add backlight control to rpi-display overlay

diff --git a/arch/arm/boot/dts/overlays/README b/arch/arm/boot/dts/overlays/README
index a1a46deea45be26be05909892fca38fc05a65893..f876876eb982bd4dba79f020f4c88a56416058c3 100644 (file)
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -1305,6 +1305,7 @@ Params: speed                   Display SPI bus speed
         debug                   Debug output level {0-7}
         xohms                   Touchpanel sensitivity (X-plate resistance)
         swapxy                  Swap x and y axis
+        backlight               Change backlight GPIO pin {e.g. 12, 18}
 
 
 Name:   rpi-ft5406

diff --git a/arch/arm/boot/dts/overlays/rpi-display-overlay.dts b/arch/arm/boot/dts/overlays/rpi-display-overlay.dts
index d7e72eef594e08b309ffbaa04f43c68909c08f36..533b5c140b5447a0bcf426fee0a8b321074edb66 100644 (file)
--- a/arch/arm/boot/dts/overlays/rpi-display-overlay.dts
+++ b/arch/arm/boot/dts/overlays/rpi-display-overlay.dts
@@ -79,11 +79,13 @@
                };
        };
        __overrides__ {
-               speed =   <&rpidisplay>,"spi-max-frequency:0";
-               rotate =  <&rpidisplay>,"rotate:0";
-               fps =     <&rpidisplay>,"fps:0";
-               debug =   <&rpidisplay>,"debug:0";
-               xohms =   <&rpidisplay_ts>,"ti,x-plate-ohms;0";
-               swapxy =  <&rpidisplay_ts>,"ti,swap-xy?";
+               speed =     <&rpidisplay>,"spi-max-frequency:0";
+               rotate =    <&rpidisplay>,"rotate:0";
+               fps =       <&rpidisplay>,"fps:0";
+               debug =     <&rpidisplay>,"debug:0";
+               xohms =     <&rpidisplay_ts>,"ti,x-plate-ohms;0";
+               swapxy =    <&rpidisplay_ts>,"ti,swap-xy?";
+               backlight = <&rpidisplay>,"led-gpios:4",
+                           <&rpi_display_pins>,"brcm,pins:0";
        };
 };