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Unverified Commit fae7b3c3 authored by Naga Sureshkumar Relli's avatar Naga Sureshkumar Relli Committed by Mark Brown
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spi: spi-zynqmp-gqspi: Add tap delay support for ZynqMP GQSPI Controller



GQSPI controller uses the internal clock for loopback mode. The loopback
mode is used with the high-speed Quad SPI timing mode, where the memory
interface clock needs to be greater than 40 MHz. Based on the tap delay
value programmed, the internal clock is delayed and used for capturing
the data.
Based upon the frequency of operation set the recommended tap delay
values in GQSPI driver.

Signed-off-by: default avatarNaga Sureshkumar Relli <nagasure@xilinx.com>
Signed-off-by: default avatarMichal Simek <michal.simek@amd.com>
Signed-off-by: default avatarAmit Kumar Mahapatra <amit.kumar-mahapatra@amd.com>
Link: https://lore.kernel.org/r/20221011062040.12116-6-amit.kumar-mahapatra@amd.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 1e400cb9
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