On Sun, Sep 20, 2015 at 8:30 PM, Hans de Goede <hdego...@redhat.com> wrote: > All A13 based q8 formfactor tablets use the same backlight setup, add > a backlight devicetree node for controlling the backlight on these devices. > > Signed-off-by: Hans de Goede <hdego...@redhat.com> > --- > arch/arm/boot/dts/sun5i-q8-common.dtsi | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/arch/arm/boot/dts/sun5i-q8-common.dtsi > b/arch/arm/boot/dts/sun5i-q8-common.dtsi > index 0641d68..76a5204 100644 > --- a/arch/arm/boot/dts/sun5i-q8-common.dtsi > +++ b/arch/arm/boot/dts/sun5i-q8-common.dtsi > @@ -41,11 +41,22 @@ > */ > #include "sunxi-q8-common.dtsi" > > +#include <dt-bindings/pwm/pwm.h> > + > / { > aliases { > serial0 = &uart1; > }; > > + backlight: backlight { > + compatible = "pwm-backlight"; > + pwms = <&pwm 0 50000 PWM_POLARITY_INVERTED>; > + brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>; > + default-brightness-level = <8>; > + /* TODO: backlight uses axp gpio1 as enable pin */ > + /* TODO: backlight is powered by AXP209 DCDC1SW */
There's no DCDC1SW on AXP209. The reference design shows the backlight regulator is powered directly from IPSOUT, but the PWM pullup is powered by LCD-VCC, which itself is enabled by AXP209 GPIO0. Would that be the case, or maybe closer, given we don't have schematics? Regards ChenYu > + }; > + > chosen { > stdout-path = "serial0:115200n8"; > }; > -- > 2.4.3 > -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.