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2020-06-16spi: add Renesas RPC-IF driverSergei Shtylyov1-0/+216
Add the SPI driver for the Renesas RPC-IF. It's the "front end" driver using the "back end" APIs in the main driver to talk to the real hardware. We only implement the 'spi-mem' interface -- there's no need to implement the usual SPI driver methods... Based on the original patch by Mason Yang <[email protected]>. Signed-off-by: Sergei Shtylyov <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>