NHPOW(4) | Device Drivers Manual (sandpoint) | NHPOW(4) |
nhpow
—
nhpow0 at mainbus0
gpio* at nhpow0
nhpow
also detects a soft power-off
condition, which is triggered by holding the front panel power button
pressed for several seconds. This driver can optionally invoke
powerd(8) to get a finer
control over the system shutdown procedure. It is capable of reporting a
power-button-pressed event. Refer to the
powerd(8) manual section
for more details.
The nhpow
driver provides access to its 8
bidirectional GPIO pins through the
gpio(4) controller interface.
The pins have the following meaning when being written:
Pin | Active level | Function |
0 |
high | System power off |
1 |
high | Assert system reset to all devices |
2 |
low | Status LED |
3 |
high | High speed fan |
4 |
low | Debug LED 1 |
5 |
low | Debug LED 2 |
6 |
low | USB port 1 LED |
7 |
low | USB port 2 LED |
When reading, the pins have the following meaning:
Pin | Active level | Function |
0 |
low | Power button pressed |
1 |
low | Reset/install button pressed |
4 |
high | H/W version bit 0 |
5 |
high | H/W version bit 1 |
6 |
high | H/W version bit 2 |
7 |
high | H/W version bit 3 |
nhpow
attaches automatically for all
NH-230/231 compatible products:
nhpow
driver first appeared in
NetBSD 6.0.
nhpow
driver was written by Frank
Wille.
January 15, 2012 | NetBSD 9.4 |