From 89d3a605e31b5e4efbe1b28b08206da4e75fd689 Mon Sep 17 00:00:00 2001
From: Kai Wohlfahrt <kai.wohlfahrt@gmail.com>
Date: Wed, 29 Apr 2020 23:10:03 +0100
Subject: [PATCH] gpio-tools: init in kernel 5.4

Linux provides some tools to interact with the gpiochip interface (which
replaces the deprecated sysfs GPIO interface). Expose these as a
package.

The tool has not changed much recently, so there is no need to package a
version for each kernel.
---
 pkgs/os-specific/linux/kernel/gpio-utils.nix | 24 ++++++++++++++++++++
 pkgs/top-level/all-packages.nix              |  1 +
 2 files changed, 25 insertions(+)
 create mode 100644 pkgs/os-specific/linux/kernel/gpio-utils.nix

diff --git a/pkgs/os-specific/linux/kernel/gpio-utils.nix b/pkgs/os-specific/linux/kernel/gpio-utils.nix
new file mode 100644
index 000000000000..447704eedc8d
--- /dev/null
+++ b/pkgs/os-specific/linux/kernel/gpio-utils.nix
@@ -0,0 +1,24 @@
+{ lib, stdenv, linux }:
+
+with lib;
+
+assert versionAtLeast linux.version "4.6";
+
+stdenv.mkDerivation {
+  name = "gpio-utils-${linux.version}";
+
+  inherit (linux) src makeFlags;
+
+  preConfigure = ''
+    cd tools/gpio
+  '';
+
+  separateDebugInfo = true;
+  installFlags = [ "install" "DESTDIR=$(out)" "bindir=/bin" ];
+
+  meta = {
+    description = "Linux tools to inspect the gpiochip interface";
+    maintainers = with stdenv.lib.maintainers; [ kwohlfahrt ];
+    platforms = stdenv.lib.platforms.linux;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index e03841d1aa79..d516a1ceee50 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -26468,4 +26468,5 @@ in
 
   vpsfree-client = callPackage ../tools/virtualization/vpsfree-client {};
 
+  gpio-utils = callPackage ../os-specific/linux/kernel/gpio-utils.nix { };
 }