Channel 6 of the SAR ADC can be switched between two inputs:
SAR_ADC_CH6 input (an actual pad on the SoC) and the signal from the
temperature sensor inside the SoC.
To get usable results from the temperature sensor we need to read the
corresponding calibration data from the eFuse and pass it to the SAR ADC
registers. If the temperature sensor is not calibrated (the eFuse data
contains a bit for this) then the driver will only register the
iio_chan_spec's for voltage measurements.
This only enables the temperature sensor for the Meson8 SoC. Meson8b and
Meson8m2 SoCs can be supported in the future as well but we first need
a way to pass the fifth TSC (temperature sensor coefficient) bit to the
HHI register area (apart from that the infrastructure as already
implemented for Meson8 can be used). On the 64-bit SoCs (GXBB, GXL and
GXM) the temperature sensor inside SAR ADC is firmware-controlled (by
BL30, we can simply use the SCPI hwmon driver to get the chip
temperature).
To keep the devicetree interface backwards compatible we simply skip the
temperature sensor initialization if no eFuse nvmem cell is passed via
devicetree.
The public documentation for the SAR ADC IP block does not explain how
to use the registers to read the temperature. The logic from this patch
is based on reading and understanding Amlogic's GPL kernel sources.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
The 32-bit Meson8 SoC can use the SAR ADC to read the chip temperature.
This requires setting the correct TSC (temperature sensor coefficient),
which is programmed into the eFuse during the manufacturing process.
Meson8b and Meson8m2 are not supported yet because they have a 5-bit TSC
and only the first four bits are stored inside the SAR ADC registers.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This patch adds a channel type check at the beginning of the
ad2s90_read_raw function. Since ad2s90 has only one channel, it just
checks if the given channel is the expected one and if not, return
-EINVAL.
Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This patch adds the IIO_CHAN_INFO_SCALE mask to ad2s90_chan and
implements the relative read behavior at ad2s90_read_raw.
Signed-off-by: Victor Colombo <victorcolombo@gmail.com>
Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Previously, devm_iio_device_register was being called before the
spi_setup call and the spi_device's max_speed_hz and mode assignments.
This could lead to a race condition since the driver was still being
set up after it was already made ready to use. To fix it, this patch
moves the device registration to the end of ad2s90_probe.
Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This patch removes an initial assignment to the variable ret at probe,
that was always overwritten.
Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Previously, ad2s90_probe ignored the return code from spi_setup, not
handling its possible failure. This patch makes ad2s90_probe check if
the code is an error code and, if so, do the following:
- Call dev_err with an appropriate error message.
- Return the spi_setup's error code.
Note: The 'return ret' statement could be out of the 'if' block, but
this whole block will be moved up in the function in the patch:
'staging:iio:ad2s90: Move device registration to the end of probe'.
Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Previously, when spi_read returned an error code inside ad2s90_read_raw,
the code was ignored and IIO_VAL_INT was returned. This patch makes the
function return the error code returned by spi_read when it fails.
Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Variable val subtracted an uninitialized value on IIO_CHAN_INFO_OFFSET.
This was fixed by assigning the correct value instead.
Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>
Acked-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Add device tree table for matching vendor ID.
Note that as the driver is still heavily in flux and there are some
non obvious aspects to a comprehensive binding, that binding will
be submitted at a later date (before leaving staging!)
Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Drop gpioin flag which decides how the GPIOs
are controlled as the GPIOs must be outputs
for the host as per the datasheet.
Removes need for platform data so that is dropped as well.
Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Use the gpiod interface instead of the deprecated old non-descriptor
interface.
Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Report the step range of the respective potentiometers that are
possible to userspace.
Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Description how to invoke ti-dac7311 driver from device tree file.
Signed-off-by: Charles-Antoine Couret <charles-antoine.couret@essensium.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
It is a driver for Texas Instruments 8/10/12-bit 1-channel
compatible with DAC6311 and DAC5311 chips.
Datasheet of this chip:
http://www.ti.com/lit/ds/symlink/dac7311.pdf
Signed-off-by: Charles-Antoine Couret <charles-antoine.couret@essensium.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Add DT binding documentation for the LSM9DS1 magnetometer.
Signed-off-by: Martin Kelly <martin@martingkelly.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
The type promotion will kick in, so the comparison will work.
Signed-off-by: Slawomir Stepien <sst@poczta.fm>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
LIS3MDL and LSM9DS1 are missing BDU settings in their register maps, so add
them. I don't have a LIS3MDL sensor to test, but this works correctly on
the LSM9DS1, which has the same register map.
Signed-off-by: Martin Kelly <martin@martingkelly.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Update the sensor settings to support the LSM9DS1 sensor. Although the
LSM9DS1 accelerometer and gyroscope are coupled together to use the same
FIFO, the magnetometer is separate and can be cleanly supported without
refactoring the existing driver.
Signed-off-by: Martin Kelly <martin@martingkelly.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Add a comment clarifying better when to use <device_name> vs
<device_name>-magn in compatibility strings.
Signed-off-by: Martin Kelly <martin@martingkelly.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
More concise to have a pointer to tpl0102_cfg struct in the iio_priv
data than an integer to an index of an array.
Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>
Reviewed-by: Slawomir Stepien <sst@poczta.fm>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Remove unmatched right bracket. Reported by uncrustify.
Signed-off-by: Ioannis Valasakis <code@wizofe.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove two instances of a comparison to BOOL.
Reported by coccinelle.
Signed-off-by: Ioannis Valasakis <code@wizofe.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove extra spaces before the tab character inside a comment section.
Reported by checkpatch.
Signed-off-by: Ioannis Valasakis <code@wizofe.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add extra spaces around the OR operator.
Reported by checkpatch.
Signed-off-by: Ioannis Valasakis <code@wizofe.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove extra blank lines to conform with coding style.
Reported by checkpatch.
Signed-off-by: Ioannis Valasakis <code@wizofe.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove extra space before a tab character.
Reported by checkpatch.
Signed-off-by: Ioannis Valasakis <code@wizofe.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Replace SPDX License Identifier comments with C comments.
Reported by checkpatch.
Signed-off-by: Ioannis Valasakis <code@wizofe.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Align arguments with the right side of the open left parentheses.
Reported by checkpatch.
Signed-off-by: Ioannis Valasakis <code@wizofe.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Replace the SPDX identifier with standard C comment.
Reported by checkpatch.
Signed-off-by: Ioannis Valasakis <code@wizofe.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Align parameters to the right side of the left parentheses
Reported by checkpatch.
Signed-off-by: Ioannis Valasakis <code@wizofe.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Shorten pointer NULL check by simple truth test.
Reported by checkpatch.
Signed-off-by: Ioannis Valasakis <code@wizofe.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
It needs an explicit LZ4 library dependency
if lz4 compression is enabled, found by kbuild randconfig.
Reported-by: kbuild test robot <lkp@intel.com>
Fixes: 05f9d4a0c8 ("staging: erofs: use the new LZ4_decompress_safe_partial()")
Signed-off-by: Gao Xiang <hsiangkao@aol.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Heap statistics have been removed and currently even basics statistics
are missing.
This patch creates per heap debugfs directory /sys/kernel/debug/<heap_name>
and adds the following counters:
- the number of allocated buffers;
- the number of allocated bytes;
- the number of allocated bytes watermark.
Signed-off-by: Alexey Skidanov <alexey.skidanov@intel.com>
Acked-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add spaces before and after text in comments.
Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove a comment that does not contain any text.
Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Edit statements so that the line does not end with an assignment operator
or a parenthesis.
Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reformat lines over 80 characters in prism2mib.c to resolve "line over
80 characters" warnings reported by checkpatch.
Signed-off-by: Tim Collier <osdevtc@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Resolve "line over 80 characters" warning reported by checkpatch by
splitting function header over 2 lines.
Signed-off-by: Tim Collier <osdevtc@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fixed sparse tool warnings due to missing convesion from
le16 to cpu endienness.
Signed-off-by: Carmeli Tamir <carmeli.tamir@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Since in nbu2ss_drv_probe() p_regs is assigned from mmio_base, which is
marked as __iomem, p_regs also should be market with __iomem.
Signed-off-by: Carmeli Tamir <carmeli.tamir@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Added static modifier to the udc_controller, since it's only
required within emxx_udc.c.
Signed-off-by: Carmeli Tamir <carmeli.tamir@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use the gpiod interface instead of the deprecated old non-descriptor
interface in olpc_dcon_xo_1.c.
Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When the BCM2835 audio output is used, userspace sees a jitter up to 10ms
in the audio position, aka "delay" -- the number of frames that must
be output before a new frame would be played.
Make this a bit nicer for userspace by interpolating the position
using the CPU clock.
The overhead is small -- an extra ktime_get() every time a GPU message
is sent -- and another call and a few calculations whenever the delay
is sought from userland.
At 48,000 frames per second, i.e. approximately 20 microseconds per
frame, it would take a clock inaccuracy of
20 microseconds in 10 milliseconds -- 2,000 parts per million --
to result in an inaccurate estimate, whereas
crystal- or resonator-based clocks typically have an
inaccuracy of 10s to 100s of parts per million.
Signed-off-by: Mike Brady <mikebrady@eircom.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
handle_cfg_param() receives a bit map that describes what to be changed.
Some of these bits flags aren't referred to from elsewhere and can be
removed.
Signed-off-by: Adham Abozaeid <adham.abozaeid@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
LZ4_decompress_safe_partial() can now decode exactly the nb of bytes
requested after the upstreamed commit 2209fda323 ("lib/lz4: update LZ4
decompressor module"), remove the erofs hacked lz4 decompression code.
A more cleaned compressor wrapper will be introduced in the subsequent
patches in order to prepare for supporting multiple compression algorithms.
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The frame.flags & FLAG_B_FRAME is promoted to a long unsigned because
of the use of the BIT() macro when defining FLAG_B_FRAME and causing a
build warning. Fix this by using the %lu format specifer.
Cleans up warning:
drivers/staging/media/tegra-vde/tegra-vde.c:267:5: warning: format
specifies type 'int' but the argument has type 'unsigned long' [-Wformat]
Fixes: 42e764d057 ("staging: tegravde: replace bit assignment with macro")
Cc: Ioannis Valasakis <code@wizofe.uk>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
