I seem to be running into a conflict using the SMI interface
sudo modprobe bcm2835_smi
sudo modprobe bcm2835_smi_dev
sudo modprobe smi_stream_dev
dmesg
[ 1413.067473] pinctrl-bcm2835 fe200000.gpio: pin gpio2 already requested by fe804000.i2c; cannot claim for fe600000.smi
[ 1413.067490] pinctrl-bcm2835 fe200000.gpio: pin-2 (fe600000.smi) status -22
[ 1413.067498] pinctrl-bcm2835 fe200000.gpio: could not request pin 2 (gpio2) from group gpio2 on device pinctrl-bcm2711
[ 1413.067504] smi-bcm2835 fe600000.smi: Error applying setting, reverse things back
[ 1460.269557] w1_master_driver w1_bus_master1: Attaching one wire slave 00.780000000000 crc 3a
[ 1460.275390] w1_master_driver w1_bus_master1: Family 0 for 00.780000000000.3a is not registered.
[ 1507.882060] w1_master_driver w1_bus_master1: Attaching one wire slave 00.f80000000000 crc b6
[ 1507.887805] w1_master_driver w1_bus_master1: Family 0 for 00.f80000000000.b6 is not registered.
[ 1565.942799] w1_master_driver w1_bus_master1: Attaching one wire slave 00.040000000000 crc 61
[ 1565.948672] w1_master_driver w1_bus_master1: Family 0 for 00.040000000000.61 is not registered.
[ 1569.607506] smi-stream-dev: smi_stream_dev_probe (fifo_mtu_multiplier=2, addr_dir_offset=2, addr_ch_offset=3)
This is for a caribou lite hat that uses the SMI interface