From: "Paweł Chmiel" <pawel.mikolaj.chmiel@gmail.com>
To: kgene@kernel.org, krzk@kernel.org, alim.akhtar@samsung.com
Cc: robh+dt@kernel.org, a.kesavan@samsung.com,
naveenkrishna.ch@gmail.com, thomas.ab@samsung.com,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org,
"Paweł Chmiel" <pawel.mikolaj.chmiel@gmail.com>
Subject: [PATCH] arm64: dts: exynos: Fix reboot/poweroff issues on Exynos7
Date: Wed, 28 Oct 2020 22:08:13 +0100 [thread overview]
Message-ID: <20201028210813.49874-1-pawel.mikolaj.chmiel@gmail.com> (raw)
In vendor sources for Exynos 7420, psci is not used to reboot or
poweroff device. Instead we should use syscon reboot/poweroff.
Previously it was not possible to poweroff (no syscon poweroff node) or
reboot (because it was handled by psci and this way is not working for
Exynos).
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@gmail.com>
---
arch/arm64/boot/dts/exynos/exynos7.dtsi | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/exynos/exynos7.dtsi b/arch/arm64/boot/dts/exynos/exynos7.dtsi
index 959918f4ca45..47d54c369d03 100644
--- a/arch/arm64/boot/dts/exynos/exynos7.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynos7.dtsi
@@ -117,8 +117,10 @@ cpu_atlas3: cpu@3 {
};
psci {
- compatible = "arm,psci-0.2";
+ compatible = "arm,psci";
method = "smc";
+ cpu_off = <0x84000002>;
+ cpu_on = <0xC4000003>;
};
soc: soc@0 {
@@ -552,6 +554,13 @@ pmu_system_controller: system-controller@105c0000 {
compatible = "samsung,exynos7-pmu", "syscon";
reg = <0x105c0000 0x5000>;
+ poweroff: syscon-poweroff {
+ compatible = "syscon-poweroff";
+ regmap = <&pmu_system_controller>;
+ offset = <0x330C>; /* PS_HOLD_CONTROL */
+ mask = <0x5200>; /* reset value */
+ };
+
reboot: syscon-reboot {
compatible = "syscon-reboot";
regmap = <&pmu_system_controller>;
--
2.27.0
next reply other threads:[~2020-10-29 2:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-28 21:08 Paweł Chmiel [this message]
2020-10-29 17:50 ` [PATCH] arm64: dts: exynos: Fix reboot/poweroff issues on Exynos7 Krzysztof Kozlowski
2020-11-04 21:14 ` Paweł Chmiel
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