arm, am335x: add watchdog support

[u-boot] / arch / arm / include / asm / arch-am33xx / cpu.h

diff --git a/arch/arm/include/asm/arch-am33xx/cpu.h b/arch/arm/include/asm/arch-am33xx/cpu.h
index 1835c8939b982c564595c45a0dd5628e07db396f..73e6db89984584850f988decb9b7dc9038065d35 100644 (file)
--- a/arch/arm/include/asm/arch-am33xx/cpu.h
+++ b/arch/arm/include/asm/arch-am33xx/cpu.h
@@ -46,6 +46,26 @@
 #define PRM_RSTCTRL_RESET              0x01
 #define PRM_RSTST_WARM_RESET_MASK      0x232
 
+/*
+ * Watchdog:
+ * Using the prescaler, the OMAP watchdog could go for many
+ * months before firing.  These limits work without scaling,
+ * with the 60 second default assumed by most tools and docs.
+ */
+#define TIMER_MARGIN_MAX       (24 * 60 * 60)  /* 1 day */
+#define TIMER_MARGIN_DEFAULT   60      /* 60 secs */
+#define TIMER_MARGIN_MIN       1
+
+#define PTV                    0       /* prescale */
+#define GET_WLDR_VAL(secs)     (0xffffffff - ((secs) * (32768/(1<<PTV))) + 1)
+#define WDT_WWPS_PEND_WCLR     BIT(0)
+#define WDT_WWPS_PEND_WLDR     BIT(2)
+#define WDT_WWPS_PEND_WTGR     BIT(3)
+#define WDT_WWPS_PEND_WSPR     BIT(4)
+
+#define WDT_WCLR_PRE           BIT(5)
+#define WDT_WCLR_PTV_OFF       2
+
 #ifndef __KERNEL_STRICT_NAMES
 #ifndef __ASSEMBLY__
 struct gpmc_cs {