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arm, am335x: add watchdog support

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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>
This commit is contained in:
Heiko Schocher
2013-08-19 16:38:59 +02:00
committed by Tom Rini
parent a09f96498b
commit 988ea35501
3 changed files with 142 additions and 0 deletions
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20
arch/arm/include/asm/arch-am33xx/cpu.h
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@@ -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 {