAC driver
* MEMSIC MMC35420 magnetometer.
* ROHM BH1710 and similar ambient light sensors.
* Sensortek STK3310 light sensor.
* Sensortek STK8312 accelerometer.
* Sensortek STK8BA50 accelerometer.
* ti-adc128s052 gains support form the adc122s021 2 channel ADC.

Driver cleanups and functionality.
* Allow various drivers to compile with !GPIOLIB if COMPILE_TEST enabled.
* bmc150 - decouple trigger from buffer to allow other triggers to be used.
* bmg160 - decouple trigger from buffer to allow other triggers to be used.
  Fix a trivial unused field.
* Constify a load of platform_device_id structures.
* inv_mpu6050 - device tree bindings.
* hid-sensors - fix a memory leak during probe if certain errors occur.
* ltr501 - illuminance channel derived (in an non obvious fashion) from the
  intensity channels.
* ltr501 - fix a boundary check on the proximity threshold.
* mlx90614 - drop a pointless return.
* mma8452 - Debugfs register access and fix a bug that had no effect (by
  coincidence)
* ti_am335x_adc - add device tree bindings for sample-delay, open-delay and
  averaging.  The ideal settings for these tend to be board design specific.

6 files changed, 172 insertions, 2 deletions

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 866b4ec4aab6..bbed111c31b4 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -71,6 +71,8 @@ Description:
 
 What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_raw
 What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_raw
+What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_i_raw
+What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_q_raw
 KernelVersion:	2.6.35
 Contact:	linux-iio@vger.kernel.org
 Description:
@@ -81,6 +83,11 @@ Description:
 		unique to allow association with event codes. Units after
 		application of scale and offset are millivolts.
 
+		Channels with 'i' and 'q' modifiers always exist in pairs and both
+		channels refer to the same signal. The 'i' channel contains the in-phase
+		component of the signal while the 'q' channel contains the quadrature
+		component.
+
 What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY-voltageZ_raw
 KernelVersion:	2.6.35
 Contact:	linux-iio@vger.kernel.org
@@ -246,8 +253,16 @@ What:		/sys/bus/iio/devices/iio:deviceX/in_accel_y_offset
 What:		/sys/bus/iio/devices/iio:deviceX/in_accel_z_offset
 What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_offset
 What:		/sys/bus/iio/devices/iio:deviceX/in_voltage_offset
+What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_i_offset
+What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_q_offset
+What:		/sys/bus/iio/devices/iio:deviceX/in_voltage_q_offset
+What:		/sys/bus/iio/devices/iio:deviceX/in_voltage_i_offset
 What:		/sys/bus/iio/devices/iio:deviceX/in_currentY_offset
 What:		/sys/bus/iio/devices/iio:deviceX/in_current_offset
+What:		/sys/bus/iio/devices/iio:deviceX/in_currentY_i_offset
+What:		/sys/bus/iio/devices/iio:deviceX/in_currentY_q_offset
+What:		/sys/bus/iio/devices/iio:deviceX/in_current_q_offset
+What:		/sys/bus/iio/devices/iio:deviceX/in_current_i_offset
 What:		/sys/bus/iio/devices/iio:deviceX/in_tempY_offset
 What:		/sys/bus/iio/devices/iio:deviceX/in_temp_offset
 What:		/sys/bus/iio/devices/iio:deviceX/in_pressureY_offset
@@ -273,14 +288,22 @@ Description:
 		to the _raw output.
 
 What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_scale
+What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_i_scale
+What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_q_scale
 What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_scale
 What:		/sys/bus/iio/devices/iio:deviceX/in_voltage_scale
+What:		/sys/bus/iio/devices/iio:deviceX/in_voltage_i_scale
+What:		/sys/bus/iio/devices/iio:deviceX/in_voltage_q_scale
 What:		/sys/bus/iio/devices/iio:deviceX/in_voltage-voltage_scale
 What:		/sys/bus/iio/devices/iio:deviceX/out_voltageY_scale
 What:		/sys/bus/iio/devices/iio:deviceX/out_altvoltageY_scale
 What:		/sys/bus/iio/devices/iio:deviceX/in_currentY_scale
 What:		/sys/bus/iio/devices/iio:deviceX/in_currentY_supply_scale
 What:		/sys/bus/iio/devices/iio:deviceX/in_current_scale
+What:		/sys/bus/iio/devices/iio:deviceX/in_currentY_i_scale
+What:		/sys/bus/iio/devices/iio:deviceX/in_currentY_q_scale
+What:		/sys/bus/iio/devices/iio:deviceX/in_current_i_scale
+What:		/sys/bus/iio/devices/iio:deviceX/in_current_q_scale
 What:		/sys/bus/iio/devices/iio:deviceX/in_accel_scale
 What:		/sys/bus/iio/devices/iio:deviceX/in_accel_peak_scale
 What:		/sys/bus/iio/devices/iio:deviceX/in_anglvel_scale
@@ -328,6 +351,10 @@ Description:
 
 What		/sys/bus/iio/devices/iio:deviceX/in_voltageY_calibscale
 What		/sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_calibscale
+What		/sys/bus/iio/devices/iio:deviceX/in_voltageY_i_calibscale
+What		/sys/bus/iio/devices/iio:deviceX/in_voltageY_q_calibscale
+What		/sys/bus/iio/devices/iio:deviceX/in_voltage_i_calibscale
+What		/sys/bus/iio/devices/iio:deviceX/in_voltage_q_calibscale
 What		/sys/bus/iio/devices/iio:deviceX/in_voltage_calibscale
 What		/sys/bus/iio/devices/iio:deviceX/in_accel_x_calibscale
 What		/sys/bus/iio/devices/iio:deviceX/in_accel_y_calibscale
@@ -420,6 +447,16 @@ Description:
 		to the underlying data channel, then this parameter
 		gives the 3dB frequency of the filter in Hz.
 
+What:		/sys/.../in_accel_filter_high_pass_3db_frequency
+What:		/sys/.../in_anglvel_filter_high_pass_3db_frequency
+What:		/sys/.../in_magn_filter_high_pass_3db_frequency
+KernelVersion:	4.2
+Contact:	linux-iio@vger.kernel.org
+Description:
+		If a known or controllable high pass filter is applied
+		to the underlying data channel, then this parameter
+		gives the 3dB frequency of the filter in Hz.
+
 What:		/sys/bus/iio/devices/iio:deviceX/out_voltageY_raw
 What:		/sys/bus/iio/devices/iio:deviceX/out_altvoltageY_raw
 KernelVersion:	2.6.37
@@ -880,6 +917,26 @@ Description:
 		met before an event is generated. If direction is not
 		specified then this period applies to both directions.
 
+What:		/sys/.../events/in_accel_thresh_rising_low_pass_filter_3db
+What:		/sys/.../events/in_anglvel_thresh_rising_low_pass_filter_3db
+What:		/sys/.../events/in_magn_thresh_rising_low_pass_filter_3db
+KernelVersion:	4.2
+Contact:	linux-iio@vger.kernel.org
+Description:
+		If a low pass filter can be applied to the event generation
+		this property gives its 3db frequency in Hz.
+		A value of zero disables the filter.
+
+What:		/sys/.../events/in_accel_thresh_rising_high_pass_filter_3db
+What:		/sys/.../events/in_anglvel_thresh_rising_high_pass_filter_3db
+What:		/sys/.../events/in_magn_thresh_rising_high_pass_filter_3db
+KernelVersion:	4.2
+Contact:	linux-iio@vger.kernel.org
+Description:
+		If a high pass filter can be applied to the event generation
+		this property gives its 3db frequency in Hz.
+		A value of zero disables the filter.
+
 What:		/sys/.../events/in_activity_still_thresh_rising_en
 What:		/sys/.../events/in_activity_still_thresh_falling_en
 What:		/sys/.../events/in_activity_walking_thresh_rising_en
@@ -1016,6 +1073,10 @@ What:		/sys/.../iio:deviceX/scan_elements/in_timestamp_en
 What:		/sys/.../iio:deviceX/scan_elements/in_voltageY_supply_en
 What:		/sys/.../iio:deviceX/scan_elements/in_voltageY_en
 What:		/sys/.../iio:deviceX/scan_elements/in_voltageY-voltageZ_en
+What:		/sys/.../iio:deviceX/scan_elements/in_voltageY_i_en
+What:		/sys/.../iio:deviceX/scan_elements/in_voltageY_q_en
+What:		/sys/.../iio:deviceX/scan_elements/in_voltage_i_en
+What:		/sys/.../iio:deviceX/scan_elements/in_voltage_q_en
 What:		/sys/.../iio:deviceX/scan_elements/in_incli_x_en
 What:		/sys/.../iio:deviceX/scan_elements/in_incli_y_en
 What:		/sys/.../iio:deviceX/scan_elements/in_pressureY_en
@@ -1034,6 +1095,10 @@ What:		/sys/.../iio:deviceX/scan_elements/in_incli_type
 What:		/sys/.../iio:deviceX/scan_elements/in_voltageY_type
 What:		/sys/.../iio:deviceX/scan_elements/in_voltage_type
 What:		/sys/.../iio:deviceX/scan_elements/in_voltageY_supply_type
+What:		/sys/.../iio:deviceX/scan_elements/in_voltageY_i_type
+What:		/sys/.../iio:deviceX/scan_elements/in_voltageY_q_type
+What:		/sys/.../iio:deviceX/scan_elements/in_voltage_i_type
+What:		/sys/.../iio:deviceX/scan_elements/in_voltage_q_type
 What:		/sys/.../iio:deviceX/scan_elements/in_timestamp_type
 What:		/sys/.../iio:deviceX/scan_elements/in_pressureY_type
 What:		/sys/.../iio:deviceX/scan_elements/in_pressure_type
@@ -1071,6 +1136,10 @@ Description:
 
 What:		/sys/.../iio:deviceX/scan_elements/in_voltageY_index
 What:		/sys/.../iio:deviceX/scan_elements/in_voltageY_supply_index
+What:		/sys/.../iio:deviceX/scan_elements/in_voltageY_i_index
+What:		/sys/.../iio:deviceX/scan_elements/in_voltageY_q_index
+What:		/sys/.../iio:deviceX/scan_elements/in_voltage_i_index
+What:		/sys/.../iio:deviceX/scan_elements/in_voltage_q_index
 What:		/sys/.../iio:deviceX/scan_elements/in_accel_x_index
 What:		/sys/.../iio:deviceX/scan_elements/in_accel_y_index
 What:		/sys/.../iio:deviceX/scan_elements/in_accel_z_index
@@ -1230,6 +1299,8 @@ Description:
 		or without compensation from tilt sensors.
 
 What:		/sys/bus/iio/devices/iio:deviceX/in_currentX_raw
+What:		/sys/bus/iio/devices/iio:deviceX/in_currentX_i_raw
+What:		/sys/bus/iio/devices/iio:deviceX/in_currentX_q_raw
 KernelVersion:	3.18
 Contact:	linux-iio@vger.kernel.org
 Description:
@@ -1238,6 +1309,11 @@ Description:
 		present, output should be considered as processed with the
 		unit in milliamps.
 
+		Channels with 'i' and 'q' modifiers always exist in pairs and both
+		channels refer to the same signal. The 'i' channel contains the in-phase
+		component of the signal while the 'q' channel contains the quadrature
+		component.
+
 What:		/sys/.../iio:deviceX/in_energy_en
 What:		/sys/.../iio:deviceX/in_distance_en
 What:		/sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_en
@@ -1375,3 +1451,15 @@ Description:
 		The emissivity ratio of the surface in the field of view of the
 		contactless temperature sensor.  Emissivity varies from 0 to 1,
 		with 1 being the emissivity of a black body.
+
+What:		/sys/bus/iio/devices/iio:deviceX/in_magn_x_oversampling_ratio
+What:		/sys/bus/iio/devices/iio:deviceX/in_magn_y_oversampling_ratio
+What:		/sys/bus/iio/devices/iio:deviceX/in_magn_z_oversampling_ratio
+KernelVersion:	4.2
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Hardware applied number of measurements for acquiring one
+		data point. The HW will do <type>[_name]_oversampling_ratio
+		measurements and return the average value as output data. Each
+		value resulted from <type>[_name]_oversampling_ratio measurements
+		is considered as one sample for <type>[_name]_sampling_frequency.
diff --git a/Documentation/devicetree/bindings/iio/adc/berlin2_adc.txt b/Documentation/devicetree/bindings/iio/adc/berlin2_adc.txt
new file mode 100644
index 000000000000..908334c6b07f
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/berlin2_adc.txt
@@ -0,0 +1,19 @@
+* Berlin Analog to Digital Converter (ADC)
+
+The Berlin ADC has 8 channels, with one connected to a temperature sensor.
+It is part of the system controller register set. The ADC node should be a
+sub-node of the system controller node.
+
+Required properties:
+- compatible: must be "marvell,berlin2-adc"
+- interrupts: the interrupts for the ADC and the temperature sensor
+- interrupt-names: should be "adc" and "tsen"
+
+Example:
+
+adc: adc {
+	compatible = "marvell,berlin2-adc";
+	interrupt-parent = <&sic>;
+	interrupts = <12>, <14>;
+	interrupt-names = "adc", "tsen";
+};
diff --git a/Documentation/devicetree/bindings/iio/adc/ti-adc128s052.txt b/Documentation/devicetree/bindings/iio/adc/ti-adc128s052.txt
index 42ca7deec97d..15ca6b47958e 100644
--- a/Documentation/devicetree/bindings/iio/adc/ti-adc128s052.txt
+++ b/Documentation/devicetree/bindings/iio/adc/ti-adc128s052.txt
@@ -1,7 +1,7 @@
-* Texas Instruments' ADC128S052 ADC chip
+* Texas Instruments' ADC128S052 and ADC122S021 ADC chip
 
 Required properties:
- - compatible: Should be "ti,adc128s052"
+ - compatible: Should be "ti,adc128s052" or "ti,adc122s021"
  - reg: spi chip select number for the device
  - vref-supply: The regulator supply for ADC reference voltage
 
diff --git a/Documentation/devicetree/bindings/iio/imu/inv_mpu6050.txt b/Documentation/devicetree/bindings/iio/imu/inv_mpu6050.txt
new file mode 100644
index 000000000000..e4d8f1c52f4a
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/imu/inv_mpu6050.txt
@@ -0,0 +1,17 @@
+InvenSense MPU-6050 Six-Axis (Gyro + Accelerometer) MEMS MotionTracking Device
+
+http://www.invensense.com/mems/gyro/mpu6050.html
+
+Required properties:
+ - compatible : should be "invensense,mpu6050"
+ - reg : the I2C address of the sensor
+ - interrupt-parent : should be the phandle for the interrupt controller
+ - interrupts : interrupt mapping for GPIO IRQ
+
+Example:
+	mpu6050@68 {
+		compatible = "invensense,mpu6050";
+		reg = <0x68>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <18 1>;
+	};
diff --git a/Documentation/devicetree/bindings/iio/magnetometer/bmc150_magn.txt b/Documentation/devicetree/bindings/iio/magnetometer/bmc150_magn.txt
new file mode 100644
index 000000000000..9f263b7df162
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/magnetometer/bmc150_magn.txt
@@ -0,0 +1,22 @@
+* Bosch BMC150 magnetometer sensor
+
+http://ae-bst.resource.bosch.com/media/products/dokumente/bmc150/BST-BMC150-DS000-04.pdf
+
+Required properties:
+
+  - compatible : should be "bosch,bmc150_magn"
+  - reg : the I2C address of the magnetometer
+
+Optional properties:
+
+  - interrupt-parent : phandle to the parent interrupt controller
+  - interrupts : interrupt mapping for GPIO IRQ
+
+Example:
+
+bmc150_magn@12 {
+        compatible = "bosch,bmc150_magn";
+        reg = <0x12>;
+        interrupt-parent = <&gpio1>;
+        interrupts = <0 1>;
+};
diff --git a/Documentation/devicetree/bindings/input/touchscreen/ti-tsc-adc.txt b/Documentation/devicetree/bindings/input/touchscreen/ti-tsc-adc.txt
index 6c4fb34823d3..b1163bf97146 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/ti-tsc-adc.txt
+++ b/Documentation/devicetree/bindings/input/touchscreen/ti-tsc-adc.txt
@@ -42,6 +42,27 @@ Optional properties:
 			 hardware knob for adjusting the amount of "settling
 			 time".
 
+- child "adc"
+	ti,chan-step-opendelay: List of open delays for each channel of
+				ADC in the order of ti,adc-channels. The
+				value corresponds to the number of ADC
+				clock cycles to wait after applying the
+				step configuration registers and before
+				sending the start of ADC conversion.
+				Maximum value is 0x3FFFF.
+       ti,chan-step-sampledelay: List of sample delays for each channel
+				  of ADC in the order of ti,adc-channels.
+				  The value corresponds to the number of
+				  ADC clock cycles to sample (to hold
+				  start of conversion high).
+				  Maximum value is 0xFF.
+       ti,chan-step-avg: Number of averages to be performed for each
+			  channel of ADC. If average is 16 then input
+			  is sampled 16 times and averaged to get more
+			  accurate value. This increases the time taken
+			  by ADC to generate a sample. Valid range is 0
+			  average to 16 averages. Maximum value is 16.
+
 Example:
 	tscadc: tscadc@44e0d000 {
 		compatible = "ti,am3359-tscadc";
@@ -55,5 +76,8 @@ Example:
 
 		adc {
 			ti,adc-channels = <4 5 6 7>;
+			ti,chan-step-opendelay = <0x098 0x3ffff 0x098 0x0>;
+			ti,chan-step-sampledelay = <0xff 0x0 0xf 0x0>;
+			ti,chan-step-avg = <16 2 4 8>;
 		};
 	}