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From 7c9c2e970b0a047ae2a747752fdd12e31dbb2451 Mon Sep 17 00:00:00 2001
From: Jeff LaBundy <jeff@labundy.com>
Date: Mon, 28 Jan 2019 23:11:47 -0600
Subject: [PATCH] overlays: Add overlay for Azoteq IQS550
This patch adds a device tree overlay for the Azoteq IQS550
trackpad/touchscreen controller.
Signed-off-by: Jeff LaBundy <jeff@labundy.com>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 13 ++++++
arch/arm/boot/dts/overlays/iqs550-overlay.dts | 46 +++++++++++++++++++
3 files changed, 60 insertions(+)
create mode 100644 arch/arm/boot/dts/overlays/iqs550-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -106,6 +106,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
iqaudio-dac.dtbo \
iqaudio-dacplus.dtbo \
iqaudio-digi-wm8804-audio.dtbo \
+ iqs550.dtbo \
irs1125.dtbo \
jedec-spi-nor.dtbo \
justboom-both.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -1991,6 +1991,19 @@ Params: card_name Override
dai stream name.
+Name: iqs550
+Info: Enables I2C connected Azoteq IQS550 trackpad/touchscreen controller
+ using GPIO 4 (pin 7 on GPIO header) for interrupt.
+Load: dtoverlay=iqs550,<param>=<val>
+Params: interrupt GPIO used for interrupt (default 4)
+ reset GPIO used for reset (optional)
+ sizex Touchscreen size x (default 800)
+ sizey Touchscreen size y (default 480)
+ invx Touchscreen inverted x axis
+ invy Touchscreen inverted y axis
+ swapxy Touchscreen swapped x y axis
+
+
Name: irs1125
Info: Infineon irs1125 TOF camera module.
Uses Unicam 1, which is the standard camera connector on most Pi
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/iqs550-overlay.dts
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Definitions for Azoteq IQS550 trackpad/touchscreen controller
+/dts-v1/;
+/plugin/;
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/ {
+ compatible = "brcm,bcm2835";
+
+ fragment@0 {
+ target = <&i2c1>;
+ __overlay__ {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+
+ iqs550: iqs550@74 {
+ compatible = "azoteq,iqs550";
+ reg = <0x74>;
+ interrupt-parent = <&gpio>;
+ interrupts = <4 IRQ_TYPE_LEVEL_HIGH>;
+ touchscreen-size-x = <800>;
+ touchscreen-size-y = <480>;
+ };
+ };
+ };
+
+ fragment@1 {
+ target = <&iqs550>;
+ iqs550_reset: __dormant__ {
+ reset-gpios = <&gpio 255 (GPIO_ACTIVE_LOW |
+ GPIO_PUSH_PULL)>;
+ };
+ };
+
+ __overrides__ {
+ interrupt = <&iqs550>,"interrupts:0";
+ reset = <0>,"+1", <&iqs550_reset>,"reset-gpios:4";
+ sizex = <&iqs550>,"touchscreen-size-x:0";
+ sizey = <&iqs550>,"touchscreen-size-y:0";
+ invx = <&iqs550>,"touchscreen-inverted-x?";
+ invy = <&iqs550>,"touchscreen-inverted-y?";
+ swapxy = <&iqs550>,"touchscreen-swapped-x-y?";
+ };
+};
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