qoriq/p1_p2_rdb: USB device-tree fixups for P1020

Resolve P1020 second USB controller multiplexing with eLBC
	- mandatory to mention USB2 in hwconfig string to select it
	  over eLBC, otherwise USB2 node is removed
	- works only for SPI and SD boot

Signed-off-by: Ramneek Mehresh <ramneek.mehresh@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

board/freescale/p1_p2_rdb/p1_p2_rdb.c

@@ -37,6 +37,7 @@
 #include <netdev.h>
 #include <rtc.h>
 #include <i2c.h>
+#include <hwconfig.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -247,6 +248,8 @@ extern void ft_pci_board_setup(void *blob);
 
 void ft_board_setup(void *blob, bd_t *bd)
 {
+	const char *soc_usb_compat = "fsl-usb2-dr";
+	int err, usb1_off, usb2_off;
 	phys_addr_t base;
 	phys_size_t size;
 
@@ -260,5 +263,49 @@ void ft_board_setup(void *blob, bd_t *bd)
 #endif /* #if defined(CONFIG_PCI) */
 
 	fdt_fixup_memory(blob, (u64)base, (u64)size);
+
+	fdt_fixup_dr_usb(blob, bd);
+
+#if defined(CONFIG_SDCARD) || defined(CONFIG_SPIFLASH)
+	/* Delete eLBC node as it is muxed with USB2 controller */
+	if (hwconfig("usb2")) {
+		const char *soc_elbc_compat = "fsl,p1020-elbc";
+		int off = fdt_node_offset_by_compatible(blob, -1,
+			soc_elbc_compat);
+		if (off < 0) {
+			printf("WARNING: could not find compatible node"
+				" %s: %s.\n", soc_elbc_compat,
+				fdt_strerror(off));
+				return;
+		}
+		err = fdt_del_node(blob, off);
+		if (err < 0) {
+			printf("WARNING: could not remove %s: %s.\n",
+				soc_elbc_compat, fdt_strerror(err));
+		}
+		return;
+	}
+#endif
+	/* Delete USB2 node as it is muxed with eLBC */
+	usb1_off = fdt_node_offset_by_compatible(blob, -1,
+		soc_usb_compat);
+	if (usb1_off < 0) {
+		printf("WARNING: could not find compatible node"
+			" %s: %s.\n", soc_usb_compat,
+			fdt_strerror(usb1_off));
+		return;
+	}
+	usb2_off = fdt_node_offset_by_compatible(blob, usb1_off,
+			soc_usb_compat);
+	if (usb2_off < 0) {
+		printf("WARNING: could not find compatible node"
+			" %s: %s.\n", soc_usb_compat,
+			fdt_strerror(usb2_off));
+		return;
+	}
+	err = fdt_del_node(blob, usb2_off);
+	if (err < 0)
+		printf("WARNING: could not remove %s: %s.\n",
+			soc_usb_compat, fdt_strerror(err));
 }
 #endif