1. 23 Mar, 2012 1 commit
    • Kim, Milo's avatar
      backlight: new backlight driver for LP855x devices · 7be865ab
      Kim, Milo authored
      THis driver supports TI LP8550/LP8551/LP8552/LP8553/LP8556 backlight
      The brightness can be controlled by the I2C or PWM input.  The lp855x
      driver provides both modes.  For the PWM control, pwm-specific functions
      can be defined in the platform data.  And some information can be read
      via the sysfs(lp855x device attributes).
      For details, please refer to Documentation/backlight/lp855x-driver.txt.
      [axel.lin@gmail.com: add missing mutex_unlock in lp855x_read_byte() error path]
      [axel.lin@gmail.com: check platform data in lp855x_probe()]
      [axel.lin@gmail.com: small cleanups]
      [dan.carpenter@oracle.com: silence a compiler warning]
      [axel.lin@gmail.com: use id->driver_data to differentiate lp855x chips]
      [akpm@linux-foundation.org: simplify boolean return expression]
      Signed-off-by: default avatarMilo(Woogyom) Kim <milo.kim@ti.com>
      Signed-off-by: default avatarAxel Lin <axel.lin@gmail.com>
      Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
      Cc: Richard Purdie <rpurdie@rpsys.net>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>