IBASE SMARC-EVK1 - Manual (Page 78)

52 SMARC Evaluation Kit
adapters = more_adapters(adapters, count + 1);
if (!adapters)
return NULL;
}
all = malloc(len_name + len_type + len_algo);
if (all == NULL) {
free_adapters(adapters);
return NULL;
}
adapters[count].nr = i2cbus;
adapters[count].name = strcpy(all, name);
adapters[count].funcs = strcpy(all + len_name, type);
adapters[count].algo = strcpy(all + len_name + len_type,
algo);
count++;
}
fclose(f);
goto done;
}
/* look in sysfs */
/* First figure out where sysfs was mounted */
if ((f = fopen("/proc/mounts", "r")) == NULL) {
goto done;
}
while (fgets(n, NAME_MAX, f)) {
sscanf(n, "%*[^ ] %[^ ] %[^ ] %*s\n", sysfs, fstype);
if (strcasecmp(fstype, "sysfs") == 0) {
foundsysfs++;
break;
}
}
fclose(f);
if (! foundsysfs) {
goto done;
}
/* Bus numbers in i2c-adapter don't necessarily match those in
i2c-dev and what we really care about are the i2c-dev numbers.
Unfortunately the names are harder to get in i2c-dev */
strcat(sysfs, "/class/i2c-dev");
if(!(dir = opendir(sysfs)))
goto done;
/* go through the busses */
while ((de = readdir(dir)) != NULL) {
if (!strcmp(de->d_name, "."))
continue;
if (!strcmp(de->d_name, ".."))
continue;
/* this should work for kernels 2.6.5 or higher and */
/* is preferred because is unambiguous */
sprintf(n, "%s/%s/name", sysfs, de->d_name);
f = fopen(n, "r");
/* this seems to work for ISA */
if(f == NULL) {
sprintf(n, "%s/%s/device/name", sysfs, de->d_name);
f = fopen(n, "r");
}
/* non-ISA is much harder */
/* and this won't find the correct bus name if a driver
has more than one bus */
if(f == NULL) {
sprintf(n, "%s/%s/device", sysfs, de->d_name);
if(!(ddir = opendir(n)))
continue;
while ((dde = readdir(ddir)) != NULL) {
if (!strcmp(dde->d_name, "."))
continue;
if (!strcmp(dde->d_name, ".."))