On our custom board, ad9177 spi read chip id ok, check reg w/r ok. but init faild at pre clock init stage.
Ad9177 use a 12ghz external clock as main clock, sysref not connected, no hmc7044.
After print 100 times [ad9177:r@b742 = 33], print error log below.
Pre Clock Boot Sequence Error
Please check power suppliers (no open, no short, no big glitches)
Ensure Clocks are available
ad9177:r@b740 = 02
ad9177:r@b741 = 60
ad9177:r@b742 = 33
ad9177:r@b743 = 00
There is no description about reg b740~b743.
How to debug this problem? any suggestion?