We have custom tda4 board and we plan to connect PPS signal from GPS device to WKUP_GPIO0_12.
We enabled PPS support in kernel and added following changes in k3-j721e-common-proc-board.dts file:
I connect the pins WKUP_GPIO0_12 and WKUP_GPIO0_13, and using ppstest tool.The log is here:
It can be found that there is an interrupt, but PPS does not receive the signal
pps-tools link is here:github.com/.../pps-tools
How to check this? Is it the pps-tools problem?