diff --git a/drivers/iommu/omap-iommu.h b/drivers/iommu/omap-iommu.h
index a656df2..59628e5 100644
--- a/drivers/iommu/omap-iommu.h
+++ b/drivers/iommu/omap-iommu.h
@@ -30,6 +30,7 @@
 struct omap_iommu {
 	const char	*name;
 	void __iomem	*regbase;
+	struct regmap	*syscfg;
 	struct device	*dev;
 	struct iommu_domain *domain;
 	struct dentry	*debug_dir;
@@ -48,6 +49,7 @@
 	void *ctx; /* iommu context: registres saved area */
 
 	int has_bus_err_back;
+	u32 id;
 };
 
 struct cr_regs {
@@ -159,6 +161,13 @@
 	 ((pgsz) == MMU_CAM_PGSZ_4K)  ? 0xfffff000 : 0)
 
 /*
+ * DSP_SYSTEM registers and bit definitions (applicable only for DRA7xx DSP)
+ */
+#define DSP_SYS_REVISION		0x00
+#define DSP_SYS_MMU_CONFIG		0x18
+#define DSP_SYS_MMU_CONFIG_EN_SHIFT	4
+
+/*
  * utilities for super page(16MB, 1MB, 64KB and 4KB)
  */