Re: ACPI defined devices not showing up under /sys/bus/platform/devices

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Hi,

On 09/18/2014 05:49 PM, Hans de Goede wrote:
Hi,

On 09/18/2014 04:01 PM, Mika Westerberg wrote:
On Thu, Sep 18, 2014 at 02:04:11PM +0200, Hans de Goede wrote:
Hi,

I'm trying to help various users with Asus X450 and Asus X550 laptops
to get their touchpad to work:

https://bugzilla.redhat.com/show_bug.cgi?id=1110011

We believe that this touchpad is connected over i2c, using the
i2c-designware-platform driver.

If you look at the DSDT attached there you can clearly see
nodes defines which should lead to e.g. :

/sys/bus/platform/devices/INT33C2:00

Showing up (which should then be bound by i2c-designware-platform).

But nothing is showing up, not a single ACPI defined device shows
up actually:





[root@asusx550 devices]# ll
insgesamt 0
lrwxrwxrwx. 1 root root 0 22. Jul 14:56 alarmtimer -> ../../../devices/platform/alarmtimer
lrwxrwxrwx. 1 root root 0 25. Jul 23:54 asus-nb-wmi -> ../../../devices/platform/asus-nb-wmi
lrwxrwxrwx. 1 root root 0 25. Jul 23:54 coretemp.0 -> ../../../devices/platform/coretemp.0
lrwxrwxrwx. 1 root root 0 22. Jul 14:56 efi-framebuffer.0 -> ../../../devices/platform/efi-framebuffer.0
lrwxrwxrwx. 1 root root 0 22. Jul 14:56 Fixed MDIO bus.0 -> ../../../devices/platform/Fixed MDIO bus.0
lrwxrwxrwx. 1 root root 0 22. Jul 14:56 i8042 -> ../../../devices/platform/i8042
lrwxrwxrwx. 1 root root 0 25. Jul 23:54 iTCO_wdt -> ../../../devices/pci0000:00/0000:00:1f.0/iTCO_wdt
lrwxrwxrwx. 1 root root 0 25. Jul 23:54 microcode -> ../../../devices/platform/microcode
lrwxrwxrwx. 1 root root 0 22. Jul 14:56 pcspkr -> ../../../devices/platform/pcspkr
lrwxrwxrwx. 1 root root 0 25. Jul 23:54 regulatory.0 -> ../../../devices/platform/regulatory.0
lrwxrwxrwx. 1 root root 0 25. Jul 23:54 rtsx_pci_ms.0 -> ../../../devices/pci0000:00/0000:00:1c.2/0000:02:00.0/rtsx_pci_ms.0
lrwxrwxrwx. 1 root root 0 25. Jul 23:54 rtsx_pci_sdmmc.0 -> ../../../devices/pci0000:00/0000:00:1c.2/0000:02:00.0/rtsx_pci_sdmmc.0
lrwxrwxrwx. 1 root root 0 22. Jul 14:56 serial8250 -> ../../../devices/platform/serial8250


Which is weird, since any recent machine usually has at least one or 2
show up.
It depends whether the BIOS has enabled those or not.

If

  # cat /sys/bus/acpi/devices/INT33C2:00/status
  # cat /sys/bus/acpi/devices/INT33C3:00/status

returns 0xf, then the device should be there, otherwise it is not.
Interesting. Marcos, can you give this a try please ?
Hans, both here returned 0. As I said to you, I'm using Fedora in insecure mode (I don't know if this changes anything).

The "status" refers directly shat _STA() ACPI method returns.
Ok, so assuming that Marcos' testing shows it is not enabled,
is there anything we can, could there be some ACPI call to
enable these devs ?

Note that the device could also be in PCI mode, in case lspci should
show it.
Right, it does not show in lspci.

Regards,

Hans

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