• Wu Zhangjin's avatar
    MIPS: Loongson 2F: Add suspend support framework · f181bf60
    Wu Zhangjin authored
    This patch add basic suspend support for loongson2f family machines,
    loongson2f have a specific feature: when we set it's frequency to ZERO,
    it will go into a wait mode, and then can be waked up by the external
    interrupt. so, if we setup suitable interrupts before putting it into
    wait mode, we will be able wake it up whenever we want via sending the
    relative interrupts to it.
    
    These interrupts are board-specific, Yeeloong2F use the keyboard
    interrupt and SCI interrupt, but LingLoong and Fuloong2F use the
    interrupts connected to the processors directly. and BTW: some old
    LingLoong and FuLoong2F have no such interrupts connected, so, there is
    no way to wake them up from suspend mode. and therefore, please do not
    enable the kernel support for them.
    
    The board-specific support will be added in the coming patches.
    Signed-off-by: default avatarWu Zhangjin <wuzhangjin@gmail.com>
    Cc: linux-mips@linux-mips.org
    Cc: yanh@lemote.com
    Cc: huhb@lemote.com
    Cc: Wu Zhangjin <wuzhangjin@gmail.com>
    Cc: Len Brown <len.brown@intel.com>
    Cc: Rafael J. Wysocki <rjw@sisk.pl>
    Cc: linux-pm@lists.linux-foundation.org
    Patchwork: http://patchwork.linux-mips.org/patch/629/Acked-by: default avatarPavel Machek <pavel@ucw.cz>
    Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
    f181bf60
pm.c 3.19 KB