ramips: add watchdog device for RT305x

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@25127 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt305x_regs.h b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt305x_regs.h
index 6e7b9e8..c4964b0 100644 (file)
--- a/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt305x_regs.h
+++ b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt305x_regs.h
@@ -62,6 +62,11 @@
 #define SYSTEM_CONFIG_CPUCLK_MASK      0x1
 #define SYSTEM_CONFIG_CPUCLK_320       0x0
 #define SYSTEM_CONFIG_CPUCLK_384       0x1
+#define SYSTEM_CONFIG_SRAM_CS0_MODE_SHIFT      2
+#define SYSTEM_CONFIG_SRAM_CS0_MODE_MASK       0x3
+#define SYSTEM_CONFIG_SRAM_CS0_MODE_NORMAL     0
+#define SYSTEM_CONFIG_SRAM_CS0_MODE_WDT                1
+#define SYSTEM_CONFIG_SRAM_CS0_MODE_BTCOEX     2
 
 #define RT305X_GPIO_MODE_I2C           BIT(0)
 #define RT305X_GPIO_MODE_SPI           BIT(1)

diff --git a/target/linux/ramips/files/arch/mips/ralink/rt305x/devices.c b/target/linux/ramips/files/arch/mips/ralink/rt305x/devices.c
index 3936ee7..7d41b07 100644 (file)
--- a/target/linux/ramips/files/arch/mips/ralink/rt305x/devices.c
+++ b/target/linux/ramips/files/arch/mips/ralink/rt305x/devices.c
@@ -189,3 +189,31 @@ void __init rt305x_register_wifi(void)
 {
        platform_device_register(&rt305x_wifi_device);
 }
+
+static struct resource rt305x_wdt_resources[] = {
+       {
+               .start  = RT305X_TIMER_BASE,
+               .end    = RT305X_TIMER_BASE + RT305X_TIMER_SIZE - 1,
+               .flags  = IORESOURCE_MEM,
+       },
+};
+
+static struct platform_device rt305x_wdt_device = {
+       .name           = "ramips-wdt",
+       .id             = -1,
+       .resource       = rt305x_wdt_resources,
+       .num_resources  = ARRAY_SIZE(rt305x_wdt_resources),
+};
+
+void __init rt305x_register_wdt(void)
+{
+       u32 t;
+
+       /* enable WDT reset output on pin SRAM_CS_N */
+       t = rt305x_sysc_rr(SYSC_REG_SYSTEM_CONFIG);
+       t |= SYSTEM_CONFIG_SRAM_CS0_MODE_WDT <<
+            SYSTEM_CONFIG_SRAM_CS0_MODE_SHIFT;
+       rt305x_sysc_wr(t, SYSC_REG_SYSTEM_CONFIG);
+
+       platform_device_register(&rt305x_wdt_device);
+}

diff --git a/target/linux/ramips/files/arch/mips/ralink/rt305x/devices.h b/target/linux/ramips/files/arch/mips/ralink/rt305x/devices.h
index 31ef403..352243c 100644 (file)
--- a/target/linux/ramips/files/arch/mips/ralink/rt305x/devices.h
+++ b/target/linux/ramips/files/arch/mips/ralink/rt305x/devices.h
@@ -20,6 +20,7 @@ extern struct rt305x_esw_platform_data rt305x_esw_data;
 void rt305x_register_flash(unsigned int id, struct physmap_flash_data *pdata);
 void rt305x_register_ethernet(void);
 void rt305x_register_wifi(void);
+void rt305x_register_wdt(void);
 
 #endif  /* __RT305X_DEVICES_H */