net: gem: Add OF initialization support

Gem can be directly initialized from DTB.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

drivers/net/zynq_gem.c

@@ -12,6 +12,8 @@
 #include <common.h>
 #include <net.h>
 #include <config.h>
+#include <fdtdec.h>
+#include <libfdt.h>
 #include <malloc.h>
 #include <asm/io.h>
 #include <phy.h>
@@ -534,3 +536,43 @@ int zynq_gem_initialize(bd_t *bis, int base_addr, int phy_addr, u32 emio)
 
 	return 1;
 }
+
+#ifdef CONFIG_OF_CONTROL
+int zynq_gem_of_init(const void *blob)
+{
+	int offset = 0;
+	u32 ret = 0;
+	u32 reg, phy_reg;
+
+	debug("ZYNQ GEM: Initialization\n");
+
+	do {
+		offset = fdt_node_offset_by_compatible(blob, offset,
+					"xlnx,ps7-ethernet-1.00.a");
+		if (offset != -1) {
+			reg = fdtdec_get_addr(blob, offset, "reg");
+			if (reg != FDT_ADDR_T_NONE) {
+				offset = fdtdec_lookup_phandle(blob, offset,
+							       "phy-handle");
+				if (offset != -1)
+					phy_reg = fdtdec_get_addr(blob, offset,
+								  "reg");
+				else
+					phy_reg = 0;
+
+				debug("ZYNQ GEM: addr %x, phyaddr %x\n",
+				      reg, phy_reg);
+
+				ret |= zynq_gem_initialize(NULL, reg,
+							   phy_reg, 0);
+
+			} else {
+				debug("ZYNQ GEM: Can't get base address\n");
+				return -1;
+			}
+		}
+	} while (offset != -1);
+
+	return ret;
+}
+#endif

include/netdev.h

@@ -91,6 +91,7 @@ int xilinx_emaclite_initialize(bd_t *bis, unsigned long base_addr,
 							int txpp, int rxpp);
 int xilinx_ll_temac_eth_init(bd_t *bis, unsigned long base_addr, int flags,
 						unsigned long ctrl_addr);
+int zynq_gem_of_init(const void *blob);
 int zynq_gem_initialize(bd_t *bis, int base_addr, int phy_addr, u32 emio);
 /*
  * As long as the Xilinx xps_ll_temac ethernet driver has not its own interface