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    Subject[PATCH, RFC] [3/3] APM support for generic in-kernel AC status
    This adds APM support for the generic in-kernel AC status code.

    Signed-Off-By: Matthew Garrett <mjg59@srcf.ucam.org>

    diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c
    index 6c8e483..e63f533 100644
    --- a/arch/i386/kernel/apm.c
    +++ b/arch/i386/kernel/apm.c
    @@ -1627,6 +1627,18 @@ static int do_open(struct inode * inode,
    return 0;
    }

    +static int apm_get_online_status(void)
    +{
    + unsigned short bx;
    + unsigned short cx;
    + unsigned short dx;
    +
    + if (apm_get_power_status(&bx, &cx, &dx))
    + return 0;
    +
    + return ((bx >> 8) & 0xff);
    +};
    +
    static int apm_get_info(char *buf, char **start, off_t fpos, int length)
    {
    char * p;
    @@ -2372,6 +2384,8 @@ static int __init apm_init(void)

    misc_register(&apm_device);

    + pm_set_ac_status(apm_get_online_status);
    +
    if (HZ != 100)
    idle_period = (idle_period * HZ) / 100;
    if (idle_threshold < 100) {
    @@ -2396,6 +2410,9 @@ static void __exit apm_exit(void)
    */
    cpu_idle_wait();
    }
    +
    + pm_set_ac_status(NULL);
    +
    if (((apm_info.bios.flags & APM_BIOS_DISENGAGED) == 0)
    && (apm_info.connection_version > 0x0100)) {
    error = apm_engage_power_management(APM_DEVICE_ALL, 0);
    --
    Matthew Garrett | mjg59@srcf.ucam.org
    -
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