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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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