linux-toradex.git/include/linux/iio, branch v6.16-rc6

iio: introduce IIO_DECLARE_BUFFER_WITH_TS macros

2025-05-21T13:20:31+00:00

Add new macros to help with the common case of declaring a buffer that
is safe to use with iio_push_to_buffers_with_ts(). This is not trivial
to do correctly because of the alignment requirements of the timestamp.
This will make it easier for both authors and reviewers.

To avoid double __align() attributes in cases where we also need DMA
alignment, add a 2nd variant IIO_DECLARE_DMA_BUFFER_WITH_TS().

Reviewed-by: Nuno Sá 
Signed-off-by: David Lechner 
Link: https://patch.msgid.link/20250507-iio-introduce-iio_declare_buffer_with_ts-v6-2-4aee1b9f1b89@baylibre.com
Signed-off-by: Jonathan Cameron

iio: make IIO_DMA_MINALIGN minimum of 8 bytes

2025-05-21T13:20:31+00:00

Add a condition to ensure that IIO_DMA_MINALIGN is at least 8 bytes.
On some 32-bit architectures, IIO_DMA_MINALIGN is 4. In many cases,
drivers are using this alignment for buffers that include a 64-bit
timestamp that is used with iio_push_to_buffers_with_ts(), which expects
the timestamp to be aligned to 8 bytes. To handle this, we can just make
IIO_DMA_MINALIGN at least 8 bytes.

Reviewed-by: Nuno Sá 
Signed-off-by: David Lechner 
Link: https://patch.msgid.link/20250507-iio-introduce-iio_declare_buffer_with_ts-v6-1-4aee1b9f1b89@baylibre.com
Signed-off-by: Jonathan Cameron

iio: introduced iio_push_to_buffers_with_ts() that takes a data_total_len argument.

2025-05-21T13:20:25+00:00

Check that data_total_len argument against iio_dev->scan_bytes.

The size needs to be at least as big as the scan. It can be larger,
which is typical if only part of fixed sized storage is used due to
a subset of channels being enabled.

Reviewed-by: Nuno Sá 
Reviewed-by: David Lechner 
Link: https://patch.msgid.link/20250413103443.2420727-6-jic23@kernel.org
Signed-off-by: Jonathan Cameron

iio: backend: add support for data source get

2025-04-22T18:10:03+00:00

Add backend support for getting the data source used.

The ad3552r HDL implements an internal ramp generator, so adding the
getter to allow data source get/set by debugfs.

Reviewed-by: Nuno Sá 
Signed-off-by: Angelo Dureghello 
Link: https://patch.msgid.link/20250409-wip-bl-ad3552r-fixes-v5-3-fb429c3a6515@baylibre.com
Signed-off-by: Jonathan Cameron

iio: Adjust internals of handling of direct mode claiming to suit new API.

2025-04-22T18:10:01+00:00

Now there are no remaining callers of iio_device_claim_direct_mode()
and iio_device_release_direct_mode() rename those functions to ensure
they are not used in new drivers. Also make them now return booleans
in line with the sparse friendly static inline wrappers.

Reviewed-by: David Lechner 
Reviewed-by: Marcelo Schmitt 
Link: https://patch.msgid.link/20250331121317.1694135-38-jic23@kernel.org
Signed-off-by: Jonathan Cameron

iio: trigger: stm32-lptimer: add support for stm32mp25

2025-04-22T18:09:54+00:00

Add support for STM32MP25 SoC. Use newly introduced compatible to handle
this new HW variant. Add new trigger definitions that can be used by the
stm32 analog-to-digital converter. Use compatible data to identify them.

Signed-off-by: Olivier Moysan 
Signed-off-by: Fabrice Gasnier 
Link: https://patch.msgid.link/20250314171451.3497789-4-fabrice.gasnier@foss.st.com
Signed-off-by: Jonathan Cameron

iio: adc: add helpers for parsing ADC nodes

2025-04-22T18:09:52+00:00

There are ADC ICs which may have some of the AIN pins usable for other
functions. These ICs may have some of the AIN pins wired so that they
should not be used for ADC.

A common way of marking pins that can be used as ADC inputs is to add
corresponding channel@N nodes in the device tree as described in the ADC
	      binding yaml.

Add couple of helper functions which can be used to retrieve the channel
information from the device node.

Signed-off-by: Matti Vaittinen 
Reviewed-by: Andy Shevchenko 
Reviewed-by: Marcelo Schmitt 
Link: https://patch.msgid.link/f1d8b3e15237947738912c0d297b3e1e21d8b03e.1742560649.git.mazziesaccount@gmail.com
Signed-off-by: Jonathan Cameron

iio: imu: adis: Add DIAG_STAT register

2025-02-22T12:23:49+00:00

Some devices may have more than 16 bits of status. This patch allows the
user to specify the size of the DIAG_STAT register. It defaults to 2 if
not specified. This is mainly for backward compatibility.

Co-developed-by: Ramona Gradinariu 
Signed-off-by: Ramona Gradinariu 
Co-developed-by: Antoniu Miclaus 
Signed-off-by: Antoniu Miclaus 
Co-developed-by: Nuno Sá 
Signed-off-by: Nuno Sá 
Signed-off-by: Robert Budai 
Link: https://patch.msgid.link/20250217105753.605465-4-robert.budai@analog.com
Signed-off-by: Jonathan Cameron

iio: imu: adis: Add reset to custom ops

2025-02-22T12:23:19+00:00

This patch allows the custom definition of reset functionality for adis object.
It is useful in cases where the driver does not need to sleep after the reset
since it is handled by the library.

Co-developed-by: Ramona Gradinariu 
Signed-off-by: Ramona Gradinariu 
Co-developed-by: Antoniu Miclaus 
Signed-off-by: Antoniu Miclaus 
Co-developed-by: Nuno Sá 
Signed-off-by: Nuno Sá 
Signed-off-by: Robert Budai 
Link: https://patch.msgid.link/20250217105753.605465-3-robert.budai@analog.com
Signed-off-by: Jonathan Cameron

iio: imu: adis: Add custom ops struct

2025-02-22T12:22:45+00:00

This patch introduces a custom ops struct letting users define custom read and
write functions. Some adis devices might define a completely different spi
protocol from the one used in the default implementation.

Co-developed-by: Ramona Gradinariu 
Signed-off-by: Ramona Gradinariu 
Co-developed-by: Antoniu Miclaus 
Signed-off-by: Antoniu Miclaus 
Co-developed-by: Nuno Sá 
Signed-off-by: Nuno Sá 
Signed-off-by: Robert Budai 
Link: https://patch.msgid.link/20250217105753.605465-2-robert.budai@analog.com
Signed-off-by: Jonathan Cameron