IBASE SMARC-EVK1 - Manual (Page 79)

Copyright © 2013 IBASE Technology Inc. All Rights Reserved.
53 IBASE Technology Inc.
continue;
if ((!strncmp(dde->d_name, "i2c-", 4))) {
sprintf(n, "%s/%s/device/%s/name",
sysfs, de->d_name, dde->d_name);
if((f = fopen(n, "r")))
goto found;
}
}
}
found:
if (f != NULL) {
int i2cbus;
enum adt type;
char *px;
px = fgets(s, 120, f);
fclose(f);
if (!px) {
fprintf(stderr, "%s: read error\n", n);
continue;
}
if ((px = strchr(s, '\n')) != NULL)
*px = 0;
if (!sscanf(de->d_name, "i2c-%d", &i2cbus))
continue;
if (!strncmp(s, "ISA ", 4)) {
type = adt_isa;
} else {
/* Attempt to probe for adapter capabilities */
type = i2c_get_funcs(i2cbus);
}
if ((count + 1) % BUNCH == 0) {
/* We need more space */
adapters = more_adapters(adapters, count + 1);
if (!adapters)
return NULL;
}
adapters[count].nr = i2cbus;
adapters[count].name = strdup(s);
if (adapters[count].name == NULL) {
free_adapters(adapters);
return NULL;
}
adapters[count].funcs = adap_types[type].funcs;
adapters[count].algo = adap_types[type].algo;
count++;
}
}
closedir(dir);
done:
return adapters;
}
static int lookup_i2c_bus_by_name(const char *bus_name)
{
struct i2c_adap *adapters;
int i, i2cbus = -1;
adapters = gather_i2c_busses();
if (adapters == NULL) {
fprintf(stderr, "Error: Out of memory!\n");
return -3;
}
/* Walk the list of i2c busses, looking for the one with the
right name */
for (i = 0; adapters[i].name; i++) {