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Diffstat (limited to 'share/man/man4/man4.hppa/power.4')
| -rw-r--r-- | share/man/man4/man4.hppa/power.4 | 41 |
1 files changed, 22 insertions, 19 deletions
diff --git a/share/man/man4/man4.hppa/power.4 b/share/man/man4/man4.hppa/power.4 index 83af0d43c6e..63934d39f38 100644 --- a/share/man/man4/man4.hppa/power.4 +++ b/share/man/man4/man4.hppa/power.4 @@ -1,4 +1,4 @@ -.\" $OpenBSD: power.4,v 1.1 2003/08/20 21:17:08 mickey Exp $ +.\" $OpenBSD: power.4,v 1.2 2003/09/02 21:11:50 jmc Exp $ .\" .\" Copyright (c) 2003 Michael Shalayeff .\" All rights reserved. @@ -28,46 +28,49 @@ .Os .Sh NAME .Nm power -.Nd Power button and power fail support +.Nd power button and power fail support .Sh SYNOPSIS .Cd "power0 at mainbus?" -.Sh INTRODUCTION +.Sh DESCRIPTION .Tn HP PA-RISC machines support power failure detection in different forms: -.Bl -bullet -compact +.Pp +.Bl -bullet -offset indent -compact .It .Dq soft -power button; +power button .It -power failure interrupt. +power failure interrupt .El .Pp The .Nm -driver tries it's best at determining the power failure condition -that is a result of power button being depressed or a power supply +driver tries its best to determinine the power failure condition +that is a result of a power button being depressed or a power supply system failure or a similar condition. -Upon detection of any of the beforementioned conditions it tries to -gracefully (if possible) shutdown the system through a call to +Upon detection of any of the aforementioned conditions, it tries to gracefully +.Pq if possible +shutdown the system through a call to the .Xr boot 9 function. .Pp -On systems equipped with +On systems equipped with the .Xr lasi 4 -bus adapter we find a +bus adapter, we find a .Dq soft -power buttun which upon depression gives us a signal in the +power button which upon depression gives us a signal in the .Dq power register and thus polling periodically we detect the event. -Since that bit comes directly from the power button without any -dampenning we perform a second long delay thus -quick transitions off and on will +Since that bit comes directly from the power button without any dampening, +we perform a second long delay; +thus quick transitions off and on will .Em not result in a shutdown. .Pp -On modern systems an interruption is signalled upon the power -button depression and thus this avoids polling and does not -require (as being implemented in hardware) dampenning. +On modern systems, an interruption is signalled upon the power +button depression and thus this avoids polling and does not require +.Pq as does being implemented in hardware +dampening. .Sh SEE ALSO .Xr intro 4 , .Xr lasi 4 , |