GPIO申请与配置

if (id == 0) {
//  pwm_dbg(pwm, "[%s]: id == 0 ", __func__);   //zhangq add
  if(gpio_is_valid(S3C64XX_GPF(14))) {
   ret = gpio_request(S3C64XX_GPF(14), "GPF");
   if (ret) {
    printk(KERN_ERR "failed to request GPF for PWM-OUT 0 ");
   }
   s3c_gpio_cfgpin(S3C64XX_GPF(14),S3C64XX_GPF14_PWM_TOUT0);   
  }
 } else if(id == 1) {
  if(gpio_is_valid(S3C64XX_GPF(15))) {
   ret = gpio_request(S3C64XX_GPF(15), "GPF");
   if (ret)