Add boot_enable attribute to eMMC device for boot mode operation selection

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.

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(-)

2013/4/19, Neil Armstrong <[email protected]>:

Quoted 7 lines

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.

Quoted 15 lines

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(-)

Thanks for the reply, I was not aware of the mmc-utils tools. I think the tool and the MMC_IOC_CMD interface should be documented in the kernel.