Linux4.1.12: omap2_mcspi 48030000.spi: chipselect 0 already in use

[pw8...@gmail.com]

Hi Guys,

I'm trying to enable SPI using the cape manager on a 4.1.12 kernel, but keep getting the following errors. Can anyone suggest why?

I'm using the overlays from https://github.com/RobertCNelson/bb.org-overlays

/ # echo BB-SPIDEV0 > /sys/devices/platform/bone_capemgr/slots

[   72.388319] bone_capemgr bone_capemgr: part_number 'BB-SPIDEV0', version 'N/A'

[   72.395754] bone_capemgr bone_capemgr: slot #5: override

[   72.401214] bone_capemgr bone_capemgr: Using override eeprom data at slot 5

[   72.408221] bone_capemgr bone_capemgr: slot #5: 'Override Board Name,00A0,Override Manuf,BB-SPIDEV0'

[   72.425331] omap2_mcspi 48030000.spi: chipselect 0 already in use

[   72.441138] spi_master spi2: spi_device register error /ocp/spi@48030000/channel@0

[   72.452230] of_spi_notify: failed to create for '/ocp/spi@48030000/channel@0'

[   72.473986] __of_changeset_entry_notify: notifier error @/ocp/spi@48030000/channel@0

[   72.482189] omap2_mcspi 48030000.spi: chipselect 1 already in use

[   72.488410] spi_master spi2: spi_device register error /ocp/spi@48030000/channel@1

[   72.496047] of_spi_notify: failed to create for '/ocp/spi@48030000/channel@1'

[   72.503347] __of_changeset_entry_notify: notifier error @/ocp/spi@48030000/channel@1

[   72.511260] bone_capemgr bone_capemgr: slot #5: dtbo 'BB-SPIDEV0-00A0.dtbo' loaded; overlay id #1

/ # echo BB-SPIDEV1 > /sys/devices/platform/bone_capemgr/slots

[   14.440083] bone_capemgr bone_capemgr: part_number 'BB-SPIDEV1', version 'N/A'

[   14.447374] bone_capemgr bone_capemgr: slot #4: override

[   14.452885] bone_capemgr bone_capemgr: Using override eeprom data at slot 4

[   14.459954] bone_capemgr bone_capemgr: slot #4: 'Override Board Name,00A0,Override Manuf,BB-SPIDEV1'

[   14.480507] omap2_mcspi 481a0000.spi: chipselect 0 already in use

[   14.486650] spi_master spi1: spi_device register error /ocp/spi@481a0000/channel@0

[   14.520627] of_spi_notify: failed to create for '/ocp/spi@481a0000/channel@0'

[   14.527821] __of_changeset_entry_notify: notifier error @/ocp/spi@481a0000/channel@0

[   14.536247] omap2_mcspi 481a0000.spi: chipselect 1 already in use

[   14.542494] spi_master spi1: spi_device register error /ocp/spi@481a0000/channel@1

[   14.550255] of_spi_notify: failed to create for '/ocp/spi@481a0000/channel@1'

[   14.557425] __of_changeset_entry_notify: notifier error @/ocp/spi@481a0000/channel@1

[   14.565331] bone_capemgr bone_capemgr: slot #4: dtbo 'BB-SPIDEV1-00A0.dtbo' loaded; overlay id #0

[Robert Nelson]

On Fri, Nov 13, 2015 at 5:06 AM, <pw8...@gmail.com> wrote:
>
> Hi Guys,
>
> I'm trying to enable SPI using the cape manager on a 4.1.12 kernel, but keep
> getting the following errors. Can anyone suggest why?
>
> I'm using the overlays from https://github.com/RobertCNelson/bb.org-overlays
>
> / # echo BB-SPIDEV0 > /sys/devices/platform/bone_capemgr/slots
> [ 72.388319] bone_capemgr bone_capemgr: part_number 'BB-SPIDEV0', version
> 'N/A'
> [ 72.395754] bone_capemgr bone_capemgr: slot #5: override
> [ 72.401214] bone_capemgr bone_capemgr: Using override eeprom data at slot
> 5
> [ 72.408221] bone_capemgr bone_capemgr: slot #5: 'Override Board
> Name,00A0,Override Manuf,BB-SPIDEV0'

> [ 72.425331] omap2_mcspi 48030000.spi: chipselect 0 already in use

> [ 72.482189] omap2_mcspi 48030000.spi: chipselect 1 already in use

Check:

cat /sys/devices/platform/bone_capemgr/slots

Something is already taking over the spi chipselect

More then likely it's cape-universal, just remove the
"cape_universal=enable from /boot/uEnv.txt

Regards,

--
Robert Nelson
https://rcn-ee.com/

[Peter Wilson]

Thanks Robert. Still struggling on this one.

I have no capes loaded in the capemgr when I "cat /sys/devices/platform/bone_capemgr/slots"

If I check /sys/bus/spi, I originally had a driver da9052 loaded, but I have since removed it.

My sysfs now looks like:

/sys/bus/spi # ls -R *

drivers_autoprobe  drivers_probe      uevent

devices:

drivers: