b6911bba59
This patch introduces code which will enter a suspend state via the PIIX4. This can only be done when PCI support is enabled since it requires access to PCI I/O space and the generation of a special cycle on the PCI bus. In cases where PCI is disabled the mips_pm_suspend function will simply always return an error. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/6905/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
37 lines
1,012 B
C
37 lines
1,012 B
C
/*
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* Copyright (C) 2014 Imagination Technologies
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* Author: Paul Burton <paul.burton@imgtec.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#ifndef __ASM_MIPS_MACH_MALTA_PM_H__
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#define __ASM_MIPS_MACH_MALTA_PM_H__
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#include <asm/mips-boards/piix4.h>
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#ifdef CONFIG_MIPS_MALTA_PM
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/**
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* mips_pm_suspend - enter a suspend state
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* @state: the state to enter, one of PIIX4_FUNC3IO_PMCNTRL_SUS_TYP_*
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*
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* Enters a suspend state via the Malta's PIIX4. If the state to be entered
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* is one which loses context (eg. SOFF) then this function will never
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* return.
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*/
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extern int mips_pm_suspend(unsigned state);
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#else /* !CONFIG_MIPS_MALTA_PM */
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static inline int mips_pm_suspend(unsigned state)
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{
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return -EINVAL;
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}
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#endif /* !CONFIG_MIPS_MALTA_PM */
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#endif /* __ASM_MIPS_MACH_MALTA_PM_H__ */
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