> On Apr 30, 2018, at 12:47 , Chad Baker <[email protected]> wrote: > > It is a workaround for a bug, I believe. When I enable the dtbo, I get the > following directory constructed during the boot process > /sys/devices/platform/ocp/ocp:P9_28_pinmux > Without the dtbo, this directory is missing.
Oh I see, thanks. > Chad > > On 4/30/18 2:24 PM, Rick Mann wrote: >>> On Apr 30, 2018, at 08:22 , Chad Baker <[email protected]> wrote: >>> >>> Did you add the BB-SPIDEV1-00A0.dtbo to the device tree boot list in >>> uEnv.txt? >> Should that be necessary if one is using CAPE-UNIVERSAL? >> >> >>> Chad >>> >>> >>> On 4/30/18 7:51 AM, [email protected] wrote: >>>> Hi all, >>>> >>>> I have to bring this thread to life again, as I'm facing the same issue: >>>> >>>> all I want to do is to assign p9_29 as "spi_cs" on my BBB running >>>> "4.9.78-ti-r94". >>>> >>>> Running "config-pin -l p9_28" leads to "default gpio gpio_pu gpio_pd >>>> gpio_input spi_cs pwm pruout pruin". So all looks good, as this pin can be >>>> used in spi_cs mode. >>>> >>>> Now I want to configure the pin to actually work as spi pin: >>>> >>>> config-pin p9_28 spi_cs >>>> P9_28 pinmux file not found! >>>> sudo: no askpass program specified, try setting SUDO_ASKPASS >>>> Cannot write pinmux file: /sys/devices/platform/ocp/ocp*P9_28_pinmux/state >>>> >>>> The same error is printed when running "config-pin p9_29 spi" or >>>> "config-pin p9_31 spi_sclk". However, command "config-pin p9_30 spi" works >>>> well. >>>> >>>> Would really appreciate if someone can help out here! >>>> >>>> Best regards, >>>> Marco >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> Am Samstag, 28. Januar 2017 02:51:38 UTC+1 schrieb Charles Steinkuehler: >>>> On 1/27/2017 7:43 PM, Drew Fustini wrote: >>>>> Charles / Robert: >>>>> Should P9.28 be SPI by default? >>>> All pins are GPIO by default, with pull up/down set to match the reset >>>> defaults of the processor. To use P9.28 as SPI, in addition to >>>> loading cape-universal, it is necessary to run: >>>> >>>> config-pin P9.28 spi >>>> >>>> If this does not result in the pinmux being set to spi, it's a bug. >>>> >>>> -- >>>> Charles Steinkuehler >>>> [email protected] >>>> -- >>>> 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/89254b2e-33ca-4ea0-bb9f-3ca89270f89c%40googlegroups.com. >>>> For more options, visit https://groups.google.com/d/optout. >>> >>> -- >>> 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/30e8fef7-bd03-37a6-b8a9-e4bfad41445d%40gmail.com. >>> For more options, visit https://groups.google.com/d/optout. >> > > -- > 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/22d4ab18-c370-d437-fa7b-c4cf404ea358%40gmail.com. > For more options, visit https://groups.google.com/d/optout. -- Rick Mann [email protected] -- 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/1223A9DC-0C61-467C-A31A-8378F6929805%40latencyzero.com. For more options, visit https://groups.google.com/d/optout.
