1. 6ca142a pwm: sysfs: Convert to use ATTRIBUTE_GROUPS macro by Axel Lin · 11 years ago
  2. 9da0175 pwm: convert class code to use dev_groups by Greg Kroah-Hartman · 11 years ago
  3. 76abbdde pwm: Add sysfs interface by H Hartley Sweeten · 12 years ago