tree 5f0a5f64bb89743c02c119da13f8cd1c4f70ba7e
parent b5ffed60344217373e719c398ea907a102b646bb
author Joel Stanley <joel@jms.id.au> 1478500677 +1030
committer Joel Stanley <joel@jms.id.au> 1478504596 +1030

pflash: fix erase command when using mtd backend

The libflash mtd backend lacked support for full-chip erase so it did
not work.  This patch adds that support to libflash. Patch is on it's
way upstream[1].

Note: the old MMIO access method could perform a wole-chip
erase on SPI NOR parts that supported it. This was sometimes a fraction
faster than erasing each page one-by-one when re-flashing the entire
chip.

The mtd API does not (yet) provide a userspace API for that, so libflash
always erases the flash one page at a time. This means you are better
off using the -e command over -E.

Fixes: openbmc/openbmc#747

[1] http://patchwork.ozlabs.org/patch/691765/

Change-Id: I20cf50e70a8487edc8cd77d41e73832913237b1b
Signed-off-by: Joel Stanley <joel@jms.id.au>