From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Christophe Kerello <christophe.kerello@st.com>,
miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com
Cc: linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org,
linux-stm32@st-md-mailman.stormreply.com
Subject: Re: mtd: rawnand: stm32_fmc2: avoid to lock the CPU bus
Date: Thu, 9 Jan 2020 20:15:10 +0100 [thread overview]
Message-ID: <20200109191510.10963-1-miquel.raynal@bootlin.com> (raw)
In-Reply-To: <1576486915-7517-1-git-send-email-christophe.kerello@st.com>
On Mon, 2019-12-16 at 09:01:55 UTC, Christophe Kerello wrote:
> We are currently using nand_soft_waitrdy to poll the status of the NAND
> flash. FMC2 enables the wait feature bit (this feature is mandatory for
> the sequencer mode). By enabling this feature, we can't poll the status
> of the NAND flash, the read status command is stucked in FMC2 pipeline
> until R/B# signal is high, and locks the CPU bus.
> To avoid to lock the CPU bus, we poll FMC2 ISR register. This register
> reports the status of the R/B# signal.
>
> Fixes: 2cd457f328c1 ("mtd: rawnand: stm32_fmc2: add STM32 FMC2 NAND flash controller driver")
> Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git mtd/fixes, thanks.
Miquel
prev parent reply other threads:[~2020-01-09 19:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-16 9:01 Christophe Kerello
2020-01-09 19:15 ` Miquel Raynal [this message]
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