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  1. After "git pull" and recompilation it works! Great, thank you.
  2. Nobody knows what is the right way to correct this issue? Do I have to create my own DTBO? Thank you.
  3. Hi, there are invalid references inside sun50i-h5-fixup.scr, I think. I use NANOPINEO2, myself compiled linux-*-current-sunxi64_20.05.0-trunk_arm64.deb, kernel 5.4.28-sunxi64 #trunk SMP PREEMPT. amrbianEnv.txt (reduced): overlay_prefix=sun50i-h5 overlays=i2c0 uart1 uart2 usbhost1 usbhost2 usbhost3 param_uart1_rtscts=1 param_uart2_rtscts=1 For example, the row param_uart2_rtscts=1 leads to use following rows of sun50i-h5-fixup.scr: fdt get value tmp_phandle1 /soc/pinctrl@1c20800/uart2 phandle fdt get value tmp_phandle2 /soc/pinctrl@1c20800/uart2_rts_cts phandle fdt set /soc/serial@1c28800 pinctrl-names "default" "default" fdt set /soc/serial@1c28800 pinctrl-0 "<${tmp_phandle1}>" fdt set /soc/serial@1c28800 pinctrl-1 "<${tmp_phandle2}>" env delete tmp_phandle1 tmp_phandle2 There are some error messages during boot: Applying kernel provided DT fixup script (sun50i-h5-fixup.scr) ## Executing script at 44000000 tmp_bank=A tmp_pin=21 libfdt fdt_path_offset() returned FDT_ERR_NOTFOUND libfdt fdt_path_offset() returned FDT_ERR_NOTFOUND libfdt fdt_path_offset() returned FDT_ERR_NOTFOUND 10046717 bytes read in 505 ms (19 MiB/s) As a result, the RTS/CTS handshaking for UART2 is unfunctional. May be for UART1 and UART3 is the same? I think the reason is that there are no paths /soc/pinctrl@1c20800/uart2 and /soc/pinctrl@1c20800/uart2_rts_cts inside the device tree specified by sun50i-h5-nanopi-neo2-v1.1.dtb file. The right paths are /soc/pinctrl@1c20800/uart2-pins and /soc/pinctrl@1c20800/uart2-rts-cts-pins, I think. Am I right? I've tried easy modification of SCR script - handshaking is now functional, but CRC is bad. If I am right, what is the right way to correct this? Script change (how properly?), DTB change, DTBO creation, ...? Moreover, look at this reduced listing of /sys/firmware/devicetree/base/soc/pinctrl@1c20800: csi-pins emac-rgmii-pins i2c0-pins i2c1-pins i2c2-pins i2s0-pins i2s1-pins mmc0-pins mmc1-pins mmc2-8bit-pins spi0-pins spi1-pins uart0-pa-pins uart1-pins uart1-rts-cts-pins uart2-pins uart2_rts_cts uart2-rts-cts-pins uart3-pins uart3-rts-cts-pins w1_pins Why are somewhere dashes "-" and somewhere underscores "_" ? Thank you.