Hi
I have a COM Express board (Atom e660 and EG20t platform controller).
I have installed an ubuntu distribution with the 3.2.0-29 kernel and
everything is working fine except the i2c stuff. Whatever I throw
(i2cdetect i2cget etc) I get :
i2c_eg20t 0000:05:0c.2: pch_i2c_getack :return-71
in my dmesg. The -71 seems to be EPROTO from reading i2c-eg20t.c but
I'm far from being a kernel hacker so this doesn't mean anything to
me.
Could someone give me a hint on what might be wrong with my setup?
cheers
Mattias
lspci:
00:00.0 Host bridge: Intel Corporation Atom Processor E6xx PCI Host
Bridge #1 (rev 05)
00:01.0 Host bridge: Intel Corporation Atom Processor E6xx
Configuration Unit (rev 02)
00:02.0 VGA compatible controller: Intel Corporation Atom Processor
E6xx Integrated Graphics Controller (rev 05)
00:03.0 Multimedia video controller: Intel Corporation Atom Processor
E6xx Integrated Graphics Controller (rev 02)
00:17.0 PCI bridge: Intel Corporation Atom Processor E6xx PCI Express
Port 1 (rev 02)
00:18.0 PCI bridge: Intel Corporation Atom Processor E6xx PCI Express
Port 2 (rev 02)
00:19.0 PCI bridge: Intel Corporation Atom Processor E6xx PCI Express
Port 3 (rev 02)
00:1a.0 PCI bridge: Intel Corporation Atom Processor E6xx PCI Express
Port 4 (rev 02)
00:1b.0 Audio device: Intel Corporation System Controller Hub (SCH
Poulsbo) HD Audio Controller (rev 02)
00:1f.0 ISA bridge: Intel Corporation Atom Processor E6xx LPC Bridge (rev 02)
04:00.0 PCI bridge: Intel Corporation Platform Controller Hub EG20T
PCI Express Port (rev 01)
05:00.0 Unassigned class [ff00]: Intel Corporation Platform Controller
Hub EG20T Packet Hub (rev 01)
05:00.1 Ethernet controller: Intel Corporation Platform Controller Hub
EG20T Gigabit Ethernet Controller (rev 02)
05:00.2 Unassigned class [ff00]: Intel Corporation Platform Controller
Hub EG20T General Purpose IO Controller (rev 01)
05:02.0 USB controller: Intel Corporation Platform Controller Hub
EG20T USB OHCI Controller #4 (rev 02)
05:02.1 USB controller: Intel Corporation Platform Controller Hub
EG20T USB OHCI Controller #5 (rev 02)
05:02.2 USB controller: Intel Corporation Platform Controller Hub
EG20T USB OHCI Controller #6 (rev 02)
05:02.3 USB controller: Intel Corporation Platform Controller Hub
EG20T USB2 EHCI Controller #2 (rev 02)
05:02.4 USB controller: Intel Corporation Platform Controller Hub
EG20T USB Client Controller (rev 02)
05:04.0 SD Host controller: Intel Corporation Platform Controller Hub
EG20T SDIO Controller #1 (rev 01)
05:04.1 SD Host controller: Intel Corporation Platform Controller Hub
EG20T SDIO Controller #2 (rev 01)
05:06.0 SATA controller: Intel Corporation Platform Controller Hub
EG20T SATA AHCI Controller (rev 02)
05:08.0 USB controller: Intel Corporation Platform Controller Hub
EG20T USB OHCI Controller #1 (rev 02)
05:08.1 USB controller: Intel Corporation Platform Controller Hub
EG20T USB OHCI Controller #2 (rev 02)
05:08.2 USB controller: Intel Corporation Platform Controller Hub
EG20T USB OHCI Controller #3 (rev 02)
05:08.3 USB controller: Intel Corporation Platform Controller Hub
EG20T USB2 EHCI Controller #1 (rev 02)
05:0a.0 Unassigned class [ff00]: Intel Corporation Platform Controller
Hub EG20T DMA Controller #1
05:0a.1 Serial controller: Intel Corporation Platform Controller Hub
EG20T UART Controller 0 (rev 01)
05:0a.2 Serial controller: Intel Corporation Platform Controller Hub
EG20T UART Controller 1
05:0a.3 Serial controller: Intel Corporation Platform Controller Hub
EG20T UART Controller 2
05:0a.4 Serial controller: Intel Corporation Platform Controller Hub
EG20T UART Controller 3
05:0c.0 Unassigned class [ff00]: Intel Corporation Platform Controller
Hub EG20T DMA Controller #2
05:0c.1 Serial bus controller [0c80]: Intel Corporation Platform
Controller Hub EG20T Serial Peripheral Interface Bus
05:0c.2 Serial bus controller [0c80]: Intel Corporation Platform
Controller Hub EG20T I2C Controller
05:0c.3 CANBUS: Intel Corporation Platform Controller Hub EG20T
Controller Area Network (CAN) Controller
05:0c.4 Unassigned class [ff00]: Intel Corporation Platform Controller
Hub EG20T IEEE 1588 Hardware Assist (rev 01)
lsmod:
Module Size Used by
i2c_dev 13199 0
i2c_smbus 13016 0
i2c_eg20t 17739 0
vesafb 13516 1
snd_hda_codec_analog 75395 1
usbhid 41906 0
hid 77367 1 usbhid
pch_can 17878 0
can_dev 14748 1 pch_can
snd_hda_intel 32765 0
snd_hda_codec 109562 2 snd_hda_codec_analog,snd_hda_intel
snd_hwdep 13276 1 snd_hda_codec
pch_phub 13207 0
gpio_pch 13126 0
snd_pcm 80845 2 snd_hda_intel,snd_hda_codec
snd_timer 28931 1 snd_pcm
snd 62064 6
snd_hda_codec_analog,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
soundcore 14635 1 snd
snd_page_alloc 14108 2 snd_hda_intel,snd_pcm
lpc_sch 12720 0
shpchp 32325 0
mac_hid 13077 0
lp 17455 0
parport 40930 1 lp
sdhci_pci 18324 0
sdhci 28241 1 sdhci_pci
pch_gbe 38415 0
relevant dmesg messages (imho):
...
[ 0.342340] i2c-core: driver [aat2870] using legacy suspend method
[ 0.342360] i2c-core: driver [aat2870] using legacy resume method
...
[ 209.289290] i2c_eg20t 0000:05:0c.2: PCI INT C -> GSI 17 (level,
low) -> IRQ 17 #modprobe i2c-eg20t
[ 255.881124] i2c /dev entries driver
#modprobe i2c-dev
[ 294.250132] i2c_eg20t 0000:05:0c.2: pch_i2c_getack :return-71
#i2cdetect 0
... more than 100 of these
[ 294.704387] i2c_eg20t 0000:05:0c.2: pch_i2c_getack :return-71
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