[PATCH 1/3] watchdog: imx2: Only i.MX35 and later have a WMCR register

[Fabio Estevam]

On Mon, Jan 9, 2017 at 7:50 AM, Uwe Kleine-König
<u.kleine-koenig at pengutronix.de> wrote:
> Commit 5fe65ce7ccbb ("watchdog: imx2_wdt: Disable power down counter on
> boot") introduced a write to the WMCR register that doesn't exist on
> i.MX21, i.MX27 and i.MX31 and so makes the SoC hang during probe.
>
> So teach the driver to differentiate between these two types. Note that
> this effectively undoes commit 5fe65ce7ccbb for machines using dt until
> their dtb is updated accordingly. This is critical iff the bootloader
> doesn't disable the power down counter and the #WDOG signal actually
> does something to the machine.
>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>

Reviewed-by: Fabio Estevam <fabio.estevam at nxp.com>