[PATCH v5 1/2] watchdog: imx2_wdt: add external reset support via dt prop

On 04/07/2016 09:09 PM, Guenter Roeck wrote:

On 04/01/2016 08:16 AM, Tim Harvey wrote:

quoted

The IMX6 watchdog supports assertion of a signal (WDOG_B) which
can be pinmux'd to an external pin. This is typically used for boards
that
have PMIC's in control of the IMX6 power rails. In fact, failure to use
such an external reset on boards with external PMIC's can result in
various
hangs due to the IMX6 not being fully reset [1] as well as the board
failing
to reset because its PMIC has not been reset to provide adequate
voltage for
the CPU when coming out of reset at 800Mhz.

This uses a new device-tree property 'fsl,ext-reset-output' to
indicate the
board has such a reset and to cause the watchdog to be configured to
assert
WDOG_B instead of an internal reset both on a watchdog timeout and in
system_restart.

[1]
http://lists.infradead.org/pipermail/linux-arm-kernel/2015-March/333689.html


Cc: Fabio Estevam <festevam@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Stefan Roese <sr@denx.de>
Cc: Iain Paton <redacted>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Akshay Bhat <redacted>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Shawn Guo <redacted>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

Hi Wim,

When will this patch be applied to the watchdog maintainers git tree? I 
have another board that can use this feature and I am guessing I should 
wait before for the above patch to be applied before submitting mine.

Thanks,
Akshay