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From 14ea778d2a5281a0f4c94230abccf30bc72c2bdd Mon Sep 17 00:00:00 2001
From: Jeff LaBundy <jeff@labundy.com>
Date: Sat, 19 Mar 2022 20:31:30 -0500
Subject: [PATCH] overlays: iqs550: Enable interrupt pull-down
The device's active-high interrupt normally serves as a push-pull
output, but becomes high-impedance during bootloader mode. Enable
a pull-down to hold the pin in the inactive state.
Signed-off-by: Jeff LaBundy <jeff@labundy.com>
---
arch/arm/boot/dts/overlays/iqs550-overlay.dts | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
--- a/arch/arm/boot/dts/overlays/iqs550-overlay.dts
+++ b/arch/arm/boot/dts/overlays/iqs550-overlay.dts
@@ -20,6 +20,8 @@
reg = <0x74>;
interrupt-parent = <&gpio>;
interrupts = <4 IRQ_TYPE_LEVEL_HIGH>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&iqs550_pins>;
touchscreen-size-x = <800>;
touchscreen-size-y = <480>;
};
@@ -34,8 +36,19 @@
};
};
+ fragment@2 {
+ target = <&gpio>;
+ __overlay__ {
+ iqs550_pins: iqs550_pins {
+ brcm,pins = <4>;
+ brcm,pull = <1>;
+ };
+ };
+ };
+
__overrides__ {
- interrupt = <&iqs550>,"interrupts:0";
+ interrupt = <&iqs550>,"interrupts:0",
+ <&iqs550_pins>,"brcm,pins:0";
reset = <0>,"+1", <&iqs550_reset>,"reset-gpios:4";
sizex = <&iqs550>,"touchscreen-size-x:0";
sizey = <&iqs550>,"touchscreen-size-y:0";
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