If you are not using it, put .reset_gpio = 96 in your board file for the
DSS2 structure. Then echo 1/0 > .../fb0/blank will do the trick to turn
on/off your screen,
Grégoire
On Sun, 2011-02-06 at 21:53 +0400, Elvis Dowson wrote:
> Hi Grant,
> Thanks for the reply.
>
> On Feb 6, 2011, at 9:30 PM, Grant Erickson wrote:
> >
> > The following script should be instructive:
> >
> > device="/sys/devices/platform/pwm-backlight.0/backlight/pwm-backlight.0"
>
> For me, this is located in /sys/class/backlight/beagleboard
>
> and bl_power is located in /sys/class/backlight/beagleboard
>
> > power="${device}/bl_power"
> > brightness="${device}/brightness"
> > max="${device}/max_brightness"
> >
> >
> > disable_backlight () {
> > echo 1 > ${power}
> > }
> >
> > enable_backlight () {
> > echo 0 > ${power}
> > }
>
> I did try
>
> echo 1 > bl_power
>
> but there was no effect. GPIO 96 from the OMAP3503 is physically connected to
> LCD LED backlight enable, which I think is what would be used to turn the
> backlight on/off.
>
> Where can I specify the mapping of GPIO 96 to the bl_power file, so that the
> LCD backlight can be switched off?
>
> Elvis
>
>
>
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