ramips: add watchdog device for RT288x

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@25129 3c298f89-4303-0410-b956-a3cf2f4a3e73

2 files changed, 29 insertions, 0 deletions

diff --git a/target/linux/ramips/files/arch/mips/ralink/rt288x/devices.c b/target/linux/ramips/files/arch/mips/ralink/rt288x/devices.c
index 6a5cf392e..fd6122f58 100644
--- a/target/linux/ramips/files/arch/mips/ralink/rt288x/devices.c
+++ b/target/linux/ramips/files/arch/mips/ralink/rt288x/devices.c
@@ -171,3 +171,30 @@ void __init rt288x_register_ethernet(void)
 
 	platform_device_register(&rt288x_eth_device);
 }
+
+static struct resource rt288x_wdt_resources[] = {
+	{
+		.start	= RT2880_TIMER_BASE,
+		.end	= RT2880_TIMER_BASE + RT2880_TIMER_SIZE - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+static struct platform_device rt288x_wdt_device = {
+	.name		= "ramips-wdt",
+	.id		= -1,
+	.resource	= rt288x_wdt_resources,
+	.num_resources	= ARRAY_SIZE(rt288x_wdt_resources),
+};
+
+void __init rt288x_register_wdt(void)
+{
+	u32 t;
+
+	/* enable WDT reset output on pin SRAM_CS_N */
+	t = rt288x_sysc_rr(SYSC_REG_CLKCFG);
+	t |= CLKCFG_SRAM_CS_N_WDT;
+	rt288x_sysc_wr(t, SYSC_REG_CLKCFG);
+
+	platform_device_register(&rt288x_wdt_device);
+}
diff --git a/target/linux/ramips/files/arch/mips/ralink/rt288x/devices.h b/target/linux/ramips/files/arch/mips/ralink/rt288x/devices.h
index 1ffbfb2a8..0df17368a 100644
--- a/target/linux/ramips/files/arch/mips/ralink/rt288x/devices.h
+++ b/target/linux/ramips/files/arch/mips/ralink/rt288x/devices.h
@@ -20,4 +20,6 @@ void rt288x_register_wifi(void);
 extern struct ramips_eth_platform_data rt288x_eth_data;
 void rt288x_register_ethernet(void);
 
+void rt288x_register_wdt(void);
+
 #endif  /* __ASM_MACH_RT288X_PLATFORM_H */