diff options
| author |   KT Liao <kt.liao@emc.com.tw> | 2016-12-12 11:03:42 -0800 |
|---|---|---|
| committer |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2017-05-11 18:00:32 -0700 |
| commit | d899520b0431e70279bfb5066ecb6dc91d0b7072 (patch) | |
| tree | 2aa62a5a203049255683f525bc58f865673976e5 /drivers/input/mouse | |
| parent | Input: elan_i2c - add support for fetching chip type on newer hardware (diff) | |
| download | linux-dev-d899520b0431e70279bfb5066ecb6dc91d0b7072.tar.xz linux-dev-d899520b0431e70279bfb5066ecb6dc91d0b7072.zip | |
Input: elantech - force relative mode on a certain module
One of Elan modules with sample version is 0x74 and hw_version is 0x03 has
a bug in absolute mode implementation, so let it run in default PS/2
relative mode.
Signed-off-by: KT Liao <kt.liao@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/mouse')
| -rw-r--r-- | drivers/input/mouse/elantech.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c index efc8ec342351..3dbab0727376 100644 --- a/drivers/input/mouse/elantech.c +++ b/drivers/input/mouse/elantech.c @@ -1687,6 +1687,17 @@ int elantech_init(struct psmouse *psmouse) etd->samples[0], etd->samples[1], etd->samples[2]); } + if (etd->samples[1] == 0x74 && etd->hw_version == 0x03) { + /* + * This module has a bug which makes absolute mode + * unusable, so let's abort so we'll be using standard + * PS/2 protocol. + */ + psmouse_info(psmouse, + "absolute mode broken, forcing standard PS/2 protocol\n"); + goto init_fail; + } + if (elantech_set_absolute_mode(psmouse)) { psmouse_err(psmouse, "failed to put touchpad into absolute mode.\n"); |