Hello Steffen Kothe, and Bartosz Golaszewski, I have a board with the Fintek F81966 chip, and noticed that the GPIO exported in a physical pin wasn't working with the latest kernel. The board is a https://www.jetwaycomputer.com/MI24.html Reading the datasheet and asking for help from Fintek for a way to make both chips work, I ended up with the patch in the following email. Bartosz, I sent it to you because you are listed as maintainer for the GPIO subsystem. Steffen, you made the change that bring support to the F81804, so I hope that you still have a board with the F81804. I only have a board with the F81966, so I can't test if it still works with your board after applying the patch. Despite being a small change, and following the method recommended by the manufacturer, it would be nice to test this on a real board. Can you please test this change in your board, Steffen? If anyone else has a board with F81804, can you please confirm if with this patch the driver recognizes the right GPIO for your board? If is there anything that could be improved in the patch, let me know and I will change it as needed. Thank you all in advance (and Yu Chen from Fintek for the guidance), Guilherme Destefani. Guilherme Destefani (1): GPIO support for Fintek family F819XX drivers/gpio/gpio-f7188x.c | 28 ++++++++++++++++++++++++---- 1 file changed, 24 insertions(+), 4 deletions(-) -- 2.42.0