[U-Boot] [PATCH V3 1/1] mx31/mx35/mx51/mx53/mx6: add watchdog

[Stefano Babic <sbabic@denx.de>]

Am 23/10/2012 03:19, schrieb Troy Kisky:
> Use a common watchdog driver for all these cpus.
> 
> Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
> 
> ---

Hi Troy,


> +++ b/doc/README.watchdog
> @@ -0,0 +1,29 @@
> +Watchdog driver general info
> +
> +CONFIG_HW_WATCHDOG
> +	This enables hw_watchdog_reset to be called during various loops,
> +	including waiting for a character on a serial port. But it
> +	does not also call hw_watchdog_init. Boards which want this
> +	enabled must call this function in their board file. This split
> +	is useful because some rom's enable the watchdog when downloading
> +	new code, so it must be serviced, but the board would rather it
> +	was off. And, it cannot always be turned off once on.
> +
> +CONFIG_WATCHDOG_TIMEOUT_MSECS
> +	Can be used to change the timeout for i.mx31/35/5x/6x.
> +	If not given, will default to maximum timeout. This would
> +	be 128000 msec for i.mx31/35/5x/6x.
> +
> +CONFIG_AT91SAM9_WATCHDOG
> +	Available for AT91SAM9 to service the watchdog.
> +
> +CONFIG_FTWDT010_WATCHDOG
> +	Available for FTWDT010 to service the watchdog.
> +
> +CONFIG_FTWDT010_HW_TIMEOUT
> +	Can be used to change the timeout for FTWDT010.
> +
> +CONFIG_IMX_WATCHDOG
> +	Available for i.mx31/35/5x/6x to service the watchdog. This is not
> +	automatically set because some boards (vision2) still need to define
> +	their own hw_watchdog_reset routine.

Thanks for documenting also not i.MX drivers.

> diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
> index 5579bf2..18768b7 100644
> --- a/drivers/watchdog/Makefile
> +++ b/drivers/watchdog/Makefile
> @@ -27,6 +27,9 @@ LIB	:= $(obj)libwatchdog.o
>  
>  COBJS-$(CONFIG_AT91SAM9_WATCHDOG) += at91sam9_wdt.o
>  COBJS-$(CONFIG_FTWDT010_WATCHDOG) += ftwdt010_wdt.o
> +ifneq (,$(filter $(SOC), mx31 mx35 mx5 mx6))
> +COBJS-y += imx_watchdog.o
> +endif

IMHO I like this solution, also if this driver is always compiled
independently if CONFIG_IMX_WATCHDOG is set, so to link the reset()
function. In any case, there is not a bigger footprint because you
protect watchdog code with the switch. Here my:

Acked-by: Stefano Babic <sbabic@denx.de>

I will just wait a bit for further comment before merging.

Best regards,
Stefano Babic



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