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spi: spi-zynqmp-gqspi: Add parallel memories support in GQSPI driver
During GQSPI driver probe set ctlr->multi-cs-cap for enabling multi CS capability of the controller. In parallel mode the controller can either split the data between both the flash or can send the same data to both the flashes, this is determined by the STRIPE bit. While sending commands to the flashes the GQSPI driver send the same command to both the flashes by resetting the STRIPE bit, but while writing/reading data to & from the flash the GQSPI driver splits the data evenly between both the flashes by setting the STRIPE bit. Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com> Link: https://lore.kernel.org/all/20230119185342.2093323-1-amit.kumar-mahapatra@amd.com/ State: waiting
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