Attention is currently required from: Felix Singer, Thomas Heijligen, Angel Pons, Anastasia Klimchuk.

Steve Markgraf uploaded patch set #3 to this change.

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programmer: Add bitbanging programmer driver for Linux libgpiod

With this driver, any single board computer, old smartphone, etc. with
a few spare GPIOs can be used for flashrom.

An example invocation looks like this:

flashrom -p linux_gpiod:gpiochip=0,cs=18,sck=19,mosi=13,miso=56

This uses /dev/gpiochip0 with the specified GPIO numbers for the SPI
lines. All arguments are required.

Reading of a 2048 kB flash chip on a Qualcomm MSM8916 SoC @800 MHz:

Found GigaDevice flash chip "GD25LQ16" (2048 kB, SPI) on linux_gpiod.
real    1m 33.96s

Change-Id: Icad3eb7764f28feaea51bda3a7893da724c86d06
Signed-off-by: Steve Markgraf <steve@steve-m.de>
---
M MAINTAINERS
M Makefile
M README
M flashrom.8.tmpl
M include/programmer.h
A linux_gpiod.c
M meson.build
M meson_options.txt
M programmer_table.c
9 files changed, 266 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/01/71801/3

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