On Tue, Jun 07, 2016 at 12:13:49PM +0200, Lothar Waßmann wrote: > 'brightness' is usually an index into a table of duty_cycle values, > where the value at index 0 may well be non-zero > (tegra30-apalis-eval.dts and tegra30-colibri-eval-v3.dts are real-life > examples). > Thus brightness == 0 does not necessarily mean that the PWM output > will be inactive. > Check for 'duty_cycle == 0' rather than 'brightness == 0' to decide > whether to disable the PWM. > > Signed-off-by: Lothar Waßmann <LW@xxxxxxxxxxxxxxxxxxx> > --- > Changes wrt. v1: > - update binding docs to reflect the change > > .../devicetree/bindings/leds/backlight/pwm-backlight.txt | 9 ++++++--- > drivers/video/backlight/pwm_bl.c | 4 ++-- > 2 files changed, 8 insertions(+), 5 deletions(-) Acked-by: Rob Herring <robh@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
