1. 28 5月, 2016 7 次提交
  2. 06 5月, 2016 3 次提交
  3. 26 4月, 2016 3 次提交
  4. 15 4月, 2016 1 次提交
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      fujitsu-laptop: Support radio LED · 4f62568c
      Michał Kępień 提交于
      Lifebook E734/E744/E754 has a LED which the manual calls "radio
      components indicator".  It should be lit when any radio transmitter is
      enabled.  Its state can be read and set using ACPI (FUNC interface,
      RFKILL method).
      
      Since the Lifebook E734/E744/E754 only has a button (as compared to a
      slider) for enabling/disabling radio transmitters, I believe the LED in
      question is meant to indicate whether all radio transmitters are
      currently on or off.  However, pressing the radio toggle button does not
      automatically change the hardware state of the transmitters: it looks
      like this machine relies on soft rfkill.
      
      As for detecting whether the LED is present on a given machine, I had to
      resort to educated guesswork.  I assumed this LED is present on all
      devices which have a radio toggle button instead of a slider.  My
      Lifebook E744 holds 0x01010001 in BTNI.  By comparing the bits and
      buttons with those of a Lifebook E8420 (BTNI=0x000F0101, has a slider),
      I put my money on bit 24 as the indicator of the radio toggle button
      being present.  Furthermore, bit 24 is also clear on the S7020 which
      does not have the toggle button or an RF LED.
      
      Figuring out how the LED is controlled was more deterministic as all it
      took was decompiling the DSDT and taking a look at method S000 (the
      RFKILL method of the FUNC interface).
      
      The LED control method implemented here is unsuitable for use with
      "heavy" LED triggers, like phy0rx.  Once blinking frequency achieves a
      certain level, the system hangs.
      Signed-off-by: NMichał Kępień <kernel@kempniu.pl>
      [jwoithe: Comment on bit 24 in BTNI, expanded commit msg]
      Signed-off-by: NJonathan Woithe <jwoithe@just42.net>
      [dvhart: Minor style and commit log adjustments]
      Signed-off-by: NDarren Hart <dvhart@linux.intel.com>
      4f62568c
  5. 03 4月, 2016 9 次提交
  6. 02 4月, 2016 17 次提交