v1: https://lore.kernel.org/linux-iio/20231204144925.4fe9922f@jic23-huawei/T/#m222f5175273b81dbfe40b7f0daffcdc67d6cb8ff v2: https://lore.kernel.org/r/20231208-dev-iio-backend-v2-0-5450951895e1@xxxxxxxxxx v3: https://lore.kernel.org/linux-iio/20231213-dev-iio-backend-v3-0-bb9f12a5c6dc@xxxxxxxxxx/ Changes in v4: - Patch 1: * Don't make io-backends mandatory. - Patch 5: * Add helper __devm_iio_backend_get(); * Add new devm_iio_backend_get_optional(); * Add new devm_iio_backend_get_from_fwnode_lookup(); * Convert all dev_ logs to plain pr_ logs so we actually use pr_fmt. - Patch 6: * Implement the fallback backend lookput in case devm_iio_backend_get_optional() fails; So the main difference in this series is to still handle 'adi,adc-dev' in case 'io-backends' is not given. Hence we don't need to make it mandatory and break dt ABI for the ad9467 bindings. Rob, it would be nice if you can take a quick a look on it and let me know if there's a more efficient way of doing things. Rob also already expressed that he is ok with the dt ABI breakage as long as it is properly justified in the commit message. Jonathan, we should see if we keep things as in this version or rollback. Personally I'm not that "happy" with that devm_iio_backend_get_from_fwnode_lookup() given the fact that is not really supposed to be used anymore. OTOH, it's small and simple... So, let me know your preference and I'll go with that :). This is likely the last version of this series for this year. If things go well, I plan to start working on the second user of the framework right in the beginning of the next year... Keeping the block diagram in v3's cover so we don't have to follow links to check one of the typical setups. ------------------------------------------------------- ------------------ | ----------- ------------ ------- FPGA | | ADC |------------------------| | AXI ADC |---------| DMA CORE |------| RAM | | | (Frontend/IIO) | Serial Data (eg: LVDS) | |(backend)|---------| |------| | | | |------------------------| ----------- ------------ ------- | ------------------ ------------------------------------------------------- --- Nuno Sa (7): dt-bindings: adc: ad9467: add new io-backend property dt-bindings: adc: axi-adc: deprecate 'adi,adc-dev' driver: core: allow modifying device_links flags iio: buffer-dmaengine: export buffer alloc and free functions iio: add the IIO backend framework iio: adc: ad9467: convert to backend framework iio: adc: adi-axi-adc: move to backend framework Olivier Moysan (1): of: property: add device link support for io-backends .../devicetree/bindings/iio/adc/adi,ad9467.yaml | 4 + .../devicetree/bindings/iio/adc/adi,axi-adc.yaml | 4 +- MAINTAINERS | 8 + drivers/base/core.c | 14 +- drivers/iio/Kconfig | 5 + drivers/iio/Makefile | 1 + drivers/iio/adc/Kconfig | 4 +- drivers/iio/adc/ad9467.c | 282 ++++++++----- drivers/iio/adc/adi-axi-adc.c | 381 +++++------------ drivers/iio/buffer/industrialio-buffer-dmaengine.c | 8 +- drivers/iio/industrialio-backend.c | 456 +++++++++++++++++++++ drivers/of/property.c | 2 + include/linux/iio/adc/adi-axi-adc.h | 68 --- include/linux/iio/backend.h | 75 ++++ include/linux/iio/buffer-dmaengine.h | 3 + 15 files changed, 845 insertions(+), 470 deletions(-) --- base-commit: 2dfef50589aef3b9a2fa2190ae95b328fb664f89 change-id: 20231219-iio-backend-a3dc1a6a7a58 -- Thanks! - Nuno Sá
