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  1. Mar 28, 2014
    • Benjamin Tissoires's avatar
      Input: synaptics - add manual min/max quirk · 421e08c4
      Benjamin Tissoires authored
      
      The new Lenovo Haswell series (-40's) contains a new Synaptics touchpad.
      However, these new Synaptics devices report bad axis ranges.
      Under Windows, it is not a problem because the Windows driver uses RMI4
      over SMBus to talk to the device. Under Linux, we are using the PS/2
      fallback interface and it occurs the reported ranges are wrong.
      
      Of course, it would be too easy to have only one range for the whole
      series, each touchpad seems to be calibrated in a different way.
      
      We can not use SMBus to get the actual range because I suspect the firmware
      will switch into the SMBus mode and stop talking through PS/2 (this is the
      case for hybrid HID over I2C / PS/2 Synaptics touchpads).
      
      So as a temporary solution (until RMI4 land into upstream), start a new
      list of quirks with the min/max manually set.
      
      Signed-off-by: default avatarBenjamin Tissoires <benjamin.tissoires@redhat.com>
      CC: stable@vger.kernel.org
      Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
      421e08c4
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