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| author |   Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2018-05-22 17:28:23 -0700 |
|---|---|---|
| committer |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2018-05-23 16:49:22 -0700 |
| commit | 21c48dbde0944e3d52468008321900af3bdafcf1 (patch) | |
| tree | 076300cb80f45799824b1f550fe04bdf9a3c8983 /drivers/input/mouse/psmouse-base.c | |
| parent | Input: elantech - query the resolution in query_info (diff) | |
| download | linux-dev-21c48dbde0944e3d52468008321900af3bdafcf1.tar.xz linux-dev-21c48dbde0944e3d52468008321900af3bdafcf1.zip | |
Input: elantech - add support for SMBus devices
Many of the Elantech devices are connected through PS/2 and a different
bus (SMBus or plain I2C).
To not break any existing device, we only enable SMBus based
on a module parameter. If some laptops require the quirk to
be set, we will have to rely on a list of PNPIds or MDI matching
to individually expose those hardware over SMBus.
the parameter mentioned above is elantech_smbus from the psmouse
module.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: KT Liao <kt.liao@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/mouse/psmouse-base.c')
| -rw-r--r-- | drivers/input/mouse/psmouse-base.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c index 8900c3166ebf..5ff5b1952be0 100644 --- a/drivers/input/mouse/psmouse-base.c +++ b/drivers/input/mouse/psmouse-base.c @@ -856,7 +856,17 @@ static const struct psmouse_protocol psmouse_protocols[] = { .name = "ETPS/2", .alias = "elantech", .detect = elantech_detect, - .init = elantech_init, + .init = elantech_init_ps2, + }, +#endif +#ifdef CONFIG_MOUSE_PS2_ELANTECH_SMBUS + { + .type = PSMOUSE_ELANTECH_SMBUS, + .name = "ETSMBus", + .alias = "elantech-smbus", + .detect = elantech_detect, + .init = elantech_init_smbus, + .smbus_companion = true, }, #endif #ifdef CONFIG_MOUSE_PS2_SENTELIC @@ -1158,8 +1168,13 @@ static int psmouse_extensions(struct psmouse *psmouse, /* Try Elantech touchpad */ if (max_proto > PSMOUSE_IMEX && psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH, - &max_proto, set_properties, true)) { - return PSMOUSE_ELANTECH; + &max_proto, set_properties, false)) { + if (!set_properties) + return PSMOUSE_ELANTECH; + + ret = elantech_init(psmouse); + if (ret >= 0) + return ret; } if (max_proto > PSMOUSE_IMEX) { |