83xx/fdt_support: let user specifiy FSL USB Dual-Role controller role

Linux understands "host" (default), "peripheral" and "otg" (broken).
Though, U-Boot doesn't restrict dr_mode variable to these values (think
of renames in future).

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>

board/freescale/mpc837xerdb/mpc837xerdb.c

@@ -197,5 +197,6 @@ void ft_board_setup(void *blob, bd_t *bd)
 	ft_pci_setup(blob, bd);
 #endif
 	ft_cpu_setup(blob, bd);
+	fdt_fixup_dr_usb(blob, bd);
 }
 #endif /* CONFIG_OF_BOARD_SETUP */

common/fdt_support.c

@@ -422,3 +422,28 @@ void fdt_fixup_ethernet(void *fdt, bd_t *bd)
 	}
 }
 #endif
+
+#ifdef CONFIG_HAS_FSL_DR_USB
+void fdt_fixup_dr_usb(void *blob, bd_t *bd)
+{
+	char *mode;
+	const char *compat = "fsl-usb2-dr";
+	const char *prop = "dr_mode";
+	int node_offset;
+	int err;
+
+	mode = getenv("usb_dr_mode");
+	if (!mode)
+		return;
+
+	node_offset = fdt_node_offset_by_compatible(blob, 0, compat);
+	if (node_offset < 0)
+		printf("WARNING: could not find compatible node %s: %s.\n",
+			compat, fdt_strerror(node_offset));
+
+	err = fdt_setprop(blob, node_offset, prop, mode, strlen(mode) + 1);
+	if (err < 0)
+		printf("WARNING: could not set %s for %s: %s.\n",
+		       prop, compat, fdt_strerror(err));
+}
+#endif /* CONFIG_HAS_FSL_DR_USB */

include/configs/MPC837XERDB.h

@@ -591,6 +591,8 @@
 #define CONFIG_ETH1ADDR		00:04:9f:ef:04:02
 #endif
 
+#define CONFIG_HAS_FSL_DR_USB
+
 #define CONFIG_IPADDR		10.0.0.2
 #define CONFIG_SERVERIP		10.0.0.1
 #define CONFIG_GATEWAYIP	10.0.0.1

include/fdt_support.h

@@ -50,6 +50,12 @@ int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
 			 const void *val, int len, int create);
 void fdt_fixup_qe_firmware(void *fdt);
 
+#ifdef CONFIG_HAS_FSL_DR_USB
+void fdt_fixup_dr_usb(void *blob, bd_t *bd);
+#else
+static inline void fdt_fixup_dr_usb(void *blob, bd_t *bd) {}
+#endif /* CONFIG_HAS_FSL_DR_USB */
+
 #ifdef CONFIG_OF_BOARD_SETUP
 void ft_board_setup(void *blob, bd_t *bd);
 void ft_cpu_setup(void *blob, bd_t *bd);