linux-kernel - Re: [PATCH 0/3] Add boot_enable attribute to eMMC device for boot mode operation selection

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Message-ID: <CAKYAXd_xa--1QpFCdz3Kj0mKF3cvtxFn-xL3QGWZyXPO4Y79ng@mail.gmail.com>
Date:	Mon, 22 Apr 2013 13:55:04 +0900
From:	Namjae Jeon <linkinjeon@...il.com>
To:	narmstrong@...tion.com
Cc:	linux-mmc@...r.kernel.org, Chris Ball <cjb@...top.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Seungwon Jeon <tgih.jun@...sung.com>,
	Subhash Jadavani <subhashj@...eaurora.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Nam-Jae Jeon <namjae.jeon@...sung.com>
Subject: Re: [PATCH 0/3] Add boot_enable attribute to eMMC device for boot
 mode operation selection

2013/4/19, Neil Armstrong <narmstrong@...tion.com>:
> Since eMMC 4.3 a special boot mode operation was introduced to retrieve
> data from the eMMC device with a very simple procedure. Since the Linux
> kernel exports these device boot partitions, it may be useful to select
> the boot partition from the user space.
>
> The patch has been tested on a Toshiba eMMC conforming with eMMC 4.5
> specifications.
Hi Neil.
We can be enable boot partition using mmc-utils.
See this address.
https://git.kernel.org/cgit/linux/kernel/git/cjb/mmc-utils.git/commit/?id=7bd1320b2cb38f040ab5cf017d17e283496690bf

So, I don't think this patch is useful.
If you consider to be disable boot partition, you can try to update
mmc-utils base on the address I shared.

Thanks.
>
> Neil Armstrong (3):
>   Add BOOT_PARTITION_ENABLE definition to MMC EXT_CSD PART_CONFIG
>   Add boot_enable sysfs attribute to select MMC boot operation
>     partition
>   Add Documentation for MMC boot_enable attribute
>
>  Documentation/mmc/mmc-dev-parts.txt |    6 +++
>  drivers/mmc/card/block.c            |   72
> ++++++++++++++++++++++++++++++++++-
>  include/linux/mmc/mmc.h             |    1 +
>  3 files changed, 78 insertions(+), 1 deletions(-)
>
>
>
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