dxf
8
You can download and install it manually first
wget http://download.gl-inet.com.s3.amazonaws.com/releases/v19.07.8/kmod-3.0/ath79/nand/kmod-rtc-pcf8563_4.14.209-1_mips_24kc.ipk
opkg install ./kmod-rtc-pcf8563_4.14.209-1_mips_24kc.ipk
Ipk feeds synchronization can take 1 to 2 days