nvme: t6022: Derive die from nvme_base address

For some reason the ans node for t602x devices has an empty
"clock-gates" property. Use the MMIO address instead to determine on
which die the device is.

Fixes: 34f49a5 ("nvme: assume die 0 if clock-gates not set")
Signed-off-by: Janne Grunau <[email protected]>

Author: jannau

src/nvme.c

@@ -302,19 +302,19 @@ bool nvme_init(void)
         return NULL;
     }
 
+    if (adt_get_reg(adt, adt_path, "reg", 3, &nvme_base, NULL) < 0) {
+        printf("nvme: Error getting NVMe base address.\n");
+        return NULL;
+    }
     u32 cg;
     if (ADT_GETPROP(adt, node, "clock-gates", &cg) < 0) {
         printf("nvme: clock-gates not set\n");
-        cg = 0;
+        nvme_die = (nvme_base >> 37) & 3;
+    } else {
+        nvme_die = FIELD_GET(PMGR_DIE_ID, cg);
     }
-    nvme_die = FIELD_GET(PMGR_DIE_ID, cg);
     printf("nvme: ANS is on die %d\n", nvme_die);
 
-    if (adt_get_reg(adt, adt_path, "reg", 3, &nvme_base, NULL) < 0) {
-        printf("nvme: Error getting NVMe base address.\n");
-        return NULL;
-    }
-
     if (!alloc_queue(&adminq)) {
         printf("nvme: Error allocating admin queue\n");
         return NULL;