arm: dts: update baffinlite dts, add framebuffer and initial touchscr…

…een node

Unfortunately touchscreen bringup still doesn't work (reads get NAK'd.
Might be some kind of GPIO we're forgetting to pull up or somehting.)

arch/arm/boot/dts/bcm23550-baffinlite.dts

@@ -21,6 +21,17 @@
 		reg = <0x80000000 0x3E200000>;
 	};
 
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		simplefb: framebuffer@9e980000 {
+			reg = <0x9e980000 (480 * 800 * 4)>;
+			no-map;
+		};
+	};
+
 	/* Buttons */
 	gpio-keys {
 		compatible = "gpio-keys";
@@ -61,22 +72,24 @@
 		};
 	};
 
-	/* TODO: Framebuffer. This seems to be the correct address, because
-	 *       if you leave it on with the format set to a8b8g8r it fades
-	 *       into black, but with the "correct" setting (as per recovery
-	 *       pixel format in downstream BoardConfig) it stays on the
-	 *       regular Samsung logo screen. Probably would be worth it to
-	 *       dump and analyze the related memory address.
-	 */
 	framebuffer@9e980000 {
 		compatible = "simple-framebuffer";
-		reg = <0x9e980000 0x1000>;
+		reg = <0x9e980000 (480 * 800 * 4)>;
 		width = <480>;
 		height = <800>;
-		stride = <(480 * 5)>;
-		format = "b8g8r8a8";
+		stride = <(480 * 4)>;
+		format = "a8r8g8b8";
 		status = "okay";
 	};
+
+	tsp_avdd_3v3_reg: tsp_avdd_3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "TSP_AVDD_3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&gpio 0 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
 };
 
 &uartb {
@@ -105,17 +118,34 @@
 	clock-frequency = <400000>;
 	status = "okay";
 };
+
 &bsc2 {
 	clock-frequency = <400000>;
 	status = "okay";
 };
+
 &bsc3 {
 	clock-frequency = <400000>;
 	status = "okay";
 };
+
 &bsc4 {
-	clock-frequency = <400000>;
+	clock-frequency = <230000>;
 	status = "okay";
+
+	/* Melfas MMS144 touchscreen, using the mms136 compatible for now */
+	touchscreen@48 {
+		compatible = "melfas,mms136";
+		reg = <0x48>;
+		interrupt-parent = <&gpio>;
+		interrupts = <73 IRQ_TYPE_EDGE_FALLING>;
+		/* AVDD is "analog supply", 2.57-3.47 V */
+		avdd-supply = <&gpldo2_reg>; /* ??? this should be a fixed regulator but it keeps throwing a -517 (EPROBE_DEFER) if i set it to one. how do you even get a probe defer on an always-on fixed regulator??? */
+		/* VDD is "digital supply" 1.71-3.47V */
+		vdd-supply = <&gpldo2_reg>;
+		touchscreen-size-x = <480>;
+		touchscreen-size-y = <800>;
+	};
 };
 
 &pmu_bsc {
@@ -158,6 +188,10 @@
 };
 */
 
+&dma {
+	status = "okay";
+};
+
 #include "bcm59054.dtsi"
 
 &pmu {