Input: ads7846 - handle errors from sysfs
Add sysfs error handling and switch to using attribute groups
to simplify it.
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>
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Add sysfs error handling and switch to using attribute groups
to simplify it.
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>