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