[PATCH 11/11] ARM: bcm2835: Enable the Raspberry Pi touchscreen panel.

[Eric Anholt]

This commit is not intended to be merged.  Instead we will use
overlays to enable the panel, and this commit is just a demo of how
things get wired up.

Signed-off-by: Eric Anholt <eric at anholt.net>
---
 arch/arm/boot/dts/bcm283x.dtsi | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/bcm283x.dtsi b/arch/arm/boot/dts/bcm283x.dtsi
index 82a4eccfb3d8..e96d0f29759a 100644
--- a/arch/arm/boot/dts/bcm283x.dtsi
+++ b/arch/arm/boot/dts/bcm283x.dtsi
@@ -286,7 +286,12 @@
 					     "dsi1_ddr2",
 					     "dsi1_ddr";
 
-			status = "disabled";
+			pitouchscreen: panel at 0 {
+				compatible = "raspberrypi,touchscreen";
+				reg = <0>;
+
+				raspberrypi,touchscreen-bridge = <&pitouchscreen_bridge>;
+			};
 		};
 
 		i2c1: i2c at 7e804000 {
@@ -346,6 +351,29 @@
 		vc4: gpu {
 			compatible = "brcm,bcm2835-vc4";
 		};
+
+		i2c_dsi: i2c {
+			/* We have to use i2c-gpio because the
+			 * firmware is also polling another device
+			 * using the only hardware I2C bus that could
+			 * connect to these pins.
+			 */
+			compatible = "i2c-gpio";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			gpios = <&gpio 28 0
+				 &gpio 29 0>;
+
+			pitouchscreen_bridge: bridge at 45 {
+				compatible = "raspberrypi,touchscreen-bridge-i2c";
+				reg = <0x45>;
+			};
+
+			pitouchscreen_touch: bridge at 38 {
+				compatible = "raspberrypi,touchscreen-ts-i2c";
+				reg = <0x38>;
+			};
+		};
 	};
 
 	clocks {
-- 
2.11.0