From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Add `renesas,r9a09g057-syscon-wdt-errorrst` property to WDT node, to
determine whether the current boot resulted from a `Power-on Reset`
or a `Watchdog Reset`.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 arch/arm64/boot/dts/renesas/r9a09g057.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a09g057.dtsi b/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
index 69de6c302b17..44ec54569ce1 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
@@ -445,6 +445,7 @@ wdt0: watchdog@11c00400 {
 			clock-names = "pclk", "oscclk";
 			resets = <&cpg 0x75>;
 			power-domains = <&cpg>;
+			renesas,r9a09g057-syscon-wdt-errorrst = <&cpg 0xb40 0>;
 			status = "disabled";
 		};
 
@@ -455,6 +456,7 @@ wdt1: watchdog@14400000 {
 			clock-names = "pclk", "oscclk";
 			resets = <&cpg 0x76>;
 			power-domains = <&cpg>;
+			renesas,r9a09g057-syscon-wdt-errorrst = <&cpg 0xb40 1>;
 			status = "disabled";
 		};
 
@@ -465,6 +467,7 @@ wdt2: watchdog@13000000 {
 			clock-names = "pclk", "oscclk";
 			resets = <&cpg 0x77>;
 			power-domains = <&cpg>;
+			renesas,r9a09g057-syscon-wdt-errorrst = <&cpg 0xb40 2>;
 			status = "disabled";
 		};
 
@@ -475,6 +478,7 @@ wdt3: watchdog@13000400 {
 			clock-names = "pclk", "oscclk";
 			resets = <&cpg 0x78>;
 			power-domains = <&cpg>;
+			renesas,r9a09g057-syscon-wdt-errorrst = <&cpg 0xb40 3>;
 			status = "disabled";
 		};
 
-- 
2.43.0