linux-kernel - Re: [RFC PATCH 0/4] Implement a PSCI SYSTEM

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Message-ID: <65afff8f-fd02-1344-56b5-f9e3deda1d47@broadcom.com>
Date:   Tue, 25 Jul 2023 12:12:11 -0700
From:   Florian Fainelli <florian.fainelli@...adcom.com>
To:     Elliot Berman <quic_eberman@...cinc.com>,
        Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Sebastian Reichel <sre@...nel.org>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, kernel@...cinc.com,
        Satya Durga Srinivasu Prabhala <quic_satyap@...cinc.com>,
        Melody Olvera <quic_molvera@...cinc.com>,
        Prasad Sodagudi <quic_psodagud@...cinc.com>
Subject: Re: [RFC PATCH 0/4] Implement a PSCI SYSTEM_RESET2 reboot-mode driver

Hello,

On 7/24/23 15:30, Elliot Berman wrote:
> PSCI implements a restart notifier for architectural defined resets.
> The SYSTEM_RESET2 call allows vendor firmware to define additional reset
> types which could be mapped to the reboot reason.
> 
> Implement a driver to wire the reboot-mode framework to make vendor
> SYSTEM_RESET2 calls on reboot.
> 
> This is a continuation from https://lore.kernel.org/all/4a679542-b48d-7e11-f33a-63535a5c68cb@quicinc.com/

Would appreciate being CC'd on a the non-RFC postings of this patch. 
FWIW, my use case is better described with this earlier submission:

https://lore.kernel.org/lkml/20220122035421.4086618-1-f.fainelli@gmail.com/T/#m74e4243c1af3a8d896e19b573b58f562fa09961d

It would be neat if I could leverage your driver in order to implement 
this custom "reboot powercycle" implementation. Towards that goal, we 
would likely need to specify the desired reboot "sub" operation 
alongside its PSCI SYSTEM_RESET2 reboot type argument?

Thanks!
-- 
Florian


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