Bug 199253

Summary: Elantech Touchpad ELAN0612 not working
Product: Drivers Reporter: convme (jciesiel)
Component: Input DevicesAssignee: drivers_input-devices
Status: RESOLVED CODE_FIX    
Severity: normal CC: dmitry.torokhov, kai.heng.feng, languitar, librecoder, wsa
Priority: P1    
Hardware: Intel   
OS: Linux   
Kernel Version: v4.16-rc7, v4.15.15, v4.15.14 Subsystem:
Regression: No Bisected commit-id:
Attachments: patch agains stable 4.16.12
Updated patch with signed-off line

Description convme 2018-04-01 17:09:12 UTC 
Touchpad not working on Lenovo v330 14IKB with Elantech ELAN0612 I2C touchpad installed.

dmesg | grep -i elan gives me:

"i2c_hid i2c-ELAN0612:01: i2c-ELAN0612:01 supply vcc not found, using dummy regulator"

xinput does not find any resource matching the touchpad.

Solution, that helped me to get it working was to add an "elan_acpi_id" for this touchpad (ELAN0612) into "/drivers/input/mouse/elan_i2c_core.c" and to recompile the kernel.
Comment 1 Johannes Wienke 2018-05-26 09:08:24 UTC 
Created attachment 276201 [details]
patch agains stable 4.16.12

This patch realizes the proposed changes and makes the touchpad work.
Comment 2 Dmitry Torokhov 2018-05-29 19:21:25 UTC 
Johannes, can you please format patch as outlined in Documentation/SubmittingPatches (add your signed-off-by) and send to linux-input@vger.kernel.org CC dmitry.torokhov@gmail.com and KT Liao <kt.liao@emc.com.tw>

Thanks!
Comment 3 convme 2018-05-30 09:24:32 UTC 
It seems, like there also exists the same problem with Elantech 0618: https://unix.stackexchange.com/a/434655
Comment 4 Johannes Wienke 2018-06-01 09:44:27 UTC 
Created attachment 276289 [details]
Updated patch with signed-off line
Comment 5 Johannes Wienke 2018-06-01 09:51:37 UTC 
Patch is updated and sent via mail.
Comment 6 parham barzegar 2018-06-20 15:42:47 UTC 
Elantech ELAN0618 still doesn't work.
and 'dmesg | grep ELAN' outputs:
i2c_hid i2c-ELAN0618:00: i2c-ELAN0618:00 supply vdd not found, using dummy regulator
Comment 7 Johannes Wienke 2018-06-20 15:43:58 UTC 
Sure, this was a fix for 0612, not 0618.
Comment 8 parham barzegar 2018-06-20 16:09:01 UTC 
Right, I'll compile it after adding ELAN0618 to that file and will see what happens. though due to https://unix.stackexchange.com/questions/427566/touchpad-on-lenovo-v330-thinkpad-v-series-is-not-recognized/434655#434655 it should work.
Comment 9 parham barzegar 2018-06-22 22:45:41 UTC 
It works.(In reply to parham barzegar from comment #8)
> Right, I'll compile it after adding ELAN0618 to that file and will see what
> happens. though due to
> https://unix.stackexchange.com/questions/427566/touchpad-on-lenovo-v330-
> thinkpad-v-series-is-not-recognized/434655#434655 it should work.
Comment 10 parham barzegar 2018-07-13 16:06:13 UTC 
Would someone please do the same for it?
Comment 11 Wolfram Sang 2020-03-22 12:31:01 UTC 
fixes are upstream:

ELAN0612 - e6e7e9cd8eed0e18217c899843bffbe8c7dae564
ELAN0618 - 8938fc7b8fe9ccfa11751ead502a8d385b607967