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

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@googlemail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
zero-colors
Martin Blumenstingl 2017-07-12 00:14:38 +02:00 committed by Wim Van Sebroeck
parent 08b10b57d6
commit 43a64e81b2
2 changed files with 7 additions and 1 deletions
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6
Documentation/devicetree/bindings/watchdog/meson-wdt.txt
View File

@ -2,7 +2,11 @@ Meson SoCs Watchdog timer
Required properties:
- compatible : should be "amlogic,meson6-wdt" or "amlogic,meson8b-wdt"
- compatible : depending on the SoC this should be one of:
"amlogic,meson6-wdt" on Meson6 SoCs
"amlogic,meson8-wdt" and "amlogic,meson6-wdt" on Meson8 SoCs
"amlogic,meson8b-wdt" on Meson8b SoCs
"amlogic,meson8m2-wdt" and "amlogic,meson8b-wdt" on Meson8m2 SoCs
- reg : Specifies base physical address and size of the registers.
Example:

2
drivers/watchdog/meson_wdt.c
View File

@ -155,7 +155,9 @@ static const struct watchdog_ops meson_wdt_ops = {
static const struct of_device_id meson_wdt_dt_ids[] = {
{ .compatible = "amlogic,meson6-wdt", .data = &meson6_wdt_data },
{ .compatible = "amlogic,meson8-wdt", .data = &meson6_wdt_data },
{ .compatible = "amlogic,meson8b-wdt", .data = &meson8b_wdt_data },
{ .compatible = "amlogic,meson8m2-wdt", .data = &meson8b_wdt_data },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, meson_wdt_dt_ids);