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serprog: Add support for multiple SPI chip selects

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Tested with an EliteBook 8560w, Pi Pico, and my serprog firmware:
https://codeberg.org/Riku_V/pico-serprog/

As seen on Flashprog: https://review.sourcearcade.org/c/flashprog/+/51

Change-Id: If8052bc6f5c314dcc493bc083bb8270723efaae7
Signed-off-by: Riku Viitanen <riku.viitanen@protonmail.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/80498
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
This commit is contained in:
Riku Viitanen
2024-01-15 19:15:49 +02:00
committed by Anastasia Klimchuk
parent 6d128a4fff
commit e8c350f55e
3 changed files with 39 additions and 1 deletions
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8
doc/classic_cli_manpage.rst
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@ -741,6 +741,14 @@ Example that sets the frequency to 2 MHz::
flashrom -p serprog:dev=/dev/device:baud,spispeed=2M
Optional ``cs`` parameter can be used to switch which chip select number is used. This allows connecting multiple
chips at once and selecting which one to flash by software means (rather than rewiring)::
flashrom -p serprog:dev=/dev/device:baud,cs=0
The particular programmer implementation needs to support this feature, for it to work. If the requested chip
select isn't available, flashrom will fail safely.
More information about serprog is available in **serprog-protocol.txt** in the source distribution.