From ea5d66b73d721b0a21d6b3eb677dd8f65cb8a3dd Mon Sep 17 00:00:00 2001 From: Hans-Wilhelm Warlo <5417271+hanswilw@users.noreply.github.com> Date: Tue, 16 Oct 2018 18:20:48 +0200 Subject: [PATCH 177/725] Add hy28b 2017 model device tree overlay (#2721) The 2017 version of the hy28b display requires a different initialisation sequence. Signed-off-by: Hans-Wilhelm Warlo --- arch/arm/boot/dts/overlays/Makefile | 1 + arch/arm/boot/dts/overlays/README | 19 +++ .../boot/dts/overlays/hy28b-2017-overlay.dts | 152 ++++++++++++++++++ 3 files changed, 172 insertions(+) create mode 100644 arch/arm/boot/dts/overlays/hy28b-2017-overlay.dts --- a/arch/arm/boot/dts/overlays/Makefile +++ b/arch/arm/boot/dts/overlays/Makefile @@ -49,6 +49,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \ hifiberry-digi-pro.dtbo \ hy28a.dtbo \ hy28b.dtbo \ + hy28b-2017.dtbo \ i2c-bcm2708.dtbo \ i2c-gpio.dtbo \ i2c-mux.dtbo \ --- a/arch/arm/boot/dts/overlays/README +++ b/arch/arm/boot/dts/overlays/README @@ -770,6 +770,25 @@ Params: speed Display ledgpio GPIO used to control backlight +Name: hy28b-2017 +Info: HY28B 2017 version - 2.8" TFT LCD Display Module by HAOYU Electronics + Default values match Texy's display shield +Load: dtoverlay=hy28b-2017,= +Params: speed Display SPI bus speed + + rotate Display rotation {0,90,180,270} + + fps Delay between frame updates + + debug Debug output level {0-7} + + xohms Touchpanel sensitivity (X-plate resistance) + + resetgpio GPIO used to reset controller + + ledgpio GPIO used to control backlight + + Name: i2c-bcm2708 Info: Fall back to the i2c_bcm2708 driver for the i2c_arm bus. Load: dtoverlay=i2c-bcm2708 --- /dev/null +++ b/arch/arm/boot/dts/overlays/hy28b-2017-overlay.dts @@ -0,0 +1,152 @@ +/* + * Device Tree overlay for HY28b display shield by Texy. + * Modified for 2017 version with ILI9325 D chip + */ + +/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__ { + hy28b_pins: hy28b_pins { + brcm,pins = <17 25 18>; + brcm,function = <0 1 1>; /* in out out */ + }; + }; + }; + + fragment@4 { + target = <&spi0>; + __overlay__ { + /* needed to avoid dtc warning */ + #address-cells = <1>; + #size-cells = <0>; + + hy28b: hy28b@0{ + compatible = "ilitek,ili9325"; + reg = <0>; + pinctrl-names = "default"; + pinctrl-0 = <&hy28b_pins>; + + spi-max-frequency = <48000000>; + spi-cpol; + spi-cpha; + rotate = <270>; + bgr; + fps = <50>; + buswidth = <8>; + startbyte = <0x70>; + reset-gpios = <&gpio 25 0>; + led-gpios = <&gpio 18 1>; + + init = <0x10000e5 0x78F0 + 0x1000001 0x0100 + 0x1000002 0x0700 + 0x1000003 0x1030 + 0x1000004 0x0000 + 0x1000008 0x0207 + 0x1000009 0x0000 + 0x100000a 0x0000 + 0x100000c 0x0000 + 0x100000d 0x0000 + 0x100000f 0x0000 + 0x1000010 0x0000 + 0x1000011 0x0007 + 0x1000012 0x0000 + 0x1000013 0x0000 + 0x1000007 0x0001 + 0x2000032 + 0x2000032 + 0x2000032 + 0x2000032 + 0x1000010 0x1090 + 0x1000011 0x0227 + 0x2000032 + 0x1000012 0x001f + 0x2000032 + 0x1000013 0x1500 + 0x1000029 0x0027 + 0x100002b 0x000d + 0x2000032 + 0x1000020 0x0000 + 0x1000021 0x0000 + 0x2000032 + 0x1000030 0x0000 + 0x1000031 0x0707 + 0x1000032 0x0307 + 0x1000035 0x0200 + 0x1000036 0x0008 + 0x1000037 0x0004 + 0x1000038 0x0000 + 0x1000039 0x0707 + 0x100003c 0x0002 + 0x100003d 0x1d04 + 0x1000050 0x0000 + 0x1000051 0x00ef + 0x1000052 0x0000 + 0x1000053 0x013f + 0x1000060 0xa700 + 0x1000061 0x0001 + 0x100006a 0x0000 + 0x1000080 0x0000 + 0x1000081 0x0000 + 0x1000082 0x0000 + 0x1000083 0x0000 + 0x1000084 0x0000 + 0x1000085 0x0000 + 0x1000090 0x0010 + 0x1000092 0x0600 + 0x1000007 0x0133>; + debug = <0>; + }; + + hy28b_ts: hy28b-ts@1 { + compatible = "ti,ads7846"; + reg = <1>; + + spi-max-frequency = <2000000>; + interrupts = <17 2>; /* high-to-low edge triggered */ + interrupt-parent = <&gpio>; + pendown-gpio = <&gpio 17 0>; + ti,x-plate-ohms = /bits/ 16 <100>; + ti,pressure-max = /bits/ 16 <255>; + }; + }; + }; + __overrides__ { + speed = <&hy28b>,"spi-max-frequency:0"; + rotate = <&hy28b>,"rotate:0"; + fps = <&hy28b>,"fps:0"; + debug = <&hy28b>,"debug:0"; + xohms = <&hy28b_ts>,"ti,x-plate-ohms;0"; + resetgpio = <&hy28b>,"reset-gpios:4", + <&hy28b_pins>, "brcm,pins:4"; + ledgpio = <&hy28b>,"led-gpios:4", + <&hy28b_pins>, "brcm,pins:8"; + }; +};