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2017-08-18iio: chemical: ccs811: Add triggered buffer supportNarcisa Ana Maria Vasile2-5/+73
A software trigger such as hrtimer can be used to capture the data that will be stored in the buffer. Cc: Daniel Baluta <daniel.baluta@gmail.com> Cc: Alison Schofield <amsfield22@gmail.com> Signed-off-by: Narcisa Ana Maria Vasile <narcisaanamaria12@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-08-18iio: srf08: add support for srf02 in i2c modeAndreas Klinger2-22/+67
srf02 added with support for i2c interface Attributes for setting max range or sensitivity are omitted for the case of srf02 type sensor, because they are not supported by the hardware. Signed-off-by: Andreas Klinger <ak@it-klinger.de> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-08-18iio: srf08: add sensor type srf10Andreas Klinger2-17/+77
Ultrasonic sensor srf10 is quite similar to srf08 and now also supported by the driver as device tree compatible string. It was necessary to prepare the source for supplementary sensors. This is done by enum srf08_sensor_type. The most significiant difference between srf08 and srf10 is another range and values of register gain (in the driver it's call sensitivity). Therefore the array of it is extended and dependent of the sensor type. Signed-off-by: Andreas Klinger <ak@it-klinger.de> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-08-18iio: srf08: add triggered buffer supportAndreas Klinger1-3/+57
Add support for triggered buffers. Data format is quite simple: distance 16 Bit alignment 48 Bit timestamp 64 Bit Signed-off-by: Andreas Klinger <ak@it-klinger.de> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-08-18iio: srf08: add device tree tableAndreas Klinger1-0/+8
Added MODULE_DEVICE_TABLE for device tree bindings. It used to work without it by using the i2c_device_id table, but adding the table makes everything clear and documented. Signed-off-by: Andreas Klinger <ak@it-klinger.de> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-08-17iio: magnetometer: add support to LIS2MDLLorenzo Bianconi4-0/+12
add support to STMicroelectronics LIS2MDL magnetometer in st_magn framework http://www.st.com/resource/en/datasheet/lis2mdl.pdf Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-08-17iio: adc: select triggered buffer for sama5d2 adcArnd Bergmann1-0/+1
Without the triggered buffer code, we get a link error: drivers/iio/adc/at91-sama5d2_adc.o: In function `at91_adc_probe': at91-sama5d2_adc.c:(.text+0x938): undefined reference to `devm_iio_triggered_buffer_setup' This adds a Kconfig 'select' statement like other ADC drivers have it already. Fixes: 5e1a1da0f8c9 ("iio: adc: at91-sama5d2_adc: add hw trigger and buffer support") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-08-14Merge 4.13-rc5 into staging-nextGreg Kroah-Hartman9-14/+133
We need it here for iio fixes. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-08-12iio: accel: st_accel: fix data-ready line configurationLorenzo Bianconi1-2/+2
Remove int2 configuration parameter for LIS3DH, LSM303DLHC, LSM330D, LSM330DL, LSM330DLC, LSM303AGR, LIS2DH12 and LNG2DM since these devices export just int1 as data-ready line Fixes: 23cde4d65cc7 (iio: Added platform data to select the DRDY pin) Fixes: dcdb0a78cab3 (iio: accel: st_accel: add support to lng2dm) Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-08-12iio: pressure: st_pressure: fix drdy configuration for LPS22HB and LPS25HLorenzo Bianconi1-2/+2
Remove int2 configuration parameter for LPS22HB and LPS25H since these devices export just int1 as data-ready line Fixes: 931878405b86 (iio:pressure: Add support for LPS25H pressure sensor) Fixes: e039e2f5b4da (iio:st_pressure:initial lps22hb sensor support) Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-08-12iio: adc: xadc: Fix coding style violationsSai Krishna Potthuri2-25/+23
This patch fix following checkpatch warnings in xadc driver 1. prefer 'unsigned int' to bare use of 'unsigned'. 2. else is not generally useful after a break or return. 3. fill all function definition arguments with identifier name Signed-off-by: Sai Krishna Potthuri <lakshmis@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-08-12iio: trigger: stm32-timer: add output compare triggersFabrice Gasnier1-11/+20
Add output compare trigger sources available on some instances. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-08-12iio: trigger: stm32-timer: add support for STM32H7Fabrice Gasnier1-4/+51
Add support for STM32H7 timer triggers: - Add new valids_table - Introduce compatible, with configuration data - Extend up to 15 timers, available on STM32H7 Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-08-09HID: hid-sensor-hub: Force logical minimum to 1 for power and report stateSrinivas Pandruvada1-0/+3
In the reference HID sensor hub firmware all Named array enums were 0-based. There is no description of the default base of enums in HID sensor hub specification as logical minimum should have set this base value. Every sensor hub implemented enum as 1-based, without explicitly setting logical minimum to 1, because of the implementation by one of the major OS vendor. In Linux we used logical minimum to decide the enum base. Some sensor hub FWs already changed logical minimum from 0 to 1. We hoped that every other vendor will follow. But that didn't happen and we had to fix the report header for every sensor hub to change logical minimum to 1 by using .report_fixup() callback. So for every new sensor hub we had to modify source code by adding this quirk based on the vendor and device id. This is becoming a maintenance burden. This patch hardcodes the logical minimum of power and report state attributes to 1. In this way we can remove the existing quirks and also we don't have to add more quirks. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2017-08-09iio: adc: ti-ads7950: Add OF device ID tableAndy Shevchenko1-0/+18
The driver doesn't have a struct of_device_id table but supported devices are registered via Device Trees. This is working on the assumption that a SPI device registered via OF will always match a legacy SPI device ID and that the MODALIAS reported will always be of the form spi:<device>. There is an ACPI method to enumerate such devices via specific ACPI ID and use of compatible strings. It will not work for the drivers which have no OF match ID table present. Besides this could change in the future so the correct approach is to have an OF device ID table if the devices are registered via OF. Tested-by: David Lechner <david@lechnology.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-08-09iio: adc: stm32: add optional st,min-sample-time-nsecsFabrice Gasnier1-4/+136
STM32 ADC allows each channel to be sampled with a different sampling time, by setting SMPR registers. Basically, value depends on local electrical properties. Selecting correct value for sampling time highly depends on analog source impedance. There is a manual that may help in this process: 'How to get the best ADC accuracy in STM32...' This patch allows to configure minimum sampling time via device tree, either for: - all channels at once: st,min-sample-time-nsecs = <10000>; - independently for each channel (must match "st,adc-channels" list): st,adc-channels = <0 1>; st,min-sample-time-nsecs = <5000 10000>; Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-30iio: adc: stm32: fix common clock rateFabrice Gasnier1-5/+5
ADC clock input is provided to internal prescaler (that decreases its frequency). It's then used as reference clock for conversions. - Fix common clock rate used then by stm32-adc sub-devices. Take common prescaler into account. Currently, rate is used to set "boost" mode. It may unnecessarily be set. This impacts power consumption. - Fix ADC max clock rate on STM32H7 (fADC from datasheet). Currently, prescaler may be set too low. This can result in ADC reference clock used for conversion to exceed max allowed clock frequency. Fixes: 95e339b6e85d ("iio: adc: stm32: add support for STM32H7") Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-30iio: adc: ina219: Avoid underflow for sleeping timeStefan Brüns1-1/+1
Proper support for the INA219 lowered the minimum sampling period from 2*140us to 2*84us. Subtracting 200us later leads to an underflow and an almost infinite udelay later. Using a signed int for the sampling period provides sufficient range (at most 2*8640*1024us), but catches the underflow when comparing with buffer_us. Fixes: 18edac2e22f4 ("iio: adc: Fix integration time/averaging for INA219/220") Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-30iio: trigger: stm32-timer: add enable attributeFabrice Gasnier1-14/+41
In order to use encoder mode, timers needs to be enabled (e.g. CEN bit) along with peripheral clock. Add IIO_CHAN_INFO_ENABLE attribute to handle this. Also, in triggered mode, CEN bit is set automatically in hardware. Then clock must be enabled before starting triggered mode. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Acked-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-30iio: trigger: stm32-timer: fix get/set down count directionFabrice Gasnier1-4/+11
Fixes: 4adec7da0536 ("iio: stm32 trigger: Add quadrature encoder device") This fixes two issues: - stm32_set_count_direction: to set down direction - stm32_get_count_direction: to get down direction IIO core provides/expects value to be an index of iio_enum items array. This needs to be turned by these routines into TIM_CR1_DIR (e.g. BIT(4)) value. Also, report error when attempting to write direction, when in encoder mode: in this case, direction is read only (given by encoder inputs). Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Acked-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-30iio: trigger: stm32-timer: fix write_raw return valueFabrice Gasnier1-2/+1
Fixes: 4adec7da0536 ("iio: stm32 trigger: Add quadrature encoder device") IIO core expects zero as return value for write_raw() callback in case of success. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Acked-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-30iio: trigger: stm32-timer: fix quadrature mode get routineFabrice Gasnier1-2/+5
Fixes: 4adec7da0536 ("iio: stm32 trigger: Add quadrature encoder device") SMS bitfiled is mode + 1. After reset, upon boot, SMS = 0. When reading from sysfs, stm32_get_quadrature_mode() returns -1 (e.g. -EPERM) which is wrong error code here. So, check SMS bitfiled matches valid encoder mode, or return -EINVAL. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Acked-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-30iio: bmp280: properly initialize device for humidity readingAndreas Klinger2-3/+29
If the device is not initialized at least once it happens that the humidity reading is skipped, which means the special value 0x8000 is delivered. For omitting this case the oversampling of the humidity must be set before the oversampling of the temperature und pressure is set as written in the datasheet of the BME280. Furthermore proper error detection is added in case a skipped value is read from the device. This is done also for pressure and temperature reading. Especially it don't make sense to compensate this value and treat it as regular value. Signed-off-by: Andreas Klinger <ak@it-klinger.de> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-27Merge tag 'iio-for-4.14a' of ↵Greg Kroah-Hartman57-266/+2758
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next Jonathan writes: First round of IIO new device support, features and cleanups for the 4.14 cycle. 4 completely new drivers in this set and plenty of other stuff. One ABI change due to a silly mistake a long time back. Hopefully no one will notice. It effects the numerical order of consumer device channels which was the reverse of the obvious. It's going the slow way to allow us some margin to spot if we have broken userspace or not (seems unlikely) New Device Support * ccs811 - new driver for the Volatile Organic Compounds (VOC) sensor. * dln2 adc - new driver for the ADC on this flexible usb board. * EP93xx - new driver for this Cirrus logic SoC ADC. * ltc2471 - new ADC driver support the ltc2471 and ltc2473 * st_accel - add trivial table entries to support H3LIS331DL, LIS331DL, LIS3LV02DL. * st_gyro - add L3GD20H support (again) having fixed the various things that were broken in the first try. Includes devicetree binding. * stm32 dac - add support for the DACs in the STM32F4 series Features * Documentation - add missing power attribute documentation to the ABI docs. * at91-sama5d2 - add hardware trigger and buffered capture support with bindings. - suspend and resume functionality. * bmc150 - support for the BOSC0200 ACPI device id seen on some tablets. * hdc100x - devicetree bindings - document supported devices - match table and device ids. * hts221 - support active low interrupts (with bindings) - open drain mode with bindings. * htu21 - OF match table and bindings. * lsm6dsx - open drain mode with bindings * ltc2497 - add support for board file based consumer mapping. * ms5367 - OF match table and bindings. * mt7622 - binding document and OF match table. - suspend and resume support. * rpr0521 - triggered buffer support. * tsys01 - OF match table and bindings. Cleanups and minor fixes * core - fix ordering of IIO channels to entry numbers when using iio_map_array_register rather than reversing them. - use the new %pOF format specifier rather than full name for the device tree nodes. * ad7280a - fix potential issue with macro argument reuse. * ad7766 - drop a pointless NULL value check as it's done in the gpiod code. * adis16400 - unsigned -> unsigned int. * at91 adc - make some init data static to reduce code size. * at91-sama5d2 ADC - make some init data static to reduce code size. * da311 - make some init data static to reduce code size. * hid-sensor-rotation - drop an unnecessary static. * hts221 - refactor the write_with_mask code. - move the BDU configuration to probe time as there is no reason for it to change. - avoid overwriting reserved data during power-down. This is a fix, but the infrastructure need was too invasive to send it to mainline except in a merge window. It's not a regression as it was always wrong. - avoid reconfigure the sampling frequency multiple times by just doing it in the write_raw function directly. - refactor the power_on/off calls into a set_enable. - move the dry-enable logic into trig_set_state as that is the only place it was used. * ina219 - fix polling of ina226 conversion ready flag. * imx7d - add vendor name in kconfig for consistency with similar parts. * mcp3422 - Change initial channel to 0 as it feels more logical. - Check for some errors in probe. * meson-saradc - add a check of of_match_device return value. * mpu3050 - allow open drain for any interrupt type. * rockchip adc - add check on of_match_device return value. * sca3000 - drop a trailing whitespace. * stm32 adc - make array stm32h7_adc_ckmodes_spec static. * stm32 dac - fix an error message. * stm32 timers - fix clock name in docs to match reality after changes. * st_accel - explicit OF table (spi). - add missing entries to OF table (i2c). - rename of_device_id table to drop the part name. - adding missing lis3l02dq entry to bindings. - rename H3LIS331DL_DRIVER_NAME to line up with similar entries in driver. * st_gyro - explicit OF table (spi). * st_magn - explicit OF table (spi). - enable multiread for lis3mdl. * st_pressure - explicit OF table (spi). * st_sensors common. - move st_sensors_of_i2c_probe and rename to make it available for spi drivers. * tsc3472 - don't write an extra byte when writing the ATIME register. - add a link to the datasheet. * tsl2x7x - continued staging cleanups - add of_match_table. - drop redundant power_state sysfs attribute. - drop wrapper tsl2x7x_i2c_read. - clean up i2c calls made in tsl2x7x_als_calibrate. - refactor the read and write _event_value callbacks to handle additional elements. - use usleep_range instead of mdelay. - check return value from tsl2x7x_invoke_change. * zpa2326 - add some newline to the end of logging macros.
2017-07-25iio: humidity: hts221: move drdy enable logic in hts221_trig_set_state()Lorenzo Bianconi3-16/+7
Move data-ready configuration in hts221_buffer.c since it is only related to trigger logic Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-25iio: humidity: hts221: support open drain modeLorenzo Bianconi1-1/+21
Add open drain support in order to share requested IRQ line between hts221 device and other peripherals Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-25iio: adc: New driver for Cirrus Logic EP93xx ADCAlexander Sverdlin3-0/+267
New driver adding support for ADC found on Cirrus Logic EP93xx series of SoCs. Board specific code must take care to create plaform device with all necessary resources. Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-23Merge tag 'iio-fixes-for-4.13a' of ↵Greg Kroah-Hartman9-14/+133
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus Jonathan writes: First set of IIO fixes for the 4.13 cycle. * ad2s1210 - Fix negative angular velocity reads (identified by a gcc 7 warning) * aspeed-adc - Wait for initialization sequence to finish before enabling channels. Without it no channels work. * axp288 - Revert a patch that dropped some bogus register mods. No one is entirely sure why but it breaks charging on some devices. - Fix GPADC pin read returning 0. Turns out a small sleep is needed. * bmc150 - Make sure device is restored to normal state after suspend / resume cycle. Otherwise, simple sysfs reads are broken. * tsl2563 - fix wrong event code. * st-accel - add spi 3-wire support. Needed to fix the lsm303agr accelerometer which only had 3 wires in all cases. Side effect is to enable optional 3-wire support for other devices. * st-pressure - disable multiread by default for LPS22HB (only effects SPI) * sun4i-gpadc-iio - fix unbalanced irq enable / disable * vf610 - Fix VALT slection for REFSEL bits - ensures we are using the right reference pins.
2017-07-23iio: aspeed-adc: wait for initial sequence.Mykola Kostenok1-0/+26
This patch enables adc engine at initialization time and waits for the initial sequence completion before enabling adc channels. Without this code adc channels are not functional and shows zeros for all connected channels. Tested on mellanox msn platform. v1 -> v2: Pointed by Rick Altherr: - Wait init sequence code enabled by bool from OF match table. Signed-off-by: Mykola Kostenok <c_mykolak@mellanox.com> Reviewed-by: Rick Altherr <raltherr@google.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-22iio: Convert to using %pOF instead of full_nameRob Herring4-16/+16
Now that we have a custom printf format specifier, convert users of full_name to use %pOF instead. This is preparation to remove storing of the full path string for each node. Signed-off-by: Rob Herring <robh@kernel.org> 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> Cc: Carlo Caione <carlo@caione.org> Cc: Kevin Hilman <khilman@baylibre.com> Cc: linux-iio@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-amlogic@lists.infradead.org Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-22iio: humidity: hts221: support active-low interruptsLorenzo Bianconi3-2/+13
Add support for active low interrupts (IRQF_TRIGGER_LOW and IRQF_TRIGGER_FALLING). Configure the device as active high or low according to the requested irq line. Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-22iio: humidity: hts221: squash hts221_power_on/off in hts221_set_enableLorenzo Bianconi3-23/+8
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-22iio: humidity: hts221: avoid useless ODR reconfigurationLorenzo Bianconi1-9/+8
Configure sensor ODR just in hts221_write_raw() in order to avoid to set device sample rate multiple times. Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-22iio: humidity: hts221: do not overwrite reserved data during power-downLorenzo Bianconi1-6/+4
GENMASK(6, 3) in CTRL_REG1 and GENMASK(6, 2) in CTRL_REG2 are marked reserved. Do not changed the original value (not declared in the datasheet) during power-down/suspend routines. Fixes: e4a70e3e7d84 (iio: humidity: add support to hts221 rh/temp device) Fixes: b7079eeac5da (iio: humidity: hts221: add power management support) Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-22iio: humidity: hts221: move BDU configuration in probe routineLorenzo Bianconi1-6/+6
Enable Block Data Update in hts221_probe() in order to avoid to reconfigure it every time the sensor is enabled Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-22iio: humidity: hts221: refactor write_with_mask codeLorenzo Bianconi2-58/+42
Move bit-shift in hts221_write_with_mask() instead of coding the shift depth in the configured value. That change will be necessary to fix an issue in device power-down procedure. Simplify hts221_avg_list table management Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-22iio: chemical: ccs811: Add support for AMS CCS811 VOC sensorNarcisa Ana Maria Vasile3-0/+347
Add support for CCS811 VOC sensor. This patch adds support for reading current and voltage across the sensor and TVOC and equivalent CO2 values. Scale and offset values have been computed according to datasheet: - For current: raw value is in microamps => 0.001 scale to convert to milliamps - For voltage: 1.65V = 1023, therefore 1650mV = 1023 => 1650.0/1023 = 1.612903 scale to convert to millivolts - For eCO2: raw value range is from 400ppm to 8192ppm. => (val - 400) * (100 - 0) / (8192 - 400) + 0 = (val - 400) * 0.01283367 => offset: -400, scale = 0.012834 to get a percentage value -For TVOC: raw value range is from 0ppb to 1187ppb. => (val - 0) * 100 / (1187 - 0) + 0 = val * 0.0842459 => scale = 0.084246 for getting a percentage value Cc: Daniel Baluta <daniel.baluta@gmail.com> Cc: Alison Schofield <amsfield22@gmail.com> Signed-off-by: Narcisa Ana Maria Vasile <narcisaanamaria12@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-17iio: adc: ad7766: Remove unneeded gpiod NULL checkFabio Estevam1-4/+2
The gpiod API checks for NULL descriptors, so there is no need to duplicate the check in the driver. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-17iio: orientation: hid-sensor-rotation: Drop unnecessary staticJulia Lawall1-1/+1
Drop static on a local variable, when the variable is initialized before any possible use. Thus, the static has no benefit. The semantic patch that fixes this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @bad exists@ position p; identifier x; type T; @@ static T x@p; ... x = <+...x...+> @@ identifier x; expression e; type T; position p != bad.p; @@ -static T x@p; ... when != x when strict ?x = e; // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-17iio: accel: bmc150: Always restore device to normal mode after suspend-resumeHans de Goede1-8/+1
After probe we would put the device in normal mode, after a runtime suspend-resume we would put it back in normal mode. But for a regular suspend-resume we would only put it back in normal mode if triggers or events have been requested. This is not consistent and breaks reading raw values after a suspend-resume. This commit changes the regular resume path to also unconditionally put the device back in normal mode, fixing reading of raw values not working after a regular suspend-resume cycle. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-15iio: core: Fix mapping of iio channels to entry numbersGaurav Gupta1-1/+1
When adding maps to the list, they were added using list_add, which adds them in LIFO order. When parsing using iio_channel_get_all(), these elements are hence returned in reverse order. As a result, the iio_hwmon mapping maps the first entry to the last channel and so on. Signed-off-by: Gaurav Gupta <gauragup@cisco.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-15iio: dac: stm32: add support for stm32f4Fabrice Gasnier1-7/+31
This adds support for STM32F4 Digital-To-Analog converter. Add compatible configuration data to handle hfsel (not present in stm32f4). Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-15iio: dac: stm32: fix error messageFabrice Gasnier1-1/+1
Fix error message, there's no 'st,dac-channel' property, but 'reg' (see https://lkml.org/lkml/2017/4/3/567). Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-10iio: adc: at91: make array startup_lookup staticColin Ian King1-1/+1
Don't populate array startup_lookup on the stack but instead make it static. Makes the object code smaller. Before: text data bss dec hex filename 21754 5440 128 27322 6aba drivers/iio/adc/at91_adc.o After: text data bss dec hex filename 21613 5496 128 27237 6a65 drivers/iio/adc/at91_adc.o Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-09iio: adc: axp288: Fix the GPADC pin reading often wrongly returning 0Hans de Goede1-1/+11
I noticed in its DSDT that one of my tablets actually is using the GPADC pin for temperature monitoring. The whole axp288_adc_set_ts() function is a bit weird, in the past it was removed because it seems to make no sense, then this was reverted because of regressions. So I decided to test the special GPADC pin handling on this tablet. Conclusion: not only is axp288_adc_set_ts() necessary, we need to sleep a bit after making the AXP288_ADC_TS_PIN_CTRL changes before sampling the GPADC, otherwise it will often (about 80% of the time) read 0 instead of its actual value. It seems that there is only 1 bias current source and to be able to use it for the GPIO0 pin in GPADC mode it must be temporarily turned off for the TS pin, but the datasheet does not mention this. This commit adds a sleep after disabling the TS pin bias current, fixing the GPADC more often then not wrongly returning 0. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-09iio: accel: st_accel: rename H3LIS331DL_DRIVER_NAME in H3LIS331DL_ACCEL_DEV_NAMELorenzo Bianconi4-6/+6
In order to use the standard name convention rename H3LIS331DL_DRIVER_NAME macro in H3LIS331DL_ACCEL_DEV_NAME Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-09iio: accel: st_accel_spi: add support to H3LIS331DL, LIS331DL, LIS3LV02DLLorenzo Bianconi1-0/+15
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-09iio: accel: st_accel_i2c: fix i2c_device_id tableLorenzo Bianconi2-0/+6
Add H3LIS331DL, LIS331DL and LIS3LV02DL entries in st_accel_id_table Fixes: 1e52fefc9b0c (iio: accel: Add support for the h3lis331dl accel) Fixes: bbf5f037fad4 (iio: st_accel: support the LIS331DL sensor) Fixes: 3acddf74f807 (iio: st-sensors: add support for lis3lv02d accel) Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-09iio:adc:at91-sama5d2: make array startup_lookup static to reduce code sizeColin Ian King1-1/+1
Making the const array startup_lookup static rather having it on the stack saves 69 bytes. Add in missing int specifier to clean up a checkpatch warning. Before: text data bss dec hex filename 10297 2800 128 13225 33a9 drivers/iio/adc/at91-sama5d2_adc.o After: text data bss dec hex filename 10140 2888 128 13156 3364 drivers/iio/adc/at91-sama5d2_adc.o Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-09iio: accel: make array init_data static to reduce code sizeColin Ian King1-1/+1
Making the const array init_data static rather having it on the stack saves us a couple hundreds of bytes: Before: text data bss dec hex filename 3175 848 0 4023 fb7 drivers/iio/accel/da311.o After: text data bss dec hex filename 2860 936 0 3796 ed4 drivers/iio/accel/da311.o Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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