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cubelinux-kernel/Documentation/driver-api/mmc/mmc-tools.rst
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Greg Kroah-Hartman 598cf27219 Linux 6.19.3
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org
Tested-by: Florian Fainelli <florian.fainelli@broadcom.com>
Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com>
Tested-by: Peter Schneider <pschneider1968@googlemail.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Salvatore Bonaccorso <carnil@debian.org>
Tested-by: Brett A C Sheffield <bacs@librecast.net>
Tested-by: Mark Brown <broonie@kernel.org>
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Tested-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2026-02-19 16:33:27 +01:00

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======================
MMC tools introduction
======================
There is one MMC test tools called mmc-utils, which is maintained by Ulf Hansson,
you can find it at the below public git repository:
https://git.kernel.org/pub/scm/utils/mmc/mmc-utils.git
Functions
=========
The mmc-utils tools can do the following:
- Print and parse extcsd data.
- Determine the eMMC writeprotect status.
- Set the eMMC writeprotect status.
- Set the eMMC data sector size to 4KB by disabling emulation.
- Create general purpose partition.
- Enable the enhanced user area.
- Enable write reliability per partition.
- Print the response to STATUS_SEND (CMD13).
- Enable the boot partition.
- Set Boot Bus Conditions.
- Enable the eMMC BKOPS feature.
- Permanently enable the eMMC H/W Reset feature.
- Permanently disable the eMMC H/W Reset feature.
- Send Sanitize command.
- Program authentication key for the device.
- Counter value for the rpmb device will be read to stdout.
- Read from rpmb device to output.
- Write to rpmb device from data file.
- Enable the eMMC cache feature.
- Disable the eMMC cache feature.
- Print and parse CID data.
- Print and parse CSD data.
- Print and parse SCR data.