linux-kernel - Re: [PATCH v4 0/7] Reserve Timer Nodes to avoid clash with Remoteproc firmware

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Message-ID: <e6d97ec3-07ad-454f-b804-a39a0397beeb@ti.com>
Date: Mon, 26 Aug 2024 16:27:25 +0530
From: Beleswar Prasad Padhi <b-padhi@...com>
To: <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>, <robh@...nel.org>,
        <krzk+dt@...nel.org>, <conor+dt@...nel.org>
CC: <u-kumar1@...com>, <tony@...mide.com>, <bb@...com>, <d-gole@...com>,
        <afd@...com>, <hnagalla@...com>,
        <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 0/7] Reserve Timer Nodes to avoid clash with Remoteproc
 firmware


On 26/08/24 16:18, Beleswar Padhi wrote:
> The remoteproc firmware like of R5F and DSPs in the MAIN voltage domain
> use timers. At the same time, if Linux probes the timers, some
> instability is observed while booting remote cores. Therefore, change
> the status of the timer nodes to "reserved" to avoid any clash.
>
> NOTE: This series has been rebased on top of a sibling series[0] as both of them
> introduce changes in the same files. Thus, please apply [0] before applying this
> series.
>
> [0]: https://lore.kernel.org/all/20240826093024.1183540-1-b-padhi@ti.com/
>
> v4: Changelog:
> 1) Refactored changes from {}-common-proc-board.dts to {}-som.dtsi to put all
> remoteproc related changes at one place as remotecores were getting enabled at
> {}-som.dtsi file.
> 2) Rebased this series on top of [0].
>
> * Nishanth:
> 1) Fixed $subject line for all patches to include the board level files where
> the changes were applied instead of the SoC level files.
> 2) Applied these timer fixes to J721E-SK, AM68-SK and AM69-SK boards as well.


Adding to the changelog,
* Udit:
1) Dropped patch "arm64: dts: ti: k3-j722s: Change timer nodes status to 
reserved" in v4 revision as remoteproc support (DT) has not been 
upstreamed yet for j722s-evm platform.

Apologies for missing this changelog in the cover-letter itself.

>
> Link to v3:
> https://lore.kernel.org/all/20240816073908.2343650-1-b-padhi@ti.com/
>
> v3: Changelog:
> * Udit
> 1) j7200: Updated commit message description to remove DSPs as the SoC does not
> have one.
> 2) j722s: Updated the correct commit for "Fixes:" tag which introduced the bug.
> 3) For entire series, removed comment about timer usage by R5fs in the MCU
> voltage domain as those are used by Device Manager firmware to get SoC
> functional.
>
> Link to v2:
> https://lore.kernel.org/all/20240814104151.2038457-1-b-padhi@ti.com/
>
> v2: Changelog:
> - Split the changes into individual patches for each SoC to tag the
>    correct offending commit for "Fixes:" tag.
>
> * Udit
> 1) Add the correct clashing timer nodes for J7200 SoC.
> 2) Port these changes to board level dts files instead of SoC level dtsi files.
>
> Link to v1:
> https://lore.kernel.org/all/20240607105559.771080-1-b-padhi@ti.com/
>
> Beleswar Padhi (7):
>    arm64: dts: ti: k3-j7200-som-p0: Change timer nodes status to reserved
>    arm64: dts: ti: k3-j721e-som-p0: Change timer nodes status to reserved
>    arm64: dts: ti: k3-j721e-sk: Change timer nodes status to reserved
>    arm64: dts: ti: k3-j721s2-som-p0: Change timer nodes status to
>      reserved
>    arm64: dts: ti: k3-am68-sk-som: Change timer nodes status to reserved
>    arm64: dts: ti: k3-j784s4-evm: Change timer nodes status to reserved
>    arm64: dts: ti: k3-am69-sk: Change timer nodes status to reserved
>
>   arch/arm64/boot/dts/ti/k3-am68-sk-som.dtsi   | 25 ++++++++++++
>   arch/arm64/boot/dts/ti/k3-am69-sk.dts        | 41 ++++++++++++++++++++
>   arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi  | 13 +++++++
>   arch/arm64/boot/dts/ti/k3-j721e-sk.dts       | 29 ++++++++++++++
>   arch/arm64/boot/dts/ti/k3-j721e-som-p0.dtsi  | 29 ++++++++++++++
>   arch/arm64/boot/dts/ti/k3-j721s2-som-p0.dtsi | 25 ++++++++++++
>   arch/arm64/boot/dts/ti/k3-j784s4-evm.dts     | 41 ++++++++++++++++++++
>   7 files changed, 203 insertions(+)
>