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SubjectRe: [PATCH v2] mtd: rawnand: denali: add more delays before latching incoming data
On Mon, Jul 05, 2021 at 01:00:43AM +0900, Masahiro Yamada wrote:
>
>I no longer have any hardware to test this driver.
>
>If you increase data_setup_on_host (the current value is 10000),
>will it solve your issue?

Yes, it does seem to work with this value increased to 10001.

Looking more closely, I compared timing parameters in struct
denali_chip_sel, for the kernel 5.4 (which works), for 5.10 (which
fails), and also for 5.10 with data_setup_host=10001 (which works).

5.4 5.10 5.10+10001
acc_clks 2 3 4
rdwr_en_lo_cnt 3 2 3
cs_setup_cnt 1 0 0

So it seems that on my hardware, rdwr_en_lo_cnt must be >= 3.

Regards,
Ralph

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