ACPI: erinevus redaktsioonide vahel

Allikas: Imre kasutab arvutit
Mine navigeerimisribaleMine otsikasti
418. rida: 418. rida:
 
* io - 0x70 - 0x71
  
* io - 0x70 - 0x71
 
* driver - rtc_cmos
  
* driver - rtc_cmos
  +
  +
udevadmin abil info küsimine
  +
  +
<pre>
  +
root@pve-02:~# udevadm info -a -p /sys/devices/pnp0/00:01
  +
  +
Udevadm info starts with the device specified by the devpath and then
  +
walks up the chain of parent devices. It prints for every device
  +
found, all possible attributes in the udev rules key format.
  +
A rule to match, can be composed by the attributes of the device
  +
and the attributes from one single parent device.
  +
  +
looking at device '/devices/pnp0/00:01':
  +
KERNEL=="00:01"
  +
SUBSYSTEM=="pnp"
  +
DRIVER=="rtc_cmos"
  +
ATTR{id}=="PNP0b00"
  +
ATTR{options}==""
  +
ATTR{power/async}=="disabled"
  +
...
  +
</pre>
   
 
====Klassikaline serial port - COM1====
  
====Klassikaline serial port - COM1====

Redaktsioon: 8. oktoober 2025, kell 01:04

Sissejuhatus

TODO

Mõisted

  • ACPI - advanced configuration and power interface
  • AML - acpi machine language
  • EC - embedder controller
  • SMBus - system management bus
  • GPIO - General Purpose I/O
  • KCS - Keyboard Controller Style

Tööpõhimõte

TODO

  • ACPI - supervisor
  • EC/SMBus/KCS - worker

Misc

Lenovo T460p - Ubuntu

OSI 

root@ubu2110:~# dmesg -T | grep Added
[P sept  21 10:38:30 2025] ACPI: Added _OSI(Module Device)
[P sept  21 10:38:30 2025] ACPI: Added _OSI(Processor Device)
[P sept  21 10:38:30 2025] ACPI: Added _OSI(3.0 _SCP Extensions)
[P sept  21 10:38:30 2025] ACPI: Added _OSI(Processor Aggregator Device)
[P sept  21 10:38:30 2025] ACPI: Added _OSI(Linux-Dell-Video)
[P sept  21 10:38:30 2025] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
[P sept  21 10:38:30 2025] ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics)

acpi aml tabelite (koodi) laadimine (ehk nn acpi-driverid) 

[P sept  21 10:38:30 2025] ACPI: 11 ACPI AML tables successfully acquired and loaded

bus tüübid 

root@ubu2110:~# dmesg -T | grep "ACPI: " | grep regist
[P sept  21 10:38:30 2025] ACPI: bus type PCI registered
[P sept  21 10:38:30 2025] ACPI: bus type USB registered

üsna tüüpiline viga 

root@ubu2110:~# dmesg -T | grep "ACPI: " | grep Bug
[P sept  21 10:38:30 2025] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored

millega saaks tegeleda nt linux kernel ütleb, et ta on windows, iseasi kas see on praktiliselt vajalik 

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi='Windows 2015'"

acpitool abil suhtlemine acpi osakonnaga 

root@ubu2110:~# acpitool -c
  CPU type               : Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz
  Min/Max frequency      : 800/3500 MHz
  Current frequency      : 799 MHz
  Frequency governor     : powersave
  Freq. scaling driver   : intel_pstate
  Cache size             : 2600.000 KB
  Bogomips               : 5199.98
  Bogomips               : 5199.98
  Bogomips               : 5199.98
  Bogomips               : 5199.98
  Bogomips               : 5199.98
  Bogomips               : 5199.98
  Bogomips               : 5199.98
  Bogomips               : 5199.98
  Function Show_CPU_Info : could not read directory /proc/acpi/processor/
  Make sure your kernel has ACPI processor support enabled.

aku 

root@ubu2110:~# acpitool -B
  Battery #1     : present
    Remaining capacity : 15680 mWh, 100.0%
    Design capacity    : 71280 mWh
    Last full capacity : 15680 mWh, 22.00% of design capacity
    Capacity loss      : 78.00%
    Present rate       : 0 mW
    Charging state     : Full
    Battery type       : Li-ion
    Model number       : 45N1777
    Serial number      : 2616

wake up seadmed 

root@ubu2110:~# acpitool -w
   Device	S-state	  Status   Sysfs node
  ---------------------------------------
  1. LID	  S4	*enabled   platform:PNP0C0D:00
  2. SLPB	  S3	*enabled   platform:PNP0C0E:00
  3. IGBE	  S4	*enabled   pci:0000:00:1f.6
  4. PXSX	  S4	*disabled  pci:0000:03:00.0
  5. PXSX	  S4	*disabled
  6. PXSX	  S4	*disabled
  7. PXSX	  S4	*disabled
  8. PXSX	  S4	*disabled  pci:0000:04:00.0
  9. 		*disabled  platform:rtsx_pci_sdmmc.0
  10. PXSX	  S4	*disabled
  11. XHCI	  S3	*enabled   pci:0000:00:14.0

root@ubu2110:~# lspci | grep 00:1f.6
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (2) I219-LM (rev 31)

root@ubu2110:~# dmesg | egrep "PNP0C0D|PNP0C0E"
[    0.323518] input: Lid Switch as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input0
[    0.323573] input: Sleep Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0E:00/input/input1

Lenovo T460p - OpenBSD

TODO

Arvuti käivitumine

Väited, 'ACPI system root node' 

root@ubu2110:~# ls -ld "/sys/devices/LNXSYSTM:00/"*
-r--r--r--  1 root root 4096 okt    7 09:03 /sys/devices/LNXSYSTM:00/hid
drwxr-xr-x  3 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXCPU:00
drwxr-xr-x  3 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXCPU:01
drwxr-xr-x  3 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXCPU:02
drwxr-xr-x  3 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXCPU:03
drwxr-xr-x  3 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXCPU:04
drwxr-xr-x  3 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXCPU:05
drwxr-xr-x  3 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXCPU:06
drwxr-xr-x  3 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXCPU:07
drwxr-xr-x  5 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXPWRBN:00
drwxr-xr-x 23 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00
drwxr-xr-x  4 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:01
-r--r--r--  1 root root 4096 okt    7 09:03 /sys/devices/LNXSYSTM:00/modalias
-r--r--r--  1 root root 4096 okt    7 09:03 /sys/devices/LNXSYSTM:00/path
drwxr-xr-x  2 root root    0 okt    6 19:53 /sys/devices/LNXSYSTM:00/power
lrwxrwxrwx  1 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/subsystem -> ../../bus/acpi
-rw-r--r--  1 root root 4096 okt    5 01:10 /sys/devices/LNXSYSTM:00/uevent

ACPI system bus 

/sys/devices/LNXSYSTM:00/LNXSYBUS:00

ACPI PCI Root Bridge 

root@ubu2110:~# dmesg | grep _OSC
[    0.233413] ACPI: \_PR_.CPU0: _OSC native thermal LVT Acked
[    0.258815] acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI EDR HPX-Type3]
[    0.258963] acpi PNP0A08:00: _OSC: platform does not support [SHPCHotplug PCIeCapability LTR DPC]
[    0.259032] acpi PNP0A08:00: _OSC: not requesting control; platform does not support [PCIeCapability]
[    0.259037] acpi PNP0A08:00: _OSC: OS requested [PCIeHotplug SHPCHotplug PME AER PCIeCapability LTR DPC]
[    0.259041] acpi PNP0A08:00: _OSC: platform willing to grant [PCIeHotplug PME AER]
[    0.259044] acpi PNP0A08:00: _OSC: platform retains control of PCIe features (AE_SUPPORT)

root@ubu2110:~# ls -ld "/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00"/*
-r--r--r--  1 root root 4096 okt    7 09:06 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/adr
drwxr-xr-x 15 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:00
drwxr-xr-x  8 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:01
drwxr-xr-x  7 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:03
drwxr-xr-x  9 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:05
drwxr-xr-x  4 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:18
drwxr-xr-x  5 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:19
drwxr-xr-x  4 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1b
drwxr-xr-x  4 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1d
drwxr-xr-x  4 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1f
drwxr-xr-x  5 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:21
drwxr-xr-x  4 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:23
drwxr-xr-x  3 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:25
drwxr-xr-x 12 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:26
drwxr-xr-x  4 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:2f
drwxr-xr-x  9 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:30
drwxr-xr-x  4 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:49
drwxr-xr-x  4 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:4a
drwxr-xr-x  4 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:4b
-r--r--r--  1 root root 4096 okt    7 09:06 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/hid
drwxr-xr-x  3 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXPOWER:01
drwxr-xr-x  3 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXPOWER:02
drwxr-xr-x  3 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXPOWER:03
drwxr-xr-x 22 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:01
-r--r--r--  1 root root 4096 okt    7 09:06 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/modalias
-r--r--r--  1 root root 4096 okt    7 09:06 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/path
lrwxrwxrwx  1 root root    0 okt    7 09:06 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node -> ../../../pci0000:00
drwxr-xr-x  3 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/PNP0C02:01
drwxr-xr-x  3 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/PNP0C02:02
drwxr-xr-x  2 root root    0 okt    6 19:53 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/power
lrwxrwxrwx  1 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/subsystem -> ../../../../bus/acpi
-rw-r--r--  1 root root 4096 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/uevent
drwxr-xr-x  3 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/wakeup

pci root teises vaates, 'kernel-level PCI device tree' 

root@ubu2110:~# ls -ld /sys/devices/LNXSYSTM\:00/LNXSYBUS\:00/PNP0A08\:00/physical_node/*
drwxr-xr-x  4 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/0000:00:00.0
drwxr-xr-x  7 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/0000:00:01.0
drwxr-xr-x  8 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/0000:00:01.2
drwxr-xr-x 10 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/0000:00:02.0
drwxr-xr-x  8 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/0000:00:14.0
drwxr-xr-x  4 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/0000:00:14.2
drwxr-xr-x 22 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/0000:00:16.0
drwxr-xr-x  9 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/0000:00:17.0
drwxr-xr-x  8 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/0000:00:1c.0
drwxr-xr-x  8 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/0000:00:1c.4
drwxr-xr-x  8 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/0000:00:1f.0
drwxr-xr-x  4 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/0000:00:1f.2
drwxr-xr-x  8 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/0000:00:1f.3
drwxr-xr-x  4 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/0000:00:1f.4
drwxr-xr-x  8 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/0000:00:1f.6
lrwxrwxrwx  1 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/firmware_node -> ../LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00
drwxr-xr-x  3 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/pci_bus
drwxr-xr-x  2 root root    0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/power
-rw-r--r--  1 root root 4096 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/uevent
-r--r--r--  1 root root 4096 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/waiting_for_supplier

ja konkreetne pcie seade 

root@ubu2110:~# udevadm info -a -p /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/physical_node/0000:00:1f.6 | grep -A 3 "looking a"
  looking at device '/devices/pci0000:00/0000:00:1f.6':
    KERNEL=="0000:00:1f.6"
    SUBSYSTEM=="pci"
    DRIVER=="e1000e"
--
  looking at parent device '/devices/pci0000:00':
    KERNELS=="pci0000:00"
    SUBSYSTEMS==""
    DRIVERS==""
root@ubu2110:~#

ning modalias abil seadmega seotud draiveri abil seadme kindlakstegemine 

root@ubu2110:~# cat /sys/devices/LNXSYSTM\:00/LNXSYBUS\:00/PNP0A08\:00/physical_node/0000\:00\:1f.6/modalias
pci:v00008086d000015B7sv000017AAsd00005050bc02sc00i00

root@ubu2110:~# grep v00008086d000015B7sv /lib/modules/5.15.0-140-generic/modules.alias | grep e100
alias pci:v00008086d000015B7sv*sd*bc*sc*i* e1000e

Väited

  • kernel saab hot plug puhul aru seadme id vms väärtuse
  • kernel saadab uevent'i udevd osakonda
  • udevd juhtimisel leitakse üles modalias süsteemi abil sobiv draiver
  • udevd juhtimisel laaditakse draiver ja rakendatakse udevd rules (nt seadme nime vms omaduste kohendamiseks)
  • lisatud seade on user-space programmidele kasutatav
  • systemd juhib udevd osakonda

Misc

non-pci jms tüüpi seadmega seotud info leidmine, nt tpm moodul 

root@ubu2110:~# systool -b platform
Bus = "platform"

  Device = "ACPI0003:00"
  Device = "Fixed MDIO bus.0"
  Device = "LEN0068:00"
  Device = "MSFT0101:00"
  Device = "PNP0103:00"
  Device = "PNP0800:00"
  Device = "PNP0C04:00"
  Device = "PNP0C09:00"
  Device = "PNP0C0A:00"
  Device = "PNP0C0D:00"
  Device = "PNP0C0E:00"
  Device = "PNP0C14:00"
  Device = "PNP0C14:01"
  Device = "PNP0C14:02"
  Device = "alarmtimer.0.auto"
  Device = "coretemp.0"
  Device = "efivars.0"
  Device = "eisa.0"
  Device = "i8042"
  Device = "intel_pmc_core.0"
  Device = "intel_rapl_msr.0"
  Device = "kgdboc"
  Device = "microcode"
  Device = "pcspkr"
  Device = "reg-dummy"
  Device = "regulatory.0"
  Device = "rtc-efi.0"
  Device = "rtsx_pci_sdmmc.0"
  Device = "serial8250"
  Device = "thinkpad_acpi"
  Device = "thinkpad_hwmon"
  Device = "vboxdrv.0"

root@ubu2110:~# find /sys/devices/ -name MSFT0101:00 -ls
     9680      0 drwxr-xr-x   3 root     root            0 okt    5 01:10 /sys/devices/platform/MSFT0101:00
     8004      0 drwxr-xr-x   5 root     root            0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/MSFT0101:00
root@ubu2110:~# udevadm info -a -p /sys/devices/LNXSYSTM:00/LNXSYBUS:00/MSFT0101:00 | grep -A 3 "looking a"
  looking at device '/devices/LNXSYSTM:00/LNXSYBUS:00/MSFT0101:00':
    KERNEL=="MSFT0101:00"
    SUBSYSTEM=="acpi"
    DRIVER=="tpm_crb"
--
  looking at parent device '/devices/LNXSYSTM:00/LNXSYBUS:00':
    KERNELS=="LNXSYBUS:00"
    SUBSYSTEMS=="acpi"
    DRIVERS==""
--
  looking at parent device '/devices/LNXSYSTM:00':
    KERNELS=="LNXSYSTM:00"
    SUBSYSTEMS=="acpi"
    DRIVERS==""

kus

  • saadakse teada, et tpm seadmega tegeleb driver tpm_crb
  • seejuures ei kasutata praktiliselt modalias süsteemi kuna driaver on builtin
root@ubu2110:~# cat /sys/devices/LNXSYSTM\:00/LNXSYBUS\:00/MSFT0101\:00/modalias
acpi:MSFT0101:

root@ubu2110:~# grep tpm_crb /lib/modules/5.15.0-140-generic/modules.alias

root@ubu2110:~# grep tpm_crb /lib/modules/5.15.0-140-generic/modules.builtin
kernel/drivers/char/tpm/tpm_crb.ko

nt toitenupp 

root@ubu2110:~# find /sys/devices/ -name PNP0C0D:00 -ls
     8108      0 drwxr-xr-x   3 root     root            0 okt    5 01:10 /sys/devices/platform/PNP0C0D:00
     6170      0 drwxr-xr-x   5 root     root            0 okt    5 01:10 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00
root@ubu2110:~# udevadm info -a -p  /sys/devices/LNXSYSTM\:00/LNXSYBUS\:00/PNP0C0D\:00 | grep -A 3 "looking at"
  looking at device '/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00':
    KERNEL=="PNP0C0D:00"
    SUBSYSTEM=="acpi"
    DRIVER=="button"
--
  looking at parent device '/devices/LNXSYSTM:00/LNXSYBUS:00':
    KERNELS=="LNXSYBUS:00"
    SUBSYSTEMS=="acpi"
    DRIVERS==""
--
  looking at parent device '/devices/LNXSYSTM:00':
    KERNELS=="LNXSYSTM:00"
    SUBSYSTEMS=="acpi"
    DRIVERS==""

root@ubu2110:~# cat /sys/devices/LNXSYSTM\:00/LNXSYBUS\:00/PNP0C0D\:00/modalias
acpi:PNP0C0D:

root@ubu2110:~# grep button /lib/modules/5.15.0-140-generic/modules.builtin
kernel/drivers/acpi/button.ko

root@ubu2110:~# dmesg | grep PWR
[    0.323534] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input2
[    0.323553] ACPI: button: Power Button [PWRF]

PnP - klassikaline

Nö klassikalised PnP seadmed asuvad pnp nimelisel siinil 

root@pve-02:~# systool -b pnp
Bus = "pnp"

  Device = "00:00"
  Device = "00:01"
  Device = "00:02"
  Device = "00:03"
  Device = "00:04"
  Device = "00:05"

RTC CMOS

Klassikaline RTC CMOS seade 

root@pve-02:~# systool -b pnp -v -d 00:01
Bus = "pnp"

  Device = "00:01"
  Device path = "/sys/devices/pnp0/00:01"
    id                  = "PNP0b00"
    options             =
    resources           = "state = active
io 0x70-0x71"
    uevent              = "DRIVER=rtc_cmos"

kus x86 arhitektuuril on praktilisel alati kasutusel sellised väärtused

  • id - PNP0b00
  • io - 0x70 - 0x71
  • driver - rtc_cmos

udevadmin abil info küsimine 

root@pve-02:~# udevadm info -a -p /sys/devices/pnp0/00:01

Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/devices/pnp0/00:01':
    KERNEL=="00:01"
    SUBSYSTEM=="pnp"
    DRIVER=="rtc_cmos"
    ATTR{id}=="PNP0b00"
    ATTR{options}==""
    ATTR{power/async}=="disabled"
...

Klassikaline serial port - COM1

root@pm60-trt:~# systool -b pnp -v -d 00:03
Bus = "pnp"

  Device = "00:03"
  Device path = "/sys/devices/pnp0/00:03"
    id                  = "PNP0501"
    options             = "Dependent: 00 - Priority preferred
  port 0x3f8-0x3f8, align 0x0, size 0x8, 16-bit address decoding
  irq 4 High-Edge
  dma <none> 8-bit compatible
Dependent: 01 - Priority acceptable
  port 0x3f8-0x3f8, align 0x0, size 0x8, 16-bit address decoding
  irq 4 High-Edge
  dma <none> 8-bit compatible
Dependent: 02 - Priority acceptable
  port 0x2f8-0x2f8, align 0x0, size 0x8, 16-bit address decoding
  irq 3 High-Edge
  dma <none> 8-bit compatible
Dependent: 03 - Priority acceptable
  port 0x3e8-0x3e8, align 0x0, size 0x8, 16-bit address decoding
  irq 4 High-Edge
  dma <none> 8-bit compatible
Dependent: 04 - Priority acceptable
  port 0x2e8-0x2e8, align 0x0, size 0x8, 16-bit address decoding
  irq 3 High-Edge
  dma <none> 8-bit compatible"
    resources           = "state = active
io 0x3f8-0x3ff
irq 4
dma disabled"
    uevent              = "DRIVER=serial"

kus x86 arhitektuuril on praktilisel alati kasutusel sellised väärtused

  • id - PNP0501
  • io - 0x3f8 - 0x3ff
  • driver - serial
  • option - pikk nimekiri nö võimalikest alternatiivsetest lähenemistest

udevadm abil info küsimine 

root@pve-02:~# udevadm info -a -p /sys/devices/pnp0/00:03

Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/devices/pnp0/00:03':
    KERNEL=="00:03"
    SUBSYSTEM=="pnp"
    DRIVER=="serial"
    ATTR{id}=="PNP0501"
    ATTR{power/async}=="disabled"
...

Kasulikud lisamaterjalid

  • TODO
Pärit leheküljelt "https://www.auul.pri.ee/wiki/index.php?title=ACPI&oldid=2478"