Hi!
I just found an issue with
commit 586a2c52909df453ed1b6239283744b0851ccf81
Author: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
Date: Fri Sep 22 12:46:41 2017 +0900
mtd: nand: denali: squash denali_enable_dma() helper into
caller
on (atleast) Cyclone5 SoCFPGAs.
With this patch I get
[ 0.543088] denali-nand-dt ff900000.nand: necessary clock
is missing. default clock rates are used.
[ 0.554325] nand: device found, Manufacturer ID: 0x2c, Chip
ID: 0xda
[ 0.560654] nand: Micron MT29F2G08ABAEAWP
[ 0.564680] nand: 256 MiB, SLC, erase size: 128 KiB, page
size: 2048, OOB size: 64
[ 0.971317] nand: timeout while waiting for chip to become
ready
[ 1.991336] denali-nand-dt ff900000.nand: timeout while
waiting for irq 0x4
and then the system just reboots. Adding the ioread32 back or just
some printks fixes this. So there seems to be a timing issue.
What would be the preferred solution? Add a
msleep($IDONTKNOWWHATISAGOODVALUE) although it is unnecessary for
the other SoCs?
Bringing the ioread32 back seems like obfuscating the problem.
Best regards,
Steffen
--
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