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210 lines
5.2 KiB
Diff
210 lines
5.2 KiB
Diff
From a64595c1bc19752dca712c6cd90692a2a0e7397b Mon Sep 17 00:00:00 2001
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From: Hans-Wilhelm Warlo <5417271+hanswilw@users.noreply.github.com>
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Date: Tue, 16 Oct 2018 18:20:48 +0200
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Subject: [PATCH] Add hy28b 2017 model device tree overlay (#2721)
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The 2017 version of the hy28b display requires a different
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initialisation sequence.
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Signed-off-by: Hans-Wilhelm Warlo <hw@warlo.no>
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---
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arch/arm/boot/dts/overlays/Makefile | 1 +
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arch/arm/boot/dts/overlays/README | 19 +++
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.../boot/dts/overlays/hy28b-2017-overlay.dts | 152 ++++++++++++++++++
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3 files changed, 172 insertions(+)
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create mode 100644 arch/arm/boot/dts/overlays/hy28b-2017-overlay.dts
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--- a/arch/arm/boot/dts/overlays/Makefile
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+++ b/arch/arm/boot/dts/overlays/Makefile
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@@ -49,6 +49,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
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hifiberry-digi-pro.dtbo \
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hy28a.dtbo \
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hy28b.dtbo \
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+ hy28b-2017.dtbo \
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i2c-bcm2708.dtbo \
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i2c-gpio.dtbo \
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i2c-mux.dtbo \
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -770,6 +770,25 @@ Params: speed Display
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ledgpio GPIO used to control backlight
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+Name: hy28b-2017
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+Info: HY28B 2017 version - 2.8" TFT LCD Display Module by HAOYU Electronics
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+ Default values match Texy's display shield
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+Load: dtoverlay=hy28b-2017,<param>=<val>
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+Params: speed Display SPI bus speed
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+
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+ rotate Display rotation {0,90,180,270}
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+
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+ fps Delay between frame updates
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+
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+ debug Debug output level {0-7}
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+
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+ xohms Touchpanel sensitivity (X-plate resistance)
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+
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+ resetgpio GPIO used to reset controller
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+
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+ ledgpio GPIO used to control backlight
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+
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+
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Name: i2c-bcm2708
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Info: Fall back to the i2c_bcm2708 driver for the i2c_arm bus.
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Load: dtoverlay=i2c-bcm2708
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/hy28b-2017-overlay.dts
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@@ -0,0 +1,152 @@
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+/*
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+ * Device Tree overlay for HY28b display shield by Texy.
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+ * Modified for 2017 version with ILI9325 D chip
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+ */
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+
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+/dts-v1/;
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+/plugin/;
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+
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+/ {
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+ compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
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+
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+ fragment@0 {
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+ target = <&spi0>;
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+ __overlay__ {
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+ status = "okay";
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+ };
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+ };
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+
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+ fragment@1 {
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+ target = <&spidev0>;
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+ __overlay__ {
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+ status = "disabled";
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+ };
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+ };
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+
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+ fragment@2 {
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+ target = <&spidev1>;
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+ __overlay__ {
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+ status = "disabled";
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+ };
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+ };
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+
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+ fragment@3 {
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+ target = <&gpio>;
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+ __overlay__ {
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+ hy28b_pins: hy28b_pins {
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+ brcm,pins = <17 25 18>;
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+ brcm,function = <0 1 1>; /* in out out */
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+ };
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+ };
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+ };
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+
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+ fragment@4 {
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+ target = <&spi0>;
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+ __overlay__ {
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+ /* needed to avoid dtc warning */
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+
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+ hy28b: hy28b@0{
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+ compatible = "ilitek,ili9325";
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+ reg = <0>;
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&hy28b_pins>;
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+
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+ spi-max-frequency = <48000000>;
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+ spi-cpol;
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+ spi-cpha;
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+ rotate = <270>;
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+ bgr;
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+ fps = <50>;
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+ buswidth = <8>;
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+ startbyte = <0x70>;
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+ reset-gpios = <&gpio 25 0>;
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+ led-gpios = <&gpio 18 1>;
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+
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+ init = <0x10000e5 0x78F0
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+ 0x1000001 0x0100
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+ 0x1000002 0x0700
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+ 0x1000003 0x1030
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+ 0x1000004 0x0000
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+ 0x1000008 0x0207
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+ 0x1000009 0x0000
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+ 0x100000a 0x0000
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+ 0x100000c 0x0000
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+ 0x100000d 0x0000
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+ 0x100000f 0x0000
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+ 0x1000010 0x0000
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+ 0x1000011 0x0007
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+ 0x1000012 0x0000
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+ 0x1000013 0x0000
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+ 0x1000007 0x0001
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+ 0x2000032
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+ 0x2000032
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+ 0x2000032
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+ 0x2000032
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+ 0x1000010 0x1090
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+ 0x1000011 0x0227
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+ 0x2000032
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+ 0x1000012 0x001f
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+ 0x2000032
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+ 0x1000013 0x1500
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+ 0x1000029 0x0027
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+ 0x100002b 0x000d
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+ 0x2000032
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+ 0x1000020 0x0000
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+ 0x1000021 0x0000
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+ 0x2000032
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+ 0x1000030 0x0000
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+ 0x1000031 0x0707
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+ 0x1000032 0x0307
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+ 0x1000035 0x0200
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+ 0x1000036 0x0008
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+ 0x1000037 0x0004
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+ 0x1000038 0x0000
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+ 0x1000039 0x0707
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+ 0x100003c 0x0002
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+ 0x100003d 0x1d04
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+ 0x1000050 0x0000
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+ 0x1000051 0x00ef
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+ 0x1000052 0x0000
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+ 0x1000053 0x013f
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+ 0x1000060 0xa700
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+ 0x1000061 0x0001
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+ 0x100006a 0x0000
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+ 0x1000080 0x0000
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+ 0x1000081 0x0000
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+ 0x1000082 0x0000
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+ 0x1000083 0x0000
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+ 0x1000084 0x0000
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+ 0x1000085 0x0000
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+ 0x1000090 0x0010
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+ 0x1000092 0x0600
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+ 0x1000007 0x0133>;
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+ debug = <0>;
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+ };
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+
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+ hy28b_ts: hy28b-ts@1 {
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+ compatible = "ti,ads7846";
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+ reg = <1>;
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+
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+ spi-max-frequency = <2000000>;
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+ interrupts = <17 2>; /* high-to-low edge triggered */
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+ interrupt-parent = <&gpio>;
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+ pendown-gpio = <&gpio 17 0>;
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+ ti,x-plate-ohms = /bits/ 16 <100>;
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+ ti,pressure-max = /bits/ 16 <255>;
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+ };
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+ };
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+ };
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+ __overrides__ {
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+ speed = <&hy28b>,"spi-max-frequency:0";
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+ rotate = <&hy28b>,"rotate:0";
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+ fps = <&hy28b>,"fps:0";
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+ debug = <&hy28b>,"debug:0";
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+ xohms = <&hy28b_ts>,"ti,x-plate-ohms;0";
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+ resetgpio = <&hy28b>,"reset-gpios:4",
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+ <&hy28b_pins>, "brcm,pins:4";
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+ ledgpio = <&hy28b>,"led-gpios:4",
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+ <&hy28b_pins>, "brcm,pins:8";
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+ };
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+};
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