PlanB
Posts: 82
Joined: Tue Oct 28, 2014 6:44 am

.dtbo Vs .dtb

Mon Oct 02, 2017 4:35 am

Device tree puzzles me greatly but I'm making the effort. I've got a w1-gpio-intpullup-overlay.dtb file from my Wheezy days with the DS18B20 that I'd like to use with Jessie. Alas this is pushing my userland slum credentials. Anybody know how to convert this to a Jessie compatible .dtbo file?

PlanB
Posts: 82
Joined: Tue Oct 28, 2014 6:44 am

Re: .dtbo Vs .dtb

Mon Oct 02, 2017 5:19 am

I get this when I try to use the Wheezy .dtb as a .dtbo in Jessie
[ 6.517364] w1-gpio onewire@0: gpio pin 4, external pullup pin -1, parasitic power 0
[ 6.517414] w1_add_master_device: set_pullup requires write_byte or touch_bit, disabling

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DougieLawson
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Re: .dtbo Vs .dtb

Mon Oct 02, 2017 8:47 pm

The latest Raspbian Stretch (wheezy has expired, Jessie has retired) includes two Raspberry Pi Foundation dtb overlays for 1-wire devices. Before continuing with your stuff, try those.

The souce for both of those is available at https://github.com/raspberrypi/linux.
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