root@mobilepc:/sys/bus/pnp/devices/00:02# ls -lR
.:
total 0
lrwxrwxrwx 1 root root    0 2007-07-16 11:59 bus -> ../../../bus/pnp
lrwxrwxrwx 1 root root    0 2007-07-16 11:59 driver -> ../../../bus/pnp/drivers/serial
-r--r--r-- 1 root root 4096 2007-07-16 11:59 id
-r--r--r-- 1 root root 4096 2007-07-16 11:59 options
drwxr-xr-x 2 root root    0 2007-07-16 12:02 power
-rw-r--r-- 1 root root 4096 2007-07-16 11:59 resources
lrwxrwxrwx 1 root root    0 2007-07-16 11:59 subsystem -> ../../../bus/pnp
lrwxrwxrwx 1 root root    0 2007-07-16 11:59 tty:ttyS0 -> ../../../class/tty/ttyS0
--w------- 1 root root 4096 2007-07-16 11:59 uevent

./power:
total 0
-rw-r--r-- 1 root root 0 2007-07-16 12:02 state
-rw-r--r-- 1 root root 0 2007-07-16 12:02 wakeup

root@mobilepc:/sys/bus/pnp/devices/00:02# cat id
PNP0501
PNP0500
root@mobilepc:/sys/bus/pnp/devices/00:02# cat options
Dependent: 01 - Priority acceptable
   port 0x3f8-0x3f8, align 0x0, size 0x8, 16-bit address decoding
   irq 4 High-Edge
Dependent: 02 - Priority acceptable
   port 0x2f8-0x2f8, align 0x0, size 0x8, 16-bit address decoding
   irq 3 High-Edge
Dependent: 03 - Priority acceptable
   port 0x3e8-0x3e8, align 0x0, size 0x8, 16-bit address decoding
   irq 4 High-Edge
Dependent: 04 - Priority acceptable
   port 0x2e8-0x2e8, align 0x0, size 0x8, 16-bit address decoding
   irq 3 High-Edge

root@mobilepc:/sys/bus/pnp/devices/00:02# cat resources
state = active
io 0x3f8-0x3ff
irq 4

root@mobilepc:/sys/bus/pnp/devices/00:02# cat power/state
0

root@mobilepc:/sys/bus/pnp/devices/00:02# cat power/wakeup

root@mobilepc:/sys/bus/pnp/devices/00:02#