+static enum dev_type sbridge_get_width(struct sbridge_pvt *pvt, u32 mtr)
+{
+ /* there's no way to figure out */
+ return DEV_UNKNOWN;
+}
+
+static enum dev_type __ibridge_get_width(u32 mtr)
+{
+ enum dev_type type;
+
+ switch (mtr) {
+ case 3:
+ type = DEV_UNKNOWN;
+ break;
+ case 2:
+ type = DEV_X16;
+ break;
+ case 1:
+ type = DEV_X8;
+ break;
+ case 0:
+ type = DEV_X4;
+ break;
+ }
+
+ return type;
+}
+
+static enum dev_type ibridge_get_width(struct sbridge_pvt *pvt, u32 mtr)
+{
+ /*
+ * ddr3_width on the documentation but also valid for DDR4 on
+ * Haswell
+ */
+ return __ibridge_get_width(GET_BITFIELD(mtr, 7, 8));
+}
+
+static enum dev_type broadwell_get_width(struct sbridge_pvt *pvt, u32 mtr)
+{
+ /* ddr3_width on the documentation but also valid for DDR4 */
+ return __ibridge_get_width(GET_BITFIELD(mtr, 8, 9));
+}
+