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dadaa1c2c0
This patch powers down the Malta in response to a power off command (eg. poweroff or shutdown -P). It may then be powered back up by pressing the "ON/NMI" button (S4) on the board. In cases where the power off state cannot be entered (eg. because the required PCI support is disabled) the current reset behaviour will be used as a fallback. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Tested-by: James Hogan <james.hogan@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/6907/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
48 lines
1.0 KiB
C
48 lines
1.0 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Carsten Langgaard, carstenl@mips.com
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* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
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*/
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#include <linux/io.h>
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#include <linux/pm.h>
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#include <asm/reboot.h>
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#include <asm/mach-malta/malta-pm.h>
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#define SOFTRES_REG 0x1f000500
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#define GORESET 0x42
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static void mips_machine_restart(char *command)
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{
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unsigned int __iomem *softres_reg =
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ioremap(SOFTRES_REG, sizeof(unsigned int));
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__raw_writel(GORESET, softres_reg);
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}
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static void mips_machine_halt(void)
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{
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while (true);
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}
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static void mips_machine_power_off(void)
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{
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mips_pm_suspend(PIIX4_FUNC3IO_PMCNTRL_SUS_TYP_SOFF);
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pr_info("Failed to power down, resetting\n");
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mips_machine_restart(NULL);
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}
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static int __init mips_reboot_setup(void)
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{
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_machine_restart = mips_machine_restart;
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_machine_halt = mips_machine_halt;
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pm_power_off = mips_machine_power_off;
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return 0;
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}
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arch_initcall(mips_reboot_setup);
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