Initialize by calling kw_watchdog_init() with the number of seconds for the watchdog to timeout.
Signed-off-by: Simon Kagstrom simon.kagstrom@netinsight.net --- cpu/arm926ejs/kirkwood/timer.c | 29 +++++++++++++++++++++++++++++ include/asm-arm/arch-kirkwood/cpu.h | 2 ++ 2 files changed, 31 insertions(+), 0 deletions(-)
diff --git a/cpu/arm926ejs/kirkwood/timer.c b/cpu/arm926ejs/kirkwood/timer.c index 817ff42..f3397e7 100644 --- a/cpu/arm926ejs/kirkwood/timer.c +++ b/cpu/arm926ejs/kirkwood/timer.c @@ -25,6 +25,7 @@ #include <asm/arch/kirkwood.h>
#define UBOOT_CNTR 0 /* counter to use for uboot timer */ +#define WATCHDOG_CNTR 2
/* Timer reload and current value registers */ struct kwtmr_val { @@ -166,3 +167,31 @@ int timer_init(void)
return 0; } + +#if defined(CONFIG_HW_WATCHDOG) +static unsigned long watchdog_timeout = 5; +void hw_watchdog_reset(void) +{ + unsigned long time = CONFIG_SYS_TCLK * watchdog_timeout; + + writel(time, CNTMR_VAL_REG(WATCHDOG_CNTR)); +} + +void kw_watchdog_init(unsigned long timeout_secs) +{ + struct kwcpu_registers *cpureg = + (struct kwcpu_registers *)KW_CPU_REG_BASE; + unsigned int cntmrctrl; + + watchdog_timeout = timeout_secs; + /* Enable CPU reset if watchdog expires */ + cpureg->rstoutn_mask |= WATCHDOG_CNTR; + hw_watchdog_reset(); + + /* Enable the watchdog */ + cntmrctrl = readl(CNTMR_CTRL_REG); + cntmrctrl |= CTCR_ARM_TIMER_EN(WATCHDOG_CNTR); + cntmrctrl |= CTCR_ARM_TIMER_AUTO_EN(WATCHDOG_CNTR); + writel(cntmrctrl, CNTMR_CTRL_REG); +} +#endif diff --git a/include/asm-arm/arch-kirkwood/cpu.h b/include/asm-arm/arch-kirkwood/cpu.h index b3022a3..df49c3f 100644 --- a/include/asm-arm/arch-kirkwood/cpu.h +++ b/include/asm-arm/arch-kirkwood/cpu.h @@ -165,5 +165,7 @@ int kw_config_mpp(unsigned int mpp0_7, unsigned int mpp8_15, unsigned int mpp32_39, unsigned int mpp40_47, unsigned int mpp48_55); unsigned int kw_winctrl_calcsize(unsigned int sizeval); +void kw_watchdog_init(unsigned long timeout_secs); + #endif /* __ASSEMBLY__ */ #endif /* _KWCPU_H */