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| 13:33.52 | T0mW | I've got a board with one of those intel Atom thingys on it (E3850) and a speaker output on ILB_8254_SPKR. I'd like to make the buzzer sound, but, it looks like there isn't much (any) support for GPIO on this BayTrail thing? |
| 13:34.58 | T0mW | Nothing yet in the 4.5.1 kernel for this GPIO. Anyone else play with this or other E3850 GPIOs? |
| 13:35.17 | T0mW | jacques2, hey, how it is going? |
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| 17:40.48 | aandrew | not sure if this is the right channel as it's not STRICTLY embedded linux but I'm hoping it's close enough |
| 17:41.13 | aandrew | I've got a Zynq design (Petalinux) and I've got a kernel module that's built outside fo the tree |
| 17:41.15 | aandrew | it works great |
| 17:41.36 | aandrew | I've added a second kernel module outside of the tree that needs a symbol from the first (separate because of licensing crap) |
| 17:42.18 | aandrew | module2 can't find module1's symbol because of versioning (no symbol verson for sym_in_mod1) |
| 17:42.44 | aandrew | now I read on TLDP that the kernel has "make modules_prepare" to handle this, but petalinux-build seems to do this correctly |
| 17:43.00 | aandrew | I see three Modules.symvers (one for mod1, one for mod2 and one for the kernel) |
| 17:43.11 | aandrew | I tried combining them on the target, same error |
| 17:43.54 | aandrew | I put the modules in /lib/modules/xilx-3.17-linux/extra and ran depmod -Ae and I can see modules.symbols shows the symbol I'm interested in, but I still can't load mod2 due ot the same error |
| 17:44.05 | aandrew | I feel I'm very, very close but I'm out of ideas |
| 17:44.14 | aandrew | interestingly, modules.dep does not show mod2 having a dependency on mod1 |
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| 18:47.49 | aandrew | got it |
| 18:47.56 | aandrew | behanw showed me what was going on |
| 18:48.41 | aandrew | out of tree module 1 was building a Module.symvers in its output dir (with the symbol info) but when module 2 was being built, it only looked at the kernel's Module.symvers and thus could not pull the version info out of module 1's file |
| 18:49.03 | aandrew | the quick hack was to copy the line from module 1's Module.symvers into the kernel Module.symvers |
| 18:49.17 | aandrew | the REAL solution is to build module1 and module2 in the same directory |
| 18:51.09 | aandrew | and the general rule is that an out of tree module can only "see" symbols that are come from the kernel or in-tree modules. one out of tree module doesn't have any knowledge of another out of tree module's symbols, and if you build the kernel with CONFIG_MODVERSIONS then just seeing the symbol name in kallsyms isn't enough |
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