From: Ralph Siemsen <ralph.siemsen@linaro.org>
To: Masahiro Yamada <masahiroy@kernel.org>
Cc: linux-mtd <linux-mtd@lists.infradead.org>,
Marek Vasut <marex@denx.de>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2] mtd: rawnand: denali: add more delays before latching incoming data
Date: Mon, 5 Jul 2021 10:48:23 -0400 [thread overview]
Message-ID: <20210705144823.GA1459782@maple.netwinder.org> (raw)
In-Reply-To: <CAK7LNASvYVyEQ4M_zEUdw9K9AB-RVErKoqFMQZ5OSKJF0AoBww@mail.gmail.com>
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
prev parent reply other threads:[~2021-07-05 14:48 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-17 7:18 [PATCH v2] mtd: rawnand: denali: add more delays before latching incoming data Masahiro Yamada
2020-04-22 15:29 ` Marek Vasut
2020-04-22 15:36 ` Miquel Raynal
2020-04-22 15:37 ` Marek Vasut
2020-05-10 20:06 ` Miquel Raynal
2021-06-30 18:47 ` Ralph Siemsen
2021-07-04 16:00 ` Masahiro Yamada
2021-07-05 14:48 ` Ralph Siemsen [this message]
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