Hi All - I am not very familiar with using this chat so please have patience with me.
I am working on a beaglebone black based system that we are trying to move from kernel Ver 3.8 to 4.4. We have a working code base that runs on ver 3.8 but when I try to run it on ver 4.4 I get the message 11.682162] omap2_mcspi 48030000.spi: chipselect 0 already in use [ 11.688461] spi_master spi1: spi_device register error /ocp/spi@48030000/channel@0 [ 11.696131] of_spi_notify: failed to create for '/ocp/spi@48030000/channel@0' [ 11.703325] __of_changeset_entry_notify: notifier error @/ocp/spi@48030000/channel@0 [ 11.884030] omap2_mcspi 48030000.spi: chipselect 1 already in use [ 11.890275] spi_master spi1: spi_device register error /ocp/spi@48030000/channel@1 [ 11.897937] of_spi_notify: failed to create for '/ocp/spi@48030000/channel@1' [ 11.905139] __of_changeset_entry_notify: notifier error @/ocp/spi@48030000/channel@1 [ 12.215468] omap2_mcspi 481a0000.spi: chipselect 0 already in use [ 12.221776] spi_master spi2: spi_device register error /ocp/spi@481a0000/channel@0 [ 12.229461] of_spi_notify: failed to create for '/ocp/spi@481a0000/channel@0' [ 12.236658] __of_changeset_entry_notify: notifier error @/ocp/spi@481a0000/channel@0 [ 12.642142] omap2_mcspi 481a0000.spi: chipselect 1 already in use [ 12.648433] spi_master spi2: spi_device register error /ocp/spi@481a0000/channel@1 [ 12.656098] of_spi_notify: failed to create for '/ocp/spi@481a0000/channel@1' [ 12.663293] __of_changeset_entry_notify: notifier error @/ocp/spi@481a0000/channel@1 This appears in the dmesg log and at boot up. during boot I get the message loading /boot/dtbs/4.4.113-ti-r145/am335x-boneblack-uboot.dtb ... so It seems there is a conflict between this file and my device tree which uses the same settings as BB-SPIDEV0-00A0.dts and BB-SPIDEV1-00A0.dts I have tried using the BB-SPIDEV0 dtbo files instead and get same problem. The SPI ports (0 and 1) both work correctly except that the spi0 chip select line functions correctly on program startup but when I call it for a specific function it goes low and stays low. so really ther are 2 questions - Why is this not allowing my normal functioning of the device tree like it was. 2 - Is there something that changed with the way ioctl() handles the spi accesses that is now broken in ver 4.4 but worked ok in ver 3.8 the complete version I am using is Linux beaglebone 4.4.113-ti-r145 #1 SMP Mon Jan 29 19:44:54 UTC 2018 armv7l GNU/Linux Please let me know if there is specific information I can supply to help resolve this question? Thanks Mark -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/6bfd025f-1bce-4612-a2bc-0e867eed5eb5n%40googlegroups.com.
