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We should not be assuming that we are reading a sequence of
registers as here we are doing a read of a lot of data from
a single register address.
Not marked for stable as by coincidence it being wrong doesn't
make any difference.
Suggested-by: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
Link: https://lore.kernel.org/r/20200722155103.979802-19-jic23@kernel.org
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This case is a bit different to the rest of the series. The driver
was doing a regmap_bulk_read into a buffer that wasn't dma safe
as it was on the stack with no guarantee of it being in a cacheline
on it's own. Fixing that also dealt with the data leak and
alignment issues that Lars-Peter pointed out.
Also removed some unaligned handling as we are now aligned.
Fixes tag is for the dma safe buffer issue. Potentially we would
need to backport timestamp alignment futher but that is a totally
different patch.
Fixes: fd64df16f40e ("iio: imu: inv_mpu6050: Add SPI support for MPU6000")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
Cc: <Stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200722155103.979802-18-jic23@kernel.org
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One of a class of bugs pointed out by Lars in a recent review.
iio_push_to_buffers_with_timestamp assumes the buffer used is aligned
to the size of the timestamp (8 bytes). This is not guaranteed in
this driver which uses an array of smaller elements on the stack.
We move to a suitable structure in the iio_priv() data with alignment
explicitly requested. This data is allocated with kzalloc so no
data can leak apart from previous readings. Note that previously
no leak at all could occur, but previous readings should never
be a problem.
In this case the timestamp location depends on what other channels
are enabled. As such we can't use a structure without misleading
by suggesting only one possible timestamp location.
Fixes: 50a6edb1b6e0 ("iio: adc: add ADC12130/ADC12132/ADC12138 ADC driver")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Cc: <Stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200722155103.979802-26-jic23@kernel.org
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One of a class of bugs pointed out by Lars in a recent review.
iio_push_to_buffers_with_timestamp assumes the buffer used is aligned
to the size of the timestamp (8 bytes). This is not guaranteed in
this driver which uses an array of smaller elements on the stack.
We fix this issues by moving to a suitable structure in the iio_priv()
data with alignment explicitly requested. This data is allocated
with kzalloc so no data can leak apart from previous readings.
Note that previously no data could leak 'including' previous readings
but I don't think it is an issue to potentially leak them like
this now does.
In this case the postioning of the timestamp is depends on what
other channels are enabled. As such we cannot use a structure to
make the alignment explicit as it would be missleading by suggesting
only one possible location for the timestamp.
Fixes: 815bbc87462a ("iio: ti-adc0832: add triggered buffer support")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Cc: <Stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200722155103.979802-25-jic23@kernel.org
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One of a class of bugs pointed out by Lars in a recent review.
iio_push_to_buffers_with_timestamp assumes the buffer used is aligned
to the size of the timestamp (8 bytes). This is not guaranteed in
this driver which uses an array of smaller elements on the stack.
As Lars also noted this anti pattern can involve a leak of data to
userspace and that indeed can happen here. We close both issues by
moving to an array of suitable structures in the iio_priv() data.
This data is allocated with kzalloc so no data can leak apart from
previous readings.
For the tagged path the data is aligned by using __aligned(8) for
the buffer on the stack.
There has been a lot of churn in this driver, so likely backports
may be needed for stable.
Fixes: 290a6ce11d93 ("iio: imu: add support to lsm6dsx driver")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Cc: <Stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200722155103.979802-17-jic23@kernel.org
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One of a class of bugs pointed out by Lars in a recent review.
iio_push_to_buffers_with_timestamp assumes the buffer used is aligned
to the size of the timestamp (8 bytes). This is not guaranteed in
this driver which uses a 24 byte array of smaller elements on the stack.
As Lars also noted this anti pattern can involve a leak of data to
userspace and that indeed can happen here. We close both issues by
moving to a suitable array in the iio_priv() data with alignment
explicitly requested. This data is allocated with kzalloc so no
data can leak appart from previous readings.
Depending on the enabled channels, the location of the timestamp
can be at various aligned offsets through the buffer. As such we
any use of a structure to enforce this alignment would incorrectly
suggest a single location for the timestamp. Comments adjusted to
express this clearly in the code.
Fixes: ac45e57f1590 ("iio: light: Add driver for Silabs si1132, si1141/2/3 and si1145/6/7 ambient light, uv index and proximity sensors")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Cc: <Stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200722155103.979802-9-jic23@kernel.org
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One of a class of bugs pointed out by Lars in a recent review.
iio_push_to_buffers_with_timestamp assumes the buffer used is aligned
to the size of the timestamp (8 bytes). This is not guaranteed in
this driver which uses a 16 byte array of smaller elements on the stack.
This is fixed by using an explicit c structure. As there are no
holes in the structure, there is no possiblity of data leakage
in this case.
The explicit alignment of ts is not strictly necessary but potentially
makes the code slightly less fragile. It also removes the possibility
of this being cut and paste into another driver where the alignment
isn't already true.
Fixes: 36e0371e7764 ("iio:itg3200: Use iio_push_to_buffers_with_timestamp()")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: <Stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200722155103.979802-6-jic23@kernel.org
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Potential error return is not checked. This can lead to use
of undefined data.
Detected by clang static analysis.
st_lsm6dsx_shub.c:540:8: warning: Assigned value is garbage or undefined
*val = (s16)le16_to_cpu(*((__le16 *)data));
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Fixes: c91c1c844ebd ("iio: imu: st_lsm6dsx: add i2c embedded controller support")
Signed-off-by: Tom Rix <trix@redhat.com
Cc: <Stable@vger.kernel.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200809175551.6794-1-trix@redhat.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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As part of the general cleanup of indio_dev->mlock, this change replaces
it with a local lock, to protect potential concurrent access to the
completion callback during a conversion.
This is part of a bigger cleanup.
Link: https://lore.kernel.org/linux-iio/CA+U=Dsoo6YABe5ODLp+eFNPGFDjk5ZeQEceGkqjxXcVEhLWubw@mail.gmail.com/
Signed-off-by: Sergiu Cuciurean <sergiu.cuciurean@analog.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20200916093123.78954-1-alexandru.ardelean@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Scaling factor values for Acc lead to an unacceptable rounding of the
full scale (FS) calculated by some SensorHAL on Android devices. For examples
setting FS to 4g the in_accel_x_scale, in_accel_y_scale and in_accel_z_scale
are 0.001196 on 6 decimal digits and the FS is
0.001196 × ((2^15) − 1) ~= 39.1893 m/s^2.
Android CTS R10 SensorParameterRangeTest test expects a value greater than
39.20 m/s^2 so this test fails (ACCELEROMETER_MAX_RANGE = 4 * 9.80).
Using 9 decimal digits the new scale factor is 0.001196411 and the FS now
is 0.001196411 × ((2^15)−1) ~= 39.2028 m/s^2.
This patch extends to IIO_VAL_INT_PLUS_NANO type the scaling factor to all
IMU devices where SensorParameterRangeTest CTS test fails.
Signed-off-by: Mario Tesi <mario.tesi@st.com>
Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/1600361236-2285-1-git-send-email-martepisa@gmail.com
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Burst mode variables are now part of the `adis_data` struct. The driver
also has now to explicitly define the length of the burst buffer.
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20200917155223.218500-4-nuno.sa@analog.com
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Burst mode variables are now part of the `adis_data` struct. The driver
also has now to explicitly define the length of the burst buffer.
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20200917155223.218500-3-nuno.sa@analog.com
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Add burst mode variables in the per device specific data structure. As
some drivers support multiple devices with different burst sizes it
makes sense this data to be in `adis_data`. While moving the variables,
there are two main differences:
1. The `en`variable is dropped. If a device supports burst mode, it will
just use it as it will has better performance for almost all real use
cases.
2. Replace `extra_len` by `burst_len`. Users should now explicitly
define the length of the burst buffer as it is typically constant. This
also allows to remove the following line from the library:
```
/* All but the timestamp channel */
burst_length = (indio_dev->num_channels - 1) * sizeof(u16);
```
The library should not assume that a timestamp channel is defined.
Moreover, most parts also include some diagnostic data, crc, etc.. in
the burst buffer that needed to be included in an `extra_len` variable
which is not that nice. On top of this, some devices already start to
have some 32bit size channels ...
This patch is also a move to completely drop the `struct adis_burst`
from the library.
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20200917155223.218500-2-nuno.sa@analog.com
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Given a value of 1 corresponds to IIO_SHARE_BY_TYPE I have replaced
it with that. Should cause no functional change.
Fixes: fdadbce0da42 ("iio: add Bosch BMA180 acceleration sensor driver")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Matt Ranostay <matt.ranostay@konsulko.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Oleksandr Kravchenko <o.v.kravchenko@globallogic.com>
Cc: Peter Meerwald <pmeerw@pmeerw.net>
Cc: Jonathan Bakker <xc-racer2@live.ca>
Link: https://lore.kernel.org/r/20200913121227.764626-1-jic23@kernel.org
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So it's obvious that the code is wrong in passing true, but I'm assuming
that will actually evaluate to 1 and hence IIO_SHARED_BY_TYPE.
The documentation however has this attribute as IIO_SHARED_BY_ALL.
My current assumption is the documentation is wrong.
If anyone knows otherwise please shout out!
Fixes: 7247645f6865 ("iio: hmc5843: Move hmc5843 out of staging")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Matt Ranostay <matt.ranostay@konsulko.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Tested-by: H. Nikolaus Schaller <hns@goldelico.com>
Link: https://lore.kernel.org/r/20200913112546.715624-1-jic23@kernel.org
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A partial set of these was added to IIO a long time back.
This fills in some gaps in coverage highlighted by building
with W=1
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200913132115.800131-3-jic23@kernel.org
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One comment isn't kernel-doc at all, but starts with /** and another
is simply missing a parameter that was introduced recently.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200913132115.800131-4-jic23@kernel.org
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Since there was a recently discovered issue with these locks, it probably
makes sense to cleanup the code a bit, to prevent it from being used as an
example/reference.
This change moves the lock only where it is explicitly needed to protect
resources from potential concurrent accesses.
It also reworks the switch statements to do direct returns vs caching the
return value on a variable.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20200706110259.23947-3-alexandru.ardelean@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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The next rework may require an unindentation of a code block in
ad5592r_read_raw(), which would make review a bit more difficult.
This change unindents the code block for reading the scale of the
non-temperature channels.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20200706110259.23947-2-alexandru.ardelean@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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struct iio_chan_spec_ext_info shared element is of type
enum iio_shared_by, not boolean. It's like the enum value
will for IIO_SHARED_BY_TYPE == 1 == true, hence no actual
problem has been observed.
CC [M] drivers/iio/dac/ad5592r-base.o
491 | .shared = true,
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Fixes: 56ca9db862bf ("iio: dac: Add support for the AD5592R/AD5593R ADCs/DACs")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20200722142515.897378-1-jic23@kernel.org
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Fixes the following W=1 kernel build warning(s):
drivers/iio/chemical/sgp30.c:236: warning: Function parameter or member 'duration_us' not described in 'sgp_read_cmd'
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Cc: Andreas Brauchli <a.brauchli@elementarea.net>
Cc: Pascal Sachs <pascal.sachs@sensirion.com>
Link: https://lore.kernel.org/r/20200716135928.1456727-6-lee.jones@linaro.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Kerneldoc expects attributes/parameters to be in '@*.: ' format.
Fixes the following W=1 kernel build warning(s):
drivers/iio/gyro/adis16080.c:49: warning: Function parameter or member 'lock' not described in 'adis16080_state'
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Cc: Michael Hennerich <Michael.Hennerich@analog.com>
Cc: Barry Song <21cnbao@gmail.com>
Link: https://lore.kernel.org/r/20200716135928.1456727-13-lee.jones@linaro.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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'irq_sim_domain'
File headers are not good candidates for kerneldoc.
Fixes the following W=1 kernel build warning(s):
drivers/iio/dummy/iio_dummy_evgen.c:30: warning: Cannot understand * @regs: irq regs we are faking
on line 30 - I thought it was a doc line
drivers/iio/dummy/iio_dummy_evgen.c:42: warning: Function parameter or member 'irq_sim_domain' not described in 'iio_dummy_eventgen'
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Link: https://lore.kernel.org/r/20200716135928.1456727-16-lee.jones@linaro.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Fixes the following W=1 kernel build warning(s):
drivers/iio/adc/ad7949.c:58: warning: Function parameter or member 'indio_dev' not described in 'ad7949_adc_chip'
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Cc: Michael Hennerich <Michael.Hennerich@analog.com>
Cc: Charles-Antoine Couret <charles-antoine.couret@essensium.com>
Link: https://lore.kernel.org/r/20200716135928.1456727-18-lee.jones@linaro.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Misspelling, missing description.
Fixes the following W=1 kernel build warning(s):
drivers/iio/dac/ad5064.c:71: warning: bad line: internal vref.
drivers/iio/dac/ad5064.c:83: warning: Function parameter or member 'channels' not described in 'ad5064_chip_info'
drivers/iio/dac/ad5064.c:125: warning: Function parameter or member 'lock' not described in 'ad5064_state'
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Cc: Michael Hennerich <Michael.Hennerich@analog.com>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20200716135928.1456727-20-lee.jones@linaro.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Fixes the following W=1 kernel build warning(s):
drivers/iio/dac/ad7303.c:49: warning: Function parameter or member 'vdd_reg' not described in 'ad7303_state'
drivers/iio/dac/ad7303.c:49: warning: Function parameter or member 'vref_reg' not described in 'ad7303_state'
drivers/iio/dac/ad7303.c:49: warning: Function parameter or member 'lock' not described in 'ad7303_state'
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Cc: Michael Hennerich <Michael.Hennerich@analog.com>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20200716135928.1456727-31-lee.jones@linaro.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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As part of the general cleanup of indio_dev->mlock, this change replaces
it with a local lock, to protect against any other accesses during the
reading of sample. Reading a sample requires multiple consecutive regmap
operations and a completion callback, so this requires that no other
read occurs until it completes.
This is part of a bigger cleanup.
Link: https://lore.kernel.org/linux-iio/CA+U=Dsoo6YABe5ODLp+eFNPGFDjk5ZeQEceGkqjxXcVEhLWubw@mail.gmail.com/
Signed-off-by: Sergiu Cuciurean <sergiu.cuciurean@analog.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20200916092928.78026-1-alexandru.ardelean@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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VL53L0X can be configured to use interrupt pin (GPIO1)
to notify host about readiness of new measurement.
If interrupt pin is not specified, driver still uses polling.
Signed-off-by: Ivan Drobyshevskyi <drobyshevskyi@gmail.com>
Link: https://lore.kernel.org/r/20200916074458.873359-2-drobyshevskyi@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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This enables use of the driver with ACPI PRP0001 and also removes
an antipattern that I am trying to clear out of IIO to avoid
it being copied into new drivers.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Matt Ranostay <matt.ranostay@konsulko.com>
Link: https://lore.kernel.org/r/20200910173242.621168-39-jic23@kernel.org
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This prevents use of this driver with ACPI via PRP0001 and is
an example of an anti pattern I'm trying to remove from IIO.
Hence drop from this driver.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: David Barksdale <dbarksdale@uplogix.com>
Link: https://lore.kernel.org/r/20200910173242.621168-38-jic23@kernel.org
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This prevents use of this driver with ACPI via PRP0001 and is
an example of an anti pattern I'm trying to remove from IIO.
Hence drop from this driver.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Ludovic Tancerel <ludovic.tancerel@maplehightech.com>
Link: https://lore.kernel.org/r/20200910173242.621168-37-jic23@kernel.org
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This prevents use of this driver with ACPI via PRP0001 and is
an example of an anti pattern I'm trying to remove from IIO.
Hence drop from this driver.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20200910173242.621168-36-jic23@kernel.org
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Both would result in only a small size saving. For simplicity it
is best to remove them. I also wish to remove both these antipatterns
from IIO.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Tested-by: Jonathan Albrieux <jonathan.albrieux@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Jonathan Albrieux <jonathan.albrieux@gmail.com>
Link: https://lore.kernel.org/r/20200910173242.621168-35-jic23@kernel.org
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This prevents use of this driver with ACPI via PRP0001 and is
an example of an anti pattern I'm trying to remove from IIO.
Hence drop from this driver.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Matt Ranostay <matt.ranostay@konsulko.com>
Link: https://lore.kernel.org/r/20200910173242.621168-34-jic23@kernel.org
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This change allows the driver to be used with ACPI PRP0001 and removes
an antipattern that I want to avoid being copied into new IIO drivers.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Matt Ranostay <matt.ranostay@konsulko.com>
Link: https://lore.kernel.org/r/20200910173242.621168-33-jic23@kernel.org
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This makes the existing code easier to read and will make the following
patch a little simpler.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Matt Ranostay <matt.ranostay@konsulko.com>
Link: https://lore.kernel.org/r/20200910173242.621168-32-jic23@kernel.org
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This prevents use of this driver with ACPI via PRP0001 and is
an example of an anti pattern I'm trying to remove from IIO.
Hence drop from this driver.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Matt Ranostay <matt.ranostay@konsulko.com>
Link: https://lore.kernel.org/r/20200910173242.621168-31-jic23@kernel.org
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This change allow the driver to be used with ACPI PRP0001 and removes
an antipattern that I want to avoid being copied into new IIO drivers.
The handling of match_data uses a different approach as
device_get_match_data() doesn't distinguish between no match, and
a match but with NULL data.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Matt Ranostay <matt.ranostay@konsulko.com>
Link: https://lore.kernel.org/r/20200910173242.621168-30-jic23@kernel.org
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Avoids lots of repetition of &client->dev and will make the next
patch tidier.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Matt Ranostay <matt.ranostay@konsulko.com>
Link: https://lore.kernel.org/r/20200910173242.621168-29-jic23@kernel.org
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This change allow the driver to be used with ACPI PRP0001 and removes
an antipattern that I want to avoid being copied into new IIO drivers.
The handling of match_data uses a different approach as
device_get_match_data doesn't distinguish between no match, and
a match but with NULL data.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Andreas Brauchli <andreas.brauchli@sensirion.com>
Link: https://lore.kernel.org/r/20200910173242.621168-28-jic23@kernel.org
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This cleans up the code at bit, but is primarily here as a precusor
to the next patch. I've only done this for the two functions
which use the dev pointer repeatedly.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Andreas Brauchli <andreas.brauchli@sensirion.com>
Link: https://lore.kernel.org/r/20200910173242.621168-27-jic23@kernel.org
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of_match_ptr() prevents use of this driver with ACPI via PRP0001 and is
an example of an anti pattern I'm trying to remove from IIO.
Hence drop from this driver and use generic fw accessors to check
if there is a fw_node and get the id.
It might be neater to use pointers rather than indexes for
the device_data but that is another issue and should be handled
separately.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Matt Ranostay <matt.ranostay@konsulko.com>
Link: https://lore.kernel.org/r/20200910173242.621168-26-jic23@kernel.org
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This prevents use of this driver with ACPI via PRP0001 and is
an example of an anti pattern I'm trying to remove from IIO.
Hence drop from this driver.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Matt Ranostay <matt.ranostay@konsulko.com>
Link: https://lore.kernel.org/r/20200910173242.621168-25-jic23@kernel.org
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This prevents use of this driver with ACPI via PRP0001 and is
an example of an anti pattern I'm trying to remove from IIO.
Hence drop from this driver.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200910173242.621168-24-jic23@kernel.org
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This prevents use of this driver with ACPI via PRP0001 and is
an example of an anti pattern I'm trying to remove from IIO.
Hence drop from this driver.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Manivannan Sadhasivam <manivannanece23@gmail.com>
Link: https://lore.kernel.org/r/20200910173242.621168-23-jic23@kernel.org
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This prevents use of this driver with ACPI via PRP0001 and is
an example of an anti pattern I'm trying to remove from IIO.
Hence drop from this driver.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Ludovic Tancerel <ludovic.tancerel@maplehightech.com>
Link: https://lore.kernel.org/r/20200910173242.621168-22-jic23@kernel.org
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This prevents use of this driver with ACPI via PRP0001 and is
an example of an anti pattern I'm trying to remove from IIO.
Hence drop from this driver.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Gregor Boirie <gregor.boirie@parrot.com>
Link: https://lore.kernel.org/r/20200910173242.621168-21-jic23@kernel.org
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This prevents use of this driver with ACPI via PRP0001 and is
an example of an anti pattern I'm trying to remove from IIO.
Hence drop from this driver.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Ludovic Tancerel <ludovic.tancerel@maplehightech.com>
Link: https://lore.kernel.org/r/20200910173242.621168-20-jic23@kernel.org
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These prevents use of this driver with ACPI via PRP0001 and are
an example of an anti pattern I'm trying to remove from IIO.
Hence drop them from this driver.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Tomasz Duszynski <tduszyns@gmail.com>
Link: https://lore.kernel.org/r/20200910173242.621168-19-jic23@kernel.org
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These prevents use of this driver with ACPI via PRP0001 and are
an example of an anti pattern I'm trying to remove from IIO.
Hence drop them from this driver.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
Link: https://lore.kernel.org/r/20200910173242.621168-18-jic23@kernel.org
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