Input: elantech - fix protocol errors for some trackpoints in SMBus mode
commit e4c90627 upstream. There are some version of Elan trackpads that send incorrect data when in SMbus mode, unless they are switched to use 0x5f reports instead of standard 0x5e. This patch implements querying device to retrieve chips identifying data, and switching it, when needed to the alternative report. Signed-off-by: Jingle Wu <jingle.wu@emc.com.tw> Link: https://lore.kernel.org/r/20201211071531.32413-1-jingle.wu@emc.com.tw Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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a1d01034
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