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      Input: gpio-keys - add support for disabling gpios through sysfs · 9e3af04f
      Mika Westerberg 提交于
      Now gpio-keys input driver exports 4 new attributes to userland through
      sysfs:
      	/sys/devices/platform/gpio-keys/keys [ro]
      	/sys/devices/platform/gpio-keys/switches [ro]
      	/sys/devices/platform/gpio-keys/disabled_keys [rw]
      	/sys/devices/platform/gpio-keys/disables_switches [rw]
      
      With these attributes, userland program can read which keys and
      switches can be disabled and then disable/enable them as needed.
      Keys and switches are exported as stringified bitmap of codes
      (keycodes or switch codes). For example keys 15, 89, 100, 101,
      102 are exported as: '15,89,100-102'.
      
      Description of the attributes:
      	keys - bitmap of keys which can be disabled
      	switches - bitmap of switches which can be disabled
      	disabled_keys - bitmap of currently disabled keys
      			(bit 1 means disabled, 0 enabled)
      	disabled_switches - bitmap of currently disabled switches
      			(bit 1 means disabled, 0 enabled)
      Signed-off-by: NMika Westerberg <ext-mika.1.westerberg@nokia.com>
      Signed-off-by: NDmitry Torokhov <dtor@mail.ru>
      9e3af04f
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