linux-kernel - Re: [PATCH v2 2/4] dt-bindings: arm: Document reboot mode magic

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Date: Tue, 16 Apr 2024 10:30:18 +0100
From: Sudeep Holla <sudeep.holla@....com>
To: Elliot Berman <quic_eberman@...cinc.com>
Cc: Bjorn Andersson <andersson@...nel.org>,
	Sudeep Holla <sudeep.holla@....com>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Sebastian Reichel <sre@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>, Vinod Koul <vkoul@...nel.org>,
	Andy Yan <andy.yan@...k-chips.com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	"Mark Rutland" <mark.rutland@....com>,
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
	Satya Durga Srinivasu Prabhala <quic_satyap@...cinc.com>,
	Melody Olvera <quic_molvera@...cinc.com>,
	Shivendra Pratap <quic_spratap@...cinc.com>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	<linux-pm@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH v2 2/4] dt-bindings: arm: Document reboot mode magic

On Sun, Apr 14, 2024 at 12:30:25PM -0700, Elliot Berman wrote:
> Add bindings to describe vendor-specific reboot modes. Values here
> correspond to valid parameters to vendor-specific reset types in PSCI
> SYSTEM_RESET2 call.
>

IIUC, PSCI SYSTEM_RESET will be always supported, so the choice of using
SYSTEM_RESET2 sounds like a system policy and must not have any information
in the device tree. All required support from PSCI is discoverable and
the policy choice must be userspace driven. That's my opinion.

-- 
Regards,
Sudeep