linux-kernel - [PATCH 2/3 v3] x86: ce4100: force reboot method to be KBD

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Message-Id: <1351518020-25556-3-git-send-email-ffainelli@freebox.fr>
Date:	Mon, 29 Oct 2012 14:40:19 +0100
From:	Florian Fainelli <ffainelli@...ebox.fr>
To:	tglx@...utronix.de
Cc:	mingo@...hat.com, x86@...nel.org, rui.zhang@...el.com,
	alan@...ux.intel.com, linux-kernel@...r.kernel.org,
	Florian Fainelli <ffainelli@...ebox.fr>,
	Maxime Bizon <mbizon@...ebox.fr>
Subject: [PATCH 2/3 v3] x86: ce4100: force reboot method to be KBD

From: Maxime Bizon <mbizon@...ebox.fr>

The default reboot is via ACPI for this platform, and the CEFDK bootloader
actually supports this, but will issue a system power off instead of a real
reboot. Setting the reboot method to be KBD instead of ACPI ensures proper
system reboot.

Acked-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Signed-off-by: Maxime Bizon <mbizon@...ebox.fr>
Signed-off-by: Florian Fainelli <ffainelli@...ebox.fr>
---
 arch/x86/platform/ce4100/ce4100.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/x86/platform/ce4100/ce4100.c b/arch/x86/platform/ce4100/ce4100.c
index 5de16e3..92525cb 100644
--- a/arch/x86/platform/ce4100/ce4100.c
+++ b/arch/x86/platform/ce4100/ce4100.c
@@ -21,6 +21,7 @@
 #include <asm/i8259.h>
 #include <asm/io.h>
 #include <asm/io_apic.h>
+#include <asm/emergency-restart.h>
 
 static int ce4100_i8042_detect(void)
 {
@@ -151,6 +152,15 @@ void __init x86_ce4100_early_setup(void)
 	x86_init.mpparse.find_smp_config = x86_init_noop;
 	x86_init.pci.init = ce4100_pci_init;
 
+	/*
+	 * By default, the reboot method is ACPI which is supported by the
+	 * CE4100 bootloader CEFDK using FADT.ResetReg Address and ResetValue
+	 * the bootloader will however issue a system power off instead of
+	 * reboot. By using BOOT_KBD we ensure proper system reboot as
+	 * expected.
+	 */
+	reboot_type = BOOT_KBD;
+
 #ifdef CONFIG_X86_IO_APIC
 	x86_init.pci.init_irq = sdv_pci_init;
 	x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc_nocheck;
-- 
1.7.10.4

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