fsl_dspi: Introduce DT bindings for CS-SCK and SCK-CS delays
Communication with some SPI slaves just won't cut it if these delays (before the beginning, and after the end of a transfer) are not added to the Chip Select signal. These are a straight copy from Linux: Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt drivers/spi/spi-fsl-dspi.c Signed-off-by: NVladimir Oltean <vladimir.oltean@nxp.com> [Rebased] Signed-off-by: NPriyanka Jain <priyanka.jain@nxp.com>
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