Hi Simon, I'm afraid you added nodes in the wrong places when applying the patch to salvator-x.dtsi :-( Please see below. On Thursday 27 Apr 2017 17:43:56 Laurent Pinchart wrote: > Hi Ulrich, > > Thank you for the patch. > > On Thursday 27 Apr 2017 16:37:39 Ulrich Hecht wrote: > > The panel backlight is controlled through a GPIO and a PWM channel. > > > > Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@xxxxxxxxx> > > Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > > > --- > > > > arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts | 22 ++++++++++++++++ > > 1 file changed, 22 insertions(+) > > > > diff --git a/arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts > > b/arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts index > > 14d9e51..abda84c > > 100644 > > --- a/arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts > > +++ b/arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts > > @@ -133,6 +133,11 @@ > > function = "i2c2"; > > }; > > > > + pwm1_pins: pwm { > > + groups = "pwm1_a"; > > + function = "pwm1"; > > + }; > > + This is alphabetically ordered here and isn't anymore in your devel branch. > > sdhi0_pins: sd0 { > > groups = "sdhi0_data4", "sdhi0_ctrl"; > > function = "sdhi0"; > > @@ -183,6 +188,16 @@ > > interrupt-parent = <&gpio2>; > > interrupts = <11 IRQ_TYPE_LEVEL_LOW>; > > }; > > + > > + backlight: backlight { > > + compatible = "pwm-backlight"; > > + pwms = <&pwm1 0 50000>; > > + > > + brightness-levels = <256 128 64 16 8 4 0>; > > + default-brightness-level = <6>; > > + > > + enable-gpios = <&gpio6 7 GPIO_ACTIVE_HIGH>; > > + }; The backlight node needs to be added as a child of the root node, while you've added it to the DU node in your devel branch. > > }; > > > > &extal_clk { > > @@ -235,6 +250,13 @@ > > status = "okay"; > > }; > > > > +&pwm1 { > > + pinctrl-0 = <&pwm1_pins>; > > + pinctrl-names = "default"; > > + > > + status = "okay"; > > +}; > > + This is alphabetically ordered here and isn't anymore in your devel branch. Can you rebase your devel branch to fix this ? > > &scif1 { > > pinctrl-0 = <&scif1_pins>; > > pinctrl-names = "default"; -- Regards, Laurent Pinchart