Modify YM-2651Y SN offet

platform/broadcom/sonic-platform-modules-accton/as7326-56x/modules/pddf_custom_psu.c

@@ -51,7 +51,7 @@ struct model_name_info models[] = {
 };
 
 struct serial_number_info serials[] = {
-{PSU_TYPE_AC_110V, 0x2e, 18, 18,  "YM-2651Y"},
+{PSU_TYPE_AC_110V, 0x35, 18, 18,  "YM-2651Y"},
 {PSU_TYPE_DC_48V,  0x2e, 18, 18,  "YM-2651V"},
 {PSU_TYPE_DC_12V,  0x2e, 18, 18,  "PSU-12V-750"},
 {PSU_TYPE_AC_ACBEL_FSF019, 0x2e, 16, 16, "FSF019-"}
@@ -97,6 +97,7 @@ ssize_t pddf_get_custom_psu_serial_num(struct device *dev, struct device_attribu
 {
     struct i2c_client *client = to_i2c_client(dev);
     struct pddf_psu_data data;
+    char sub_type[4];
     int i, status;
 
     for (i = 0; i < ARRAY_SIZE(models); i++) {
@@ -117,6 +118,30 @@ ssize_t pddf_get_custom_psu_serial_num(struct device *dev, struct device_attribu
         /* Determine if the model name is known, if not, read next index
          */
         if (strncmp(data.model_name, models[i].model_name, models[i].chk_length) == 0) {
+            /*For YM-2651Y BR. BR use offset-0x2e to store SN.
+             *B01R use offset-0x35 to store store SN. Default use 0x35 for YM-2651Y
+             */
+            if(!strncmp(models[i].model_name, "YM-2651Y", sizeof(models[i].model_name)))
+            {
+            	memset(sub_type, 0, sizeof(sub_type));
+                status = pddf_psu_read_block(client, 0x29,
+                                           sub_type, sizeof(sub_type));
+
+                if (status < 0) {
+                    data.serial_number[0] = '\0';
+                    dev_dbg(&client->dev, "unable to read sub_type from (0x%x) offset(0x%x)\n",
+                                  client->addr, 0x29);
+                    return status;
+                }
+                else
+                {
+                    if(!strncmp(sub_type,"BR" , 2))
+                    {                       
+                        serials[i].offset=0x2e;
+                    }
+                }
+            }
+
             status = pddf_psu_read_block(client, serials[i].offset,
                                            data.serial_number, serials[i].length);