diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2019-09-09 22:34:51 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2019-09-12 10:30:12 +0200 |
| commit | f3db31188849c0f7f603789d125eb60e5f139061 (patch) | |
| tree | 3e42d45db363213b0b81c1a5c15f058b76078800 /commands/Kconfig | |
| parent | 4159407136abb44ca26fac22ab5397236fccc410 (diff) | |
| download | barebox-f3db31188849c0f7f603789d125eb60e5f139061.tar.gz barebox-f3db31188849c0f7f603789d125eb60e5f139061.tar.xz | |
mci: implement command to switch a mmc device to enhanced mode
The command structure allows adding more subcommands and is designed to
match the Linux program mmc from the mmc-utils. So later more commands
can easily be added if need be.
Compared to mmc-utils'
mmc enh_area set <-y|-n|-c> <start KiB> <length KiB> <device>
the command that is implemented here (
mmc enh_area [-c] <device>
) is easier to use (because you don't have to check the maximal allowed
size by reading some registers and calculate the available size from
them (which then must be calculated back to register values by the mmc
command)) but less flexible as it doesn't allow all the crazy
possibilities specified in the eMMC standard (yet?) but just creates an
enhanced area with maximal size.
In the future something like
mmc enh_area -s 30k <device>
could be used to not use the maximal but an explicit size.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'commands/Kconfig')
| -rw-r--r-- | commands/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/commands/Kconfig b/commands/Kconfig index e03110fd46..1e7e72fce0 100644 --- a/commands/Kconfig +++ b/commands/Kconfig @@ -233,6 +233,17 @@ config CMD_VERSION barebox 2014.05.0-00142-gb289373 #177 Mon May 12 20:35:55 CEST 2014 +config CMD_MMC + tristate + prompt "mmc command allowing to set enhanced area" + depends on MCI + help + Configure mmc cards similar to the userspace mmc utility. Compared to + mmc_extcsd it works on a higher abstraction level. + + Currently only the enh_area subcommand is implemented to configure + the "Enhanced Area" of an mmc device. + config CMD_MMC_EXTCSD tristate prompt "read/write eMMC ext. CSD register" |