linux-kernel - RE: [PATCH v3 2/3] arm64: dts: ti: Add reserved memory for watchdog

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Date: Mon, 8 Jan 2024 08:16:15 +0000
From: "Li, Hua Qian" <HuaQian.Li@...mens.com>
To: Nishanth Menon <nm@...com>
CC: "wim@...ux-watchdog.org" <wim@...ux-watchdog.org>, "linux@...ck-us.net"
	<linux@...ck-us.net>, "robh+dt@...nel.org" <robh+dt@...nel.org>,
	"krzysztof.kozlowski+dt@...aro.org" <krzysztof.kozlowski+dt@...aro.org>,
	"conor+dt@...nel.org" <conor+dt@...nel.org>, "huaqianlee@...il.com"
	<huaqianlee@...il.com>, "vigneshr@...com" <vigneshr@...com>,
	"kristo@...nel.org" <kristo@...nel.org>, "linux-watchdog@...r.kernel.org"
	<linux-watchdog@...r.kernel.org>, "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "Kiszka, Jan"
	<jan.kiszka@...mens.com>, "Su, Bao Cheng" <baocheng.su@...mens.com>
Subject: RE: [PATCH v3 2/3] arm64: dts: ti: Add reserved memory for watchdog

Hi Nishanth,

The maintainers have picked up the driver and bindings, as follows:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=29057cc5bddc785ea0a11534d7ad2546fa0872d3

Do you have time to work on the "DONOTMERGE" dts patch?

-----Original Message-----
From: Nishanth Menon <nm@...com>
Sent: Saturday, July 15, 2023 6:53 AM
To: Li, Hua Qian (DI FA CTR IPC CN PRC4) <HuaQian.Li@...mens.com>
Cc: wim@...ux-watchdog.org; linux@...ck-us.net; robh+dt@...nel.org; krzysztof.kozlowski+dt@...aro.org; conor+dt@...nel.org; huaqianlee@...il.com; vigneshr@...com; kristo@...nel.org; linux-watchdog@...r.kernel.org; devicetree@...r.kernel.org; linux-kernel@...r.kernel.org; linux-arm-kernel@...ts.infradead.org; Kiszka, Jan (T CED) <jan.kiszka@...mens.com>; Su, Bao Cheng (DI FA CTR IPC CN PRC4) <baocheng.su@...mens.com>
Subject: Re: [PATCH v3 2/3] arm64: dts: ti: Add reserved memory for watchdog

On 17:51-20230713, huaqian.li@...mens.com wrote:
> From: Li Hua Qian <huaqian.li@...mens.com>

I guess I should be explicit about this: Lets keep this dts patch as "DONOTMERGE" in subject line for driver subsystem maintainer (I don't want a repeat of cpufreq maintainers picking up dts and associated warnings that are now pending fixes), resubmit at next rc1 and I can queue up the dts once the maintainers pick up the driver and bindings.

Ref: https://lore.kernel.org/all/20230714084725.27847-1-krzysztof.kozlowski@linaro.org/

>
> 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@...mens.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@...00000 {
>                       alignment = <0x1000>;
>                       no-map;
>               };
> +
> +             /* To reserve the power-on(PON) reason for watchdog reset */
> +             wdt_reset_memory_region: wdt-memory@...00000 {
> +                     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
>

--
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3  1A34 DDB5 849D 1736 249D