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Revert "staging: nvec: ps2: change serio type to passthrough"

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commit 17c1c9ba15b238ef79b51cf40d855c05b58d5934 upstream.

This reverts commit 36b30d6138.

This is necessary to detect paz00 (ac100) touchpad properly as one
speaking ETPS/2 protocol. Without it X.org's synaptics driver doesn't
work as the touchpad is detected as an ImPS/2 mouse instead.

Commit ec6184b1c717b8768122e25fe6d312f609cc1bb4 changed the way
auto-detection is performed on ports marked as pass through and made the
issue apparent.

A pass through port is an additional PS/2 port used to connect a slave
device to a master device that is using PS/2 to communicate with the
host (so slave's PS/2 communication is tunneled over master's PS/2
link). "Synaptics PS/2 TouchPad Interfacing Guide" describes such a
setup (PS/2 PASS-THROUGH OPTION section).

Since paz00's embedded controller is not connected to a PS/2 port
itself, the PS/2 interface it exposes is not a pass-through one.

Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Acked-by: Marc Dietrich <marvin24@gmx.de>
Fixes: 36b30d6138 ("staging: nvec: ps2: change serio type to passthrough")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Paul Fertser 2016-10-27 17:22:09 +03:00 • committed by Greg Kroah-Hartman
parent 729eb8d9f7
commit 4aa859ea59
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/nvec/nvec_ps2.c
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@ -111,7 +111,7 @@ static int nvec_mouse_probe(struct platform_device *pdev)
if (!ser_dev)
return -ENOMEM;
ser_dev->id.type = SERIO_PS_PSTHRU;
ser_dev->id.type = SERIO_8042;
ser_dev->write = ps2_sendcommand;
ser_dev->start = ps2_startstreaming;
ser_dev->stop = ps2_stopstreaming;