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u-boot/drivers
Pratyush Yadav bd8c8dcd4d spi: cadence-qspi: Do not calibrate when device tree sets read delay
If the device tree provides a read delay value, use that directly and do
not perform the calibration procedure.

This allows the device tree to over-ride the read delay value in cases
where the read delay value obtained via calibration is incorrect. One
such example is the Cypress Semper flash. It needs a read delay of 4 in
octal DTR mode. But since the calibration procedure is run before the
flash is switched in octal DTR mode, it yields a read delay of 2. A
value of 4 works for both octal DTR and legacy modes.

Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
2021-06-28 11:56:53 +05:30
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