| Age | Commit message (Collapse) | Author | Files | Lines |
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Implement a measurement sequence that does not involve a one byte read of
the status byte before reading the conversion.
The sensor's conversions should be read either once the EoC interrupt
has triggered or 5ms after the 0xaa command. See Options 1 and 2
respectively in Tables 16 (page 15) and 18 (page 18) of the datasheet.
Note that Honeywell's example code also covered in the datasheet follows
Option 2 for both i2c and SPI.
The datasheet does not specify any of the retry parameters that are
currently implemented in the driver. A simple 5+ms sleep as specified in
Option 2 is enough for a valid measurement sequence.
The change also gets rid of the code duplication tied to the verification
of the status byte.
This change only affects users that do not define the EoC interrupt in
the device tree.
Datasheet: https://prod-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/products/sensors/pressure-sensors/board-mount-pressure-sensors/micropressure-mpr-series/documents/sps-siot-mpr-series-datasheet-32332628-ciid-172626.pdf?download=false
Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Make sure a valid conversion comes with a status byte that only has
the MPR_ST_POWER bit set.
Return -EBUSY if also MPR_ST_BUSY is set or -EIO otherwise.
Reviewed-by: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Move memset() from the bus specific code into core.
Zeroing out the buffer is performed because the sensor has noticeable
latch-up sensitivity and in some cases it clamps the MISO signal to GND
in sync with SCLK [1]. A raw conversion of zero is out of bounds since
valid values have to be between output_min and output_max (and the
smallest output_min is 2.5% of 2^24 = 419430).
The user is expected to discard out of bounds pressure values.
Given the fact that we can't follow the behaviour of all SPI controllers
when faced to this clamping of an output signal, a raw conversion of zero
is used as an early warning in case the low level SPI API reacts
unexpectedly.
Link: https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1588325/am3358-spi-tx-data-corruption [1]
Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Use a tx_buf that is part of the priv struct for transferring data to
the sensor instead of relying on a devm_kzalloc()-ed array.
Remove the .init operation in the process.
Reviewed-by: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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For the reason of better naming consistency rename priv->buffer into
priv->rx_buf since tx_buf will get introduced in the next patch.
Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Remove the iio_chan_spec and iio_dev structs which are already defined in
the included iio.h header.
Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Remove unused headers and add required headers as needed.
Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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A sign change is needed for proper calculation of the pressure.
This is a minor fix since it only affects users that might have custom
silicon from Honeywell that has honeywell,pmin-pascal != 0.
Also due to the fact that raw pressure values can not be lower
than output_min (400k-3.3M) there is no need to calculate a decimal for
the offset.
Fixes: 713337d9143e ("iio: pressure: Honeywell mprls0025pa pressure sensor")
Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Fix the scan_type sign and realbits assignment.
The pressure is a 24bit unsigned int between output_min and output_max.
transfer function A: 10% to 90% of 2^24
transfer function B: 2.5% to 22.5% of 2^24
transfer function C: 20% to 80% of 2^24
[MPR_FUNCTION_A] = { .output_min = 1677722, .output_max = 15099494 }
[MPR_FUNCTION_B] = { .output_min = 419430, .output_max = 3774874 }
[MPR_FUNCTION_C] = { .output_min = 3355443, .output_max = 13421773 }
Fixes: 713337d9143e ("iio: pressure: Honeywell mprls0025pa pressure sensor")
Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Interrupt falling/rising flags should only be defined in the device tree.
Fixes: 713337d9143e ("iio: pressure: Honeywell mprls0025pa pressure sensor")
Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Based on the sensor datasheet in chapter 7.6 SPI timing, Table 20,
during the SPI transfer there is a minimum time interval requirement
between the CS being asserted and the first clock edge (tHDSS).
This minimum interval of 2.5us is being violated if two consecutive SPI
transfers are queued up.
Fixes: a0858f0cd28e ("iio: pressure: mprls0025pa add SPI driver")
Datasheet: https://prod-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/products/sensors/pressure-sensors/board-mount-pressure-sensors/micropressure-mpr-series/documents/sps-siot-mpr-series-datasheet-32332628-ciid-172626.pdf?download=false
Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Make sure that the spi_transfer struct is zeroed out before use.
Fixes: a0858f0cd28e ("iio: pressure: mprls0025pa add SPI driver")
Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Do not print a duplicate error message if devm_request_irq() fails.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Replace "I2C" with "SPI" in the SPI module description.
Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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To prepare for the introduction of namespaced exports for the IIO consumer
API, remove this include directive which isn't actually used by the driver.
Signed-off-by: Romain Gantois <romain.gantois@bootlin.com>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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AD4134 is a 24-bit, 4-channel, simultaneous sampling, precision
analog-to-digital converter (ADC). The device can be managed through SPI or
direct control of pin logical levels (pin control mode). The AD4134 design
also features a dedicated bus for ADC sample data output. Though, this
initial driver for AD4134 only supports usual SPI connections.
Add basic support for AD4134 that enables single-shot ADC sample read.
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Add device tree documentation for AD4134 24-Bit, 4-channel simultaneous
sampling, precision ADC.
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Remove duplicate inclusion of linux/bitops.h.
Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Reviewed-by: Matti Vaittinen <mazziesaccount@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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The driver no longer uses iio_device_claim_buffer_mode(). Drop it from
ads1018_spi_read_exclusive() context remark.
Signed-off-by: Kurt Borja <kuurtb@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Currently BMI260 & BMI270 devices do not automatically load this
driver. To fix this, add missing MODULE_DEVICE_TABLE for the i2c,
acpi, and of device tables so the driver will load when the hardware
is detected.
Tested on my OneXPlayer F1 Pro.
Signed-off-by: Derek J. Clark <derekjohn.clark@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Replaced use of deprecated function SIMPLE_DEV_PM_OPS() with
EXPORT_GPL_SIMPLE_DEV_PM_OPS().
Removed PM preprocessor conditions with usage of pm_sleep_ptr().
Signed-off-by: Michael Harris <michaelharriscode@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Add an OF device ID table so the driver can bind automatically when
the RFD77402 sensor is described in Device Tree. This enables proper
enumeration via its compatible string and allows instantiation on
DT-based platforms.
Signed-off-by: Shrikant Raskar <raskar.shree97@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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The RF Digital RFD77402 is a Time-of-Flight (ToF) proximity and distance
sensor that provides absolute and highly accurate distance measurements
from 100 mm up to 2000 mm over an I2C interface. It includes an optional
interrupt pin that signals when new measurement data is ready.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Shrikant Raskar <raskar.shree97@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Since commit 1f4ea4838b13 ("mcb: Add missing modpost build support")
the MODULE_ALIAS() is redundant as the module alias is now
automatically generated from the MODULE_DEVICE_TABLE().
Remove the explicit alias.
No functional change intended.
Reviewed-by: Jorge Sanjuan Garcia <dev-jorge.sanjuangarcia@duagon.com>
Signed-off-by: Jose Javier Rodriguez Barbarin <dev-josejavier.rodriguez@duagon.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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configfs_group_operations
'struct configfs_item_operations' and 'configfs_group_operations' are not
modified in this driver.
Constifying these structures moves some data to a read-only section, so
increases overall security, especially when the structure holds some
function pointers.
On a x86_64, with allmodconfig:
Before:
======
text data bss dec hex filename
5037 1528 64 6629 19e5 drivers/iio/industrialio-sw-device.o
5509 1528 64 7101 1bbd drivers/iio/industrialio-sw-trigger.o
After:
=====
text data bss dec hex filename
5133 1432 64 6629 19e5 drivers/iio/industrialio-sw-device.o
5605 1432 64 7101 1bbd drivers/iio/industrialio-sw-trigger.o
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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The code for this never went upstream. It was replaced by other code,
so this should be dropped.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=216748
Fixes: cf996f039679 ("iio: test: test gain-time-scale helpers")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Be consistent and use dev_err_probe() as in all other places in the
.probe() path.
While at it, remove the line break in the version condition. Yes, it
goes over the 80 column limit but I do think the line break hurts
readability in this case.
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Use a local struct device variable to improve readability in some code
paths during probe. While at it, fix some line breaks not properly
aligned to the open parenthesis.
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Simplify the probe function by using a local 'dev' variable instead of
full pointer dereference. This makes several lines shorter, which
allows to avoid wrapping making code more readable.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Simplify the probe function by using local 'dev' and 'np' variables
instead of full pointer dereferences. This makes several lines shorter,
which allows to avoid wrapping making code more readable.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Simplify the probe function by using local 'dev' and 'np' variables
instead of full pointer dereferences. This makes several lines shorter,
which allows to avoid wrapping making code more readable. While
touching the return line, simplify by avoiding unnecessary 'ret'
assignment.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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When gp0 or gp1 is not taken as an interrupt, expose them as GPO if
gpio-contoller is set in the devicetree. gpio-regmap is not used
because the GPO static low is 'b101 and static high is 0b110; low state
requires setting bit 0, not fitting the abstraction of low=0 and
high=mask.
Signed-off-by: Jorge Marques <jorge.marques@analog.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Explains the GPIO controller support with emphasis on the mask
depending on which GPs are exposed.
Signed-off-by: Jorge Marques <jorge.marques@analog.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Adds support for IIO Events. Optionally, gp0 is assigned as Threshold
Either signal, if not present, fallback to an I3C IBI with the same
role.
Signed-off-by: Jorge Marques <jorge.marques@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Explains the IIO Events support.
Signed-off-by: Jorge Marques <jorge.marques@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Adds support for IIO Trigger. Optionally, gp1 is assigned as Data Ready
signal, if not present, fallback to an I3C IBI with the same role.
The software trigger is allocated by the device, but must be attached by
the user before enabling the buffer. The purpose is to not impede
removing the driver due to the increased reference count when
iio_trigger_set_immutable() or iio_trigger_get() is used.
Signed-off-by: Jorge Marques <jorge.marques@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Explains the IIO Trigger support and timings involved.
Signed-off-by: Jorge Marques <jorge.marques@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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The AD4060/AD4062 are versatile, 16-bit/12-bit, successive approximation
register (SAR) analog-to-digital converter (ADC) with low-power and
threshold monitoring modes.
Signed-off-by: Jorge Marques <jorge.marques@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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This adds a new page to document how to use the ad4062 ADC driver.
Signed-off-by: Jorge Marques <jorge.marques@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Add dt-bindings for AD4062 family, devices AD4060/AD4062, low-power with
monitor capabilities SAR ADCs. Each variant of the family differs in
resolution. The device contains two outputs (gp0, gp1). The outputs can
be configured for range of options, such as threshold and data ready.
The device uses a 2-wire I3C interface.
Signed-off-by: Jorge Marques <jorge.marques@analog.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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This is the iio driver for Microchip MCP47F(E/V)B(0/1/2)1,
MCP47F(E/V)B(0/1/2)2, MCP47F(E/V)B(0/1/2)4 and MCP47F(E/V)B(0/1/2)8 series
of buffered voltage output Digital-to-Analog Converters with nonvolatile or
volatile memory and an I2C Interface.
The families support up to 8 output channels.
The devices can be 8-bit, 10-bit and 12-bit.
Signed-off-by: Ariana Lazar <ariana.lazar@microchip.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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This is the device tree schema for iio driver for Microchip
MCP47F(E/V)B(0/1/2)1, MCP47F(E/V)B(0/1/2)2, MCP47F(E/V)B(0/1/2)4 and
MCP47F(E/V)B(0/1/2)8 series of buffered voltage output Digital-to-Analog
Converters with nonvolatile or volatile memory and an I2C Interface.
The families support up to 8 output channels.
The devices can be 8-bit, 10-bit and 12-bit.
Signed-off-by: Ariana Lazar <ariana.lazar@microchip.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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bitmap_full() is less verbose and more efficient, as it stops traversing
scan_mask as soon as the 1st unset bit found.
Signed-off-by: Yury Norov (NVIDIA) <yury.norov@gmail.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Remove unnecessary blank lines between comment sections to improve
readability.
Signed-off-by: Tomas Borquez <tomasborquez13@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Add mmc5633 sensor basic support.
- Support read 20 bits X/Y/Z magnetic.
- Support I3C HDR mode to send start measurememt command.
- Support I3C HDR mode to read all sensors data by one command.
Co-developed-by: Carlos Song <carlos.song@nxp.com>
Signed-off-by: Carlos Song <carlos.song@nxp.com>
Co-developed-by: Adrian Fluturel <fluturel.adrian@gmail.com>
Signed-off-by: Adrian Fluturel <fluturel.adrian@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Add compatible string 'memsic,mmc5603' and 'memsic,mmc5633' for
MEMSIC 3-axis magnetometer.
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Add ti-ads1018 driver for Texas Instruments ADS1018 and ADS1118 SPI
analog-to-digital converters.
This chips' MOSI pin is shared with a data-ready interrupt. Defining
this interrupt in devicetree is optional, therefore we only create an
IIO trigger if one is found.
Handling this interrupt requires some considerations. When enabling the
trigger the CS line is tied low (active), thus we need to hold
spi_bus_lock() too, to avoid state corruption. This is done inside the
set_trigger_state() callback, to let users use other triggers without
wasting a bus lock.
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Kurt Borja <kuurtb@gmail.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Add documentation for Texas Instruments ADS1018 and ADS1118
analog-to-digital converters.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Kurt Borja <kuurtb@gmail.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Delete iio_device_claim_direct_mode() when reading temperature.
It enables polling of temperature data while buffer is on and it
doesn't have any impact on the other sensors.
Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Allow the user to select either the SPI or the i2c bus specific
module and autoselect core if needed.
Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro>
Reviewed-by: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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