• 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
    devices.
    
    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>
    7be865ab
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