1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
From cd12f8bd219b60685803c427847909f5151d8143 Mon Sep 17 00:00:00 2001
From: Ondrej Wisniewski <ondrej.wisniewski@gmail.com>
Date: Fri, 6 Nov 2015 15:01:28 +0100
Subject: [PATCH] dts: Added overlay for Adafruit PiTFT 2.8" capacitive touch
screen
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 22 ++++++
.../dts/overlays/pitft28-capacitive-overlay.dts | 88 ++++++++++++++++++++++
3 files changed, 111 insertions(+)
create mode 100644 arch/arm/boot/dts/overlays/pitft28-capacitive-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -36,6 +36,7 @@ dtb-$(RPI_DT_OVERLAYS) += mmc-overlay.dt
dtb-$(RPI_DT_OVERLAYS) += mz61581-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += piscreen-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += piscreen2r-overlay.dtb
+dtb-$(RPI_DT_OVERLAYS) += pitft28-capacitive-overlay.dtb
dtb-$(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
@@ -439,6 +439,28 @@ Params: speed Display
xohms Touchpanel sensitivity (X-plate resistance)
+Name: pitft28-capacitive
+Info: Adafruit PiTFT 2.8" capacitive touch screen
+Load: dtoverlay=pitft28-capacitive,<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}
+
+ touch-sizex Touchscreen size x (default 240)
+
+ touch-sizey Touchscreen size y (default 320)
+
+ touch-invx Touchscreen inverted x axis
+
+ touch-invy Touchscreen inverted y axis
+
+ touch-swapxy Touchscreen swapped x y axis
+
+
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/pitft28-capacitive-overlay.dts
@@ -0,0 +1,88 @@
+/*
+ * Device Tree overlay for Adafruit PiTFT 2.8" capacitive touch screen
+ *
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
+
+ fragment@0 {
+ target = <&spi0>;
+ __overlay__ {
+ status = "okay";
+
+ spidev@0{
+ status = "disabled";
+ };
+ };
+ };
+
+ fragment@1 {
+ target = <&gpio>;
+ __overlay__ {
+ pitft_pins: pitft_pins {
+ brcm,pins = <24 25>;
+ brcm,function = <0 1>; /* in out */
+ brcm,pull = <2 0>; /* pullup 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>;
+ };
+ };
+ };
+
+ fragment@3 {
+ target = <&i2c1>;
+ __overlay__ {
+ /* needed to avoid dtc warning */
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ft6236: ft6236@38 {
+ compatible = "focaltech,ft6236";
+ reg = <0x38>;
+
+ interrupt-parent = <&gpio>;
+ interrupts = <24 2>;
+ touchscreen-size-x = <240>;
+ touchscreen-size-y = <320>;
+ };
+ };
+ };
+
+ __overrides__ {
+ speed = <&pitft>,"spi-max-frequency:0";
+ rotate = <&pitft>,"rotate:0";
+ fps = <&pitft>,"fps:0";
+ debug = <&pitft>,"debug:0";
+ touch-sizex = <&ft6236>,"touchscreen-size-x?";
+ touch-sizey = <&ft6236>,"touchscreen-size-y?";
+ touch-invx = <&ft6236>,"touchscreen-inverted-x?";
+ touch-invy = <&ft6236>,"touchscreen-inverted-y?";
+ touch-swapxy = <&ft6236>,"touchscreen-swapped-x-y?";
+ };
+};
|
