From: Li Hua Qian <huaqian.li@xxxxxxxxxxx> 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@xxxxxxxxxxx> --- The driver and binding have hit the master, which could be found in the following link. - watchdog:rit_wdt: Add support for WDIOF_CARDRESET - dt-bindings: watchdog: ti,rti-wdt: Add support for WDIOF_CARDRESET https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=29057cc5bddc785ea0a11534d7ad2546fa0872d3 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 61a634afaa4f..88321799d468 100644 --- a/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi @@ -75,6 +75,12 @@ 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 { @@ -1427,6 +1433,10 @@ &mcu_r5fss0_core1 { mboxes = <&mailbox0_cluster1>, <&mbox_mcu_r5fss0_core1>; }; +&mcu_rti1 { + memory-region = <&wdt_reset_memory_region>; +}; + &icssg0_mdio { status = "okay"; pinctrl-names = "default"; -- 2.34.1
