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From 4dbd55cb96ca68e96e9b5f4b38891305c5ef1b13 Mon Sep 17 00:00:00 2001
From: mwilliams03 <mark.mwilliams@gmail.com>
Date: Sun, 18 Oct 2015 17:07:24 -0700
Subject: [PATCH] New overlay for PiScreen2r
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 14 +++
arch/arm/boot/dts/overlays/piscreen2r-overlay.dts | 100 ++++++++++++++++++++++
3 files changed, 115 insertions(+)
create mode 100644 arch/arm/boot/dts/overlays/piscreen2r-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -35,6 +35,7 @@ dtb-$(RPI_DT_OVERLAYS) += mcp2515-can1-o
dtb-$(RPI_DT_OVERLAYS) += mmc-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += mz61581-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += piscreen-overlay.dtb
+dtb-$(RPI_DT_OVERLAYS) += piscreen2r-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += pitft28-resistive-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += pps-gpio-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += pwm-overlay.dtb
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -425,6 +425,20 @@ Params: speed Display
xohms Touchpanel sensitivity (X-plate resistance)
+Name: piscreen2r
+Info: PiScreen 2 with resistive TP display by OzzMaker.com
+Load: dtoverlay=piscreen2r,<param>=<val>
+Params: speed Display SPI bus speed
+
+ rotate Display rotation {0,90,180,270}
+
+ fps Delay between frame updates
+
+ debug Debug output level {0-7}
+
+ xohms Touchpanel sensitivity (X-plate resistance)
+
+
Name: pitft28-resistive
Info: Adafruit PiTFT 2.8" resistive touch screen
Load: dtoverlay=pitft28-resistive,<param>=<val>
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/piscreen2r-overlay.dts
@@ -0,0 +1,100 @@
+ /*
+ * Device Tree overlay for PiScreen2 3.5" TFT with resistive touch by Ozzmaker.com
+ *
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
+
+ fragment@0 {
+ target = <&spi0>;
+ __overlay__ {
+ status = "okay";
+
+ spidev@0{
+ status = "disabled";
+ };
+
+ spidev@1{
+ status = "disabled";
+ };
+ };
+ };
+
+ fragment@1 {
+ target = <&gpio>;
+ __overlay__ {
+ piscreen2_pins: piscreen2_pins {
+ brcm,pins = <17 25 24 22>;
+ brcm,function = <0 1 1 1>; /* in out out out */
+ };
+ };
+ };
+
+ fragment@2 {
+ target = <&spi0>;
+ __overlay__ {
+ /* needed to avoid dtc warning */
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ piscreen2: piscreen2@0{
+ compatible = "ilitek,ili9486";
+ reg = <0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&piscreen2_pins>;
+ bgr;
+ spi-max-frequency = <64000000>;
+ rotate = <90>;
+ fps = <30>;
+ buswidth = <8>;
+ regwidth = <16>;
+ txbuflen = <32768>;
+ reset-gpios = <&gpio 25 0>;
+ dc-gpios = <&gpio 24 0>;
+ led-gpios = <&gpio 22 1>;
+ debug = <0>;
+
+ init = <0x10000b0 0x00
+ 0x1000011
+ 0x20000ff
+ 0x100003a 0x55
+ 0x1000036 0x28
+ 0x10000c0 0x11 0x09
+ 0x10000c1 0x41
+ 0x10000c5 0x00 0x00 0x00 0x00
+ 0x10000b6 0x00 0x02
+ 0x10000f7 0xa9 0x51 0x2c 0x2
+ 0x10000be 0x00 0x04
+ 0x10000e9 0x00
+ 0x1000011
+ 0x1000029>;
+
+ };
+
+ piscreen2_ts: piscreen2-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,swap-xy;
+ ti,x-plate-ohms = /bits/ 16 <100>;
+ ti,pressure-max = /bits/ 16 <255>;
+ };
+ };
+ };
+ __overrides__ {
+ speed = <&piscreen2>,"spi-max-frequency:0";
+ rotate = <&piscreen2>,"rotate:0";
+ fps = <&piscreen2>,"fps:0";
+ debug = <&piscreen2>,"debug:0";
+ xohms = <&piscreen2_ts>,"ti,x-plate-ohms;0";
+ };
+};
+
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