+#define DWC3_GSBUSCFG0 0xc100
+#define DWC3_GSBUSCFG0_CACHETYPE_SHIFT 16
+#define DWC3_GSBUSCFG0_CACHETYPE(n) (((n) & 0xffff) \
+ << DWC3_GSBUSCFG0_CACHETYPE_SHIFT)
+
+static void enable_dwc3_snooping(void)
+{
+ static const char * const compatibles[] = {
+ "fsl,layerscape-dwc3",
+ "fsl,ls1028a-dwc3",
+ };
+ fdt_addr_t dwc3_base;
+ ofnode node;
+ u32 val;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(compatibles); i++) {
+ ofnode_for_each_compatible_node(node, compatibles[i]) {
+ dwc3_base = ofnode_get_addr(node);
+ if (dwc3_base == FDT_ADDR_T_NONE)
+ continue;
+
+ val = in_le32(dwc3_base + DWC3_GSBUSCFG0);
+ val &= ~DWC3_GSBUSCFG0_CACHETYPE(~0);
+ val |= DWC3_GSBUSCFG0_CACHETYPE(0x2222);
+ writel(val, dwc3_base + DWC3_GSBUSCFG0);
+ }
+ }
+}
+