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> |
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commands/Kconfig |
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commands/Makefile |
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commands/mmc.c 0 → 100644 |
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include/mci.h |
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