linux-kernel - Re: [PATCH v13 07/10] firmware: psci: Implement vendor-specific resets as reboot-mode

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Message-ID: <20250728-exotic-armadillo-of-upgrade-fbebc1@sudeepholla>
Date: Mon, 28 Jul 2025 14:23:17 +0100
From: Sudeep Holla <sudeep.holla@....com>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
	Sudeep Holla <sudeep.holla@....com>,
	Shivendra Pratap <shivendra.pratap@....qualcomm.com>,
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Sebastian Reichel <sre@...nel.org>, Rob Herring <robh@...nel.org>,
	Souvik Chakravarty <Souvik.Chakravarty@....com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Andy Yan <andy.yan@...k-chips.com>,
	Mark Rutland <mark.rutland@....com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Konrad Dybcio <konradybcio@...nel.org>,
	cros-qcom-dts-watchers@...omium.org, Vinod Koul <vkoul@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Mukesh Ojha <mukesh.ojha@....qualcomm.com>,
	Stephen Boyd <swboyd@...omium.org>,
	Andre Draszik <andre.draszik@...aro.org>, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
	Elliot Berman <quic_eberman@...cinc.com>,
	Srinivas Kandagatla <srini@...nel.org>
Subject: Re: [PATCH v13 07/10] firmware: psci: Implement vendor-specific
 resets as reboot-mode

On Mon, Jul 28, 2025 at 02:23:14PM +0200, Krzysztof Kozlowski wrote:
> On 28/07/2025 14:03, Dmitry Baryshkov wrote:
> >>
> >>> and the reboot-mode is defined in the
> >>> previous patch. So, I'd assume, the path is defined.
> >>
> >> As I said, path is not. only psci/reboot-mode is.
> > 
> > Do we have an _actual_ use case where PSCI node is not at at root node? 
> 
> Yes, many cases, because it belongs as well to firmware node.
> 

+1, I was about to make similar comment. /psci predates the formal push
to put all firmware related nodes under /firmware, so /firmware/psci is
equally possible path and should be recommended one so that all such
firmware related nodes are contained under /firmware.

-- 
Regards,
Sudeep