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Subject: CFR: Generalized power-management interface
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Date: Sun, 31 Dec 2000 18:02:16 +0900
From: Mitsuru IWASAKI <iwasaki@jp.FreeBSD.org>
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Hi,

I've created new common framework on generalized power-management
interface for userland utilities.

http://people.freebsd.org/~iwasaki/acpi/power-20001229.tar.gz

This provides some PM APIs to APM applications, such as wmapm, so that
these applications can be ported smoothly to use ACPI (power
management portion).  Currently following APIs are implemented;

int	 power_get_syspm_info(struct power_syspm_info *);
int	 power_get_batt_info(u_int, struct power_batt_info *);
int	 power_standby(void);
int	 power_suspend(void);
int	 power_hibernate(void);

And PM event notification mechanism is suggested to be implemented so far.

Sample application is included in usr.sbin/power/ which is very similar
to apm(8) but supports ACPI as well.

usr.sbin/acpi/acpibatt/ is for displaying acpi_cmbat (ACPI Control
Method Battery), can be used to verify that generalized
power-management interface is working correctly.
Note that many ACPI BIOS give us unknown battery remaining time when
ac-line is plugged in.  MIB 'hw.battery.full_charge_time' can be used to
specify the full charged remaining time of batteries in minutes, like
	sysctl -w hw.battery.full_charge_time=60,60
for multiple number of batteries, or
	sysctl -w hw.battery.full_charge_time=120
for a battery installed.

To test them, /dev/power is required as a device control file.

% ls -l /dev/power
crw-r--r--  1 root  wheel  210,   0  12/19 04:51 /dev/power

I'll commit them at sometime early in coming century.

Any comments would be appreciated.  Thanks!


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