Hello Christophe,
Were you able to get spi working?
I followed the same steps as listed in this thread and got the same error
message in dmesg.
On Mon, Sep 18, 2017 at 8:30 AM, christophe pages <pageschrist(a)gmail.com>
wrote:
Hello,
I applied these commands:
fdtput --type s /boot/dtb-4.12.13-300.fc26.armv7hl/bcm2837-rpi-3-b.dtb
/soc/spi@7e204000 status "okay"
fdtput --type s /boot/dtb-4.12.13-300.fc26.armv7hl/bcm2837-rpi-3-b.dtb
/soc/spi@7e215080 status "okay"
fdtput --type s /boot/dtb-4.12.13-300.fc26.armv7hl/bcm2837-rpi-3-b.dtb
/soc/spi@7e2150c0 status "okay"
And now I see spi_bcm2835 and spi_bcm2835aux modules started, after the
reboot. But I can't see my /dev/spi* devices.
Do you have an idea of the missing step?
[root@raspchr-fed26 device-tree]# dmesg | grep spi
[ 93.646629] spi-bcm2835 3f204000.spi: no tx-dma configuration found -
not using dma mode
[root@raspchr-fed26 device-tree]#
I still see other devices:
./soc/gpio@7e200000/spi0_gpio35
./soc/gpio@7e200000/spi0_gpio7
./soc/gpio@7e200000/spi1_gpio16
./soc/gpio@7e200000/spi2_gpio40
Do I need to activate them ?
Thanks for your help.
Christophe.
2017-09-16 22:53 GMT+02:00 christophe pages <pageschrist(a)gmail.com>:
> Thanks for your answer, Yes I added these 2 lines in the config.txt file
> like for the raspbain .
> So What do I have to do with the dtb files. I see nothing regarding the
> spi.
> Do I still have to use the config.txt file ?
> Thanks for your help.
>
> 2017-09-16 14:57 GMT+02:00 Peter Robinson <pbrobinson(a)gmail.com>:
>
>> On Sat, Sep 16, 2017 at 1:33 PM, christophe pages <pageschrist(a)gmail.com>
>> wrote:
>> > Hello,
>> > I try to activate the spi on my raspberry3 using a fedora 26.
>> > I tried these options:
>> > device_tree_param=spi=on
>> > dtoverlay=spi-bcm2708
>>
>> Did you add that to config.txt? That way of doing it is specific to
>> Rasspian, the driver in Fedora is the upstream driver which is
>> spi-bcm2835aux and you'll need to either edit the dtb to enable it or
>> use a DT overlay as it's disabled by default.
>>
>> > I use this kernel:
>> > 4.12.5-300.fc26.armv7hl
>> >
>> > I see that the support in kernel seems already inside:
>> > CONFIG_SPI=y
>> > # CONFIG_SPI_DEBUG is not set
>> > CONFIG_SPI_MASTER=y
>> >
>> >
>> > But I never see the devices /dev/spi* appearing.
>> > I can't see any messages regarding spi in dmesg.
>> >
>> > I tested with a raspbian and I see them correctly.
>> > I think I miss somethiing.
>> > Could you help.
>> > Thanks.
>> >
>> > _______________________________________________
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>> >
>>
>
>
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