usb: UniPhier: support OF configuration

If CONFIG_OF_CONTROL is defined, search device tree nodes that are
compatible with "panasonic,uniphier-ehci" and take the base address
from their "reg" property.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Marek Vasut <marex@denx.de>

1 files changed, 37 insertions, 1 deletions

diff --git a/drivers/usb/host/ehci-uniphier.c b/drivers/usb/host/ehci-uniphier.c
index 77f6c9d..32a4375 100644
--- a/drivers/usb/host/ehci-uniphier.c
+++ b/drivers/usb/host/ehci-uniphier.c
@@ -6,10 +6,43 @@
  */
 
 #include <common.h>
+#include <linux/err.h>
 #include <usb.h>
 #include <asm/arch/ehci-uniphier.h>
 #include "ehci.h"
 
+#ifdef CONFIG_OF_CONTROL
+#include <fdtdec.h>
+DECLARE_GLOBAL_DATA_PTR;
+
+#define FDT		gd->fdt_blob
+#define COMPAT		"panasonic,uniphier-ehci"
+
+static int get_uniphier_ehci_base(int index, struct ehci_hccr **base)
+{
+	int offset;
+
+	for (offset = fdt_node_offset_by_compatible(FDT, 0, COMPAT);
+	     offset >= 0;
+	     offset = fdt_node_offset_by_compatible(FDT, offset, COMPAT)) {
+		if (index == 0) {
+			*base = (struct ehci_hccr *)
+					fdtdec_get_addr(FDT, offset, "reg");
+			return 0;
+		}
+		index--;
+	}
+
+	return -ENODEV; /* not found */
+}
+#else
+static int get_uniphier_ehci_base(int index, struct ehci_hccr **base)
+{
+	*base = (struct ehci_hccr *)uniphier_ehci_platdata[index].base;
+	return 0;
+}
+#endif
+
 /*
  * Create the appropriate control structures to manage
  * a new EHCI host controller.
@@ -17,12 +50,15 @@
 int ehci_hcd_init(int index, enum usb_init_type init, struct ehci_hccr **hccr,
 		  struct ehci_hcor **hcor)
 {
+	int ret;
 	struct ehci_hccr *cr;
 	struct ehci_hcor *or;
 
 	uniphier_ehci_reset(index, 0);
 
-	cr = (struct ehci_hccr *)(uniphier_ehci_platdata[index].base);
+	ret = get_uniphier_ehci_base(index, &cr);
+	if (ret < 0)
+		return ret;
 	or = (void *)cr + HC_LENGTH(ehci_readl(&cr->cr_capbase));
 
 	*hccr = cr;