== uname ==
DragonFly dfbsd 6.5-DEVELOPMENT DragonFly 6.5-DEVELOPMENT #0: Thu Jul  2 06:02:54 UTC 2026     root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC  x86_64
== kldstat ==
Id Refs Address                Size Name
 1   11 0xffffffff80200000  1ad8538 kernel
 2    1 0xffffffff81cd9000    7c288 ehci.ko
 3    1 0xffffffff81d56000    8c778 xhci.ko
 4    4 0xffffffff82600000     1000 iicbus.ko
 5    2 0xffffffff82601000    18000 iicbb.ko
 6    1 0xffffffff82619000     1000 iicbb_reg.ko
 7    1 0xffffffff8261a000     1000 iicbb_harness.ko
 8    1 0xffffffff8261b000     1000 iic.ko
 9    1 0xffffffff8261c000     1000 groom5558.ko
== dmesg tail ==
swap low/high-water marks set to 41940/62910
fakebb0: <fake GPIO bit-bang i2c master+slave> on motherboard
iicbb0: <I2C bit-banging driver> on fakebb0
iicbus0: <Philips I2C bus> on iicbb0 addr 0xff
[fakebb] attach done: resets=3 resets_with_oldaddr=1 bus=0xfffff8011773b200
[fakebb] request_bus error=0
[fakebb] write: error=0 sent=8 slave_rx=deadbeef55aa1234 ok=1
[fakebb] read: error=0 read=8 data=c0c1c2c3c4c5c6c7 ok=1
[fakebb] nacked-write: error=2 (IIC_ENOACK=2) bus_started_after=0
[fakebb] repstart-read: error=0 byte=0xc0 (expect 0xc0)
[fakebb] SUMMARY: write_ok=1 read_ok=1 starts=5 stops=4 rxlen=0 spray_sink=0
rdrand0: No RdRand support.
iic0: <I2C generic I/O> on iicbus0
[df5558] groom5558 loaded (sink=0)
== dev node ==
crw-------  1 root  wheel   32, 0x00000000 Oct 15 22:57 /dev/iic0