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mtd: nand: sunxi: fix EDO mode selection
The ONFI spec says that EDO should be enabled if the host drives tRC less than 30ns, but the code just tests for the tRC_min value extracted from the timings exposed by the NAND chip not the timings actually configured in the NAND controller. Fix that by first rounding down the requested clk_rate with clk_round_rate() and then checking if tRC is actually smaller than 30ns. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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