Reading and writing to and from flash storage is slow and currently,
the ath10kcal_extract() scripts are even more at an disadvantage
because they use a block size of 1 to be able skip.
This patch reworks the extraction scripts to be much faster and
efficient by reading and writing the calibration data in possibly
one big block.
before: (Tested on a RT-AC58U, which has SPI-NAND).
# time dd if=/dev/ubi0_1 of=/lib/firmware/... bs=1 skip=4096 count=12064
12064+0 records in
12064+0 records out
real 0m 0.28s
user 0m 0.02s
sys 0m 0.24s
after:
# time dd if=/dev/ubi0_1 of=/lib/firmware/... bs=12064 skip=4096 count=1 iflag=skip_bytes
1+0 records in
1+0 records out
real 0m 0.01s
user 0m 0.00s
sys 0m 0.00s
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
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