From: Peter Korsgaard <peter@korsgaard.com>
To: Neil Armstrong <narmstrong@baylibre.com>
Cc: linux-amlogic@lists.infradead.org,
Andreas Fenkart <afenkart@gmail.com>,
krzysztof.michonski@digitalstrom.com
Subject: Re: amlogic mmc_partitions support
Date: Mon, 14 Jan 2019 15:35:52 +0100 [thread overview]
Message-ID: <87ef9fxq5z.fsf@dell.be.48ers.dk> (raw)
In-Reply-To: <1d699426-5744-5149-f136-66db54b87056@baylibre.com> (Neil Armstrong's message of "Mon, 14 Jan 2019 11:00:04 +0100")
>>>>> "Neil" == Neil Armstrong <narmstrong@baylibre.com> writes:
> Hi Andreas,
> On 14/01/2019 10:54, Andreas Fenkart wrote:
>> Hi,
>>
>> What is a feasible way to port the vendor supplied
>> drivers/amlogic/mmc/emmc_partitions.c into something that could be
>> mainlined? My thought is to create a custom block/partition/amlogic.c
>> driver. Would that have a chance to be included in mainline?
> Basically, Amlogic uses the eMMC main partition as a MTD devices and uses a
> custom DT partition scheme to export named MTD partitions to user-space.
> They don't use any "standard" partitions schemes on the eMMC main HW partition.
> Mainline will never support DT-defined MMC partitions, and will never support
> a MTD indirection to a MMC HW partition either.
> You can try to implement something similar using FUSE, but it won't be simple.
Not knowing anything about the vendor driver, if this is just about
splitting up a single eMMC partition in sub blocks and not about MTD,
then this can be easily done with the dm-linear target of device mapper,
E.G. something like:
dmsetup create FOO --table "0 <size> linear /dev/mmcblk0 <offset>"
--
Bye, Peter Korsgaard
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next prev parent reply other threads:[~2019-01-14 14:36 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-14 9:54 Andreas Fenkart
2019-01-14 10:00 ` Neil Armstrong
2019-01-14 14:35 ` Peter Korsgaard [this message]
2019-01-14 14:46 ` Neil Armstrong
2019-01-14 14:42 ` Andreas Fenkart
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