spi: axi: Add bindings documentation for Analog Devices axi-spi-engine
Add the devicetree bindings documentation for the Analog Devices axi-spi-engine SPI master peripheral. This is a soft-peripheral used in FPGAs. The external interfaces of the peripheral are: * A memory mapped register map which is used to configure the peripheral. * One interrupt. * Two clocks, one for the memory mapped register interface and one for the SPI bus. * A SPI master interface to which the slave devices are connected. These interfaces are described by the devicetree bindings accordingly. Signed-off-by:Lars-Peter Clausen <lars@metafoo.de> Signed-off-by:
Mark Brown <broonie@kernel.org>
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