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

[Marcos Paulo de souza <marcos.souza.org@gmail.com>]

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