linux-kernel - [PATCH 4.19 122/346] arm64: dts: exynos: Correct psci compatible used on Exynos7

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Message-Id: <20201228124925.695189130@linuxfoundation.org>
Date:   Mon, 28 Dec 2020 13:47:21 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 122/346] arm64: dts: exynos: Correct psci compatible used on Exynos7

From: Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>

[ Upstream commit e1e47fbca668507a81bb388fcae044b89d112ecc ]

It's not possible to reboot or poweroff Exynos7420 using PSCI. Instead
we need to use syscon reboot/poweroff drivers, like it's done for other
Exynos SoCs. This was confirmed by checking vendor source and testing it
on Samsung Galaxy S6 device based on this SoC.

To be able to use custom restart/poweroff handlers instead of PSCI
functions, we need to correct psci compatible. This also requires us to
provide function ids for CPU_ON and CPU_OFF.

Fixes: fb026cb65247 ("arm64: dts: Add reboot node for exynos7")
Fixes: b9024cbc937d ("arm64: dts: Add initial device tree support for exynos7")
Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>
Link: https://lore.kernel.org/r/20201107133926.37187-2-pawel.mikolaj.chmiel@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm64/boot/dts/exynos/exynos7.dtsi | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/exynos/exynos7.dtsi b/arch/arm64/boot/dts/exynos/exynos7.dtsi
index 38a07d9763a3f..5c5e57026c275 100644
--- a/arch/arm64/boot/dts/exynos/exynos7.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynos7.dtsi
@@ -62,8 +62,10 @@
 	};
 
 	psci {
-		compatible = "arm,psci-0.2";
+		compatible = "arm,psci";
 		method = "smc";
+		cpu_off = <0x84000002>;
+		cpu_on = <0xC4000003>;
 	};
 
 	soc: soc {
-- 
2.27.0