davinci: add platform support for watchdog timer

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

arch/arm/mach-davinci/clock.h

@@ -93,4 +93,7 @@ struct davinci_clk {
 	}
 
 int davinci_clk_init(struct davinci_clk *clocks);
+
+extern struct platform_device davinci_wdt_device;
+
 #endif

arch/arm/mach-davinci/devices.c

@@ -54,3 +54,38 @@ void __init davinci_init_i2c(struct davinci_i2c_platform_data *pdata)
 	(void) platform_device_register(&davinci_i2c_device);
 }
 
+/*-------------------------------------------------------------------------*/
+
+static struct resource wdt_resources[] = {
+	{
+		.start	= 0x01c21c00,
+		.end	= 0x01c21fff,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+struct platform_device davinci_wdt_device = {
+	.name		= "watchdog",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(wdt_resources),
+	.resource	= wdt_resources,
+};
+
+static void davinci_init_wdt(void)
+{
+	platform_device_register(&davinci_wdt_device);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int __init davinci_init_devices(void)
+{
+	/* please keep these calls, and their implementations above,
+	 * in alphabetical order so they're easier to sort through.
+	 */
+	davinci_init_wdt();
+
+	return 0;
+}
+arch_initcall(davinci_init_devices);
+

arch/arm/mach-davinci/time.c

@@ -19,6 +19,7 @@
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/device.h>
+#include <linux/platform_device.h>
 
 #include <mach/hardware.h>
 #include <asm/system.h>
@@ -349,15 +350,13 @@ struct sys_timer davinci_timer = {
 
 
 /* reset board using watchdog timer */
-void davinci_watchdog_reset(void) {
+void davinci_watchdog_reset(void)
+{
 	u32 tgcr, wdtcr;
 	void __iomem *base = IO_ADDRESS(DAVINCI_WDOG_BASE);
-	struct device dev;
 	struct clk *wd_clk;
-	char *name = "watchdog";
 
-	dev_set_name(&dev, name);
+	wd_clk = clk_get(&davinci_wdt_device.dev, NULL);
-	wd_clk = clk_get(&dev, NULL);
 	if (WARN_ON(IS_ERR(wd_clk)))
 		return;
 	clk_enable(wd_clk);