1 files changed, 93 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/overlays/hy28a-overlay.dts b/arch/arm/boot/dts/overlays/hy28a-overlay.dts
new file mode 100644
index 000000000000..aa6463e6e749
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/hy28a-overlay.dts
@@ -0,0 +1,93 @@
+/*
+ * Device Tree overlay for HY28A display
+ *
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2835";
+
+	fragment@0 {
+		target = <&spi0>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@1 {
+		target = <&spidev0>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
+
+	fragment@2 {
+		target = <&spidev1>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
+
+	fragment@3 {
+		target = <&gpio>;
+		__overlay__ {
+			hy28a_pins: hy28a_pins {
+				brcm,pins = <17 25 18>;
+				brcm,function = <0 1 1>; /* in out out */
+			};
+		};
+	};
+
+	fragment@4 {
+		target = <&spi0>;
+		__overlay__ {
+			/* needed to avoid dtc warning */
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			hy28a: hy28a@0{
+				compatible = "ilitek,ili9320";
+				reg = <0>;
+				pinctrl-names = "default";
+				pinctrl-0 = <&hy28a_pins>;
+
+				spi-max-frequency = <32000000>;
+				spi-cpol;
+				spi-cpha;
+				rotate = <270>;
+				bgr;
+				fps = <50>;
+				buswidth = <8>;
+				startbyte = <0x70>;
+				reset-gpios = <&gpio 25 0>;
+				led-gpios = <&gpio 18 1>;
+				debug = <0>;
+			};
+
+			hy28a_ts: hy28a-ts@1 {
+				compatible = "ti,ads7846";
+				reg = <1>;
+
+				spi-max-frequency = <2000000>;
+				interrupts = <17 2>; /* high-to-low edge triggered */
+				interrupt-parent = <&gpio>;
+				pendown-gpio = <&gpio 17 0>;
+				ti,x-plate-ohms = /bits/ 16 <100>;
+				ti,pressure-max = /bits/ 16 <255>;
+			};
+		};
+	};
+	__overrides__ {
+		speed =		<&hy28a>,"spi-max-frequency:0";
+		rotate =	<&hy28a>,"rotate:0";
+		fps =		<&hy28a>,"fps:0";
+		debug =		<&hy28a>,"debug:0";
+		xohms =		<&hy28a_ts>,"ti,x-plate-ohms;0";
+		resetgpio =	<&hy28a>,"reset-gpios:4",
+				<&hy28a_pins>, "brcm,pins:4";
+		ledgpio =	<&hy28a>,"led-gpios:4",
+				<&hy28a_pins>, "brcm,pins:8";
+	};
+};