armv8: layerscape: Enable EHCI access for LS1012A

Program Central Security Unit (CSU) to grant access to USB 2.0
controller.

Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
[YS: rewrite commit message]
Reviewed-by: York Sun <york.sun@nxp.com>

arch/arm/cpu/armv8/fsl-layerscape/soc.c

@@ -11,6 +11,7 @@
 #include <asm/io.h>
 #include <asm/global_data.h>
 #include <asm/arch-fsl-layerscape/config.h>
+#include <asm/arch-fsl-layerscape/ns_access.h>
 #include <asm/arch-fsl-layerscape/fsl_icid.h>
 #ifdef CONFIG_LAYERSCAPE_NS_ACCESS
 #include <fsl_csu.h>
@@ -615,6 +616,14 @@ void fsl_lsch2_early_init_f(void)
 			 CCI400_DVM_MESSAGE_REQ_EN | CCI400_SNOOP_REQ_EN);
 	}
 
+	/*
+	 * Program Central Security Unit (CSU) to grant access
+	 * permission for USB 2.0 controller
+	 */
+#if defined(CONFIG_ARCH_LS1012A) && defined(CONFIG_USB_EHCI_FSL)
+	if (current_el() == 3)
+		set_devices_ns_access(CSU_CSLX_USB_2, CSU_ALL_RW);
+#endif
 	/* Erratum */
 	erratum_a008850_early(); /* part 1 of 2 */
 	erratum_a009929();

arch/arm/include/asm/arch-fsl-layerscape/ns_access.h

@@ -39,6 +39,7 @@ enum csu_cslx_ind {
 	CSU_CSLX_ESDHC,
 	CSU_CSLX_IFC = 45,
 	CSU_CSLX_I2C1,
+	CSU_CSLX_USB_2,
 	CSU_CSLX_I2C3 = 48,
 	CSU_CSLX_I2C2,
 	CSU_CSLX_DUART2 = 50,