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dfu: mmc: Add support for exposing whole mmc device

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Add support for exposing the whole mmc device by setting the 'size'
parameter to 0. This can be useful in case it is not clear what the
total device size is up front. Update the documentation accordingly.

Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Link: https://lore.kernel.org/r/20231029223740.284149-1-marex@denx.de
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
This commit is contained in:
Marek Vasut 2023-10-29 23:37:22 +01:00 • committed by Mattijs Korpershoek
parent 355aab94d1
commit 60d904a494
2 changed files with 15 additions and 0 deletions
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5
doc/usage/dfu.rst
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@ -121,6 +121,11 @@ mmc
with
offset
is the offset in the device (hexadecimal without "0x")
size
is the size of the access area (hexadecimal without "0x")
or 0 which means whole device
partid
being the GPT or DOS partition index,
num

10
drivers/dfu/dfu_mmc.c
View file

@ -386,6 +386,16 @@ int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr, char **argv, int a
dfu->data.mmc.lba_size = third_arg;
dfu->data.mmc.lba_blk_size = mmc->read_bl_len;
/*
* In case the size is zero (i.e. mmc raw 0x10 0),
* assume the user intends to use whole device.
*/
if (third_arg == 0) {
struct blk_desc *blk_dev = mmc_get_blk_desc(mmc);
dfu->data.mmc.lba_size = blk_dev->lba;
}
/*
* Check for an extra entry at dfu_alt_info env variable
* specifying the mmc HW defined partition number