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From:   huaqian.li@siemens.com
To:     wim@linux-watchdog.org, linux@roeck-us.net, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org
Cc:     huaqianlee@gmail.com, nm@ti.com, vigneshr@ti.com,
        kristo@kernel.org, linux-watchdog@vger.kernel.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, jan.kiszka@siemens.com,
        baocheng.su@siemens.com, Li Hua Qian <huaqian.li@siemens.com>
Subject: [DONOTMERGE PATCH v6 2/3] arm64: dts: ti: Add reserved memory for watchdog
Date:   Tue, 18 Jul 2023 10:10:06 +0800
Message-Id: <20230718021007.1338761-3-huaqian.li@siemens.com>
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From: Li Hua Qian <huaqian.li@siemens.com>

This patch adds a reserved memory for the TI AM65X platform watchdog to
reserve the specific info, triggering the watchdog reset in last boot,
to know if the board reboot is due to a watchdog reset.

Signed-off-by: Li Hua Qian <huaqian.li@siemens.com>
---
 arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi b/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi
index e26bd988e522..4bb20d493651 100644
--- a/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi
@@ -63,6 +63,12 @@ rtos_ipc_memory_region: ipc-memories@a2000000 {
 			alignment = <0x1000>;
 			no-map;
 		};
+
+		/* To reserve the power-on(PON) reason for watchdog reset */
+		wdt_reset_memory_region: wdt-memory@a2200000 {
+			reg = <0x00 0xa2200000 0x00 0x1000>;
+			no-map;
+		};
 	};
 
 	leds {
@@ -718,3 +724,7 @@ &mcu_r5fss0_core1 {
 			<&mcu_r5fss0_core1_memory_region>;
 	mboxes = <&mailbox0_cluster1>, <&mbox_mcu_r5fss0_core1>;
 };
+
+&mcu_rti1 {
+	memory-region = <&wdt_reset_memory_region>;
+};
-- 
2.34.1