Hi,
I run into a strange thing on our customized RK3399-LPDDR4 using the
UART2 @115200 the
console spits bad charters. Checking the signal at the TX explains the
reason, the rising edge
is very slow, (we checked with the scope).
Set the GPIO4_C4 to pcfg_pull_up_20am not working.
Kernel: 5.4.40-rt
Uboot: 2020-4
The strange observation:
U-boot TPL boot , return to Boot-rom and the 1st
lines from SPL (show uboot version) have a sharp rising edge as expected.
Anyone? I don't know anymore.
Regards
Chris
