diff --git a/arch/arm/boot/dts/omap34xx.dtsi b/arch/arm/boot/dts/omap34xx.dtsi
index f572a477f74ca2a5c7d1538d9582fc6fc5202917..7b09cbee8bb8b515387c6f787c97324d0b410f98 100644
--- a/arch/arm/boot/dts/omap34xx.dtsi
+++ b/arch/arm/boot/dts/omap34xx.dtsi
@@ -100,6 +100,32 @@ smartreflex_mpu_iva: smartreflex@480c9000 {
 				interrupts = <18>;
 			};
 		};
+
+		/*
+		 * On omap34xx the OCP registers do not seem to be accessible
+		 * at all unlike on 36xx. Maybe SGX is permanently set to
+		 * "OCP bypass mode", or maybe there is OCP_SYSCONFIG that is
+		 * write-only at 0x50000e10. We detect SGX based on the SGX
+		 * revision register instead of the unreadable OCP revision
+		 * register. Also note that on early 34xx es1 revision there
+		 * are also different clocks, but we do not have any dts users
+		 * for it.
+		 */
+		sgx_module: target-module@50000000 {
+			compatible = "ti,sysc-omap2", "ti,sysc";
+			reg = <0x50000014 0x4>;
+			reg-names = "rev";
+			clocks = <&sgx_fck>, <&sgx_ick>;
+			clock-names = "fck", "ick";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0 0x50000000 0x4000>;
+
+			/*
+			 * Closed source PowerVR driver, no child device
+			 * binding or driver in mainline
+			 */
+		};
 	};
 
 	thermal_zones: thermal-zones {
diff --git a/arch/arm/boot/dts/omap36xx.dtsi b/arch/arm/boot/dts/omap36xx.dtsi
index 6fb23ada1f64dea9e6ad91701c78a5c2a50725d2..1e552f08f120ed2b1fc3966e9dec2aca83b783d3 100644
--- a/arch/arm/boot/dts/omap36xx.dtsi
+++ b/arch/arm/boot/dts/omap36xx.dtsi
@@ -139,6 +139,34 @@ smartreflex_mpu_iva: smartreflex@480c9000 {
 				interrupts = <18>;
 			};
 		};
+
+		/*
+		 * Note that the sysconfig register layout is a subset of the
+		 * "ti,sysc-omap4" type register with just sidle and midle bits
+		 * available while omap34xx has "ti,sysc-omap2" type sysconfig.
+		 */
+		sgx_module: target-module@50000000 {
+			compatible = "ti,sysc-omap4", "ti,sysc";
+			reg = <0x5000fe00 0x4>,
+			      <0x5000fe10 0x4>;
+			reg-names = "rev", "sysc";
+			ti,sysc-midle = <SYSC_IDLE_FORCE>,
+					<SYSC_IDLE_NO>,
+					<SYSC_IDLE_SMART>;
+			ti,sysc-sidle = <SYSC_IDLE_FORCE>,
+					<SYSC_IDLE_NO>,
+					<SYSC_IDLE_SMART>;
+			clocks = <&sgx_fck>, <&sgx_ick>;
+			clock-names = "fck", "ick";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0 0x50000000 0x2000000>;
+
+			/*
+			 * Closed source PowerVR driver, no child device
+			 * binding or driver in mainline
+			 */
+		};
 	};
 
 	thermal_zones: thermal-zones {