sh: urquell: Add board comment

Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/boards/board-urquell.c

@@ -2,6 +2,8 @@
  * Renesas Technology Corp. SH7786 Urquell Support.
  *
  * Copyright (C) 2008  Kuninori Morimoto <morimoto.kuninori@renesas.com>
+ *
+ * Based on board-sh7785lcr.c
  * Copyright (C) 2008  Yoshihiro Shimoda
  *
  * This file is subject to the terms and conditions of the GNU General Public
@@ -21,6 +23,29 @@
 #include <asm/heartbeat.h>
 #include <asm/sizes.h>
 
+/* SWx  8765 4321
+ *----------------------------
+ * SW1  1101 0010  -> Pck 66MHz version
+ *     (0101 0010)    Pck 33MHz version (check CS1BCR)
+ * SW2  xxxx x1x0  -> little endian
+ *                    29bit mode
+ * SW47 0001 1000  -> CS0 : nor flash
+ *                    CS1 : SRAM, registers, LAN, PCMCIA
+ *                    38400 bps
+ *
+ * Address
+ * 0x00000000     Nor Flash
+ * 0x04000000     SRAM
+ * 0x05000000     FPGA register
+ * 0x05800000     LAN91C111
+ * 0x06000000     PCMCIA
+ * 0x10000000     PCIe
+ * 0x14000000     LRAM/URAM
+ * 0x18000000     ATA/NAND-Flash
+ * 0x1C000000     SH7786 Control register
+ */
+
+/* HeartBeat */
 static struct resource heartbeat_resources[] = {
 	[0] = {
 		.start	= BOARDREG(SLEDR),
@@ -43,6 +68,7 @@ static struct platform_device heartbeat_device = {
 	.resource	= heartbeat_resources,
 };
 
+/* LAN91C111 */
 static struct smc91x_platdata smc91x_info = {
 	.flags = SMC91X_USE_16BIT | SMC91X_NOWAIT,
 };
@@ -69,6 +95,7 @@ static struct platform_device smc91x_eth_device = {
 	},
 };
 
+/* Nor Flash */
 static struct mtd_partition nor_flash_partitions[] = {
 	{
 		.name		= "loader",