• Dmitry Torokhov's avatar
    Input: trackpoint - only expose supported controls for Elan, ALPS and NXP · 2a924d71
    Dmitry Torokhov authored
    
    
    The newer trackpoints from ALPS, Elan and NXP implement a very limited
    subset of extended commands and controls that the original trackpoints
    implemented, so we should not be exposing not working controls in sysfs.
    The newer trackpoints also do not implement "Power On Reset" or "Read
    Extended Button Status", so we should not be using these commands during
    initialization.
    
    While we are at it, let's change "unsigned char" to u8 for byte data or
    bool for booleans and use better suited error codes instead of -1.
    
    Cc: stable@vger.kernel.org
    Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
    2a924d71
trackpoint.h 4.99 KB