Add gpio-presence-sensor
This is to implement the gpio based hw inventory design [1].
There is a new meson option 'gpio-presence' to enable/disable the
daemon.
Summary of the functionality:
- fetch configuration from EM, according to the configuration interface
- the D-Bus interface is
xyz.openbmc_project.Configuration.GPIODeviceDetect
- the configuration represents devices for which presence can be
detected based on gpio values.
- watch gpios for changes
- add/remove the xyz.openbmc_project.Inventory.Source.DevicePresence
interface on the object path based on gpio values.
References:
[1] https://github.com/openbmc/docs/blob/master/designs/inventory/gpio-based-hardware-inventory.md
[2] https://www.kernel.org/doc/html/latest/admin-guide/gpio/gpio-sim.html
Tested: using linux gpio-sim facility, see below
1. create a fake gpio via [2]
2. configure gpio-presence-sensor as per [1]
3. run the gpio-presence-sensor
4. change the value of the gpio previously configured
5. there should be log output (at debug level)
6. the dbus interfaces exposed should appear/disappear as per [1]
Change-Id: I4cf039b583247581aa5c6c6c59e7fc41ced0bb85
Signed-off-by: Alexander Hansen <alexander.hansen@9elements.com>
diff --git a/src/gpio-presence/main.cpp b/src/gpio-presence/main.cpp
new file mode 100644
index 0000000..c680210
--- /dev/null
+++ b/src/gpio-presence/main.cpp
@@ -0,0 +1,26 @@
+/*
+ * SPDX-FileCopyrightText: Copyright (c) 2022-2024.
+ * All rights reserved. SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "gpio_presence_manager.hpp"
+
+#include <phosphor-logging/lg2.hpp>
+#include <sdbusplus/async/context.hpp>
+
+using namespace gpio_presence;
+
+auto main() -> int
+{
+ lg2::debug("starting GPIO Presence Sensor");
+
+ sdbusplus::async::context ctx;
+
+ gpio_presence::GPIOPresenceManager controller(ctx);
+
+ controller.setupBusName();
+
+ controller.start();
+
+ ctx.run();
+}