nvkm_longopt
_ver = nvkm_longopt(_s->device->cfgopt, _option, -2); \
_ver = nvkm_longopt(_s->device->cfgopt, _option, _fwv); \
long nvkm_longopt(const char *optstr, const char *opt, long value);
chipset = nvkm_longopt(device->cfgopt, "NvChipset", 0);
acr->wpr_prev = nvkm_longopt(device->cfgopt, "NvAcrWprPrevAddr", 0);
wprfw = nvkm_longopt(device->cfgopt, "NvAcrWpr", -1);
clk->boost_mode = nvkm_longopt(device->cfgopt, "NvBoost",
fb->page = nvkm_longopt(device->cfgopt, "NvFbBigPage", fb->func->default_bigpage);
size = nvkm_longopt(device->cfgopt, "MmuDebugBufferSize", size);
mode = nvkm_longopt(device->cfgopt, "NvAGP", mode);