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2016-03-12iio: adc: add NXP LPC18xx ADC driverJoachim Eastwood
Add base support for the 10-bit SAR ADC peripheral found on NXP LPC18xx/43xx SoCs. This is a minimal driver that does not support burst mode, interrupts, DMA or hardware triggers. User manual with register description can be found on: LPC18xx: www.nxp.com/documents/user_manual/UM10430.pdf LPC43xx: www.nxp.com/documents/user_manual/UM10503.pdf Signed-off-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-03-09iio: adc/imx25-gcq: Move incorrect do_divArnd Bergmann
The newly added driver uses do_div() to device a 32-bit number, which now provokes a warning: drivers/iio/adc/fsl-imx25-gcq.c: In function 'mx25_gcq_setup_cfgs': include/asm-generic/div64.h:207:28: warning: comparison of distinct pointer types lacks a cast (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ This replaces the do_div() call with a straight division operator. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 6df2e98c3ea5 ("iio: adc: Add imx25-gcq ADC driver") Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-03-05iio: adc: Fix build error of missing devm_ioremap_resource on UMKrzysztof Kozlowski
The devres.o gets linked if HAS_IOMEM is present so on ARCH=um allyesconfig (COMPILE_TEST) failed with: drivers/built-in.o: In function `at91_adc_probe': at91-sama5d2_adc.c:(.text+0x48f548): undefined reference to `devm_ioremap_resource' Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-03-05iio:adc:at91-sama5d2: fix identationLudovic Desroches
Remove some extra tabs. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-03-05iio:adc:at91-sama5d2: fix typoLudovic Desroches
Fix typo in the name of a macro. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-02-27iio: adc: palmas: Drop IRQF_EARLY_RESUME flagGrygorii Strashko
Palmas gpadc IRQs are nested threaded and this flag is not required for nested irqs anymore, since commit 3c646f2c6aa9 ("genirq: Don't suspend nested_thread irqs over system suspend") was merged. Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Peter Meerwald <pmeerw@pmeerw.net> Cc: Lee Jones <lee.jones@linaro.org> Cc: Nishanth Menon <nm@ti.com> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-02-27iio: convert to common i2c_check_functionality() return valueMatt Ranostay
Previously most drivers that used a i2c_check_functionality() check condition required various error codes on failure. This patchset converts to a standard of -EOPNOTSUPP Signed-off-by: Matt Ranostay <mranostay@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-02-24iio: ina2xx: Remove trace_printk debug statmentsAndrew F. Davis
These are generally for devlopment use only, remove these from performance-critical code, convert to dev_dbg elswhere. Signed-off-by: Andrew F. Davis <afd@ti.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-02-24iio: ina2xx: Fix whitespace and re-order codeAndrew F. Davis
Group of probably overly rigorous whitespace and code cleanups. - Alphabetize includes - Assign to variables in the order they are defined - Alignment issues - Group alike statements together - Use helper macros Signed-off-by: Andrew F. Davis <afd@ti.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-02-14Merge tag 'iio-for-4.6b' of ↵Greg Kroah-Hartman
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next Jonathan writes: 2nd round of new IIO device support, features and cleanups for the 4.6 cycle. New Device Support * Apex stx104 DAC - new driver for this PC104 board. Right now DAC support only. * ADI ad5064 - Add support for ad5625, ad5627, ad5645, ad5665, ad5667 DACs. - Add support for Linear Technology ltc2606, ltc2607, ltc2609, ltc2616, ltc2617, ltc2619, ltc2626, ltc2627 and ltc2629. * ADI ad7192 - add support for the ad7193 * Invensense mpu6050 - substantial rework of driver to use regmap allowing SPI support extending the now split driver to cover the MPU6000. * TI adc0832 - new driver supporting ADC0831, ADC0832, ADC0834 and ADC0838 ADCs. * TI ads1015 - new driver, note that there is an existing hwmon driver. The long term intention is to probably remove the hwmon driver but for now we just have guards in place to ensure this driver is not built if that one is enabled. * TI afe4403 - new driver for this heart rate monitor / pulse oximeter front end chip. * TI afe4404 - new driver for this heart rate monitor / pulse oximeter front end chip. Staging Graduations * mxs-lradc - A combined general purpose and touch screen (input) device driver. Originally held in staging to allow reworking into and MFD but as that wasn't happening and isn't an absolute requirement we are moving it out of staging. Driver new features * ms5611 - triggered buffer support - IIO_CHAN_INFO_SCALE to aid the triggered buffer support. Driver cleanups / reworks / fixes * ad5064 - Use an enum for the register map layout to allow support of additional chips (precursor to the new support listed above). - Structural driver changes to allow support of the slightly different handling for the ltc parts above. * ad5933 - drop an exceptional & unnecessary for a function pointer. * ad7606 - Cleanup the repeated copies of pm ops. - consolidate the various channels specs via a sport of rearranging so only one version is needed. * atlas ph sensor - add select IRQ_WORK * hmc8543 (soon to move out of staging) - Comment style fixes - functionality of suspend and resume was swapped. * spear-adc - use devm_clk_dev instead of managing the clk lifetime by hand. Core * Use new dmaengine_terminate_sync call to avoid a theoretical race. * Fix docs for mlock in struct iio_dev as it is correctly taken in some drivers (docs used to say for core only). * Add a helper function for calculating the scan index storage size within the core cutting out some cut and paste versions of the same code.
2016-02-13iio: adc: Add TI ADS1015 ADC driver supportDaniel Baluta
The driver has sysfs readings with runtime PM support for power saving. It also offers buffer support that can be used together with IIO software triggers. Datasheet can be found here: http://www.ti.com.cn/cn/lit/ds/symlink/ads1015.pdf Signed-off-by: Daniel Baluta <daniel.baluta@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-02-11iio: adc: Add imx25-gcq ADC driverMarkus Pargmann
This is a conversion queue driver for the mx25 SoC. It uses the central ADC which is used by two seperate independent queues. This driver prepares different conversion configurations for each possible input. For a conversion it creates a conversionqueue of one item with the correct configuration for the chosen channel. It then executes the queue once and disables the conversion queue afterwards. The reference voltages are configurable through devicetree subnodes, depending on the connections of the ADC inputs. Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Signed-off-by: Denis Carikli <denis@eukrea.com> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-02-10iio: adc: Move mxs-lradc out of stagingKsenija Stanojevic
Move mxs-lradc driver from drivers/staging/iio/adc to drivers/iio/adc. Signed-off-by: Ksenija Stanojevic <ksenija.stanojevic@gmail.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-02-09iio: adc: add support for ADC0831/ADC0832/ADC0834/ADC0838 chipsAkinobu Mita
This adds ADC0831/ADC0832/ADC0834/ADC0838 8-bit ADC driver. I have tested with ADC0831 and ADC0832. The remaining ADC0834 and ADC0838 are very similar to ADC0832. 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 <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-02-07Merge 4.5-rc3 into staging-nextGreg Kroah-Hartman
We want the upstream staging fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-01Merge tag 'iio-for-4.6a' of ↵Greg Kroah-Hartman
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next Jonathan writes: First round of new IIO device support, features and cleanups for the 4.6 cycle. Device Support * ad5761 - new driver * at91_sama5d2 ADC. - new driver and MAINTAINERS entry. - minor cleanups followed. * atlas pH-SM - new driver (this has possibly the prettiest data sheet I've ever seen) * mcp3422 - mcp3425 ADC added. * mcp4725 - mcp4726 DAC added. * mma8452 - mma8451q accelerometer added. * mpl115 - mpl115a1 added (a lot bigger than it seems as this is an SPI part whereas previous parts were i2c). * si7005 - Hoperf th02 (seems to be a repackaged part) * si7020 - Hoperf th06 (seems to be a repackaged part) New features * Core - IIO_PH type. Does what it says on the tin. * max30100 - LED current configuration support. * mcp320x - more differential measurement combinations. * mma8452 - free fall deteciton - opt3001 - enable operation without a IRQ line. - device tree docs. Somehow the original docs have disappeared down a rabbit hole, so here is a new set. * st-sensors - Support active-low interrupts. Cleanups and minor / not so minor reworks * Documentation - drop some defunct ABI from the docs in staging. * presure / Kconfig - white space cleanup. * ad7150 - BIT macro usage - Alignment fixes * ad7192 - false indent fixed. * ak8975 - constify the ak_def structures * axp288 - drop a redundant double const. * dht11 - substantial reliability improvements by being more tolerant of missing start bits. - simplify the decoding algorithm * mma8452 - whitespace cleanup * mpl115 - don't bother setting i2c_client_data as nothing uses it. * mpu6050 - drop unused function parameter. * opt3001 - extract integration time as constants. - trivial refactoring.
2016-02-01Merge tag 'iio-fixes-for-4.5b' 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 the 4.5 cycle. These ones are mostly dependent on patches from the recent merge cycle. * adc, imu and iio staging drivers - !HAS_IOMEM dependency fixes * dht11 - use boottime clock for time measurement to avoid incorrect measurements due to clock updates. * lidar - correct a return value for short i2c transfers.
2016-02-01Merge tag 'iio-fixes-for-4.5a' of ↵Greg Kroah-Hartman
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus Jonathan writes: First set of IIO fixes for the 4.5 cycle. This set comprises those not dependent on patches in the 4.5 merge cycle. A second set will follow shortly with ones that are. * core in kernel interfaces - fix a possible NULL dereference that is a theoretical possibility via odd usage of iio_channel_release. Pretty much a hardening of the interface, but observed in the wild with the twl4030_charger driver. * acpi-als - report the data as processed as it is in lux. This fixes a wrong use of the IIO ABI. However, old _raw version retained to avoid breaking any userspace in the wild that is relying on that (none known but it doesn't hurt us much to retain it) * ade7753 - fix some error handling to avoid use of unitialized data. * ltr501 - use a signed return type for ltr501_match_samp_freq so as to allow returning of an error code. * mcp4725 - set name field of struct iio_dev to ensure the sysfs name attribute doesn't give NULL. * mpl115 - temperature offset sign is wrong. * stk8ba50 - IIO_TRIGGER dependency added * ti_am335x_adc - Label buffer as a software buffer. It's actually a hybrid of a true hardware buffer feeding a kfifo, but the meaning of these fields has changed a little recently and in this case it should be labeled a software buffer ensure it is allowed to use the kfifo. * vf610_adc - HAS_IOMEM dependency
2016-01-30iio: adc: Fix dependencies for !HAS_IOMEM archsRichard Weinberger
Not every arch has io memory. So, unbreak the build by fixing the dependencies. Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-01-23iio: adc: axp288: remove redundant duplicate const on axp288_adc_channelsColin Ian King
duplicate const can be removed, it is redundant. Found by static analysis using smatch. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-01-23iio:adc:at91-sama5d2: code cleanupLudovic Desroches
Use var type for sizeof argument instead of the struct name. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-01-23iio:adc:at91-sama5d2: fix vref_uv typeLudovic Desroches
vref_uv has to be an int. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Reported-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-01-20Merge tag 'armsoc-multiplatform' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC multiplatform code updates from Arnd Bergmann: "This branch is the culmination of 5 years of effort to bring the ARMv6 and ARMv7 platforms together such that they can all be enabled and boot the same kernel. It has been a tremendous amount of cleanup and refactoring by a huge number of people, and creation of several new (and major) subsystems to better abstract out all the platform details in an appropriate manner. The bulk of this branch is a large patchset from Arnd that brings several of the more minor and older platforms we have closer to multiplatform support. Among these are MMP, S3C64xx, Orion5x, mv78xx0 and realview Much of this is moving around header files from old mach directories, but there are also some cleanup patches of debug_ll (lowlevel debug per-platform options) and other parts. Linus Walleij also has some patchs to clean up the older ARM Realview platforms by finally introducing DT support, and Rob Herring has some for ARM Versatile which is now DT-only. Both of these platforms are now multiplatform. Finally, a couple of patches from Russell for Dove PMU, and a fix from Valentin Rothberg for Exynos ADC, which were rebased on top of the series to avoid conflicts" * tag 'armsoc-multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (75 commits) ARM: realview: don't select SMP_ON_UP for UP builds ARM: s3c: simplify s3c_irqwake_{e,}intallow definition ARM: s3c64xx: fix pm-debug compilation iio: exynos-adc: fix irqf_oneshot.cocci warnings ARM: realview: build realview-dt SMP support only when used ARM: realview: select apropriate targets ARM: realview: clean up header files ARM: realview: make all header files local ARM: no longer make CPU targets visible separately ARM: integrator: use explicit core module options ARM: realview: enable multiplatform ARM: make default platform work for NOMMU ARM: debug-ll: move DEBUG_LL_UART_EFM32 to correct Kconfig location ARM: defconfig: use correct debug_ll settings ARM: versatile: convert to multi-platform ARM: versatile: merge mach code into a single file ARM: versatile: switch to DT only booting and remove legacy code ARM: versatile: add DT based PCI detection ARM: pxa: mark ezx structures as __maybe_unused ARM: pxa: mark raumfeld init functions as __maybe_unused ...
2016-01-16iio:adc:ti_am335x_adc Fix buffered mode by identifying as software buffer.Jonathan Cameron
Whilst this part has a hardware buffer, the identifcation that IIO cares about is the userspace facing end. It this case we push individual elements from the hardware fifo into the software interface (specifically a kfifo) rather than providing direct reads through to a hardware buffer (as we still do in the sca3000 for example). Technically the original specification as a hardware buffer could be considered wrong, but it didn't matter until the patch listed below. Result is that any attempt to enable the buffer will return -EINVAL Fixes: 225d59adf1c8 ("iio: Specify supported modes for buffers") Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-01-16iio: adc: mcp320x: support more differential voltage measurementAkinobu Mita
mcp320x driver supports the pseudo-differential mode by in_voltage'IN+'-voltage'IN-'_raw where (IN+, IN-) = (0, 1), (2, 3), ... mcp320x chips except MCP3X01 can also select swapped IN+ and IN- pairs in the pseudo-differential mode. i.e. in_voltage'IN+'-voltage'IN-'_raw where (IN+, IN-) = (1, 0), (3, 2), ... If the voltage level of IN+ is equal to or less than IN-, the resultant code will be 000h. So it is useful to provide these, too. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Oskar Andero <oskar.andero@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 <pmeerw@pmeerw.net> Cc: linux-iio@vger.kernel.org Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-01-16MAINTAINERS: add entry for Atmel SAMA5D2 ADC driverLudovic Desroches
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-01-16iio:adc:at91_adc8xx: introduce new atmel adc driverLudovic Desroches
This driver supports the new version of the Atmel ADC device introduced with the SAMA5D2 SoC family. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-01-04iio: add HAS_IOMEM dependency to VF610_ADCVegard Nossum
Ran into this on UML: drivers/built-in.o: In function `vf610_adc_probe': drivers/iio/adc/vf610_adc.c:744: undefined reference to `devm_ioremap_resource' devm_ioremap_resource() is defined only when HAS_IOMEM is selected. Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-01-02iio: adc: mcp3422: Add support for MCP3425Akinobu Mita
The MCP3425 is a single channel up to 16-bit A/D converter which has features: - On-Board Programmable Gain Amplifier (PGA): - Gains of 1, 2, 4 or 8 - Programmable Data Rate Options: - 15 SPS (16 bits), 60 SPS (14 bits), 240 SPS (12 bits) The mcp3422 driver also supports the MCP3421 which is a single channel. So we can support MCP3425 with a little changes to mcp3422 driver. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Angelo Compagnucci <angelo.compagnucci@gmail.com> Cc: Peter Meerwald <pmeerw@pmeerw.net> Cc: linux-iio@vger.kernel.org Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-12-26Merge tag 'iio-for-4.5c' of ↵Greg Kroah-Hartman
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next Jonathan writes: Third set of new stuff for IIO in the 4.5 cycle. New driver features - us5182 * Add interrupt support and rising / falling threshold events. Cleanups / fixes to new stuff / minor additions * Expose the IIO value formatting function for drivers to make use of internally. - ina2xx * Fix wrong channel order * Fix incorrect reporting of endianness * Adding documentation of ABI unique to this device - mma8452 * Drop an unused register description * Use an enum for the channel index to aid readability - sca3000 * Use standard NULL comparison style - us5182 * fix an inconsistency in status of enable (a bug with no real effect until above patches are applied) * refactor the read_raw function to improve maintainability / readability.
2015-12-26Merge tag 'iio-for-4.5b' of ↵Greg Kroah-Hartman
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next Jonathan writes: Second set of IIO new drivers, functionality and cleanups for the 4.5 cycle. The big one here is the configfs support which has been a long time in the works but should allow for cleaner ways to do instantiation of those elements of IIO that aren't directly connected to specific hardware. Lots of cool new stuff we can use this for in the works! New core stuff (basically all configfs support related) * Configfs support - Core support (was waiting for a configfs patch that went in around 4.4rc2) - A little fixlet to add a configfs.h to contain a reference to the configfs_subsystem structure. * Some infrastructure to simplify handling of software based triggers (i.e. ones with no actual hardware associated with them) * A high resolution timer based trigger. This has been around for years but until the configfs support was ready we didn't have a sensible way of instantiating instances of it (the method used for the sysfs_trigger has never been really satisfactory) New Device Support * AMS iAQ Volatile Organic Compounds sensor support. * Freescale imx7d ADC driver * Maxim MAX30100 oximeter driver (note that for these devices most of the smart stuff will be in userspace - effectively they are just light sensors with some interesting led synchronization as far as the kernel is concerned). * Microchip mcp3421 support added to the mcp3422 driver. * TI adc124s021 support added to the adc128s052 driver. * TI ina219, inda226 power monitors. Note that there is an existing hwmon driver for these parts, the usecase is somewhat different so it is unclear at this point if the hwmon driver will eventually be replaced by a bridge from this driver. In the meantime the Kconfig dependencies should prevent both from being built. New driver functionality * us8152d power management support. Cleanups, fixups * Use list_for_each_entry_safe instead of list_for_each_safe with the entry bit coded longhand. * Select IRQ_WORK for IIO_DUMMY_EVGEN. This is a fix that somehow got lost when the driver was moved so lets do it again. * st-accel - drop an unused define. * vz89x, lidar - optimize i2c transactions by using a single i2c tranfers instead of multiple calls where supported (fall back to smbus calls as before if not). * Use dev_get_platdata() in staging drivers: tsl2x7x, adcs and frequency drivers instead of direct access to the structure element.
2015-12-22iio: adc: ina2xx: Fix incorrect report of data endianness to userspace.Jonathan Cameron
This was extracted from a reposting of the driver after it had been applied to the IIO tree. I have fast tracked it as the driver will be in 4.5 and it would be nice to fix this trivial issue before it is. Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-12-21iio: exynos-adc: fix irqf_oneshot.cocci warningsValentin Rothberg
Since commit 1c6c69525b40 ("genirq: Reject bogus threaded irq requests") threaded IRQs without a primary handler need to be requested with IRQF_ONESHOT, otherwise the request will fail. So pass the IRQF_ONESHOT flag in this case. Generated by: scripts/coccinelle/misc/irqf_oneshot.cocci Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com> Signed-off-by: Olof Johansson <olof@lixom.net>
2015-12-19iio: ina2xx: fix channel order in software bufferMarc Titinger
POWER and CURRENT were swapped out in the buffer: was current2 and power3, correct order is power2 and current3. Signed-off-by: Marc Titinger <mtitinger@baylibre.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-12-13Merge 4.4-rc5 into staging-nextGreg Kroah-Hartman
We want those fixes in here for testing. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-12iio: adc: add IMX7D ADC driver supportHaibo Chen
Freescale i.MX7D soc contains a new ADC IP. This patch add this ADC driver support, and the driver only support ADC software trigger. Signed-off-by: Haibo Chen <haibo.chen@freescale.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-12-12iio: ina2xx: give the capture kthread a more useful name string.Marc Titinger
PID PPID USER STAT VSZ %VSZ %CPU COMMAND 144 2 root DW 0 0% 33% [ina226:1-8800us] 141 2 root DW 0 0% 25% [ina226:0-8800us] 40 2 root SW 0 0% 15% [irq/156-4802a00] 147 2 root DW 0 0% 7% [ina226:2-8800us] 145 1 root S 1236 0% 6% dd if /dev/iio:device1 of /dev/null 148 1 root S 1236 0% 4% dd if /dev/iio:device2 of /dev/null 149 137 root R 1244 0% 3% top -d 1 142 1 root S 1236 0% 2% dd if /dev/iio:device0 of /dev/null Signed-off-by: Marc Titinger <mtitinger@baylibre.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-12-12iio: ina2xx: re-instate a sysfs show/store for the shunt resistor valueMarc Titinger
Different probe modules use different resistor values. The front-end application may read a probe ID (from eeprom) and set the shunt value accordingly. Signed-off-by: Marc Titinger <mtitinger@baylibre.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-12-12iio: ina2xx: provide a sysfs parameter to allow async readout of the ADCsMarc Titinger
This can lead to repeated or skipped samples depending on the clock beat between the capture thread and the chip sampling clock, but will also spare reading/waiting for the Capture Ready Flag and improve the available i2c bandwidth for reading measurements. Output of iio_info: ...snip... 4 device-specific attributes found: attr 0: in_oversampling_ratio value: 4 attr 1: in_allow_async_readout value: 0 attr 2: integration_time_available value: 140 204 332 588 1100 2116... attr 3: in_sampling_frequency value: 114 Signed-off-by: Marc Titinger <mtitinger@baylibre.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-12-12iio: ina2xx: add support for TI INA2xx Power MonitorsMarc Titinger
in SOFTWARE buffer mode, a kthread will capture the active scan_elements into a kfifo, then compute the remaining time until the next capture tick and do an active wait (udelay). This will produce a stream of up to fours channels plus a 64bits timestamps (ns). Tested with ina226, on BeagleBoneBlack. Datasheet: http://www.ti.com/lit/gpn/ina226 Signed-off-by: Marc Titinger <mtitinger@baylibre.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-12-12iio:adc128s052: add support for adc124s021Oliver Stäbler
Signed-off-by: Oliver Stäbler <oliver.staebler@bytesatwork.ch> Reviewed-by: Martin Kepplinger <martink@posteo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-12-02iio: adc: mcp3422: Add mcp3421 supportSascha Hauer
The mcp3421 is the single channel variant of the mcp342x family. Support is straight forward, only the channels array has to be added for this chip. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-12-01iio: exynos-adc: add experimental touchscreen supportArnd Bergmann
This adds support for the touchscreen on Samsung s3c64xx. The driver is completely untested but shows roughly how it could be done, following the example of the at91 driver. compared to the old plat-samsung/adc driver, there is no support for prioritizing ts over other clients, nor for oversampling. From my reading of the code, the priorities didn't actually have any effect at all, but the oversampling might be needed. Verifying this driver is the main issue that is currently holding up multiplatform support for s3c64xx, so any help in testing is very much appreciated. The current version uses the IS_REACHABLE() that is going to be introduced in the linux-media tree, please comment this out for testing. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-12-01Merge tag 'iio-for-4.5a' of ↵Greg Kroah-Hartman
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next Jonathan writes: First set of new device support, features and cleanups for IIO in the 4.5 cycle Usual mixed bag, but the big item perhaps in this series is the DMA buffer support added by Lars-Peter Clausen. It's been in the works for a long time and it will be interesting to see what hardware support shows up now that this is available. New core features + associate cleanup. * Add generic DMA buffer infrastructure * Add a DMAengine framework based buffer Also associated minor changes. - Set the device buffer watermark based on the minimum watermark for all attached buffers rather than just the 'primary' one. - iio_buffer_init - only set the watermark default if one hasn't already been provided. This allows simple support for devices with a fixed watermark. - read only attribute for watermark on fixed watermark devices. - add explicit buffer enable/disable callbacks to allow the buffer to do more than trivial actions when it is being turned on and off. * IIO_VAL_INT support in write_raw_get_fmt function. New device support * Freescale MMA7455/7456L accelerometers * Memsic MXC6255XC accelerometer * ST lis2dh12 accelerometer * TI ADS8688 ADC * TI Palamas (twl6035/7) gpadc New driver features * mma8452 - support either of the available interrupt pins to cope with the case where board layout has lead to a particular one being connected. Staging graduation * Dummy driver - this driver acts as both an example and a test device for those with out hardware to develop userspace code against. Cleanups and minor bits and bobs. * treewide - Sort out the ordering of iio_device_register/unregister vs runtime pm function calls so that it's all nice and consistent and not race prone. - Check sscanf return values. None of the cases will actually happen as the strings are supplied internally, but best to be consistent on this. * ad7780 - switch over to the gpio descriptor interface and remove the now unused platform data which gets rid of a header entirely. * ad7793 - drop a pointless else statement. * at91_adc - Swap kmalloc_array in for a kmalloc doing the same job. * dummy - get rid of some commented out lines that snuck in during the move of the driver. * lm3533-als - Print an error message on provision of an invalid resistance. * mcp320x - Add compatible strings with vendor prefix and deprecate those with no vendor prefix. * mxs-lradc - Use BIT macro in various places rather than shifted ones. * pa12203001 - Power off the chip if the registration fails. * pulsedlight-lidar-lite - add runtime PM support. * xilinx XADC - constify an iio_buffer_setup_ops structure.
2015-11-22IIO: adc: at91_adc.c Prefer kmalloc_array over kmalloc with multiplyNizam Haider
So this patch swaps that use out for kmalloc_array instead. Signed-off-by Nizam Haider <nijamh@cdac.in> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-11-21iio: adc: spmi-vadc: add missing of_node_putJulia Lawall
for_each_available_child_of_node performs an of_node_get on each iteration, so a break out of the loop requires an of_node_put. A simplified version of the semantic patch that fixes this problem is as follows (http://coccinelle.lip6.fr): // <smpl> @@ expression root,e; local idexpression child; @@ for_each_available_child_of_node(root, child) { ... when != of_node_put(child) when != e = child ( return child; | + of_node_put(child); ? return ...; ) ... } // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-11-18Merge tag 'iio-fixes-for-4.4a' of ↵Greg Kroah-Hartman
ssh://ra.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus Jonathan writes: First set of IIO fixes for the 4.4 cycle. This set does not include those for issues introduced during the merge window. Fixes of those will follow in a future series. * ad5064 - Make sure the local i2c_write returns 0 on success rather than the number of bytes transfered. Otherwise we report an error on all writes. - Fix a shift for ad5629 and ad5669 which gives incorrect DAC output on these parts. * ad7793 - The product ID on the datasheet is wrong. Fix it in the driver. * IIO_DUMMY_EVGEN - select IRQ_WORK as a dependency. * lpc32xx - make sure clock is prepared before enabling. * si7020 - data byte order was reversed. Fix it. * vf610 - Internal temperature calculation was wrong if a different reference voltage was used. Now use a linear interpolation function to make it work over the full range. - Fix a division by zero in the case of a device tree property not being present (same issue two fixes). * xilinx XADC - VREFN scale was wrong - fix it.
2015-11-18iio: adc: xilinx: constify iio_buffer_setup_ops structureJulia Lawall
The iio_buffer_setup_ops structures are never modified, so declare this one as const, like the others. Done with the help of Coccinelle. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Acked-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-11-15iio: adc: xilinx: Fix VREFN scaleThomas Betker
The scaling factor for VREFN is 3.0/4096 (not 1.0/4096), just as for VREFP. This is not immediately obvious from the specification (Xilinx UG480), but has been confirmed by Xilinx support. Suggested-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Thomas Betker <thomas.betker@rohde-schwarz.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-11-15iio: adc: ad7793: removed unnecessary else.Nizam Haider
Else is not generally useful after a break or return. Signed-off-by: Nizam Haider <nijamh@cdac.in> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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