arm: mvebu: turris_omnia: refactor more code

Refactor RAM size reading from EEPROM in preparation for next patch.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>

diff --git a/board/CZ.NIC/turris_omnia/turris_omnia.c b/board/CZ.NIC/turris_omnia/turris_omnia.c
index 640ee2a..8571541 100644 (file)
--- a/board/CZ.NIC/turris_omnia/turris_omnia.c
+++ b/board/CZ.NIC/turris_omnia/turris_omnia.c
@@ -236,6 +236,31 @@ static bool omnia_read_eeprom(struct omnia_eeprom *oep)
        return true;
 }
 
+static int omnia_get_ram_size_gb(void)
+{
+       static int ram_size;
+       struct omnia_eeprom oep;
+
+       if (!ram_size) {
+               /* Get the board config from EEPROM */
+               if (omnia_read_eeprom(&oep)) {
+                       debug("Memory config in EEPROM: 0x%02x\n", oep.ramsize);
+
+                       if (oep.ramsize == 0x2)
+                               ram_size = 2;
+                       else
+                               ram_size = 1;
+               } else {
+                       /* Hardcoded fallback */
+                       puts("Memory config from EEPROM read failed!\n");
+                       puts("Falling back to default 1 GiB!\n");
+                       ram_size = 1;
+               }
+       }
+
+       return ram_size;
+}
+
 /*
  * Define the DDR layout / topology here in the board file. This will
  * be used by the DDR3 init code in the SPL U-Boot version to configure
@@ -287,37 +312,10 @@ static struct mv_ddr_topology_map board_topology_map_2g = {
 
 struct mv_ddr_topology_map *mv_ddr_topology_map_get(void)
 {
-       static int mem;
-       struct omnia_eeprom oep;
-
-       /* Get the board config from EEPROM */
-       if (!mem) {
-               if (!omnia_read_eeprom(&oep))
-                       goto out;
-
-               printf("Memory config in EEPROM: 0x%02x\n", oep.ramsize);
-
-               if (oep.ramsize == 0x2)
-                       mem = 2;
-               else
-                       mem = 1;
-       }
-
-out:
-       /* Hardcoded fallback */
-       if (mem == 0) {
-               puts("WARNING: Memory config from EEPROM read failed.\n");
-               puts("Falling back to default 1GiB map.\n");
-               mem = 1;
-       }
-
-       /* Return the board topology as defined in the board code */
-       if (mem == 1)
-               return &board_topology_map_1g;
-       if (mem == 2)
+       if (omnia_get_ram_size_gb() == 2)
                return &board_topology_map_2g;
-
-       return &board_topology_map_1g;
+       else
+               return &board_topology_map_1g;
 }
 
 #ifndef CONFIG_SPL_BUILD