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ad7386/7/8(-4) single-ended parts have a 2:1 mux in front of each ADC.
>From an IIO point of view, all inputs are exported, i.e ad7386/7/8
export 4 channels and ad7386-4/7-4/8-4 export 8 channels. First inputs
of muxes correspond to the first half of IIO channels (i.e 0-1 or 0-3)
and second inputs correspond to second half (i.e 2-3 or 4-7)
Currently, the driver supports only sampling first half OR second half of
the IIO channels. To enable sampling all channels simultaneously, these
parts have an internal sequencer that automatically cycles through the
mux entries.
When enabled, the maximum throughput is divided by two. Moreover, the ADCs
need additional settling time, so we add an extra CS toggle to correctly
propagate setting, and an additional spi transfer to read the second
half.
Signed-off-by: Julien Stephan <[email protected]>
Reviewed-by: David Lechner <[email protected]>
Link: https://patch.msgid.link/20240731-ad7380-add-single-ended-chips-v2-6-cd63bf05744c@baylibre.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Adding ad7386/7/8 (16/14/12 bits) unsigned, dual simultaneous sampling,
single-ended compatible parts, and the corresponding ad7386-4/7-4/8-4
4 channels.
These parts have a 2:1 multiplexer in front of each ADC. They also include
additional configuration registers that allow for either manual selection
or automatic switching (sequencer mode), of the multiplexer inputs.
This commit focus on integrating manual selection. Sequencer mode will
be implemented later.
>From an IIO point of view, all inputs are exported, i.e ad7386/7/8
export 4 channels and ad7386-4/7-4/8-4 export 8 channels.
Inputs AinX0 of multiplexers correspond to the first half of IIO channels
(i.e 0-1 or 0-3) and inputs AinX1 correspond to second half (i.e 2-3 or
4-7). Example for AD7386/7/8 (2 channels parts):
IIO | AD7386/7/8
| +----------------------------
| | _____ ______
| | | | | |
voltage0 | AinA0 --|--->| | | |
| | | mux |----->| ADCA |---
voltage2 | AinA1 --|--->| | | |
| | |_____| |_____ |
| | _____ ______
| | | | | |
voltage1 | AinB0 --|--->| | | |
| | | mux |----->| ADCB |---
voltage3 | AinB1 --|--->| | | |
| | |_____| |______|
| |
| +----------------------------
When switching channel, the ADC require an additional settling time.
According to the datasheet, data is valid on the third CS low. We already
have an extra toggle before each read (either direct reads or buffered
reads) to sample correct data, so we just add a single CS toggle at the
end of the register write.
Signed-off-by: Julien Stephan <[email protected]>
Reviewed-by: David Lechner <[email protected]>
Link: https://patch.msgid.link/20240731-ad7380-add-single-ended-chips-v2-5-cd63bf05744c@baylibre.com
Signed-off-by: Jonathan Cameron <[email protected]>
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ad738x family contains single-ended parts that have a 2:1 mux in front
of ADC, so the number of IIO channels is different from the number of
simultaneous channels that can be sampled.
To prepare the support for single-ended parts, introduce a new
num_simultaneous_channels variable. For currently supported parts,
num_simultaneous_channels is equal to num_channels minus 1 (the
timestamps channel)
Signed-off-by: Julien Stephan <[email protected]>
Reviewed-by: David Lechner <[email protected]>
Link: https://patch.msgid.link/20240731-ad7380-add-single-ended-chips-v2-4-cd63bf05744c@baylibre.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Add missing trailing commas in iio_scan_type structures
Signed-off-by: Julien Stephan <[email protected]>
Reviewed-by: David Lechner <[email protected]>
Link: https://patch.msgid.link/20240731-ad7380-add-single-ended-chips-v2-3-cd63bf05744c@baylibre.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Add a function to retrieve the index of the active scan mask inside the
available scan masks array.
As in iio_scan_mask_match and iio_sanity_check_avail_scan_masks,
this function does not handle multi-long masks correctly.
It only checks the first long to be zero, and will use such mask
as a terminator even if there was bits set after the first long.
This should be fine since the available_scan_mask has already been
sanity tested using iio_sanity_check_avail_scan_masks.
See iio_scan_mask_match and iio_sanity_check_avail_scan_masks for
more details
Signed-off-by: Julien Stephan <[email protected]>
Reviewed-by: David Lechner <[email protected]>
Link: https://patch.msgid.link/20240731-ad7380-add-single-ended-chips-v2-2-cd63bf05744c@baylibre.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Adding ad7386/7/8 single-ended compatible parts, and the corresponding
ad7386-4/7-4/8-4 4 channels.
Acked-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Julien Stephan <[email protected]>
Reviewed-by: David Lechner <[email protected]>
Link: https://patch.msgid.link/20240731-ad7380-add-single-ended-chips-v2-1-cd63bf05744c@baylibre.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Reviewed-by: David Lechner <[email protected]>
Signed-off-by: Marcelo Schmitt <[email protected]>
Reviewed-by: Jonathan Cameron <[email protected]>
Tested-by: David Lechner <[email protected]>
Link: https://patch.msgid.link/aeee5fd9deccf85beadecf58c9b938b97a3aeba5.1720810545.git.marcelo.schmitt@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Add support for AD4000 series of low noise, low power, high speed,
successive approximation register (SAR) ADCs.
Reviewed-by: Nuno Sa <[email protected]>
Reviewed-by: David Lechner <[email protected]>
Signed-off-by: Marcelo Schmitt <[email protected]>
Link: https://patch.msgid.link/356109ac61182f16f2379d5d0cadccfe017f505b.1720810545.git.marcelo.schmitt@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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spi: Support MOSI idle configuration
Add support for configuring the idle state of the MOSI signal in
controllers.
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Add separate handling for adf4378 within the driver.
The main difference between adf4377 and adf4378 is that adf4378 has only
one output which is handled by only one gpio.
Signed-off-by: Antoniu Miclaus <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>
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The adf4378 provides only one output channel. Therefore there is only
one gpio available to enable the output. Reflect that into the bindings
using property conditions.
Add product link for the adf4378.
Signed-off-by: Antoniu Miclaus <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>
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STK3013 is a proximity sensor by Sensortek, bearing chipid of 0x31. Despite
being marketed as a proximity sensor, it also appears to have ambient
light sensing capabilities.
The part is fully compatible with the existing implementation of the
device driver. Add the compatible string of stk3013 to the existing
list, with a fallback of stk3310.
Signed-off-by: Kaustabh Chakraborty <[email protected]>
Acked-by: Rob Herring (Arm) <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>
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Add support for Sensortek's STK3013 in the driver. The part bears the
product ID 0x31.
As seen in [1], Sensortek lists STK3013 as a proximity sensor. But it
has been experimentally observed that they do have ambient light sensing
capabilities. Furthermore, [2] implements a proximity and ambient light
sensor driver for STK3x1x devices, which is also indicative of the fact
that these parts are also ambient light sensors.
[1] https://www.sensortek.com.tw/index.php/en/products/optical-sensor/
[2] https://android.googlesource.com/kernel/msm.git/+/e6dfa4641d88201e8019be19ff557e5d2cf4572f
Signed-off-by: Kaustabh Chakraborty <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>
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In order to allow newer devices which are compatible with existing
sensors, issuing a warning for an unknown chipid indicates that
something has gone wrong with the init process, which isn't ideal.
Swap it with a friendlier info message to get things right.
Suggested-by: Conor Dooley <[email protected]>
Signed-off-by: Kaustabh Chakraborty <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>
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Use devm_regulator_get_enable_read_voltage() to replace
tsc2046_adc_configure_regulator() which does the same thing.
Signed-off-by: David Lechner <[email protected]>
Reviewed-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240725-iio-regulator-refactor-round-4-v1-1-55e9dc1de325@baylibre.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Add myself as a maintainer for Sensirion SDP500 pressure sensor driver
Signed-off-by: Petar Stoykov <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>
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Sensirion SDP500 is a digital differential pressure sensor. The sensor is
accessed over I2C.
Signed-off-by: Petar Stoykov <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>
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Sensirion SDP500 is a digital differential pressure sensor. It provides
a digital I2C output. Add devicetree bindings requiring the compatible
string and I2C slave address (reg).
Signed-off-by: Petar Stoykov <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>
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Add support for Microchip PAC1921 Power/Current monitor.
Implemented features:
* capture of bus voltage, sense voltage, current and power measurements
in free-run integration mode
* support for both raw and triggered buffer reading
* support for overflow events
* scale attributes to control voltage and current gains
* oversampling ratio attribute to control the number of integration
samples
* sampling rate attribute that reflects the integration period
* userspace attribute and DT parameter to control shunt resistor
* simple power management support
Limitations:
* operation mode fixed to free-run integration
* READ/INT pin and OUT pin not supported
* no controls for measurement resolutions and filters
Signed-off-by: Matteo Martelli <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>
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Add binging for Microchip PAC1921 Power/Current monitor
Reviewed-by: Rob Herring (Arm) <[email protected]>
Reviewed-by: Conor Dooley <[email protected]>
Signed-off-by: Matteo Martelli <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>
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By converting it to static, we ensure that this will be placed by the
compiler in the read-only area.
Signed-off-by: Vasileios Amoiridis <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>
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Avoid unnecessary pollution of the global symbol namespace and move
global APIs into a specific namespace. Import that into the places that
use them
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-dma-buf-mod-namespace-v1-1-8877cfe7f68e@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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This makes use of the new devm_regulator_get_enable_read_voltage()
helper function to reduce boilerplate code in the MCP3564 ADC driver.
The error message is slightly changed since there are fewer error
return paths.
Setting adc->vref_mv is consolidated into a single place to make the
logic easier to follow.
A use_internal_vref_attr local variable is added to make it more
obvious what the difference between the two iio info structures is.
The return value of the "Unknown Vref" dev_err_probe() is hard-coded to
-ENODEV instead of ret since it was getting a bit far from where ret
was set and logically that is the only value it could have.
Signed-off-by: David Lechner <[email protected]>
Reviewed-by: Marius Cristea <[email protected]>
Link: https://patch.msgid.link/20240723-iio-regulator-refactor-round-3-v2-1-ae9291201785@baylibre.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Now that all users are using the proper accessors, we can mark
masklength as __private so that no one tries to write. We also get help
from checkers in warning us in case someone does it.
To access the private field from IIO core code, we need to use the
ACCESS_PRIVATE() macro.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-23-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_get_masklength() to access '.masklength' so it can be annotated
as __private when there are no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-22-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Make use of iio_get_masklength) and iio_for_each_active_channel() to
access '.masklength' so it can be annotated as __private when there
are no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-21-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Make use of iio_get_masklength) and iio_for_each_active_channel() to
access '.masklength' so it can be annotated as __private when there
are no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-20-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_get_masklength() to access '.masklength' so it can be annotated
as __private when there are no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-19-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_for_each_active_channel() to iterate over active channels
accessing '.masklength' so it can be annotated as __private when there are
no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-18-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_for_each_active_channel() to iterate over active channels
accessing '.masklength' so it can be annotated as __private when there are
no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-17-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_for_each_active_channel() to iterate over active channels
accessing '.masklength' so it can be annotated as __private when there are
no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-16-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_for_each_active_channel() to iterate over active channels
accessing '.masklength' so it can be annotated as __private when there are
no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-15-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_for_each_active_channel() to iterate over active channels
accessing '.masklength' so it can be annotated as __private when there are
no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-14-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_get_masklength() to access '.masklength' so it can be annotated
as __private when there are no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Reviewed-by: João Paulo Gonçalves <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-13-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_get_masklength() to access '.masklength' so it can be annotated
as __private when there are no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-12-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_for_each_active_channel() to iterate over active channels
accessing '.masklength' so it can be annotated as __private when there are
no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-11-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_for_each_active_channel() to iterate over active channels
accessing '.masklength' so it can be annotated as __private when there are
no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-10-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_get_masklength() to access '.masklength' so it can be annotated
as __private when there are no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-9-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_get_masklength() to access '.masklength' so it can be annotated
as __private when there are no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-8-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_for_each_active_channel() to iterate over active channels
accessing '.masklength' so it can be annotated as __private when there are
no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-7-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_for_each_active_channel() to iterate over active channels
accessing '.masklength' so it can be annotated as __private when there are
no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Acked-by: Heiko Stuebner <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-6-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_for_each_active_channel() to iterate over active channels
accessing '.masklength' so it can be annotated as __private when there are
no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-5-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_for_each_active_channel() to iterate over active channels
accessing '.masklength' so it can be annotated as __private when there are
no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-4-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_for_each_active_channel() to iterate over active channels
accessing '.masklength' so it can be annotated as __private when there are
no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-3-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_for_each_active_channel() to iterate over active channels
accessing '.masklength' so it can be annotated as __private when there are
no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-2-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Use iio_get_masklength() to access '.masklength' so it can be annotated
as __private when there are no more direct users of it.
Signed-off-by: Nuno Sa <[email protected]>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-1-82913fc0fb87@analog.com
Signed-off-by: Jonathan Cameron <[email protected]>
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This fixes the spelling in IIO_BACKEND_INTERNAL_CONTINUOUS_WAVE.
Signed-off-by: David Lechner <[email protected]>
Link: https://patch.msgid.link/20240726-iio-backend-spelling-continuous-v1-1-467c6e3f78ff@baylibre.com
Signed-off-by: Jonathan Cameron <[email protected]>
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Move ABI documentation for custom shunt resistor attributes into the
generic iio documentation file. Exception for pac1934: leave it
untouched since it does not comply with common iio ABI generalization.
Signed-off-by: Matteo Martelli <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>
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static
Don't populate the read-only array conversion_time_max on the stack at
run time, instead make it static.
Signed-off-by: Colin Ian King <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>
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Add support for BH1745, which is an I2C colour sensor with red, green,
blue and clear channels. It has a programmable active low interrupt
pin. Interrupt occurs when the signal from the selected interrupt
source channel crosses set interrupt threshold high or low level.
Interrupt source for the device can be configured by enabling the
corresponding event. Interrupt latch is always enabled when setting
up interrupt.
Add myself as the maintainer for this driver in MAINTAINERS.
Signed-off-by: Mudit Sharma <[email protected]>
Reviewed-by: Ivan Orlov <[email protected]>
Reviewed-by: Javier Carrasco <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>
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