linux-kernel - [PATCH v3 3/3] arm64: dts: qcom: sm8250: Add vendor-specific PSCI system reset2 type

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Date:   Thu,  5 Mar 2020 11:05:29 -0800
From:   Elliot Berman <eberman@...eaurora.org>
To:     Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Sudeep Holla <sudeep.holla@....com>
Cc:     Elliot Berman <eberman@...eaurora.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Trilok Soni <tsoni@...eaurora.org>,
        Prasad Sodagudi <psodagud@...eaurora.org>,
        David Collins <collinsd@...eaurora.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 3/3] arm64: dts: qcom: sm8250: Add vendor-specific PSCI system reset2 type

Qualcomm Technologies, Inc. SoCs do not guarantee that an architectural
warm reset boots back into Linux kernel. For instance, if download mode
or reboot reason cookies are set, the SoC would do a warm reset into an
alternate exception level (e.g. a mode to collect RAM dumps) or an alternate
EL1 application (e.g. fastboot mode). Thus, Qualcomm Technologies,
Inc. SoCs support a vendor-specific warm reset type that can be used in
all instances of warm/soft reboots.

Signed-off-by: Elliot Berman <eberman@...eaurora.org>
---
 arch/arm64/boot/dts/qcom/sm8250.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/qcom/sm8250.dtsi b/arch/arm64/boot/dts/qcom/sm8250.dtsi
index f63df12..11cede1 100644
--- a/arch/arm64/boot/dts/qcom/sm8250.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8250.dtsi
@@ -162,6 +162,7 @@
 	psci {
 		compatible = "arm,psci-1.0";
 		method = "smc";
+		arm,psci-sys-reset2-vendor-param = <0>;
 	};
 
 	reserved_memory: reserved-memory {
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project