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2017-02-26Merge tag 'iio-fixes-for-4.11b' of ↵Greg Kroah-Hartman
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus Jonathan writes: Second set of IIO fixes for IIO in the 4.11 cycle. This series consists of fixes that either came in after the merge window had opened or are fixes for work that merged during the merge window so had to wait for that to hit mainline. * 104-quad-8 - Fix an off by one error in the register address for the flag register. * rcar-gyroadc - protect against possible issues in future by dealing with childmode not being in a valid state. This also deals with some build warnings. * xilinx - fix some error handling paths to ensure resources are released in reverse order of being acquired.
2017-02-25iio: adc: xilinx: Fix error handlingChristophe JAILLET
Reorder error handling labels in order to match the way resources have been allocated. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Acked-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-02-06Merge 4.10-rc7 into staging-nextGreg Kroah-Hartman
This resolves the merge errors that were reported in linux-next and it picks up the staging and IIO fixes that we need/want in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-05iio: adc: handle unknow of_device_id dataArnd Bergmann
If we get an unknown 'childmode' value, a number of variables are not initialized properly: drivers/iio/adc/rcar-gyroadc.c: In function 'rcar_gyroadc_probe': drivers/iio/adc/rcar-gyroadc.c:390:5: error: 'num_channels' may be used uninitialized in this function [-Werror=maybe-uninitialized] drivers/iio/adc/rcar-gyroadc.c:426:22: error: 'sample_width' may be used uninitialized in this function [-Werror=maybe-uninitialized] drivers/iio/adc/rcar-gyroadc.c:428:23: error: 'channels' may be used uninitialized in this function [-Werror=maybe-uninitialized] The driver is currently correct, but handling this properly is more robust for possible modifications. There is also a false-positive warning about adcmode being possibly uninitialized, but that cannot happen as we also check the 'first' flag: drivers/iio/adc/rcar-gyroadc.c:398:26: error: 'adcmode' may be used uninitialized in this function [-Werror=maybe-uninitialized] This adds an initialization for 'adcmode' and bails out for any unknown childmode. Fixes: 059c53b32329 ("iio: adc: Add Renesas GyroADC driver") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Marek Vasut <marek.vasut@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-02-01iio: stx104: Add GPIO set_multiple callback function supportWilliam Breathitt Gray
The Apex Embedded Systems STX104 series provides a digital output register where 4 lines may be set at a time. This patch add support for the set_multiple callback function, thus allowing multiple digital output lines to be set more efficiently in groups. Cc: Jonathan Cameron <jic23@kernel.org> Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-31iio: stx104: Add support for GPIO namesWilliam Breathitt Gray
This patch sets the gpio_chip names option with an array of GPIO line names that match the manual documentation for the Apex Embedded Systems STX104. This should make it easier for users to identify which GPIO line corresponds to a respective GPIO pin on the device. Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-30iio: stx104: Remove unneeded struct stx104_dev codeWilliam Breathitt Gray
The stx104_dev structure was used to hold private data for use in the stx104_remove function. Now that the stx104_remove function is gone, the stx104_dev structure and relevant code is no longer needed. This patch removes the unnecessary code. Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-29iio: adc: stm32: add optional dma supportFabrice Gasnier
Add DMA optional support to STM32 ADC, as there is a limited number DMA channels (request lines) that can be assigned to ADC. This way, driver may fall back using interrupts when all DMA channels are in use for other IPs. Use dma cyclic mode with two periods. Allow to tune period length by using watermark. Coherent memory is used for dma (max buffer size is fixed to PAGE_SIZE). Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-28iio: adc: stm32: add trigger polarity extended attributeFabrice Gasnier
Define extended attribute so that user may choose rising, falling or both edges for external trigger sources. Default to rising edge in case it isn't set. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-28iio: adc: stm32: Enable use of stm32 timer triggersFabrice Gasnier
STM32 ADC has external timer trigger sources. Use stm32 timer triggers API (e.g. is_stm32_timer_trigger()) with local ADC lookup table to validate a trigger can be used. This also provides correct trigger selection value (e.g. extsel). Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-28iio: adc: stm32: add support for triggered buffer modeFabrice Gasnier
STM32 ADC conversions can be launched using hardware triggers. It can be used to start conversion sequences (group of channels). Selected channels are select via sequence registers. Trigger source is selected via 'extsel' (external trigger mux). Trigger polarity is set to rising edge by default. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-28iio: stx104: Utilize devm_ functions in driver probe callbackWilliam Breathitt Gray
The devm_ resource manager functions allow memory to be automatically released when a device is unbound. This patch takes advantage of the resource manager functions and replaces the gpiochip_add_data call and iio_device_register call with the devm_gpiochip_add_data call and devm_iio_device_register call respectively. In addition, the stx104_remove function has been removed as no longer necessary due to the use of the relevant devm_ resource manager functions. Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-28iio: adc: add a driver for the SAR ADC found in Amlogic Meson SoCsMartin Blumenstingl
This adds support for the SAR (Successive Approximation Register) ADC on the Amlogic Meson SoCs. The code is based on the public S805 (Meson8b) and S905 (GXBB) datasheets (see [0] and [1]), as well as by reading (various versions of) the vendor driver and by inspecting the registers on the vendor kernels of my testing-hardware. Currently the GXBB, GXL and GXM SoCs are supported. GXBB hardware has 10-bit ADC resolution, while GXL and GXM have 12-bit ADC resolution. The code was written to support older SoCs (Meson8 and Meson8b) as well, but due to lack of actual testing-hardware no of_device_id was added for these. Two "features" from the vendor driver are currently missing: - the vendor driver uses channel #7 for calibration (this improves the accuracy of the results - in my tests the results were less than 3% off without calibration compared to the vendor driver). Adding support for this should be easy, but is not required for most applications. - channel #6 is connected to the SoCs internal temperature sensor. Adding support for this is probably not so easy since (based on the u-boot sources) most SoC versions are using different registers and algorithms for the conversion from "ADC value" to temperature. Supported by the hardware but currently not supported by the driver: - reading multiple channels at the same time (the hardware has a FIFO buffer which stores multiple results) - continuous sampling (this would require a way to enable this individually because otherwise the ADC would be drawing power constantly) - interrupt support (similar to the vendor driver this new driver is polling the results. It is unclear if the IRQ-mode is supported on older (Meson6 or Meson8) hardware as well or if there are any errata) [0] http://dn.odroid.com/S805/Datasheet/S805_Datasheet%20V0.8%2020150126.pdf [1] http://dn.odroid.com/S905/DataSheet/S905_Public_Datasheet_V1.1.4.pdf Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Tested-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-28iio: adc: Add Renesas GyroADC driverMarek Vasut
Add IIO driver for the Renesas RCar GyroADC block. This block is a simple 4/8-channel ADC which samples 12/15/24 bits of data every cycle from all channels. Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com> Cc: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Simon Horman <horms+renesas@verge.net.au> Cc: Jonathan Cameron <jic23@kernel.org> Cc: linux-renesas-soc@vger.kernel.org Cc: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-23Merge tag 'iio-for-4.11b' of ↵Greg Kroah-Hartman
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into work-next Jonathan writes: Second round of IIO new device support, cleanups and features for the 4.11 cycle New device support: * lsm6dsx imu - new driver and bindings. * max11100 adc - new driver and bindings. * tlc4541 - new driver * tmp007 thermopile - new driver. Core * in kernel interfaces - pass through raw values if no scaling provided and a processed value is requested. * trigger - close a race condition in acquiring trigger reference. - constify device_type structures. - rework the viio_trigger_alloc function to be much neater and easier to read. - free trigger resources correctly on some error paths. Avoids putting a module we don't have. Documentation * ABI - specify a unit for proximity measurements. Cleanups and features * ads1015 - constify iio_info structure. * ads7950 cleanups following merge in previous pull - Add device tree bindings - Drop the ti prefix from the module name in common with other drivers. - Change regulator name to vref to match datasheet and other drivers. * ak8974 - remove a redundant zero timeout check. * bmi160 - use variable names for sizeof instead of types. * cm3605 - mark PM functions as __maybe_unused to avoid a build warning. * isl29028 (on it's way towards moving out of staging). - alignment fixes and newline improvements. - combine proxim_get and read_proxim for simpler code. - drop unused ISL29028_DEV_ATTR macro - move some error logging into functions to cut out repitition. - make error messages more consistent. - tidy up some brackets. - drop the enable flag that nothing uses. - only set proximity rate and ALS scale when relevant channel type is enabled. - runtime pm support. * lsm6dsx - fix wrong values for gyro sensitivitiy. * mag3110 - claim direct mode during sysfs reads to avoid a race condition. * max1363 - export OF device table IDs as module aliases. * max30100 - use msleep for long uncritical delays. * mcp4531 - export OF device table as module aliases. * ms5611 - claim direct mode during sysfs reads to avoid a race condition. * opt3001 - export OF device table as module aliases. * sx9500 - claim direct mode during oversampling changes to avoid a race condition.
2017-01-22iio: adc: constify iio_info structuresBhumika Goyal
Declare iio_info structures as const as they are only stored in the info field of a iio_dev structure. This field is of type const, so iio_info structures having similar properties can be made const too. File size before: text data bss dec hex filename 6944 792 0 7736 1e38 drivers/iio/adc/ti-ads1015.o File size after: text data bss dec hex filename 7264 472 0 7736 1e38 drivers/iio/adc/ti-ads1015.o Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-22iio: adc: max1363: Export OF device ID table as module aliasesJavier Martinez Canillas
The I2C core always reports a MODALIAS of the form i2c:<foo> even if the device was registered via OF, this means that exporting the OF device ID table device aliases in the module is not needed. But in order to change how the core reports modaliases to user-space, it's better to export it. Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-22iio: adc: tlc4541: add support for TI tlc4541 adcPhil Reid
This adds TI's tlc4541 16-bit ADC driver. Which is a single channel ADC. Supports raw and trigger buffer access. Also supports the tlc3541 14-bit device, which has not been tested. Implementation of the tlc3541 is fairly straight forward thou. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Phil Reid <preid@electromag.com.au> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-21iio: adc: palmas_gpadc: retrieve a valid iio_dev in suspend/resumeAlison Schofield
The suspend/resume functions were using dev_to_iio_dev() to get the iio_dev. That only works on IIO dev's. Use dev_get_drvdata() for a platform device to get the correct iio_dev. Signed-off-by: Alison Schofield <amsfield22@gmail.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-21iio: adc: Add Maxim MAX11100 driverJacopo Mondi
Add iio driver for Maxim MAX11100 single-channel ADC. Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org> Tested-by: Marek Vasut <marek.vasut@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-19Merge tag 'iio-for-4.11a' of ↵Greg Kroah-Hartman
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next Jonathan writes: First round of new device support, features and cleanups for IIO in the 4.11 cycle. It's shaping to be another fairly busy cycle. Lots more on the way! New device support * ads7950 - new driver supporting ads7950, ads7951, ads7952, ads7953, ads7954, ads7955, ads7956, ads7957, ads7958, ads7959, ads7960, and ads7961 ADCs. * cm3605 - New driver for this light sensor and proximity sensor which is an analog part with some additional digital controls. * hx711 - New driver. Core new stuff * Gravity sensor type. This is a processed datastream in which the device will try to work out which way is down. * Split the buffer.h file into two parts. One provides the interface to 'use' a buffer, the second provides the internals of the buffer functionality as needed by implementations of buffers. - Move documentation inline so as to allow use of private: tag when generating documentation. - Add some utility functions for the few things that are directly done with the buffers. - Stop exporting functions that no-one uses outside of the core code. - Push docs down by the code in the c file where they should have always been. - Fix typo in kernel-doc for buffer. - push down some includes that were previously happening implicitly. - stop enabling the timestamp of the dummy device. Features and cleanups * ad5592r - ACPI support * ad5593r -ACPI support. * ad5933 - Fix a false comment about size of a particular register. * ad7150 - replace S_IRUGO | S_IWUSR with 0644. I'm not that keen on these patches in general, but as it was nicely presented I took this one anyway. As a general rule will only take these as part of a larger driver cleanup. - don't eat an error but rather reutnr it in the write_event_config callback. * ad7606 - replace non standard range attibute with _scale * ade7753 - use usleep_range for short sleeps * ade7754 - use usleep_range for short sleeps * ade7758 - use usleep_range for short sleeps * ade7759 - use usleep_range for short sleeps * ade7854 - use usleep_range for short sleeps * adis16201 - fix description * adis16203 - fix description - fix copyright year * adis16209 - fix description * adt7316 - Add braces to arms of if else statement (for consistency) - Alignment fixes. * axp288 - Fix up an issue with accidental overwrites of data. * bmi160 - add deivce tables for i2c and spi to support correctly identifying the full dt name (including manufacturer). - device tree binding. * bmp280 - use usleep_range for short sleeps. * cm3232 - return error from cm3232_reg_init rather than eating it if the last write fails. * dummy driver - remove a semicolor found at end of a function defintition. * exynos-adc - use usleep_range for short sleeps. * hid-sensor (accel) - Add timestamp support. The hardware can provide timestamps so lets support them. If not fall back to timestamps estimated in kernel. * hid-sensor (light) - Add a duplicate ID for the light channels so as to keep existing interface whilst also using the more standard IIO interface. * hts221 - acpi probing * imx25-gcq - Add a macro call to allow this driver to be automatically loaded. * isl29028 - reorganise code to avoid deep nesting of if statements. - move chip test and default regs into a function suitable or sharing with power management code. - tidy up some code alignment. * lidar-lite-v3 - introduce compatible strings that make it clear Garmin have consideral friends. * mma8452 - avoid returning signed value when unsigned is appropriate * spmi-vadc - Update function for generic voltage conversion to take into account that different channels on this device should be handled differently. - Rework code to allow per channel voltage scaling and support the standard options for this hardware. - Fixup three minor issues with the above patches for this part. These all effect test builds rather than the native builds for the part, but good to clean them up anyway. * st_sensors - support device matching from the ACPI DST tables. - acpi based probing for accelerometers - acpi based probing for pressure sensors - Allow pressure sensors to read negative values. - Export sampling frequency for lps25h and lps331ap. - Add support for the old DT bindings from the period when these deivces were often supported through windows. Docs fixup: * typo in sysfs-bus-iio
2017-01-15iio: adc: ti-ads7950: Change regulator matching string to "vref"David Lechner
This changes the reference voltage regulator matching string from "refin" to "vref". This is to be consistent with other A/DC chips that also use "vref-supply" in their device tree bindings. Signed-off-by: David Lechner <david@lechnology.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-15iio: adc: ti-ads7950: Drop "ti-" prefix from module nameDavid Lechner
This drops the "ti-" prefix from the module name. It makes the module name consistent with other iio ti-ads* drivers and it makes the driver work with device tree (the spi subsystem drops the "ti," prefix when matching compatible strings from device tree). Tested working on LEGO MINDSTORMS EV3 with the following device tree node: adc@3 { compatible = "ti,ads7957"; reg = <3>; #io-channel-cells = <1>; spi-max-frequency = <10000000>; vref-supply = <&adc_ref>; }; Signed-off-by: David Lechner <david@lechnology.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-10iio:adc:qcom-spmi-vadc: use div64_s64 instead of direct 64 bit division.Jonathan Cameron
Another one of these that we missed previously which prevents test builds of this driver on 32 bit platforms as it gives an undefined __divdi3 warning. Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-10iio:adc:qcom-spmi-vadc silence a long constant warning.Jonathan Cameron
It is meant to be long and is only added to an s64. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Cc: Rama Krishna Phani A <rphani@codeaurora.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-10iio:adc:qcom-spmi-vadc : fix undefined __divdi3Jonathan Cameron
A simple do_div call works here as all the signed 64 bit is actually small and unsigned at this point, and the numerator is u32. Introduce a temporary u64 variable to avoid type comparison warnings on some architectures. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Reported-by: kbuild test robot <fengguang.wu@intel.com> Cc: Rama Krishna Phani A <rphani@codeaurora.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-10iio: adc: hx711: Add IIO driver for AVIA HX711Andreas Klinger
This is the IIO driver for AVIA HX711 ADC which is mostly used in weighting cells. The protocol is quite simple and using GPIOs: One GPIO is used as clock (SCK) while another GPIO is read (DOUT) The raw value read from the chip is delivered. To get a weight one needs to subtract the zero offset and scale it. Signed-off-by: Andreas Klinger <ak@it-klinger.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-10iio: adc: axp288: Drop bogus AXP288_ADC_TS_PIN_CTRL register modificationsHans de Goede
For some reason the axp288_adc driver was modifying the AXP288_ADC_TS_PIN_CTRL register, changing bits 0-1 depending on whether the GP_ADC channel or another channel was written. These bits control when a bias current is send to the TS_PIN, the GP_ADC has its own pin and a separate bit in another register to control the bias current. Not only does changing when to enable the TS_PIN bias current (always or only when sampling) when reading the GP_ADC make no sense at all, the code is modifying these bits is writing the entire register, assuming that all the other bits have their default value. So if the firmware has configured a different bias-current for either pin, then that change gets clobbered by the write, likewise if the firmware has set bit 2 to indicate that the battery has no thermal sensor, this will get clobbered by the write. This commit fixes all this, by simply removing all writes to the AXP288_ADC_TS_PIN_CTRL register, they are not needed to read the GP_ADC pin, and can actually be harmful. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-10iio: adc: imx25-gcq: Fix module autoloadJavier Martinez Canillas
If the driver is built as a module, autoload won't work because the module alias information is not filled. So user-space can't match the registered device with the corresponding module. Export the module alias information using the MODULE_DEVICE_TABLE() macro. Before this patch: $ modinfo drivers/iio/adc/fsl-imx25-gcq.ko | grep alias $ After this patch: $ modinfo drivers/iio/adc/fsl-imx25-gcq.ko | grep alias alias: of:N*T*Cfsl,imx25-gcqC* alias: of:N*T*Cfsl,imx25-gcq Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-10iio:kfifo_buf header include push down.Jonathan Cameron
As a precursor to splitting buffer.h, lets make sure all drivers include the relevant headers rather than relying on picking them up from kfifo_buf.h. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
2016-12-30iio: adc: TI_AM335X_ADC should depend on HAS_DMAGeert Uytterhoeven
If NO_DMA=y: ERROR: "bad_dma_ops" [drivers/iio/adc/ti_am335x_adc.ko] undefined! Add a dependency on HAS_DMA to fix this. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Fixes: f438b9da (" drivers: iio: ti_am335x_adc: add dma support") Cc: <stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-12-10iio: adc: spmi-vadc: Changes to support different scalingRama Krishna Phani A
Several ADC channels are supported in PMIC which can be used to measure voltage, temperature, current etc. Different scaling can be applied on the obtained voltage to report in physical units. Scaling functionality can be different per channel. Add scaling support per channel. Every channel present in adc has an unique conversion formula for obtained voltage. Add support to report in Raw as well as in processed format. Scaling is applied when processed read is requested and is not applied when a Raw read is requested. Signed-off-by: Rama Krishna Phani A <rphani@codeaurora.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-12-10iio: adc: spmi-vadc: Update function for generic voltage conversionRama Krishna Phani A
Several channels are supported in ADC of PMIC which can be used to measure voltage, temperature, current etc., Hardware provides readings for all channels in adc code. That adc code needs to be converted to voltage. Logic for conversion of adc code to voltage is common for all ADC channels(voltage, temperature, current .,etc). Implement separate function for generic conversion logic. Signed-off-by: Rama Krishna Phani A <rphani@codeaurora.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-12-03iio: adc: New driver for TI ADS7950 chipsDavid Lechner
This adds a new driver for the TI ADS7950 family of ADC chips. These communicate using SPI and come in 8/10/12-bit and 4/8/12/16 channel varieties. Signed-off-by: David Lechner <david@lechnology.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-12-03IIO: Change msleep to usleep_range for small msecsAniroop Mathur
msleep(1~20) may not do what the caller intends, and will often sleep longer. (~20 ms actual sleep for any value given in the 1~20ms range) This is not the desired behaviour for many cases like device resume time, device suspend time, device enable time, data reading time, etc. Thus, change msleep to usleep_range for precise wakeups. Signed-off-by: Aniroop Mathur <a.mathur@samsung.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-11-19iio: adc: Add support for STM32 ADCFabrice Gasnier
This patch adds support for STMicroelectronics STM32 MCU's analog to digital converter. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-11-19iio: adc: Add support for STM32 ADC coreFabrice Gasnier
Add core driver for STMicroelectronics STM32 ADC (Analog to Digital Converter). STM32 ADC can be composed of up to 3 ADCs with shared resources like clock prescaler, common interrupt line and analog reference voltage. This core driver basically manages shared resources. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-11-13iio: envelope-detector: ADC driver based on a DAC and a comparatorPeter Rosin
The DAC is used to find the peak level of an alternating voltage input signal by a binary search using the output of a comparator wired to an interrupt pin. Like so: _ | \ input +------>-------|+ \ | \ .-------. | }---. | | | / | | dac|-->--|- / | | | |_/ | | | | | | | | irq|------<-------' | | '-------' Signed-off-by: Peter Rosin <peda@axentia.se> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-11-12iio:adc: ad7766: testing the wrong variable in probeDan Carpenter
We should be testing "ret" here. Fixes: aa16c6bd0e09 ("iio:adc: Add support for AD7766/AD7767") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-11-07Merge tag 'iio-for-4.10b' of ↵Greg Kroah-Hartman
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-testing Jonathan writes: Second round of new device support, cleanups and fixes for IIO in the 4.10 cycle This includes two branch merges for elements that may also go via MFD. New device support * cros_ec - new driver to support these Chrome OS contiguous sensors which are behind the Chrome OS embedded controller. Requires a few minor MFD and chrome platform changes. One follow up fix deals with some dependency issues in Kconfig. * mpu-3050 - new driver and device tree bindings for this venerable device. * st_accel - support for the lng2dm an Driver features * ad7192 - Add DVdd regulator handling * ad9832 - Add DVDD regulator handling * at91 - Suspend and resume support * si7020 - Device tree bindings * ti-am335x - DMA support - uses dma to accelerate short bursts of read back rather than full blown DMA buffer support. Greatly improved performance. Includes an MFD addition to give access to the address needed for DMA. * tsl2583 - Device tree bindings Cleanups and minor fixes * ad7192 - Fix regulator naming to match datasheet - Handle regulator errors correctly (so as to not break deferred probing) - Rename reg variable to reflect which regulator it is * ad5933 - Fix regulator naming to match datasheet - Handle regulator errors correctly (so as to not break deferred probing) * ad7746 - Fix a missing return value (fallout from previous patch set) * ad7780 - Fix regulator naming to match datasheet - Handle regulator errors correctly (so as to not break deferred probing) * ad9832 - Fix regulator naming to match datasheet - Handle regulator errors correctly (so as to not break deferred probing) - Rename reg regulator to reflect which one it is * ad9834 - Fix regulator naming to match datasheet - Handle regulator errors correctly (so as to not break deferred probing) * hts221 - Remove a duplicated include * maxim thermocouple - Handle a wrong storage side in read function. Prevent any problems that might be introduced by additions to this driver in future. * tsl2583 - big set from Brian Masney to drive this towards a staging graduation. - Convert to iio_chan_spec and read_raw / write_raw (in a couple of steps) - Improved error handling in various functions - Drop redundant power_state custom sysfs attribute. - Use IIO_*_ATTR* macros for remaining attributes. - Return an error code to userspace on invalid parameters being writen to sysfs files. - Add locking to various attribute accesses to remove possible races. - Add defines for various magic numbers. - Use smbus_read_byte_data instead of a write_byte followed by read_byte. - Query only relevant registers in probe. - Tidy up ordering of code comments. - Remove a pointless power off sequence in taos_chip_on. - Don't bother shutting down the chip when updating the lux table. The table is held entirely in the driver and doesn't effect the chip at all. - Drop a redundant i2c call in taos_als_calibrate where the same register is read twice in a row.
2016-11-05Merge branch 'ib-iio-mfd-ti335x_dma' into togregJonathan Cameron
A local branch created as Lee requested these two patches were applied in a fashion that would later let him merge the same branch into MFD if needed.
2016-11-05drivers: iio: ti_am335x_adc: add dma supportMugunthan V N
This patch adds the required pieces to ti_am335x_adc driver for DMA support Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com> Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-11-05iio: adc: at91: add suspend and resume callbackWenyou Yang
Add suspend/resume callback, support the pinctrl sleep state when the system suspend as well. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-10-30Merge 4.9-rc3 into staging-nextGreg Kroah-Hartman
This resolves a merge issue with drivers/staging/iio/accel/sca3000_core.c and we want the fixes all in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-23iio: ti-adc0832: add triggered buffer supportAkinobu Mita
This adds triggered buffer support for the ti-adc0832 driver. Tested with ADC0831 and ADC0832 by using SYSFS trigger. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Jonathan Cameron <jic23@kernel.org> Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-10-09iio: adc: ti-adc081c: Select IIO_TRIGGERED_BUFFER to prevent build errorsMika Westerberg
Commit 08e05d1fce5c ("ti-adc081c: Initial triggered buffer support") added triggered buffer support but that also requires CONFIG_IIO_TRIGGERED_BUFFER, otherwise we get errors from linker such as: drivers/built-in.o: In function `adc081c_remove': drivers/iio/adc/ti-adc081c.c:225: undefined reference to `iio_triggered_buffer_cleanup' Fix these by explicitly selecting both CONFIG_IIO_TRIGGERED_BUFFER and CONFIG_IIO_BUFFER in Kconfig for the driver. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-09-27iio: adc: ti-adc161s626: add regulator supportMatt Ranostay
Allow IIO_CHAN_INFO_SCALE and IIO_CHAN_INFO_OFFSET attributes for processing by checking voltage from a regulator. Signed-off-by: Matt Ranostay <matt@ranostay.consulting> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-09-27iio:adc: Add support for AD7766/AD7767Lars-Peter Clausen
Add support for the AD7766, AD7766-1, AD7766-2, AD7767, AD7767-1, AD7767-2 Analog to Digital converters. It's a family of single channel 24-bit SAR ADCs. They are all digital interface compatible and the main difference is the internal decimation rate and analog performance. For communication with the host processor a SPI interface is used. In addition the part has a data ready pin that is pulsed for one MCLK cycle when a conversion has completed and can be used as a IIO trigger. Datasheets: http://www.analog.com/media/en/technical-documentation/data-sheets/AD7766.pdf http://www.analog.com/media/en/technical-documentation/data-sheets/AD7767.pdf Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-09-27iio:max1027: Use iio_trigger_validate_own_device() helperLars-Peter Clausen
Use the new iio_trigger_validate_own_device() to verify that the trigger can only be attached to the matching IIO device rather than using a custom variant. While the implementation of iio_trigger_validate_own_device() and the custom variant and are not identical their behaviour is. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-09-24drivers: iio: max1027: Fix sparse warning: "dubious: x | !y"Sandhya Bankar
Fixing below warning: drivers/iio/adc/max1027.c:241:34: warning: dubious: x | !y . Signed-off-by: Sandhya Bankar <bankarsandhya512@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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