openwrt/target/linux/brcm2708/patches-4.4/0307-dts-add-overlay-for-pitft22.patch

From 56fa6791fbd2021cec1eeb45462b2ad3d1631a05 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petter=20Mab=C3=A4cker?= <petter@technux.se>
Date: Fri, 8 Jan 2016 09:02:44 +0100
Subject: [PATCH 307/381] dts: add overlay for pitft22
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Add the pitft22 overlay from adafruit Adafruit-Pi-Kernel-o-Matic repo:
https://github.com/adafruit/Adafruit-Pi-Kernel-o-Matic

Signed-off-by: Petter Mabäcker <petter@technux.se>
Signed-off-by: Andrei Gherzan <andrei@resin.io>
---
 arch/arm/boot/dts/overlays/Makefile            |  1 +
 arch/arm/boot/dts/overlays/README              | 12 +++++
 arch/arm/boot/dts/overlays/pitft22-overlay.dts | 69 ++++++++++++++++++++++++++
 3 files changed, 82 insertions(+)
 create mode 100644 arch/arm/boot/dts/overlays/pitft22-overlay.dts

--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -51,6 +51,7 @@ dtbo-$(RPI_DT_OVERLAYS) += pi3-disable-b
 dtbo-$(RPI_DT_OVERLAYS) += pi3-miniuart-bt.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += piscreen.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += piscreen2r.dtbo
+dtbo-$(RPI_DT_OVERLAYS) += pitft22.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += pitft28-capacitive.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += pitft28-resistive.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += pps-gpio.dtbo
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -644,6 +644,18 @@ Params: speed                   Display
         xohms                   Touchpanel sensitivity (X-plate resistance)
 
 
+Name:   pitft22
+Info:   Adafruit PiTFT 2.2" screen
+Load:   dtoverlay=pitft22,<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}
+
+
 Name:   pitft28-capacitive
 Info:   Adafruit PiTFT 2.8" capacitive touch screen
 Load:   dtoverlay=pitft28-capacitive,<param>=<val>
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/pitft22-overlay.dts
@@ -0,0 +1,69 @@
+/*
+ * Device Tree overlay for pitft by Adafruit
+ *
+ */
+
+/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__ {
+                        pitft_pins: pitft_pins {
+                                brcm,pins = <25>;
+                                brcm,function = <1>; /* out */
+                                brcm,pull = <0>; /* none */
+                        };
+                };
+        };
+
+        fragment@2 {
+                target = <&spi0>;
+                __overlay__ {
+                        /* needed to avoid dtc warning */
+                        #address-cells = <1>;
+                        #size-cells = <0>;
+
+                        pitft: pitft@0{
+                                compatible = "ilitek,ili9340";
+                                reg = <0>;
+                                pinctrl-names = "default";
+                                pinctrl-0 = <&pitft_pins>;
+
+                                spi-max-frequency = <32000000>;
+                                rotate = <90>;
+                                fps = <25>;
+                                bgr;
+                                buswidth = <8>;
+                                dc-gpios = <&gpio 25 0>;
+                                debug = <0>;
+                        };
+
+                };
+        };
+
+        __overrides__ {
+                speed =   <&pitft>,"spi-max-frequency:0";
+                rotate =  <&pitft>,"rotate:0";
+                fps =     <&pitft>,"fps:0";
+                debug =   <&pitft>,"debug:0";
+        };
+};