61 lines
1.9 KiB
Diff
61 lines
1.9 KiB
Diff
From f58ef6a45f162e2bd1d0c7c0de00f94bccd3b6f5 Mon Sep 17 00:00:00 2001
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From: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>
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Date: Wed, 4 Nov 2020 00:06:26 +0100
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Subject: [PATCH 02/11] ARM: dts: exynos: Add reboot modes to midas
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The values have been taken from the sec-reboot.c driver in
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the 3.0.101 smdk4412 kernel used in LineageOS which is based
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on Samsung source code releases for various devices.
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Only the strict minimum modes have been added: the S-Boot 4.0
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bootloader is nonfree, so exporting less well known modes could
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potentially have unwanted consequences.
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TODO:
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- After reboot to download, heimdall doesn't work while it works
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with the SMDK4412 kernel.
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- Fix reboot without arguments (Test: Try "Reboot system now"
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in a recovery after rebooting to the recovery)
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Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>
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---
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arch/arm/boot/dts/exynos4412-midas.dtsi | 23 +++++++++++++++++++++++
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1 file changed, 23 insertions(+)
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diff --git a/arch/arm/boot/dts/exynos4412-midas.dtsi b/arch/arm/boot/dts/exynos4412-midas.dtsi
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index 8e1c19a8ad06..1f9cd7474b16 100644
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--- a/arch/arm/boot/dts/exynos4412-midas.dtsi
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+++ b/arch/arm/boot/dts/exynos4412-midas.dtsi
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@@ -982,6 +982,29 @@ &mshc_0 {
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&pmu_system_controller {
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assigned-clocks = <&pmu_system_controller 0>;
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assigned-clock-parents = <&clock CLK_XUSBXTI>;
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+
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+ /* S-Boot 4.0 */
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+ #define S5P_INFORM2 0xF008
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+ #define S5P_INFORM3 0x080C
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+ #define BOOT_MODE_PREFIX 0x12345670
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+ #define BOOT_NORMAL (BOOT_MODE_PREFIX | 0)
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+ #define BOOT_DOWNLOAD (BOOT_MODE_PREFIX | 1)
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+ #define BOOT_RECOVERY (BOOT_MODE_PREFIX | 4)
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+
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+ no-lpm-mode {
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+ compatible = "syscon-reboot";
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+ offset = <S5P_INFORM2>;
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+ value = <0x12345678>;
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+ };
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+
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+ reboot-mode {
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+ compatible = "syscon-reboot-mode";
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+ offset = <S5P_INFORM3>;
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+ mode-normal = <BOOT_NORMAL>;
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+ mode-recovery = <BOOT_RECOVERY>;
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+ mode-bootloader = <BOOT_DOWNLOAD>;
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+ mode-download = <BOOT_DOWNLOAD>;
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+ };
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};
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&pinctrl_0 {
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--
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2.38.1
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