op 22-01-15 18:01, Peter Robinson schreef:Ok, then I would like to avoid them, I'm hoping to also run freebsd in the future and I don't think they they will have the device tree overlay stuff.On Thu, Jan 22, 2015 at 4:48 PM, Bram Van Steenlandt <bram@xxxxxxxxxxx> wrote:Hi, I installed fedora 21 on a beaglebone black, I was amazed how easy this was and how well most things work.Good news.I can't seem to get GPIO working, first dtc needed a patch for the -@ option, after I finally seem to got that working I now find I have no /sys/devices/bone_capemgr* directory.The capemgr bits are a custom kernel from BBone that never made it upstream. The ability to do DeviceTree overlays only landed mainline in 3.19 so you would need at 3.19rc5 [1] or later Fedora kernel. I've got as far as testing that the kernel boots on the BBB with the kernel with overlays enabled but not had enough time to test them. output works by doing:Can anyone here confirm the status of GPIO (and other cape features) ? does it require a custom kernel ? Am I missing someting ?GPIO works, it doesn't need capes to do that. Basically overlays are just a means of automating the configuration of all features on a particular addon card whether you call it a cape, a hat or an expansion board. Depending on what device you're trying to configure you might just be able to do it with a basic script. echo 48 > /sys/class/gpio/export echo out > /sys/class/gpio/gpio48/direction echo 1 > /sys/class/gpio/gpio48/value however, for the input I need to enable the pull up resistor ( I think). cat /sys/kernel/debug/pinctrl/44e10800.pinmux/pins | grep "pin 46" pin 46 (44e108b8.0) 00000008 pinctrl-single I need to change this (00000008) but can't seem to figure out how. The board I'm trying to use has a dts file saying: 0x030 0x37 /* INPUT MODE7 pullup */ Is there an equivalent to achieve this without a dts file ? All information I found seems to point either to the device tree overlay stuff or /sys/kernel/debug/omap_mux/gmpc* all I have here is a subdirectory board which is empty. Thx Peter [1] http://koji.fedoraproject.org/koji/buildinfo?buildID=604938 |
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