[U-Boot] [PATCH][v2] qoriq/p1_p2_rdb: USB device-tree fixups for P1020

[Ramneek Mehresh]

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 at freescale.com>
---
Changes for v2:
	- Incorporated Wolfgang's comments
	- rebased patch on http://git.denx.de/u-boot.git
	- top commit:
                commit 264eaa0ea967bac32214b87d60cfc86c8b22cac6
                Author: Valentin Longchamp <valentin.longchamp at keymile.com>
                Date:   Wed May 4 01:47:33 2011 +0000

 board/freescale/p1_p2_rdb/p1_p2_rdb.c |   47 +++++++++++++++++++++++++++++++++
 1 files changed, 47 insertions(+), 0 deletions(-)

diff --git a/board/freescale/p1_p2_rdb/p1_p2_rdb.c b/board/freescale/p1_p2_rdb/p1_p2_rdb.c
index d66b130..514e55d 100644
--- a/board/freescale/p1_p2_rdb/p1_p2_rdb.c
+++ b/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 off, 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";
+		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
-- 
1.6.1