int module_loaded(const char *module)
{
char sys_path[128];
snprintf(sys_path, sizeof(sys_path), "/sys/module/%s", module);
return d_exists(sys_path);
}
/* Export specified GPIO
* @return:
* 0: success
* otherwise: fail
*/
static int __export_gpio(uint32_t gpio)
{
char gpio_path[PATH_MAX], export_path[PATH_MAX], gpio_str[] = "999XXX";
if (!d_exists(GPIOLIB_DIR)) {
_dprintf("%s does not exist!\n", __func__);
return -1;
}
sprintf(gpio_path, "%s/gpio%d", GPIOLIB_DIR, gpio);
if (d_exists(gpio_path))
return 0;
sprintf(export_path, "%s/export", GPIOLIB_DIR);
sprintf(gpio_str, "%d", gpio);
f_write_string(export_path, gpio_str, 0, 0);
return 0;
}