linux-kernel - Re: [PATCH v2 0/6] Add and fix ESM nodes

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Message-ID: <4295a15a-6285-4005-bc40-328e52addc2b@siemens.com>
Date: Wed, 14 Aug 2024 06:04:56 +0200
From: Jan Kiszka <jan.kiszka@...mens.com>
To: Judith Mendez <jm@...com>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Nishanth Menon <nm@...com>
Cc: Vignesh Raghavendra <vigneshr@...com>, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/6] Add and fix ESM nodes

On 14.08.24 01:03, Judith Mendez wrote:
> The following patch adds ESM nodes and fixes ESM source
> interrupts for Sitara K3 platforms. Currently watchdog cannot
> reset the CPU because of misconfiguration or missing ESM node
> in DT.
> 
> ESM node was added for am62ax and am65x. For am62px ESM source
> interrupts are fixed. Comments were also added for clarity on what
> source interrupts are routed to ESM based on device TRM.
> 
> ESM nodes like MCU ESM for am65x are added for device completion,
> currently, some ESM0 events are not routed to MCU ESM, so watchdog
> cannot reset the CPU using the current implementation.

Yes, that's why there is https://github.com/siemens/k3-rti-wdt and
probably similar bits in other R5 firmware. I was always told that is
the only way to reset the /system/ (CPU alone would not help). That
information is still correct?

Jan

> 
> Changes since v1:
> - Remove watchdog patch
> - Add am64x patch 5/6
> - Add am65x patch 6/6
> - Add missing bootph flag
> 
> Judith Mendez (5):
>   arm64: dts: ti: k3-am62a: Add ESM nodes
>   arm64: dts: ti: k3-am62p: Fix ESM interrupt sources
>   arm64: dts: ti: k3-am62: Add comments to ESM nodes
>   arm64: dts: ti: k3-am64: Add more ESM interrupt sources
>   arm64: dts: ti: k3-am65: Add ESM nodes
> 
> Santhosh Kumar K (1):
>   arm64: dts: ti: k3-am62p: Remove 'reserved' status for ESM
> 
>  arch/arm64/boot/dts/ti/k3-am62-main.dtsi               | 1 +
>  arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi                | 1 +
>  arch/arm64/boot/dts/ti/k3-am62a-main.dtsi              | 8 ++++++++
>  arch/arm64/boot/dts/ti/k3-am62a-mcu.dtsi               | 8 ++++++++
>  arch/arm64/boot/dts/ti/k3-am62p-j722s-common-main.dtsi | 3 ++-
>  arch/arm64/boot/dts/ti/k3-am62p-j722s-common-mcu.dtsi  | 4 ++--
>  arch/arm64/boot/dts/ti/k3-am64-main.dtsi               | 3 ++-
>  arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi                | 3 ++-
>  arch/arm64/boot/dts/ti/k3-am65-main.dtsi               | 8 ++++++++
>  arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi                | 8 ++++++++
>  10 files changed, 42 insertions(+), 5 deletions(-)
> 
> 
> base-commit: e3cce1229c34b5c28f103361c4d6b3ef17302d5d

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