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From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Boris Brezillon <boris.brezillon@bootlin.com>
Cc: Richard Weinberger <richard@nod.at>,
	linux-mtd@lists.infradead.org,
	David Woodhouse <dwmw2@infradead.org>,
	Brian Norris <computersforpeace@gmail.com>,
	Marek Vasut <marek.vasut@gmail.com>
Subject: Re: [PATCH] mtd: rawnand: sunxi: Handle the tREA > tRC / 2 case
Date: Tue, 15 Jan 2019 18:57:39 +0100	[thread overview]
Message-ID: <20190115185739.3dbad9c3@xps13> (raw)
In-Reply-To: <20181220141047.31733-1-boris.brezillon@bootlin.com>

Hi Boris,

Boris Brezillon <boris.brezillon@bootlin.com> wrote on Thu, 20 Dec 2018
15:10:47 +0100:

> In non-EDO, tREA should be less than tRP to guarantee that the
> controller does not sample the IO lines too early. Unfortunately, the
> sunxi NAND controller does not allow us to have different values for
> tRP and tREH (tRP = tREH = tRW / 2).
> 
> We have 2 options to overcome this limitation:
> 
> 1/ Extend tRC to fulfil the tREA <= tRC / 2 constraint
> 2/ Use EDO mode (only works if timings->tRLOH > 0)
> 
> Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
> ---

Applied to nand/next.


Thanks,
Miquèl

      reply	other threads:[~2019-01-15 17:57 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-20 14:10 [PATCH] mtd: rawnand: sunxi: Handle the tREA > tRC / 2 case Boris Brezillon
2019-01-15 17:57 ` Miquel Raynal [this message]

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