Hi Tyler, and everyone. nice to meet you. We are trying to develop an AEST driver. We checked the llinux ML to see if a patch series has already been posted, and found that you have posted an RFC patch series. [1] https://lore.kernel.org/linux-acpi/1562086280-5351-1-git-send-email-baicar@xxxxxxxxxxxxxxxxxxxxxx/ So We have the following questions. 1) Is it correct to assume that the RFC patch you have already posted is the latest one? 2) In that case, we would like to implement features as needed based on this RFC patch. Is there any problem with that? Best regards, Shuuichirou.