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Ye Li authored
Add fsl_fspi driver for flexspi controller. This driver supports: 1. DDR Quad output 2. Prefetch function for improve read performance. 3. Fast read and Quad read for one line read mode. 4. Read flash FSR register. 5. DM. Signed-off-by: Han Xu <han.xu@nxp.com> Signed-off-by: Ye Li <ye.li@nxp.com>
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