Hi again Prafulla and the list!
On Mon, 28 Sep 2009 09:06:26 +0200
Simon Kagstrom <simon.kagst...@netinsight.net> wrote:
> Initialize by calling kw_watchdog_init() with the number of seconds for
> the watchdog to timeout.
>
> Signed-off-by: Simon Kagstrom <simon.kagst...@netinsight.net>
Were there any particular problems with this patch that I should
rework? It's not enabled by default.
// Simon
> ---
> 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 */
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