--- /dev/null
+From 877d2ad66da4c7aba2db0ecb394a07a19ac2e374 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
projects / openwrt / staging / yousong.git / blobdiff