MIPS: AR7: Make board code register ar7_wdt as a platform device

This patch makes the board code register the ar7_wdt driver as a platform
device. We move the dynamic resource calculation here since the driver
should not be aware of the AR7 SoC version it is running on.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/ar7/platform.c

@@ -417,6 +417,20 @@ static struct platform_device ar7_udc = {
 	.num_resources = ARRAY_SIZE(usb_res),
 };
 
+static struct resource ar7_wdt_res = {
+	.name = "regs",
+	.start = -1, /* Filled at runtime */
+	.end = -1, /* Filled at runtime */
+	.flags = IORESOURCE_MEM,
+};
+
+static struct platform_device ar7_wdt = {
+	.id = -1,
+	.name  = "ar7_wdt",
+	.resource = &ar7_wdt_res,
+	.num_resources = 1,
+};
+
 static inline unsigned char char2hex(char h)
 {
 	switch (h) {
@@ -487,6 +501,7 @@ static void __init detect_leds(void)
 
 static int __init ar7_register_devices(void)
 {
+	u16 chip_id;
 	int res;
 #ifdef CONFIG_SERIAL_8250
 	static struct uart_port uart_port[2];
@@ -565,6 +580,23 @@ static int __init ar7_register_devices(void)
 
 	res = platform_device_register(&ar7_udc);
 
+	chip_id = ar7_chip_id();
+	switch (chip_id) {
+	case AR7_CHIP_7100:
+	case AR7_CHIP_7200:
+		ar7_wdt_res.start = AR7_REGS_WDT;
+		break;
+	case AR7_CHIP_7300:
+		ar7_wdt_res.start = UR8_REGS_WDT;
+		break;
+	default:
+		break;
+	}
+
+	ar7_wdt_res.end = ar7_wdt_res.start + 0x20;
+
+	res = platform_device_register(&ar7_wdt);
+
 	return res;
 }
 arch_initcall(ar7_register_devices);