drivers/spi: Add support for the quad enhanced mode - #7587
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…ced mode The DW SSI enhanced frame format sends the data of a memory operation over four lanes instead of one and the address as well where the flash supports it, so the data transfers roughly four times faster. The capability is detected on each controller and used whenever the device tree and the flash both allow quad. Signed-off-by: Marta Momotko <marta.momotko@raspberrypi.com>
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The DW SSI enhanced frame format sends the data of a memory operation over four lanes instead of one and the address as well where the flash supports it, so the data transfers roughly four times faster. The capability is detected on each controller and used whenever the device tree and the flash both allow quad.