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_ gpio40Do I need to activate them ?Thanks for your help.Christophe.2017-09-16 22:53 GMT+02:00 christophe pages <firstname.lastname@example.org>: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 <email@example.com>:On Sat, Sep 16, 2017 at 1:33 PM, christophe pages <firstname.lastname@example.org> wrote:
> I try to activate the spi on my raspberry3 using a fedora 26.
> I tried these options:
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:
> I see that the support in kernel seems already inside:
> # CONFIG_SPI_DEBUG is not set
> 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.
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