> On Sep 25, 2022, at 8:59 PM, Daryl Tester > <dt-m...@handcraftedcomputers.com.au> wrote: > > I've got a todo item to see how > to enable the dev_dbg() messages
I looked, hoping to spare you from rebooting with debug enabled the old fashioned way. If the kernel has DYNAMIC_DEBUG=y [1] then: https://stackoverflow.com/a/63682160 TL;DR: mount debugfs if not mounted, tell /sys/kernel/debug/dynamic_debug/control the kernel file you want output from, look in kern.log Just tested the debug control procedure against ftdi_sio.c and it worked fine to produce some output. Unfortunately said serial chip is downstairs and I'm stuck upstairs for several more hours so it's a bit inconvenient to reinitialize the chip from here to watch it come up. DYNAMIC_DEBUG is pretty neat! It didn't exist last time I touched driver code. [1] https://www.kernel.org/doc/html/v4.11/admin-guide/dynamic-debug-howto.html
