CAN BUS MCP2515 and dts labels

[Ferdinand Haselbacher]

Hi all,

iam hving difficulties in getting my can stuff working witt BBB ReavA5A and a CAN SPI [Click]

The can MCP2515 is connected to the following pins on the BBB:
RST    P9.12     GPIO1_28    7    30    0x878/078    60 CS     P9.28     SPI1_CS0    3    103    0x99c/19c    113 SCK    P9.31     SPI1_SCLK     3    100    0x990/190    110 MISO    P9.29     SPI1_D0     3    101    0x994/194    111 MOSI    P9.30     SPI1_D1     3    102    0x998/198    112 INT     P9.15     GPIO1_16    7    16    0x840/040    48 +3.3V    P9.3 - P9.4    VDD_3V3EXP    -    -    -    - GND    P9.43 - P9.46    GND    -    -    -    -
This is a CAN SPI Click (Mikroelektronika, BaseCape is a MikroBusCape from [https://www.tigal.com/wiki/doku.php?id=tigalcapes:bb_mikrobus_cape] my DTS is attached it is derived from Towertechs's dts since it uses the same chip. Everything seems to work, dmesg: [   63.667260] mcp251x spi1.0: mode 0, irq 197, awake 1, clkout 0, oscillator freq 10000000 [   63.678535] mcp251x spi1.0 can0: probed ip link set  works, but i never get an interrupt down the line. Towertech's dts used labels for gpio4 (which seems to be gpio3 in reality). i would use gpio1_16 for int, so i referenced it as &gpio2, but as said before i never received an interrupt, my guess is that i messed up something with the gpio's. Anyone can give me a hint on setup/DTS-configuration? so far, Ferdinand

[Eric Schmidt]

Did you ever figure this out? I am attempting the same thing and not having
any luck.

Thanks,
Eric

[Ferdinand Haselbacher]

Yes Did succeed send you more information tonight CET


Ferdinand Haselbacher
  Originalnachricht  
Von: Eric Schmidt
Gesendet: Donnerstag, 29. Oktober 2015 15:10
An: beagl...@googlegroups.com
Antwort an: beagl...@googlegroups.com
Betreff: [beagleboard] Re: CAN BUS MCP2515 and dts labels

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[Ferdinand Haselbacher]

Hi Eric,

which Probles do you encounter?

Do you have mikrobus-capes or another cape/shield?

i can send you my working dts for Angstrom if you want to.

A good starting point for getting this stuff working (if you're not using a mikrobus/cape) is to check TowerTechs TT3201 dts files, that's where i started. Maybe you can post your dts files and i'll see what i can make.

For me it is definitly working.

so far,

Ferdinand

[Mark K Cowan]

Hi,

I'm currently trying to get MCP2515 working via SPI0.0.  I've written my device tree overlay and loaded it with BB-SPIDEV0, but it isn't working (error from dmesg below).  Please could you share/send your working DTS file?

mcp251x spi0.0: could not find pctldev for node /ocp/interrupt-controller@48200000, deferring probe

Thanks,

  Mark