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authorGabor Juhos <juhosg@openwrt.org>2011-01-26 20:48:46 +0000
committerGabor Juhos <juhosg@openwrt.org>2011-01-26 20:48:46 +0000
commit42e36cf732dae513ad211775947d9c8616735e81 (patch)
tree54c2df2424c8faa01fac34ea7b2e9e24e90b264f /target/linux
parent16366feafb3e5df1878d2651ab8bffbec2cca7bc (diff)
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ramips: add watchdog device for RT305x
SVN-Revision: 25127
Diffstat (limited to 'target/linux')
-rw-r--r--target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt305x_regs.h5
-rw-r--r--target/linux/ramips/files/arch/mips/ralink/rt305x/devices.c28
-rw-r--r--target/linux/ramips/files/arch/mips/ralink/rt305x/devices.h1
3 files changed, 34 insertions, 0 deletions
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
--- 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
--- 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
--- 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 */