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From: Richard Weinberger <richard@nod.at>
To: Pavel Machek <pavel@ucw.cz>
Cc: "Pali Rohár" <pali.rohar@gmail.com>,
	"David Woodhouse" <dwmw2@infradead.org>,
	"Brian Norris" <computersforpeace@gmail.com>,
	"Boris Brezillon" <boris.brezillon@free-electrons.com>,
	"Marek Vasut" <marek.vasut@gmail.com>,
	"Artem Bityutskiy" <dedekind1@gmail.com>,
	linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/5] mtd: block2mtd: Add support for specifying MTD write size and subpage shift
Date: Sun, 18 Jun 2017 12:11:40 +0200	[thread overview]
Message-ID: <8440a46a-0ba2-b00f-e55b-d0a0fa9b8aa6@nod.at> (raw)
In-Reply-To: <20170618100626.GC20211@amd>

Pavel,

Am 18.06.2017 um 12:06 schrieb Pavel Machek:
> Hi!
> 
>>>>>> Am 02.06.2017 um 17:43 schrieb Pali Rohár:
>>>>>>> It is needed for creating emulated devices suitable for using in UBI layer
>>>>>>> and with UBIFS.
>>>>>>
>>>>>> Why?
>>>>>
>>>>> ubifs depends on write size of nand. And without those parameters as
>>>>> specified in cover letter I'm unable to mount N900 rootfs image exported
>>>>> via block2mtd. ubifs reject such image.
>>>>
>>>> Hmm, so you render block2mtd into a semi-NAND chip? :)
>>>
>>> Probably you can call it like that. But it is still MTD device...
>>
>> This is what I meant in my other mail.
>> You add NAND specific properties but still denote it as MTD_RAM/ROM.
>> I'm not sure whether this is a good idea.
> 
> Can you suggest any other way for Pali to mount rootfs image on his
> PC?

Are you my micro manager? ;-)

As stated in my other mail, we have nandsim and there is work going on
to allow specifying arbitrary NAND sizes.
An alternative approach can be found here:
https://lkml.org/lkml/2016/5/12/296

Thanks,
//richard

  reply	other threads:[~2017-06-18 10:11 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-02 15:43 [PATCH 0/5] Extends block2mtd and ubi drivers Pali Rohár
2017-06-02 15:43 ` [PATCH 1/5] mtd: block2mtd: Check for valid user supplied erase size Pali Rohár
2017-07-21 19:45   ` Richard Weinberger
2017-06-02 15:43 ` [PATCH 2/5] mtd: block2mtd: Add support for specifying MTD write size and subpage shift Pali Rohár
2017-06-02 16:13   ` Richard Weinberger
2017-06-05 11:21     ` Pali Rohár
2017-06-05 11:23       ` Richard Weinberger
2017-06-05 11:25         ` Pali Rohár
2017-06-05 11:27           ` Richard Weinberger
2017-06-07  8:46             ` Pali Rohár
2017-06-18 10:06             ` Pavel Machek
2017-06-18 10:11               ` Richard Weinberger [this message]
2017-07-17 12:34                 ` Pali Rohár
2017-06-02 15:43 ` [PATCH 3/5] mtd: block2mtd: Fallback to read-only mode Pali Rohár
2017-07-21 19:53   ` Richard Weinberger
2017-07-25 14:28     ` Pali Rohár
2017-06-02 15:43 ` [PATCH 4/5] mtd: block2mtd: Add support for deleting block2mtd mapping Pali Rohár
2017-07-21 19:56   ` Richard Weinberger
2017-07-25 14:24     ` Pali Rohár
2017-08-06  9:39       ` Richard Weinberger
2017-06-02 15:43 ` [PATCH 5/5] ubi: Allow to use read-only UBI volume with not enough PEBs Pali Rohár
2017-07-21 20:12   ` Richard Weinberger
2017-07-25 14:27     ` Pali Rohár
2017-08-06  9:43       ` Richard Weinberger
2017-08-06 10:30         ` Pali Rohár
2017-06-02 16:17 ` [PATCH 0/5] Extends block2mtd and ubi drivers Richard Weinberger
2017-06-05 11:18   ` Pali Rohár

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