1. 22 Aug, 2014 2 commits
  2. 20 Aug, 2014 3 commits
  3. 18 Aug, 2014 1 commit
    • Geert Uytterhoeven's avatar
      pwm: Fix period and polarity in pwm_get() for non-perfect matches · d717ea73
      Geert Uytterhoeven authored
      If pwm_get() finds a look-up entry with a perfect match (both dev_id and
      con_id match), the loop is aborted, and "p" still points to the correct
      struct pwm_lookup.
      
      If only an entry with a matching dev_id or con_id is found, the loop
      terminates after traversing the whole list, and "p" now points to
      arbitrary memory, not part of the pwm_lookup list.
      Then pwm_set_period() and pwm_set_polarity() will set random values for
      period resp. polarity.
      
      To fix this, save period and polarity when finding a new best match,
      just like is done for chip (for the provider) and index.
      
      This fixes the LCD backlight on r8a7740/armadillo-legacy, which was fed
      period 0 and polarity -1068821144 instead of 33333 resp. 1.
      
      Fixes: 3796ce1d ("pwm: add period and polarity to struct pwm_lookup")
      Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarThierry Reding <thierry.reding@gmail.com>
      d717ea73
  4. 16 Aug, 2014 34 commits