The current implementation of the goodix_berlin driver lacks support for
revisions A and B of the Berlin IC. This change adds support for the
gt9897 IC, which is a Berlin-A revision part.
The differences between revision D and A are rather minor, a handful of
address changes and a slightly larger read buffer. They were taken from
the driver published by Goodix, which does a few more things that don't
appear to be necessary for the touchscreen to work properly.
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Tested-by: Luca Weiss <luca.weiss@fairphone.com>
Signed-off-by: Jens Reidel <adrian@mainlining.org>
Link: https://lore.kernel.org/r/20250309062315.35720-3-adrian@mainlining.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
asm/unaligned.h is always an include of asm-generic/unaligned.h;
might as well move that thing to linux/unaligned.h and include
that - there's nothing arch-specific in that header.
auto-generated by the following:
for i in `git grep -l -w asm/unaligned.h`; do
sed -i -e "s/asm\/unaligned.h/linux\/unaligned.h/" $i
done
for i in `git grep -l -w asm-generic/unaligned.h`; do
sed -i -e "s/asm-generic\/unaligned.h/linux\/unaligned.h/" $i
done
git mv include/asm-generic/unaligned.h include/linux/unaligned.h
git mv tools/include/asm-generic/unaligned.h tools/include/linux/unaligned.h
sed -i -e "/unaligned.h/d" include/asm-generic/Kbuild
sed -i -e "s/__ASM_GENERIC/__LINUX/" include/linux/unaligned.h tools/include/linux/unaligned.h
Export a sysfs interface that would allow reading and writing touchscreen
IC registers. With this interface many things can be done in usersapce
such as firmware updates. An example tool that utilizes this interface
for performing firmware updates can be found at [1].
[1] https://github.com/goodix/fwupdate_for_berlin_linux
Signed-off-by: Charles Wang <charles.goodix@gmail.com>
Link: https://lore.kernel.org/r/20240514115135.21410-1-charles.goodix@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
