target/linux/brcm2708/patches-3.18/0078-Add-pps-gpio-DT-overlay.patch

   1 From 4cd9d10a9cd482e993dcfe3bd1d576ad0d11c3c3 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Mon, 26 Jan 2015 09:18:24 +0000
   4 Subject: [PATCH 078/114] Add pps-gpio DT overlay
   5
   6 Parameters:
   7     gpiopin=<input pin>    // Default 18
   8 ---
   9  arch/arm/boot/dts/Makefile             |  1 +
  10  arch/arm/boot/dts/pps-gpio-overlay.dts | 34 ++++++++++++++++++++++++++++++++++
  11  2 files changed, 35 insertions(+)
  12  create mode 100644 arch/arm/boot/dts/pps-gpio-overlay.dts
  13
  14 --- a/arch/arm/boot/dts/Makefile
  15 +++ b/arch/arm/boot/dts/Makefile
  16 @@ -62,6 +62,7 @@ dtb-$(CONFIG_BCM2708_DT) += hifiberry-am
  17  dtb-$(CONFIG_BCM2708_DT) += iqaudio-dac-overlay.dtb
  18  dtb-$(CONFIG_BCM2708_DT) += iqaudio-dacplus-overlay.dtb
  19  dtb-$(CONFIG_BCM2708_DT) += lirc-rpi-overlay.dtb
  20 +dtb-$(CONFIG_BCM2708_DT) += pps-gpio-overlay.dtb
  21  dtb-$(CONFIG_BCM2708_DT) += w1-gpio-overlay.dtb
  22  dtb-$(CONFIG_BCM2708_DT) += w1-gpio-pullup-overlay.dtb
  23  dtb-$(CONFIG_ARCH_BCM2835) += bcm2835-rpi-b.dtb
  24 --- /dev/null
  25 +++ b/arch/arm/boot/dts/pps-gpio-overlay.dts
  26 @@ -0,0 +1,34 @@
  27 +/dts-v1/;
  28 +/plugin/;
  29 +
  30 +/ {
  31 +       compatible = "brcm,bcm2708";
  32 +       fragment@0 {
  33 +               target-path = "/";
  34 +               __overlay__ {
  35 +                       pps: pps {
  36 +                               compatible = "pps-gpio";
  37 +                               pinctrl-names = "default";
  38 +                               pinctrl-0 = <&pps_pins>;
  39 +                               gpios = <&gpio 18 0>;
  40 +                               status = "okay";
  41 +                       };
  42 +               };
  43 +       };
  44 +
  45 +       fragment@1 {
  46 +               target = <&gpio>;
  47 +               __overlay__ {
  48 +                       pps_pins: pps_pins {
  49 +                               brcm,pins =     <18>;
  50 +                               brcm,function = <0>;    // in
  51 +                               brcm,pull =     <0>;    // off
  52 +                       };
  53 +               };
  54 +       };
  55 +
  56 +       __overrides__ {
  57 +               gpiopin = <&pps>,"gpios:4",
  58 +                         <&pps_pins>,"brcm,pins:0";
  59 +       };
  60 +};