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GL9763E enters ASPM L1 state after a very short idle in default, even during a burst of request. So the R/W performance of GL9763E is low with some platforms, which support ASPM mechanism, due to entering ASPM L1 state very frequently in R/W process. Set the L1 entry delay bits in vendor-specific register to 0x3FF to enlarge the idle period to 260us for improving the R/W performance of GL9763E. Signed-off-by: Renius Chen <reniuschengl@gmail.com> Link: https://lore.kernel.org/r/20210115054736.27769-1-reniuschengl@gmail.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>