779     return -ENOENT;

   780 }

   781 

   782 /*****************************************************************************/

   783 

   784 int ecrt_slave_config_reg_pdo_entry_pos(

   785         ec_slave_config_t *sc,

   786         uint8_t sync_index,

   787         unsigned int pdo_pos,

   788         unsigned int entry_pos,

   789         ec_domain_t *domain,

   790         unsigned int *bit_position

   791         )

   792 {

   793     const ec_sync_config_t *sync_config;

   794     unsigned int bit_offset, pp, ep;

   795     ec_pdo_t *pdo;

   796     ec_pdo_entry_t *entry;

   797 

   798     EC_CONFIG_DBG(sc, 1, "%s(sc = 0x%p, sync_index = %u, pdo_pos = %u,"

   799             " entry_pos = %u, domain = 0x%p, bit_position = 0x%p)\n",

   800             __func__, sc, sync_index, pdo_pos, entry_pos,

   801             domain, bit_position);

   802 

   803     if (sync_index >= EC_MAX_SYNC_MANAGERS) {

   804         EC_CONFIG_ERR(sc, "Invalid syncmanager position %u.\n", sync_index);

   805         return -EINVAL;

   806     }

   807 

   808     sync_config = &sc->sync_configs[sync_index];

   809     bit_offset = 0;

   810     pp = 0;

   811 

   812     list_for_each_entry(pdo, &sync_config->pdos.list, list) {

   813         ep = 0;

   814         list_for_each_entry(entry, &pdo->entries, list) {

   815             if (pp != pdo_pos || ep != entry_pos) {

   816                 bit_offset += entry->bit_length;

   817             } else {

   818                 unsigned int bit_pos = bit_offset % 8;

   819                 int sync_offset;

   820 

   821                 if (bit_position) {

   822                     *bit_position = bit_pos;

   823                 } else if (bit_pos) {

   824                     EC_CONFIG_ERR(sc, "PDO entry 0x%04X:%02X does"

   825                             " not byte-align.\n",

   826                             pdo->index, entry->subindex);

   827                     return -EFAULT;

   828                 }

   829 

   830                 sync_offset = ec_slave_config_prepare_fmmu(

   831                         sc, domain, sync_index, sync_config->dir);

   832                 if (sync_offset < 0)

   833                     return sync_offset;

   834 

   835                 return sync_offset + bit_offset / 8;

   836             }

   837             ep++;

   838         }

   839         pp++;

   840     }

   841 

   842     EC_CONFIG_ERR(sc, "PDO entry specification %u/%u/%u out of range.\n",

   843            sync_index, pdo_pos, entry_pos);