60 lines
1.6 KiB
Diff
60 lines
1.6 KiB
Diff
From 4cd9d10a9cd482e993dcfe3bd1d576ad0d11c3c3 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Mon, 26 Jan 2015 09:18:24 +0000
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Subject: [PATCH 078/114] Add pps-gpio DT overlay
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Parameters:
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gpiopin=<input pin> // Default 18
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---
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arch/arm/boot/dts/Makefile | 1 +
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arch/arm/boot/dts/pps-gpio-overlay.dts | 34 ++++++++++++++++++++++++++++++++++
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2 files changed, 35 insertions(+)
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create mode 100644 arch/arm/boot/dts/pps-gpio-overlay.dts
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--- a/arch/arm/boot/dts/Makefile
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+++ b/arch/arm/boot/dts/Makefile
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@@ -62,6 +62,7 @@ dtb-$(CONFIG_BCM2708_DT) += hifiberry-am
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dtb-$(CONFIG_BCM2708_DT) += iqaudio-dac-overlay.dtb
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dtb-$(CONFIG_BCM2708_DT) += iqaudio-dacplus-overlay.dtb
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dtb-$(CONFIG_BCM2708_DT) += lirc-rpi-overlay.dtb
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+dtb-$(CONFIG_BCM2708_DT) += pps-gpio-overlay.dtb
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dtb-$(CONFIG_BCM2708_DT) += w1-gpio-overlay.dtb
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dtb-$(CONFIG_BCM2708_DT) += w1-gpio-pullup-overlay.dtb
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dtb-$(CONFIG_ARCH_BCM2835) += bcm2835-rpi-b.dtb
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--- /dev/null
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+++ b/arch/arm/boot/dts/pps-gpio-overlay.dts
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@@ -0,0 +1,34 @@
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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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+ fragment@0 {
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+ target-path = "/";
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+ __overlay__ {
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+ pps: pps {
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+ compatible = "pps-gpio";
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&pps_pins>;
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+ gpios = <&gpio 18 0>;
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+ status = "okay";
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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 = <&gpio>;
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+ __overlay__ {
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+ pps_pins: pps_pins {
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+ brcm,pins = <18>;
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+ brcm,function = <0>; // in
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+ brcm,pull = <0>; // off
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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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+ gpiopin = <&pps>,"gpios:4",
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+ <&pps_pins>,"brcm,pins:0";
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+ };
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+};
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