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2017-07-25iio: adc: New driver for Cirrus Logic EP93xx ADCAlexander Sverdlin4-0/+296
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>
2017-07-23iio: 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>
2017-07-22Staging: iio: adc: ad7280a.c: Fixed Macro argument reuseJaya Durga1-8/+13
CHECK: Macro argument reuse 'addr' - possible side-effects? convert AD7280A_DEVADDR to ad7280a_devaddr static function to fix checkpath check v3: small style changes Signed-off-by: Jaya Durga <rjdurga@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-22dt-bindings: iio: humidity: hts221: support active-low interruptsLorenzo Bianconi1-1/+2
Update hts221 device binding with active-low interrupts support (IRQ_TYPE_LEVEL_LOW and IRQ_TYPE_EDGE_FALLING). Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> 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: Documentation: Add missing documentation for power attributeStefan Brüns1-0/+9
Commit c43a102e67db ("iio: ina2xx: add support for TI INA2xx Power Monitors") introduced the in_powerY_raw attribute, but omitted the corresponding documentation. The description is correct for the INA2xx and the MAX9611 IIO drivers. Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de> 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>
2017-07-15iio: 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>
2017-07-15dt-bindings: iio: stm32-dac: add support for STM32F4Fabrice Gasnier1-1/+3
Introduce new compatible to support STM32F4 DAC (Digital-To-Analog converter) variant. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-11iio: 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: 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>
2017-07-09iio: adc: rockchip_saradc: add NULL check on of_match_device() return valueGustavo A. R. Silva1-0/+5
Check return value from call to of_match_device() in order to prevent a NULL pointer dereference. In case of NULL print error message and return -ENODEV Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-09iio: adc: meson-saradc: add NULL check on of_match_device() return valueGustavo A. R. Silva1-0/+5
Check return value from call to of_match_device() in order to prevent a NULL pointer dereference. In case of NULL print error message and return -ENODEV Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-09staging: iio: tsl2x7x: check return value from tsl2x7x_invoke_change()Brian Masney1-18/+37
The return value from tsl2x7x_invoke_change() was not checked in most places in the driver. This patch adds the proper error checks. The return values inside tsl2x7x_invoke_change() are now checked by this patch as well. Previously, if there was an error turning the chip back on, then the driver would attempt to turn the chip off and incorrectly return success. The code to power off the chip is removed by this patch since we should fail fast. Signed-off-by: Brian Masney <masneyb@onstation.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-09staging: iio: tsl2x7x: use usleep_range() instead of mdelay()Brian Masney1-2/+3
This driver in some cases can busy wait for upwards of 15ms. Since the kernel at this point is not running in atomic context, and is running in process context, we can safely use usleep_range() instead. This patch changes the two occurrences of mdelay() to usleep_range(). Signed-off-by: Brian Masney <masneyb@onstation.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-09staging: iio: tsl2x7x: refactor {read,write}_event_value to allow handling ↵Brian Masney1-67/+90
multiple iio_event_infos tsl2x7x_read_thresh() and tsl2x7x_write_thresh() currently assumes that IIO_EV_INFO_VALUE is the only iio_event_info that will be passed in. This patch refactors these two functions so that additional iio_event_infos can be passed in. The functions are renamed from tsl2x7x_{read,write}_thresh() to tsl2x7x_{read,write}_event_value(). This patch also adds the missing return value check to tsl2x7x_invoke_change() since this was previously missing. This patch is in preparation for moving the in_intensity0_thresh_period and in_proximity0_thresh_period sysfs attributes to be created by iio_event_spec. Signed-off-by: Brian Masney <masneyb@onstation.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-09staging: iio: tsl2x7x: cleaned up i2c calls in tsl2x7x_als_calibrate()Brian Masney1-22/+12
The calibration function calls i2c_smbus_write_byte() and i2c_smbus_read_byte(). These two function calls are replaced with a single call to i2c_smbus_read_byte_data() by this patch. This patch also removes an unnecessary call that reads the CNTRL register a second time. One of the error paths returned -1 if the ADC was not enabled and this patch changes that return value to -EINVAL. Signed-off-by: Brian Masney <masneyb@onstation.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-09staging: iio: tsl2x7x: remove tsl2x7x_i2c_read()Brian Masney1-49/+22
tsl2x7x_i2c_read() would call i2c_smbus_write_byte() and i2c_smbus_read_byte(). These two i2c functions can be replaced with a single call to i2c_smbus_read_byte_data(). This patch removes the tsl2x7x_i2c_read() function and replaces all occurrences with a call to i2c_smbus_read_byte_data(). Signed-off-by: Brian Masney <masneyb@onstation.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-09staging: iio: tsl2x7x: remove redundant power_state sysfs attributeBrian Masney1-34/+0
The TSL2X7X driver has a custom power_state sysfs attribute. Remove this attribute since the runtime power management code provides a sysfs attribute to control the power state of the device. Signed-off-by: Brian Masney <masneyb@onstation.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-09staging: iio: tsl2x7x: add of_match table for device tree supportBrian Masney1-0/+16
Add device tree support for the tsl2x7x IIO driver with no custom properties. The device tree documentation is in a separate commit so that the changes to trivial-devices.txt can go in via the device tree subsystem. Signed-off-by: Brian Masney <masneyb@onstation.org> CC: Rob Herring <robh+dt@kernel.org> CC: Mark Rutland <mark.rutland@arm.com> CC: devicetree@vger.kernel.org Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-09iio: adc: Add support for DLN2 ADCJack Andersen3-0/+732
This patch adds support for Diolan DLN2 ADC via IIO's ADC interface. ADC is the fourth and final component of the DLN2 for the kernel. Signed-off-by: Jack Andersen <jackoalan@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-06iio: pressure: zpa2326: Add newlines to logging macrosJoe Perches1-6/+6
Add newlines to the macro definitions and use a more common style. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-04iio: Add LTC2471/LTC2473 driverMike Looijmans3-0/+171
The LTC2741 and LTC2473 are single voltage ADC chips. The LTC2473 is similar to the LTC2471 but outputs a signed differential value. Datasheet: http://cds.linear.com/docs/en/datasheet/24713fb.pdf Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-04iio: light: rpr0521 triggered bufferMikko Koivunen1-7/+329
Set up and use triggered buffer if there is irq defined for device in device tree. Trigger producer triggers from rpr0521 drdy interrupt line. Trigger consumer reads rpr0521 data to scan buffer. Depends on previous commits of _scale and _offset. Signed-off-by: Mikko Koivunen <mikko.koivunen@fi.rohmeurope.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-02iio: adis16400: Change unsigned to unsigned intReno Farnesi1-2/+2
This patch fixes the following checkpatch warnings: Prefer 'unsigned int' to bare use of 'unsigned Signed-off-by: Reno Farnesi <nfarnesi4@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-02iio: pressure: st_pressure_spi: add OF capability to st_pressure_spiLorenzo Bianconi1-0/+33
Add device tree support for LPS22HB, LPS25H, LPS331AP, LPS001WP pressure sensors Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-02iio: gyro: st_gyro_spi: add OF capability to st_gyro_spiLorenzo Bianconi1-0/+53
Add device tree support for L3G4200D, LSM330D, LSM330DL, LSM330DLC, L3GD20, L3GD20H, L3G4IS, LSM330, LSM9DS0 gyroscope sensors Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-02iio: magnetometer: st_magn_spi: add OF capability to st_magn_spiLorenzo Bianconi1-0/+25
Add device tree support for LIS3MDL and LSM303AGR magnetometer sensors Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-02iio: accel: st_accel_spi: add OF capability to st_accel_spiLorenzo Bianconi1-8/+61
Add device tree support for LIS3DH, LSM330D, LSM330DL, LSM330DLC, LIS331DLH, LSM330, LSM303AGR, LIS2DH12, LIS3L02DQ, LNG2DM accel sensors. Fix LIS302DL support defining of_device_id data field in st_accel_of_match table Fixes: 762227721fe6 (iio: accel: st_accel: handle deprecated bindings) Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-02iio: magnetometer: Only declare ACPI table when ACPI is enableMatthias Kaehlcke1-0/+2
Don't inflate the kernel size with data that isn't used. The conditional declaration also fixes the following warning when building with clang: drivers/iio/magnetometer/ak8975.c:704:36: error: variable 'ak_acpi_match' is not needed and will not be emitted [-Werror,-Wunneeded-internal-declaration] Signed-off-by: Matthias Kaehlcke <mka@chromium.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-02iio: sca3000: Remove trailing whitespaceReno Farnesi1-3/+3
Removes trailing whitespace to fix checkpatch errors Signed-off-by: Reno Farnesi <nfarnesi4@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-02iio:adc:ltc2497: Add support for board file based iio consumer mapping.Gaurav Gupta1-19/+35
Add missing hooks in the LTC2497 IIO driver to allow hwmon mapping. Signed-off-by: Gaurav Gupta <gauragup@cisco.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-02iio: adc: stm32: make array stm32h7_adc_ckmodes_spec staticColin Ian King1-1/+1
The array stm32h7_adc_ckmodes_spec does not need to be in global scope, so make it static. Cleans up sparse warning: "symbol 'stm32h7_adc_ckmodes_spec' was not declared. Should it be static?" Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-02iio: adc: mcp3422: Checking for error on probeAngelo Compagnucci1-1/+3
Some part of the configuration are not touched after the probe and if something goes wrong on writing the initial one, the chip will misbehave. Adding an error checking ensures that the inital configuration will be written correctly. Moreover ensures that a sensible configuration will be saved in driver data and used subsequently as intended. Signed-off-by: Angelo Compagnucci <angelo.compagnucci@gmail.com> Reported-by: Maarten Brock <m.brock@vanmierlo.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-02iio: adc: mcp3422: Changing initial channelAngelo Compagnucci1-1/+1
Initial channel should be the first available channel on all configurations, so changing to channel 0 available on all supported chips. Signed-off-by: Angelo Compagnucci <angelo.compagnucci@gmail.com> Reported-by: Maarten Brock <m.brock@vanmierlo.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-02iio: gyro: mpu3050: Allow open drain with anythingLinus Walleij1-10/+0
Open drain should work fine with rising or high level IRQs, this code was due to some misunderstanding on my part. Reported-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-01iio: light: tcs3472: add link to datasheetAkinobu Mita1-0/+2
Add a link to the TCS3472 datasheet in the AMS's website. Cc: Peter Meerwald <pmeerw@pmeerw.net> Cc: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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