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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
From a0cc0a16b17996107a6dd712de9031a7bb7d0b34 Mon Sep 17 00:00:00 2001
From: Scott Ellis <scott@jumpnowtek.com>
Date: Tue, 27 Sep 2016 04:29:00 -0400
Subject: [PATCH] Add Adafruit pitft35 touchscreen support (#1657)
The dts comes from the Adafruit repository
https://github.com/adafruit/Adafruit-Pi-Kernel-o-Matic/blob/pitft/pitft35r-overlay.dts
Reformatted slightly to match conventions in the pitft28-resistive-overlay.
Signed-off-by: Scott Ellis <scott@jumpnowtek.com>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 12 ++
.../dts/overlays/pitft35-resistive-overlay.dts | 121 +++++++++++++++++++++
arch/arm/configs/bcm2709_defconfig | 1 +
arch/arm/configs/bcmrpi_defconfig | 1 +
5 files changed, 136 insertions(+)
create mode 100644 arch/arm/boot/dts/overlays/pitft35-resistive-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -65,6 +65,7 @@ dtbo-$(RPI_DT_OVERLAYS) += piscreen2r.dt
dtbo-$(RPI_DT_OVERLAYS) += pitft22.dtbo
dtbo-$(RPI_DT_OVERLAYS) += pitft28-capacitive.dtbo
dtbo-$(RPI_DT_OVERLAYS) += pitft28-resistive.dtbo
+dtbo-$(RPI_DT_OVERLAYS) += pitft35-resistive.dtbo
dtbo-$(RPI_DT_OVERLAYS) += pps-gpio.dtbo
dtbo-$(RPI_DT_OVERLAYS) += pwm.dtbo
dtbo-$(RPI_DT_OVERLAYS) += pwm-2chan.dtbo
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -854,6 +854,18 @@ Params: speed Display
debug Debug output level {0-7}
+Name: pitft35-resistive
+Info: Adafruit PiTFT 3.5" resistive touch screen
+Load: dtoverlay=pitft35-resistive,<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: pps-gpio
Info: Configures the pps-gpio (pulse-per-second time signal via GPIO).
Load: dtoverlay=pps-gpio,<param>=<val>
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/pitft35-resistive-overlay.dts
@@ -0,0 +1,121 @@
+/*
+ * Device Tree overlay for Adafruit PiTFT 3.5" resistive touch screen
+ *
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
+
+ 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__ {
+ pitft_pins: pitft_pins {
+ brcm,pins = <24 25>;
+ brcm,function = <0 1>; /* in out */
+ brcm,pull = <2 0>; /* pullup none */
+ };
+ };
+ };
+
+ fragment@4 {
+ target = <&spi0>;
+ __overlay__ {
+ /* needed to avoid dtc warning */
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ pitft: pitft@0{
+ compatible = "himax,hx8357d";
+ 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>;
+ };
+
+ pitft_ts@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "st,stmpe610";
+ reg = <1>;
+
+ spi-max-frequency = <500000>;
+ irq-gpio = <&gpio 24 0x2>; /* IRQF_TRIGGER_FALLING */
+ interrupts = <24 2>; /* high-to-low edge triggered */
+ interrupt-parent = <&gpio>;
+ interrupt-controller;
+
+ stmpe_touchscreen {
+ compatible = "st,stmpe-ts";
+ st,sample-time = <4>;
+ st,mod-12b = <1>;
+ st,ref-sel = <0>;
+ st,adc-freq = <2>;
+ st,ave-ctrl = <3>;
+ st,touch-det-delay = <4>;
+ st,settling = <2>;
+ st,fraction-z = <7>;
+ st,i-drive = <0>;
+ };
+
+ stmpe_gpio: stmpe_gpio {
+ #gpio-cells = <2>;
+ compatible = "st,stmpe-gpio";
+ /*
+ * only GPIO2 is wired/available
+ * and it is wired to the backlight
+ */
+ st,norequest-mask = <0x7b>;
+ };
+ };
+ };
+ };
+
+ fragment@5 {
+ target-path = "/soc";
+ __overlay__ {
+ backlight {
+ compatible = "gpio-backlight";
+ gpios = <&stmpe_gpio 2 0>;
+ default-on;
+ };
+ };
+ };
+
+ __overrides__ {
+ speed = <&pitft>,"spi-max-frequency:0";
+ rotate = <&pitft>,"rotate:0";
+ fps = <&pitft>,"fps:0";
+ debug = <&pitft>,"debug:0";
+ };
+};
--- a/arch/arm/configs/bcm2709_defconfig
+++ b/arch/arm/configs/bcm2709_defconfig
@@ -1116,6 +1116,7 @@ CONFIG_FB_TFT_BD663474=m
CONFIG_FB_TFT_HX8340BN=m
CONFIG_FB_TFT_HX8347D=m
CONFIG_FB_TFT_HX8353D=m
+CONFIG_FB_TFT_HX8357D=m
CONFIG_FB_TFT_ILI9163=m
CONFIG_FB_TFT_ILI9320=m
CONFIG_FB_TFT_ILI9325=m
--- a/arch/arm/configs/bcmrpi_defconfig
+++ b/arch/arm/configs/bcmrpi_defconfig
@@ -1123,6 +1123,7 @@ CONFIG_FB_TFT_BD663474=m
CONFIG_FB_TFT_HX8340BN=m
CONFIG_FB_TFT_HX8347D=m
CONFIG_FB_TFT_HX8353D=m
+CONFIG_FB_TFT_HX8357D=m
CONFIG_FB_TFT_ILI9163=m
CONFIG_FB_TFT_ILI9320=m
CONFIG_FB_TFT_ILI9325=m
|
