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The default way of accessing nand device is using the nand width. This means that 8bit devices are using u8 * and 16bit devices are accessed using u16 *. This results in a non-optimal performance since the FSMC is designed to translate the normal word accesses into device width based accesses. This patch implements read_buf and write_buf callbacks using word by word accesses. Signed-off-by: Vipin Kumar <[email protected]> Reviewed-by: Viresh Kumar <[email protected]> Signed-off-by: Artem Bityutskiy <[email protected]> Signed-off-by: David Woodhouse <[email protected]>