71bc2d7846
Summary: Add a polling loop (1Hz) to monitor the battery and AC status, to notify devd like ACPI does for power monitoring. This allows /etc/rc.d/power_profile to work on PowerPC laptops Test Plan: Tested on a Titanium PowerBook, configuring economy_cpu_freq and performance_cpu_freq, disabling powerd. Reviewers: #powerpc, nwhitehorn Reviewed By: nwhitehorn Subscribers: rpaulo Differential Revision: https://reviews.freebsd.org/D937