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-rw-r--r--arch/arm/cpu/arm1136/mx31/timer.c38
-rw-r--r--arch/arm/include/asm/arch-mx31/mx31-regs.h10
2 files changed, 47 insertions, 1 deletions
diff --git a/arch/arm/cpu/arm1136/mx31/timer.c b/arch/arm/cpu/arm1136/mx31/timer.c
index f6be3b94a4..27c340fd9e 100644
--- a/arch/arm/cpu/arm1136/mx31/timer.c
+++ b/arch/arm/cpu/arm1136/mx31/timer.c
@@ -24,6 +24,8 @@
#include <common.h>
#include <asm/arch/mx31-regs.h>
#include <div64.h>
+#include <watchdog.h>
+#include <asm/io.h>
#define TIMER_BASE 0x53f90000 /* General purpose timer 1 */
@@ -165,5 +167,39 @@ void __udelay (unsigned long usec)
void reset_cpu (ulong addr)
{
- __REG16(WDOG_BASE) = 4;
+ struct wdog_regs *wdog = (struct wdog_regs *)WDOG_BASE;
+ wdog->wcr = WDOG_ENABLE;
+ while (1)
+ ;
}
+
+#ifdef CONFIG_HW_WATCHDOG
+void mxc_hw_watchdog_enable(void)
+{
+ struct wdog_regs *wdog = (struct wdog_regs *)WDOG_BASE;
+ u16 secs;
+
+ /*
+ * The timer watchdog can be set between
+ * 0.5 and 128 Seconds. If not defined
+ * in configuration file, sets 64 Seconds
+ */
+#ifdef CONFIG_SYS_WD_TIMER_SECS
+ secs = (CONFIG_SYS_WD_TIMER_SECS << 1) & 0xFF;
+ if (!secs) secs = 1;
+#else
+ secs = 64;
+#endif
+ writew(readw(&wdog->wcr) | (secs << WDOG_WT_SHIFT) | WDOG_ENABLE,
+ &wdog->wcr);
+}
+
+
+void mxc_hw_watchdog_reset(void)
+{
+ struct wdog_regs *wdog = (struct wdog_regs *)WDOG_BASE;
+
+ writew(0x5555, &wdog->wsr);
+ writew(0xAAAA, &wdog->wsr);
+}
+#endif
diff --git a/arch/arm/include/asm/arch-mx31/mx31-regs.h b/arch/arm/include/asm/arch-mx31/mx31-regs.h
index 105f7d8be5..37337f2877 100644
--- a/arch/arm/include/asm/arch-mx31/mx31-regs.h
+++ b/arch/arm/include/asm/arch-mx31/mx31-regs.h
@@ -75,6 +75,16 @@ struct cspi_regs {
u32 test;
};
+/* Watchdog Timer (WDOG) registers */
+#define WDOG_ENABLE (1 << 2)
+#define WDOG_WT_SHIFT 8
+struct wdog_regs {
+ u16 wcr; /* Control */
+ u16 wsr; /* Service */
+ u16 wrsr; /* Reset Status */
+};
+
+
#define IOMUX_PADNUM_MASK 0x1ff
#define IOMUX_PIN(gpionum, padnum) ((padnum) & IOMUX_PADNUM_MASK)