From: Stefan Agner <stefan@agner.ch>
To: Boris Brezillon <boris.brezillon@bootlin.com>
Cc: Benjamin Lindqvist <benjamin.lindqvist@endian.se>,
dwmw2@infradead.org, computersforpeace@gmail.com,
marek.vasut@gmail.com, robh+dt@kernel.org, mark.rutland@arm.com,
thierry.reding@gmail.com, mturquette@baylibre.com,
sboyd@kernel.org, Lucas Stach <dev@lynxeye.de>,
miquel.raynal@bootlin.com, richard@nod.at, marcel@ziswiler.com,
krzk@kernel.org, digetx@gmail.com, jonathanh@nvidia.com,
pdeschrijver@nvidia.com, pgaikwad@nvidia.com,
Mirza Krak <mirza.krak@gmail.com>,
linux-mtd@lists.infradead.org, linux-tegra@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-clk@vger.kernel.org
Subject: Re: [RESEND PATCH 2/5] mtd: rawnand: add NVIDIA Tegra NAND Flash controller driver
Date: Thu, 24 May 2018 14:19:18 +0200 [thread overview]
Message-ID: <146a3abbbff4dcef30ad662a0fb85ff1@agner.ch> (raw)
In-Reply-To: <20180524135335.6aa0b7a4@bbrezillon>
On 24.05.2018 13:53, Boris Brezillon wrote:
> Hi Benjamin,
>
> On Thu, 24 May 2018 13:30:14 +0200
> Benjamin Lindqvist <benjamin.lindqvist@endian.se> wrote:
>
>> Hi Stefan,
>>
>> It seems to me that a probe similar to what the BootROM does shouldn't
>> be awfully complicated to implement - just cycle through the switch
>> cases in case of an ECC error. But I guess that's more of an idea for
>> further improvements rather than a comment to the patch set under
>> review.
>
> Nope, not really an option, because you're not guaranteed that the NAND
> will be used as a boot media, and the first page or first set of pages
> might just be erased.
>
Yeah I did not meant probing like the Boot ROM does.
What I meant was using only the ECC modes which are supported by the
Boot ROM when the driver tries to choose a viable mode. So that would
be:
- RS t=4
- BCH t=8
- BCH t=16
Maybe we could add a property to enable that behavior:
tegra,use-bootable-ecc-only;
>>
>> However, I think that allowing for an override of the oobsize
>> inference would be a good idea before merging, no? This could just be
>> a trivial #ifdef (at least temporarily). If you agree but don't feel
>> like doing it yourself, I'd be happy to pitch in. Let me know.
>
> That's why we have nand-ecc-xxx properties in the DT.
>
Yes, nand-ecc-strength is the first thing I plan to implement, that way
strength can be defined in dt.
--
Stefan
next prev parent reply other threads:[~2018-05-24 12:19 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-22 12:07 [RESEND PATCH 0/5] mtd: rawnand: add NVIDIA Tegra NAND flash support Stefan Agner
2018-05-22 12:07 ` [RESEND PATCH 1/5] mtd: rawnand: tegra: add devicetree binding Stefan Agner
2018-05-22 17:52 ` Boris Brezillon
2018-05-22 12:07 ` [RESEND PATCH 2/5] mtd: rawnand: add NVIDIA Tegra NAND Flash controller driver Stefan Agner
2018-05-22 12:16 ` Dmitry Osipenko
2018-05-22 12:19 ` Stefan Agner
2018-05-22 13:34 ` Dmitry Osipenko
2018-05-22 14:28 ` Stefan Agner
2018-05-22 14:53 ` Stefan Agner
2018-05-22 17:55 ` Boris Brezillon
2018-05-23 14:18 ` Boris Brezillon
2018-05-24 8:46 ` Stefan Agner
2018-05-24 8:56 ` Boris Brezillon
2018-05-24 11:09 ` Stefan Agner
2018-05-24 12:23 ` Boris Brezillon
2018-05-24 12:41 ` Boris Brezillon
2018-05-24 22:56 ` Stefan Agner
2018-05-27 14:06 ` Miquel Raynal
2018-05-24 12:27 ` Boris Brezillon
2018-05-24 7:45 ` Benjamin Lindqvist
2018-05-24 11:00 ` Stefan Agner
2018-05-24 11:07 ` Boris Brezillon
2018-05-24 11:30 ` Benjamin Lindqvist
2018-05-24 11:53 ` Boris Brezillon
2018-05-24 12:19 ` Stefan Agner [this message]
2018-05-27 14:18 ` Miquel Raynal
2018-05-27 15:13 ` Boris Brezillon
2018-05-27 15:54 ` Miquel Raynal
2018-05-27 16:30 ` Boris Brezillon
2018-05-27 19:08 ` Stefan Agner
2018-05-27 22:04 ` Miquel Raynal
2018-05-28 12:39 ` Stefan Agner
2018-05-31 17:54 ` Stefan Agner
2018-05-31 20:30 ` Boris Brezillon
2018-05-31 21:44 ` Stefan Agner
2018-05-22 12:07 ` [RESEND PATCH 3/5] clk: tegra20: init NDFLASH clock to sensible rate Stefan Agner
2018-05-22 12:07 ` [RESEND PATCH 4/5] ARM: tegra: add Tegra20 NAND flash controller node Stefan Agner
2018-05-22 12:07 ` [RESEND PATCH 5/5] ARM: tegra: enable NAND flash on Colibri T20 Stefan Agner
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