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92 lines
2.7 KiB
Diff
92 lines
2.7 KiB
Diff
From c0dfc87e355a7c6e434122e1a4fcc69729970610 Mon Sep 17 00:00:00 2001
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From: Samuel Hsu <hsu@distec.de>
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Date: Mon, 8 Apr 2019 17:06:44 +0200
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Subject: [PATCH] BCM2708: Add core Device Tree support, ilitek251x
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Signed-off-by: Samuel Hsu <hsu@distec.de>
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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 | 11 +++++
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.../boot/dts/overlays/ilitek251x-overlay.dts | 45 +++++++++++++++++++
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3 files changed, 57 insertions(+)
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create mode 100644 arch/arm/boot/dts/overlays/ilitek251x-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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@@ -67,6 +67,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
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i2c0-bcm2708.dtbo \
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i2c1-bcm2708.dtbo \
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i2s-gpio28-31.dtbo \
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+ ilitek251x.dtbo \
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iqaudio-dac.dtbo \
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iqaudio-dacplus.dtbo \
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iqaudio-digi-wm8804-audio.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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@@ -1146,6 +1146,17 @@ Load: dtoverlay=i2s-gpio28-31
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Params: <None>
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+Name: ilitek251x
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+Info: Enables I2C connected Ilitek 251x multiple touch controller using
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+ GPIO 4 (pin 7 on GPIO header) for interrupt.
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+Load: dtoverlay=ilitek251x,<param>=<val>
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+Params: interrupt GPIO used for interrupt (default 4)
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+ sizex Touchscreen size x, horizontal resolution of
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+ touchscreen (in pixels)
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+ sizey Touchscreen size y, vertical resolution of
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+ touchscreen (in pixels)
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+
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+
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Name: iqaudio-dac
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Info: Configures the IQaudio DAC audio card
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Load: dtoverlay=iqaudio-dac,<param>
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/ilitek251x-overlay.dts
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@@ -0,0 +1,45 @@
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+// Device tree overlay for I2C connected Ilitek multiple touch controller
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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,bcm2708";
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+
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+ fragment@0 {
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+ target = <&gpio>;
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+ __overlay__ {
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+ ili251x_pins: ili251x_pins {
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+ brcm,pins = <4>; // interrupt
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+ brcm,function = <0>; // in
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+ brcm,pull = <2>; // pull-up //
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+ };
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+ };
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+ };
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+
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+ fragment@1 {
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+ target = <&i2c1>;
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+ __overlay__ {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ status = "okay";
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+
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+ ili251x: ili251x@41 {
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+ compatible = "ilitek,ili251x";
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+ reg = <0x41>;
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&ili251x_pins>;
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+ interrupt-parent = <&gpio>;
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+ interrupts = <4 8>; // high-to-low edge triggered
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+ touchscreen-size-x = <16384>;
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+ touchscreen-size-y = <9600>;
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+ };
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+ };
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+ };
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+
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+ __overrides__ {
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+ interrupt = <&ili251x_pins>,"brcm,pins:0",
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+ <&ili251x>,"interrupts:0";
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+ sizex = <&ili251x>,"touchscreen-size-x:0";
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+ sizey = <&ili251x>,"touchscreen-size-y:0";
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+ };
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+};
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