user/sven/linux.git/include/linux/iio, branch v6.15.1

iio: imu: adis: Add DIAG_STAT register

2025-02-22T12:23:49Z

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

2025-02-22T12:23:19Z

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

2025-02-22T12:22:45Z

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

iio: Drop iio_device_claim_direct_scoped() and related infrastructure

2025-02-17T13:04:09Z

Scoped conditional automated cleanup turned out to be harder to work with than expected. Despite several attempts to find a better solution non have surfaced. As such rip it out of the IIO code. Reviewed-by: David Lechner Reviewed-by: Nuno Sa Link: https://patch.msgid.link/20250209180624.701140-28-jic23@kernel.org Signed-off-by: Jonathan Cameron

iio: core: Rework claim and release of direct mode to work with sparse.

2025-02-17T12:57:13Z

Initial thought was to do something similar to __cond_lock() do_iio_device_claim_direct_mode(iio_dev) ? : ({ __acquire(iio_dev); 0; }) + Appropriate static inline iio_device_release_direct_mode() However with that, sparse generates false positives. E.g. drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c:1811:17: warning: context imbalance in 'st_lsm6dsx_read_raw' - unexpected unlock So instead, this patch rethinks the return type and makes it more 'conditional lock like' (which is part of what is going on under the hood anyway) and return a boolean - true for successfully acquired, false for did not acquire. To allow a migration path given the rework is now non trivial, take a leaf out of the naming of the conditional guard we currently have for IIO device direct mode and drop the _mode postfix from the new functions giving iio_device_claim_direct() and iio_device_release_direct() Whilst the kernel supports __cond_acquires() upstream sparse does not yet do so. Hence rely on sparse expanding a static inline wrapper to explicitly see whether __acquire() is called. Note that even with the solution here, sparse sometimes gives false positives. However in the few cases seen they were complex code structures that benefited from simplification anyway. Reviewed-by: David Lechner Reviewed-by: Nuno Sa Link: https://patch.msgid.link/20250209180624.701140-2-jic23@kernel.org Signed-off-by: Jonathan Cameron

iio: backend: add API for oversampling

2025-02-16T15:12:11Z

Add backend support for setting oversampling ratio. Reviewed-by: David Lechner Signed-off-by: Antoniu Miclaus Link: https://patch.msgid.link/20250214131955.31973-4-antoniu.miclaus@analog.com Signed-off-by: Jonathan Cameron

iio: backend: add support for data size set

2025-02-16T15:11:55Z

Add backend support for setting the data size used. This setting can be adjusted within the IP cores interfacing devices. Reviewed-by: Nuno Sa Reviewed-by: David Lechner Signed-off-by: Antoniu Miclaus Link: https://patch.msgid.link/20250214131955.31973-3-antoniu.miclaus@analog.com Signed-off-by: Jonathan Cameron

iio: backend: add API for interface get

2025-02-16T15:11:25Z

Add backend support for obtaining the interface type used. Reviewed-by: Nuno Sa Reviewed-by: David Lechner Signed-off-by: Antoniu Miclaus Link: https://patch.msgid.link/20250214131955.31973-2-antoniu.miclaus@analog.com Signed-off-by: Jonathan Cameron

iio: buffer-dmaengine: add devm_iio_dmaengine_buffer_setup_with_handle()

2025-02-10T18:47:49Z

Add a new devm_iio_dmaengine_buffer_setup_with_handle() function to handle cases where the DMA channel is managed by the caller rather than being requested and released by the iio_dmaengine module. Reviewed-by: Nuno Sa Signed-off-by: David Lechner Link: https://patch.msgid.link/20250207-dlech-mainline-spi-engine-offload-2-v8-9-e48a489be48c@baylibre.com Signed-off-by: Jonathan Cameron

iio: buffer-dmaengine: split requesting DMA channel from allocating buffer

2025-02-10T18:47:29Z

Refactor the IIO dmaengine buffer code to split requesting the DMA channel from allocating the buffer. We want to be able to add a new function where the IIO device driver manages the DMA channel, so these two actions need to be separate. To do this, calling dma_request_chan() is moved from iio_dmaengine_buffer_alloc() to iio_dmaengine_buffer_setup_ext(). A new __iio_dmaengine_buffer_setup_ext() helper function is added to simplify error unwinding and will also be used by a new function in a later patch. iio_dmaengine_buffer_free() now only frees the buffer and does not release the DMA channel. A new iio_dmaengine_buffer_teardown() function is added to unwind everything done in iio_dmaengine_buffer_setup_ext(). This keeps things more symmetrical with obvious pairs alloc/free and setup/teardown. Calling dma_get_slave_caps() in iio_dmaengine_buffer_alloc() is moved so that we can avoid any gotos for error unwinding. Reviewed-by: Nuno Sa Signed-off-by: David Lechner Link: https://patch.msgid.link/20250207-dlech-mainline-spi-engine-offload-2-v8-8-e48a489be48c@baylibre.com Signed-off-by: Jonathan Cameron