HiSilicon Kirin
Appearance
Family of Huawei-manufactured chips, included in almost every Huawei ARM device. Very minimal mainline support is present, but often the proprietary nature of these SoCs makes it difficult to run anything beyond downstream kernels.
Cleaner AOSP kernels can be found, with their own limitations, on the OpenKirin page.
Devices
HiSilicon Kirin
Some SoCs have their own dedicated pages.
WiFi
See WiFi#HiSilicon_WiFi and the packages of HiSilicon phones with working WiFi for reference.
UART
must do this in fastboot:
fastboot oem uart enable