Add WDT controller into alias field. After that, WDT index,
used to distinguish different WDT controllers in the driver,
can be gotten by using of_alias_get_id dts API.

Signed-off-by: Chin-Ting Kuo <chin-ting_kuo@aspeedtech.com>
---
 arch/arm/boot/dts/aspeed/aspeed-g4.dtsi | 2 ++
 arch/arm/boot/dts/aspeed/aspeed-g5.dtsi | 3 +++
 arch/arm/boot/dts/aspeed/aspeed-g6.dtsi | 4 ++++
 3 files changed, 9 insertions(+)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-g4.dtsi b/arch/arm/boot/dts/aspeed/aspeed-g4.dtsi
index 78c967812492..d8b4136d0ca0 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-g4.dtsi
+++ b/arch/arm/boot/dts/aspeed/aspeed-g4.dtsi
@@ -29,6 +29,8 @@ aliases {
 		serial3 = &uart4;
 		serial4 = &uart5;
 		serial5 = &vuart;
+		watchdog0 = &wdt1;
+		watchdog1 = &wdt2;
 	};
 
 	cpus {
diff --git a/arch/arm/boot/dts/aspeed/aspeed-g5.dtsi b/arch/arm/boot/dts/aspeed/aspeed-g5.dtsi
index 57a699a7c149..4dd220bca617 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-g5.dtsi
+++ b/arch/arm/boot/dts/aspeed/aspeed-g5.dtsi
@@ -30,6 +30,9 @@ aliases {
 		serial3 = &uart4;
 		serial4 = &uart5;
 		serial5 = &vuart;
+		watchdog0 = &wdt1;
+		watchdog1 = &wdt2;
+		watchdog2 = &wdt3;
 	};
 
 	cpus {
diff --git a/arch/arm/boot/dts/aspeed/aspeed-g6.dtsi b/arch/arm/boot/dts/aspeed/aspeed-g6.dtsi
index 8ed715bd53aa..c0a47c795fff 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-g6.dtsi
+++ b/arch/arm/boot/dts/aspeed/aspeed-g6.dtsi
@@ -40,6 +40,10 @@ aliases {
 		mdio1 = &mdio1;
 		mdio2 = &mdio2;
 		mdio3 = &mdio3;
+		watchdog0 = &wdt1;
+		watchdog1 = &wdt2;
+		watchdog2 = &wdt3;
+		watchdog3 = &wdt4;
 	};
 
 
-- 
2.34.1

On Mon, 2024-10-28 at 10:48 +0800, Chin-Ting Kuo wrote:
> Add WDT controller into alias field. After that, WDT index,
> used to distinguish different WDT controllers in the driver,
> can be gotten by using of_alias_get_id dts API.

I feel it would be less brittle if we encode the mapping in the driver?
Based on reg the driver can derive the watchdog index. That way there's
no constraint on how the platform architect arranges the aliases for
the watchdogs (if they define them at all).

Andrew