Panic in FreeBSD 13

[Damianoux]

Hello,

tried to use the driver in FreeBSD13-RC5, got panic with error 17:
make_dev_sv: bad si_name (error 17, si_name=lcd5110)

So i tried to replace make_dev with make_dev_p passing flags MAKEDEV_WAITOK and MAKEDEV_CHECKNAME.

The driver loads but it seems to attempt to create it multiple times:

lcd51100: <Nokia 5110 LCD> at cs 0 node 0 on spibus=0

and extra entries:

lcd51101: <Nokia 5110 LCD> at cs 0 node 0 on spibus=0
device_attach: lcd51101 attach returned 17
lcd51101: <Nokia 5110 LCD> at cs 1 node 0 on spibus=0
device_attach: lcd51101 attach returned 17

The bakclight is turned on but nothing appears on the screen. (checked connections twice, i used the same gpio pins defined in the .h file on a Rpi B+ board). But if i test spi0_clk and spi0_mosi with an oscilloscope something seems to come out when i run:

echo "string" > /dev/lcd5110

Finally on kldunload the backlight turns off but then the kernel panics with

Fatal kernel mode data abort: 'Translation fault (L2)' on read

follows a register dump.

I have created node lcd5110@0 under soc/spi using dts overlay method.
ofwdump -r /soc/ shows it in the right place.

Any suggestion?