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2013-09-18iio: at91: fix adc_clk overflowJosh Wu
The adc_clk variable is currently defined using a 32-bits unsigned integer, which will overflow under some very valid range of operations. Such overflow will occur if, for example, the parent clock is set to a 20MHz frequency and the ADC startup time is larger than 215ns. To fix this, introduce an intermediate variable holding the clock rate in kHz. Signed-off-by: Josh Wu <josh.wu@atmel.com> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-16iio:max1361: Use default triggered buffer setup opsLars-Peter Clausen
The max1361 driver uses the same callbacks as the triggered buffer default buffer setup ops, so just remove the max1361 specific ops and let it use the default ops. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-15iio: Remove unnecessary casts for iio_push_to_buffers()Lars-Peter Clausen
Now that iio_push_to_buffers() takes a void pointer for the data parameter we can remove those casts to u8*. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-15iio: iio_push_to_buffers(): Change type of 'data' to const void *Lars-Peter Clausen
Change the type of the 'data' parameter for iio_push_to_buffers() from 'u8 *' to 'const void *'. Drivers typically use the correct type (e.g. __be16 *) for their data buffer. When passing the buffer to iio_push_to_buffers() it needs to be cast to 'u8 *' for the compiler to not complain (and also having to add __force if we want to keep sparse happy as well). Since the buffer implementation should not care about the data layout (except the size of one sample) using a void pointer is the correct thing to do. Also make it const as the buffer implementations are not supposed to modify it. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-15iio:buffer_cb: Constify iio_cb_accessLars-Peter Clausen
The iio_cb_access struct is never modified so we can mark it as const. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-15iio: Fix tcs3472 buffer sizePeter Meerwald
and drop obsolete #define Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-15iio:temperature:tmp006 put sampling_frequency in info_mask_shared_by_allJonathan Cameron
Doing this makes it possible to access this control from within the kernel. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Acked-by: Peter Meerwald <pmeerw@pmeerw.net> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
2013-09-15iio: add info_mask_[shared_by_dir/shared_by_all]Jonathan Cameron
These two additional info_mask bitmaps should allow all 'standard' numeric attributes to be handled using the read_raw and write_raw callbacks. Whilst this should reduce code, the more important element is that this makes these values easily accessible to in kernel users of IIO devices. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
2013-09-15iio: refactor info mask and ext_info attribute creation.Jonathan Cameron
Introduce an enum to specify whether the attribute is separate or shared. Factor out the bitmap handling for loop into a separate function. Tidy up error handling and add a NULL assignment to squish a false positive warning from GCC. Change ext_info shared type from boolean to enum and update in all drivers. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
2013-09-15iio:kfifo_buf: Use wake_up_interruptible_poll()Lars-Peter Clausen
Use wake_up_interruptible_poll() instead of wake_up_interruptible() to only wake up those threads that listen for input poll notifications. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-15iio:buffer: Simplify iio_buffer_is_active()Lars-Peter Clausen
We can skip having to loop through all the device's buffers to see if a certain buffer is active, if we let the buffer's list head point to itself when the buffer is inactive. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-15iio: use anon_inode_getfd() with O_CLOEXEC flagYann Droneaud
IIO uses anon_inode_get() to allocate file descriptors as part of its ioctls. But those ioctls are lacking a flag argument allowing userspace to choose options for the newly opened file descriptor. In such case it's advised to use O_CLOEXEC by default so that userspace is allowed to choose, without race, if the file descriptor is going to be inherited across exec(). KVM usage of anon_inode_getfd() was fixed in a previous patchset [1], so IIO is the only subsystem using anon_inode_getfd() with a fixed set of flags not including O_CLOEXEC. This patch set O_CLOEXEC flag on the event file descriptor created with anon_inode_getfd() to not leak file descriptors across exec(). Links: - Secure File Descriptor Handling (Ulrich Drepper, 2008) http://udrepper.livejournal.com/20407.html - Excuse me son, but your code is leaking !!! (Dan Walsh, March 2012) http://danwalsh.livejournal.com/53603.html - [1] kvm: use anon_inode_getfd() with O_CLOEXEC flag http://lkml.kernel.org/r/cover.1377372576.git.ydroneaud@opteya.com Signed-off-by: Yann Droneaud <ydroneaud@opteya.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-15iio: gp2ap020a00f: Add a driver for the deviceJacek Anaszewski
Add a new driver for the ambient light/proximity sensor device. The driver exposes three channels: light_clear light_ir and proximity. It also supports triggered buffer, high and low ambient light threshold event and proximity detection events. Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-14iio: Add tcs3472 color light sensor driverPeter Meerwald
chip has four 16-bit channels for red, green, blue, clear color intensity; driver supports the TCS3x7x family of devices and was tested with a TCS34725 chip; further information here: http://www.ams.com/eng/Products/Light-Sensors/Color-Sensor/TCS34725 v2 (thanks to Jonathan Cameron): * drop dynamic buffer allocation, buffer is in tcs3472_data * limit sysfs output to PAGE_SIZE * check val2 == 0 when writing CALIBSCALE Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Cc: Jon Brenner <jon.brenner@ams.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-14iio: pressure-core: st: Allow for number of channels to varyLee Jones
At the moment the number of channels specified is dictated by the first sensor supported by the driver. As we add support for more sensors this is likely to vary. Instead of using the ARRAY_SIZE() of the LPS331AP's channel specifier we'll use a new adaptable 'struct st_sensors' element instead. Signed-off-by: Lee Jones <lee.jones@linaro.org> Acked-by: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-14iio: pressure-core: st: Expand and rename LPS331AP's channel descriptorLee Jones
Due to the MACRO used, the task of reading, understanding and maintaining the LPS331AP's channel descriptor is substantially difficult. This patch is based on the view that it's better to have easy to read, maintainable code than to save a few lines here and there. For that reason we're expanding the array so initialisation is completed in full. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-14iio: pressure-core: st: Describe LPS331AP defines by nameLee Jones
They're currently named *_1_*, for 'Sensor 1', but the code will be much more readable if we use the naming convention *_LPS331AP_* instead. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-14iio: sensors-core: st: Clean-up error handling in st_sensors_read_info_raw()Lee Jones
Saving a few lines of code. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-14iio: sensors-core: st: Allow full-scale to be an optional featureLee Jones
Some chips either don't support it or fail to provide adequate documentation, so sometimes it's impossible to enable the feature even if it is supported. Signed-off-by: Lee Jones <lee.jones@linaro.org> Acked-by: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-14iio: Add tsl4531 ambient light sensor driverPeter Meerwald
driver for the TSL4531 family of 16-bit I2C ambient light sensors; information is here: http://www.ams.com/eng/Products/Light-Sensors/Ambient-Light-Sensor-ALS/TSL45315 the chip offers simple lux output v3 (thanks Lars-Peter Clausen): * add mutex to when updating integration time * fix chip ID checking * code cleanups v2: * rename to tsl4351 * use INT_TIME Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-14iio: adjd_s311: Use INT_TIME channel infoPeter Meerwald
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-14iio: Add INT_TIME (integration time) channel info attributePeter Meerwald
Integration time is in seconds; it controls the measurement time and influences the gain of a sensor. There are two typical ways that scaling is implemented in a device: 1) input amplifier, 2) reference to the ADC is changed. These both result in the accuracy of the ADC varying (by applying its sampling over a more relevant range). Integration time is a way of dealing with noise inherent in the analog sensor itself. In the case of a light sensor, a mixture of photon noise and device specific noise. Photon noise is dealt with by either improving the efficiency of the sensor, (more photons actually captured) which is not easily varied dynamically, or by integrating the measurement over a longer time period. Note that this can also be thought of as an averaging of a number of individual samples and is infact sometimes implemented this way. Altering integration time implies that the duration of a measurement changes, a fact the device's user may be interested in. Hence it makes sense to distinguish between integration time and simple scale. In some devices both types of control are present and whilst they will have similar effects on the amplitude of the reading, their effect on the noise of the measurements will differ considerably. Used by adjd_s311, tsl4531, tcs3472 The following drivers have similar controls (and could be adapted): * tsl2563 (integration time is controlled via CALIBSCALE among other things) * tsl2583 (has integration_time device_attr, but driver doesn't use channels yet) * tsl2x7x (has integration_time attr) Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Cc: Jon Brenner <jon.brenner@ams.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-14iio: dac: ad5686: Remove redundant breakSachin Kamat
'break' after return is redundant. Remove it. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-14iio: gyro: adxrs450: Remove redundant breakSachin Kamat
'break' after return is redundant. Remove it. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-14iio: gyro: adis16260: Remove redundant breakSachin Kamat
'break' after return is redundant. Remove it. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-14iio: gyro: adis16130: Remove redundant breakSachin Kamat
'break' after return is redundant. Remove it. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-13Remove GENERIC_HARDIRQ config optionMartin Schwidefsky
After the last architecture switched to generic hard irqs the config options HAVE_GENERIC_HARDIRQS & GENERIC_HARDIRQS and the related code for !CONFIG_GENERIC_HARDIRQS can be removed. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-09-07iio: adc: Add driver for Microchip MCP3422/3/4 high resolution ADCAngelo Compagnucci
Sysfs access to all channels. Signed-off-by: Angelo Compagnucci <angelo.compagnucci@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-03Merge tag 'staging-3.12-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging Pull staging tree merge from Greg KH: "Here's the bit staging tree pull request for 3.12-rc1. Lots of staging driver updates, and fixes. Lustre is finally enabled in the build, and lots of cleanup started happening in it. There's a new wireless driver in here, and 2 new TTY drivers, which cause the overall lines added/removed to be quite large on the "added" side. The IIO driver updates are also coming through here, as they are tied to the staging iio drivers" * tag 'staging-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (942 commits) staging: dwc2: make dwc2_core_params documentation more complete staging: dwc2: validate the value for phy_utmi_width staging: dwc2: interpret all hwcfg and related register at init time staging: dwc2: properly mask the GRXFSIZ register staging: dwc2: remove redundant register reads staging: dwc2: re-use hptxfsiz variable staging: dwc2: simplify debug output in dwc_hc_init staging: dwc2: add missing shift staging: dwc2: simplify register shift expressions staging: dwc2: only read the snpsid register once staging: dwc2: unshift non-bool register value constants staging: dwc2: fix off-by-one in check for max_packet_count parameter staging: dwc2: remove specific fifo size constants Staging:BCM:DDRInit.c:Renaming __FUNCTION__ staging: bcm: remove Version.h file. staging: rtl8188eu: off by one in rtw_set_802_11_add_wep() staging: r8188eu: copying one byte too much staging: rtl8188eu: || vs && typo staging: r8188eu: off by one bugs staging: crystalhd: Resolve sparse 'different base types' warnings. ...
2013-08-29iio: at91: Use different prescal, startup mask in MR for different IPJosh Wu
For at91 boards, there are different IPs for adc. Different IPs has different STARTUP & PRESCAL mask in ADC_MR. Signed-off-by: Josh Wu <josh.wu@atmel.com> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-29iio: at91: introduce the multiple compatible string for different IPs.Josh Wu
As use the multiple compatible string, we can remove hardware register in dt. CC: devicetree@vger.kernel.org Signed-off-by: Josh Wu <josh.wu@atmel.com> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-28iio: adc: twl6030-gpadc: fix error return code in twl6030_gpadc_read_raw()Wei Yongjun
Fix to return -EINTR in the error handling case instead of 0 (ret is assigned after goto, which has no effect), as done elsewhere in this function. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-28iio: add Bosch BMA180 acceleration sensor driverOleksandr Kravchenko
This patch adds IIO driver for Bosch BMA180 triaxial acceleration sensor. http://dlnmh9ip6v2uc.cloudfront.net/datasheets/ Sensors/Accelerometers/BST-BMA180-DS000-07_2.pdf Signed-off-by: Oleksandr Kravchenko <o.v.kravchenko@globallogic.com> Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-19iio: dac: max517: Use devm_iio_device_allocSachin Kamat
Using devm_iio_device_alloc makes code simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Cc: Roland Stigge <stigge@antcom.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-19iio: dac: ad7303: Use devm_* APIsSachin Kamat
devm_* APIs are device managed and make code simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-19iio: dac: ad5791: Use devm_* APIsSachin Kamat
devm_* APIs are device managed and make code simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-19iio: dac: ad5764: Use devm_* APIsSachin Kamat
devm_* APIs are device managed and make code simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-19iio: dac: ad5755: Use devm_iio_device_allocSachin Kamat
Using devm_iio_device_alloc makes code simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-19iio: dac: ad5686: Use devm_* APIsSachin Kamat
devm_* APIs are device managed and make code simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-19iio: dac: ad5624r_spi: Use devm_* APIsSachin Kamat
devm_* APIs are device managed and make code simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-19iio: dac: ad5504: Use devm_* APIsSachin Kamat
devm_* APIs are device managed and make code simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-19iio: dac: ad5449: Use devm_* APIsSachin Kamat
devm_* APIs are device managed and make code simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-19iio: dac: ad5446: Use devm_* APIsSachin Kamat
devm_* APIs are device managed and make code simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-19iio: dac: ad5421: Use devm_* APIsSachin Kamat
devm_* APIs are device managed and make code simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-19iio: dac: ad5380: Use devm_* APIsSachin Kamat
devm_* APIs are device managed and make code simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-19iio: dac: ad5360: Use devm_* APIsSachin Kamat
devm_* APIs are device managed and make code simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-19iio: dac: ad5064: Use devm_* APIsSachin Kamat
devm_* APIs are device managed and make code simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-19iio: adc: twl6030-gpadc: Use devm_* API familyOleksandr Kozaruk
Using devm_iio_device_alloc and devm_request_threaded_irq makes code simpler. Signed-off-by: Oleksandr Kozaruk <oleksandr.kozaruk@ti.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-19iio: adjd_s311: Cleanup unused #definesPeter Meerwald
using word reads, no need for HI/LO register #defines Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-19iio: Remove unnecessary _write_raw_get_fmt() in several hid-sensor driversPeter Meerwald
IIO_VAL_INT_PLUS_MICRO is the default, no need to return it explicitly Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Acked-by: srinivas pandruvada <srinivas.pandruvada@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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