ACPI / SBS: Don't assume the existence of an SBS charger
authorMatthew Garrett <matthew.garrett@nebula.com>
Sat, 20 Sep 2014 11:19:45 +0000 (13:19 +0200)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>
Wed, 24 Sep 2014 21:31:11 +0000 (23:31 +0200)
commit3031cddea633ea5328162d3d712a582e4205dbed
treefdd49651c754cd6fd2f2c7d9810720eb21a6c230
parent0f33be009b89d2268e94194dc4fd01a7851b6d51
ACPI / SBS: Don't assume the existence of an SBS charger

Apple hardware continues to expose an ACPI AC charger even when using
SBS to report battery state. The charger status byte returns all 0s in
this case.  Since the spec requires that bit 4 be 1 at all times, assume
that there's not really a charger if it's set to zero.

Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
drivers/acpi/sbs.c