linux-kernel - [PATCH v6 5/5] arm64: dts: qcom: Add PSCI SYSTEM

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Message-ID: <20241018-arm-psci-system_reset2-vendor-reboots-v6-5-50cbe88b0a24@quicinc.com>
Date: Fri, 18 Oct 2024 12:39:50 -0700
From: Elliot Berman <quic_eberman@...cinc.com>
To: Bjorn Andersson <andersson@...nel.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>,
        Arnd Bergmann
	<arnd@...db.de>, Olof Johansson <olof@...om.net>,
        Catalin Marinas
	<catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, <cros-qcom-dts-watchers@...omium.org>,
        Krzysztof Kozlowski
	<krzk+dt@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Konrad Dybcio
	<konradybcio@...nel.org>
CC: 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>,
        Elliot Berman <quic_eberman@...cinc.com>
Subject: [PATCH v6 5/5] arm64: dts: qcom: Add PSCI SYSTEM_RESET2 types for
 sa8775p-ride

Add nodes for the vendor-defined system resets. "bootloader" will cause
device to reboot and stop in the bootloader's fastboot mode. "edl" will
cause device to reboot into "emergency download mode", which permits
loading images via the Firehose protocol.

Co-developed-by: Shivendra Pratap <quic_spratap@...cinc.com>
Signed-off-by: Shivendra Pratap <quic_spratap@...cinc.com>
Signed-off-by: Elliot Berman <quic_eberman@...cinc.com>
---
 arch/arm64/boot/dts/qcom/sa8775p-ride.dtsi | 7 +++++++
 arch/arm64/boot/dts/qcom/sa8775p.dtsi      | 2 +-
 include/linux/arm-smccc.h                  | 5 +++++
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sa8775p-ride.dtsi b/arch/arm64/boot/dts/qcom/sa8775p-ride.dtsi
index 2a6170623ea9..b0eb779b3ec5 100644
--- a/arch/arm64/boot/dts/qcom/sa8775p-ride.dtsi
+++ b/arch/arm64/boot/dts/qcom/sa8775p-ride.dtsi
@@ -498,6 +498,13 @@ &pmm8654au_3_gpios {
 			  "GNSS_BOOT_MODE";
 };
 
+&psci {
+	reset-types {
+		mode-bootloader = <0x10001 0x2>;
+		mode-edl <0 0x1>;
+	};
+};
+
 &qupv3_id_1 {
 	status = "okay";
 };
diff --git a/arch/arm64/boot/dts/qcom/sa8775p.dtsi b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
index 23f1b2e5e624..dd36eea80f7c 100644
--- a/arch/arm64/boot/dts/qcom/sa8775p.dtsi
+++ b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
@@ -329,7 +329,7 @@ pmu {
 		interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_HIGH>;
 	};
 
-	psci {
+	psci: psci {
 		compatible = "arm,psci-1.0";
 		method = "smc";
 	};
diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h
index 083f85653716..bdc974b76df8 100644
--- a/include/linux/arm-smccc.h
+++ b/include/linux/arm-smccc.h
@@ -85,6 +85,11 @@
 			   ARM_SMCCC_SMC_32,				\
 			   0, 2)
 
+#define ARM_SMCCC_ARCH_FEATURE_AVAILABILITY_ID				\
+	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL,				\
+			   ARM_SMCCC_SMC_32,				\
+			   0, 3)
+
 #define ARM_SMCCC_ARCH_WORKAROUND_1					\
 	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL,				\
 			   ARM_SMCCC_SMC_32,				\

-- 
2.34.1