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From 4cd9d10a9cd482e993dcfe3bd1d576ad0d11c3c3 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Mon, 26 Jan 2015 09:18:24 +0000
Subject: [PATCH 078/114] Add pps-gpio DT overlay
Parameters:
gpiopin=<input pin> // Default 18
---
arch/arm/boot/dts/Makefile | 1 +
arch/arm/boot/dts/pps-gpio-overlay.dts | 34 ++++++++++++++++++++++++++++++++++
2 files changed, 35 insertions(+)
create mode 100644 arch/arm/boot/dts/pps-gpio-overlay.dts
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -62,6 +62,7 @@ dtb-$(CONFIG_BCM2708_DT) += hifiberry-am
dtb-$(CONFIG_BCM2708_DT) += iqaudio-dac-overlay.dtb
dtb-$(CONFIG_BCM2708_DT) += iqaudio-dacplus-overlay.dtb
dtb-$(CONFIG_BCM2708_DT) += lirc-rpi-overlay.dtb
+dtb-$(CONFIG_BCM2708_DT) += pps-gpio-overlay.dtb
dtb-$(CONFIG_BCM2708_DT) += w1-gpio-overlay.dtb
dtb-$(CONFIG_BCM2708_DT) += w1-gpio-pullup-overlay.dtb
dtb-$(CONFIG_ARCH_BCM2835) += bcm2835-rpi-b.dtb
--- /dev/null
+++ b/arch/arm/boot/dts/pps-gpio-overlay.dts
@@ -0,0 +1,34 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2708";
+ fragment@0 {
+ target-path = "/";
+ __overlay__ {
+ pps: pps {
+ compatible = "pps-gpio";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pps_pins>;
+ gpios = <&gpio 18 0>;
+ status = "okay";
+ };
+ };
+ };
+
+ fragment@1 {
+ target = <&gpio>;
+ __overlay__ {
+ pps_pins: pps_pins {
+ brcm,pins = <18>;
+ brcm,function = <0>; // in
+ brcm,pull = <0>; // off
+ };
+ };
+ };
+
+ __overrides__ {
+ gpiopin = <&pps>,"gpios:4",
+ <&pps_pins>,"brcm,pins:0";
+ };
+};
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