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authorHeiko Schocher <hs@denx.de>2013-08-19 16:38:59 +0200
committerTom Rini <trini@ti.com>2013-08-28 11:44:59 -0400
commit988ea355018a7060768b8e6ddcee1ffa7cf6351b (patch)
treed0365fe702b63da442ff038c8f54029cd0ca1bf0 /arch
parenta09f96498bb2a31bb78388b5f094dc0e9295f86e (diff)
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arm, am335x: add watchdog support
Add TI OMAP 16xx & 24xx/34xx 32KHz (non-secure) watchdog support. Signed-off-by: Heiko Schocher <hs@denx.de> Reviewed-by: Tom Rini <trini@ti.com> Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/include/asm/arch-am33xx/cpu.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-am33xx/cpu.h b/arch/arm/include/asm/arch-am33xx/cpu.h
index 1835c89..73e6db8 100644
--- 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 {