[PATCH] watchdog: meson-wdt: add support for the watchdog on Meson8 and Meson8m2

[Martin Blumenstingl]

On Thu, Jun 15, 2017 at 7:25 PM, Guenter Roeck <linux at roeck-us.net> wrote:
> On Sun, Jun 11, 2017 at 11:52:19AM +0200, Martin Blumenstingl wrote:
>> The watchdog IP block on Meson8 and Meson8m2 is already supported by the
>> existing meson-wdt driver. Meson8 uses the same register bits as Meson6,
>> while the newer Meson8m2 SoC uses the same register bits as Meson8b.
>>
>> Currently watchdog support on Meson8 SoC already works because
>> meson8.dtsi simply uses the "amlogic,meson6-wdt" compatible. Adding a
>> separate compatible for Meson8 makes this more explicit though.
>>
>> Signed-off-by: Martin Blumenstingl <martin.blumenstingl at googlemail.com>
>
> Reviewed-by: Guenter Roeck <linux at roeck-us.net>
thank you!
is there anything holding you up from taking this patch (for example:
are you still missing any specific Signed-off-by / Acked-by)?

> In general, changes like this are not necessary, though. The dts file
> is supposed to reference both generic and specific compatible strings.
I thought about skipping this patch, but I find that it looks strange without.

the hierarchy and the corresponding compatible strings would be:
meson.dtsi / compatible = "amlogic,meson6-wdt";
|- meson8.dtsi / compatible = "amlogic,meson8-wdt", "amlogic,meson6-wdt";
   |- meson8m2.dtsi (upcoming) / compatible = "amlogic,meson8m2-wdt",
"amlogic,meson8b-wdt";
|- meson8b.dtsi / compatible = "amlogic,meson8b-wdt";

instead of this seemingly random mixup of compatible strings I decided
to introduce separate ones for each SoC.

Martin