spi: axi-spi-engine: implement offload support

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Implement SPI offload support for the AXI SPI Engine. Currently, the
hardware only supports triggering offload transfers with a hardware
trigger so attempting to use an offload message in the regular SPI
message queue will fail. Also, only allows streaming rx data to an
external sink, so attempts to use a rx_buf in the offload message will
fail.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20250207-dlech-mainline-spi-engine-offload-2-v8-7-e48a489be48c@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>

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David Lechner 2025-02-07 14:09:04 -06:00 • committed by Mark Brown

parent e1101373df

commit 5a19e1985d

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1

drivers/spi/Kconfig

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315

drivers/spi/spi-axi-spi-engine.c

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