From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcos Paulo de souza Subject: Re: ACPI defined devices not showing up under /sys/bus/platform/devices Date: Fri, 19 Sep 2014 08:51:05 -0300 Message-ID: <541C18A9.2030505@gmail.com> References: <541ACA3B.3070309@redhat.com> <20140918140106.GU10854@lahna.fi.intel.com> <541B455C.4000601@redhat.com> <541B4870.2010906@gmail.com> <20140919084707.GB10854@lahna.fi.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-qc0-f180.google.com ([209.85.216.180]:39863 "EHLO mail-qc0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756485AbaISLvI (ORCPT ); Fri, 19 Sep 2014 07:51:08 -0400 Received: by mail-qc0-f180.google.com with SMTP id m20so2803689qcx.25 for ; Fri, 19 Sep 2014 04:51:08 -0700 (PDT) In-Reply-To: <20140919084707.GB10854@lahna.fi.intel.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Mika Westerberg Cc: Hans de Goede , linux-acpi Another info, On 09/19/2014 05:47 AM, Mika Westerberg wrote: > On Thu, Sep 18, 2014 at 06:02:40PM -0300, Marcos Paulo de souza wrote: >> 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). > That just means that your BIOS has disabled these devices. Unless there > is a menu somewhere in BIOS setup to enable these, there is nothing we > can do in the kernel to make them appear. When I removed Windows, I did a mistake removing the EFI partition. I didn't boot my Fedora. After that, I created a new EFI partition with Anaconda. Maybe this can related to the problem? > >>>> 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. > OK. So I think that this particular machine, either does not have Intel > LPSS (it is not Haswell-LP) or the devices have been deliberately > disabled for some reason.