kernel.git/drivers/iio/buffer/industrialio-buffer-dmaengine.c, branch linux-5.12.y

iio: buffer: dmaengine: unwrap the use of iio_buffer_set_attrs()

2020-11-21T14:52:57Z

The iio_buffer_set_attrs() helper will be removed in this series. So, just assign the attributes of the DMAEngine buffer logic directly. This is IIO buffer core context, so there is direct access to the buffer->attrs object. Signed-off-by: Alexandru Ardelean Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20200929125949.69934-2-alexandru.ardelean@analog.com Signed-off-by: Jonathan Cameron

iio: buffer-dmaengine: remove non managed alloc/free

2020-09-29T16:27:06Z

This is to encourage the use of devm_iio_dmaengine_buffer_alloc(). Currently the managed version of the DMAEngine buffer alloc is the only function used from this part of the framework. Signed-off-by: Alexandru Ardelean Link: https://lore.kernel.org/r/20200923121810.944075-1-alexandru.ardelean@analog.com Signed-off-by: Jonathan Cameron

iio: buffer-dmaengine: adjust `bytes_used` with residue info

2020-09-03T18:40:58Z

A transfer may fall shorter than the bytes in the block. This information is available in the residue from the DMA engine, so we can compute actual `bytes_used` with that by subtracting the residue. Signed-off-by: Alexandru Ardelean Signed-off-by: Lars-Peter Clausen Link: https://lore.kernel.org/r/20200826052011.13348-1-lars@metafoo.de Signed-off-by: Jonathan Cameron

iio: buffer-dmaengine: add dev-managed calls for buffer alloc

2020-04-19T15:56:22Z

Currently, when using a 'iio_dmaengine_buffer_alloc()', an matching call to 'iio_dmaengine_buffer_free()' must be made. With this change, this can be avoided by using 'devm_iio_dmaengine_buffer_alloc()'. The buffer will get free'd via the device's devres handling. Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron

iio: buffer-dmaengine: use %zu specifier for sprintf(align)

2020-04-19T15:56:21Z

The 'size_t' type behaves differently on 64-bit architectures, and causes compiler a warning of the sort "format '%u' expects argument of type 'unsigned int', but argument 3 has type 'size_t {aka long unsigned int}'". This change adds the correct specifier for the 'align' field. Fixes: 4538c18568099 ("iio: buffer-dmaengine: Report buffer length requirements") Reported-by: kbuild test robot Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron

iio: buffer: rename 'read_first_n' callback to 'read'

2019-12-29T15:20:09Z

It is implied that 'read' will read the first n bytes and not e.g. bytes only from offsets within the buffer that are a prime number. This change is non-functional, mostly just a rename. A secondary intent with this patch is to make room later to add a write callback. Signed-off-by: Lars-Peter Clausen Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron

iio: buffer-dmaengine: Report buffer length requirements

2019-12-29T15:20:09Z

The dmaengine buffer has some length alignment requirements that can differ from platform to platform. If the length alignment requirements are not met unexpected behavior like dropping of samples can occur. Currently these requirements are not reported and applications need to know the requirements of the platform by some out-of-band means. Add a new buffer attribute that reports the length alignment requirements called `length_align_bytes`. The reported length alignment is in bytes that means the buffer length alignment in sample sets depends on the number of enabled channels and the bytes per channel. Applications using this attribute to determine the buffer size requirements need to consider this. Signed-off-by: Lars-Peter Clausen Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron

iio: buffer-dmaengine: Add module information

2019-12-29T15:20:08Z

Make sure that the industrialio-buffer-dmaengine has proper license information so it can be build as a module and loaded without tainting the kernel. Signed-off-by: Lars-Peter Clausen Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron

iio: buffer-dmaengine: Use dma_request_chan() directly for channel request

2019-11-16T16:21:56Z

dma_request_slave_channel_reason() is: dma_request_chan(dev, name) Signed-off-by: Peter Ujfalusi Reviewed-by: Vinod Koul Signed-off-by: Jonathan Cameron

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 149

2019-05-30T18:25:18Z

Based on 1 normalized pattern(s): licensed under the gpl 2 or later extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 82 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Kate Stewart Reviewed-by: Richard Fontana Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190524100845.150836982@linutronix.de Signed-off-by: Greg Kroah-Hartman