Per Jessen wrote:
You need to update your DTB, or create a fragment and merge it with your current DT. Then, use this new DTB to boot your board.
Right. It's good to get my suspicions confirmed, makes it easier to move in the right direction.
Thanks to Guillaume for getting me on the track. To those who might be watching this thread - yes, it's working now! Status: I'm reading three DS18x20 sensors connected to GPIO11. I'm getting mostly good readings, but also quite a few bad ones (temp 85C). I'll update the wiki-page as well as write an entry on my own blog, but for those impatiently waiting - I based everything on the DTB from the FriendlyCore eflasher image. It has way more stuff than we have in the openSUSE JeOS ditto. I guess the source is also available somewhere, but I started out with decompiling to DTS. a) Look for the entry "pinctrl@01c20800" and add a label 'gpio0:' gpio0:pinctrl@01c20800 b) in this section, for instance above the 'csi' entry, add the following: ds1820_pins:w1_pins@0 { label = "Dallas 1-wire"; pins = "PG11"; function = "gpio_in"; pull = <0x1>; }; c) towards the end of the file, add this node: onewire { compatible = "w1-gpio"; pinctrl-names = "default"; pinctrl-0 = <&ds1820_pins>; gpios = <&gpio0 0x0 203 0x1>; status = "okay"; }; I added it after the "leds" node. compile a new dtb: dtc -b 0 -@ -I dts -O dtb your-new.dts >/boot/dtb/your-new.dtb adjust your boot-script and reboot. I am most certainly not very familiar with all of this, and it took a lot of trial & error. Corrections and suggestions are very much welcome. For module 'w1-therm', I ended up adding 'strong_pullup=2' which reduced the number of bad readings, a lot. -- Per Jessen, Zürich (0.4°C) http://www.dns24.ch/ - free dynamic DNS, made in Switzerland. -- To unsubscribe, e-mail: opensuse-arm+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-arm+owner@opensuse.org