rtu: implement modbus sensor read
Read the modbus device config from the Entity Manager configuration and
create the sensor interfaces for related sensor register config.
Tested:
Added new Unit test named test_sensors -
```
> meson test -t 10 -C builddir/ --print-errorlogs --wrapper="valgrind --error-exitcode=1" test_sensors
ninja: Entering directory `/host/repos/Modbus/phosphor-modbus/builddir'
[2/2] Linking target tests/test_sensors
1/1 test_sensors OK 13.98s
Ok: 1
Fail: 0
```
Tested on Qemu using Mock Modbus Device -
```
root@ventura:~# busctl tree xyz.openbmc_project.ModbusRTU
└─ /xyz
└─ /xyz/openbmc_project
├─ /xyz/openbmc_project/inventory_source
│ ├─ /xyz/openbmc_project/inventory_source/Heat_Exchanger_12_DevTTYUSB0
│ ├─ /xyz/openbmc_project/inventory_source/Heat_Exchanger_12_DevTTYUSB1
│ ├─ /xyz/openbmc_project/inventory_source/Reservoir_Pumping_Unit_12_DevTTYUSB0
│ └─ /xyz/openbmc_project/inventory_source/Reservoir_Pumping_Unit_12_DevTTYUSB1
└─ /xyz/openbmc_project/sensors
└─ /xyz/openbmc_project/sensors/temperature
├─ /xyz/openbmc_project/sensors/temperature/Reservoir_Pumping_Unit_12_DevTTYUSB0_RPU_Coolant_Inlet_Temp_C
├─ /xyz/openbmc_project/sensors/temperature/Reservoir_Pumping_Unit_12_DevTTYUSB0_RPU_Coolant_Outlet_Temp_C
├─ /xyz/openbmc_project/sensors/temperature/Reservoir_Pumping_Unit_12_DevTTYUSB1_RPU_Coolant_Inlet_Temp_C
└─ /xyz/openbmc_project/sensors/temperature/Reservoir_Pumping_Unit_12_DevTTYUSB1_RPU_Coolant_Outlet_Temp_C
busctl introspect xyz.openbmc_project.ModbusRTU /xyz/openbmc_project/sensors/temperature/Reservoir_Pumping_Unit_12_DevTTYUSB1_RPU_Coolant_Outlet_Temp_C
NAME TYPE SIGNATURE RESULT/VALUE FLAGS
org.freedesktop.DBus.Introspectable interface - - -
.Introspect method - s -
org.freedesktop.DBus.Peer interface - - -
.GetMachineId method - s -
.Ping method - - -
org.freedesktop.DBus.Properties interface - - -
.Get method ss v -
.GetAll method s a{sv} -
.Set method ssv - -
.PropertiesChanged signal sa{sv}as - -
xyz.openbmc_project.Sensor.Value interface - - -
.MaxValue property d nan emits-change writable
.MinValue property d nan emits-change writable
.Unit property s "xyz.openbmc_project.Sensor.Value.Unit.… emits-change writable
.Value property d 1670.6 emits-change writable
```
Change-Id: I1368e8df5999b5cee9ac19d185ee110a9ecc3021
Signed-off-by: Jagpal Singh Gill <paligill@gmail.com>
diff --git a/rtu/device/base_device.hpp b/rtu/device/base_device.hpp
new file mode 100644
index 0000000..a64d708
--- /dev/null
+++ b/rtu/device/base_device.hpp
@@ -0,0 +1,40 @@
+#pragma once
+
+#include "base_config.hpp"
+#include "modbus/modbus.hpp"
+#include "port/base_port.hpp"
+
+#include <sdbusplus/async.hpp>
+#include <xyz/openbmc_project/Sensor/Value/aserver.hpp>
+
+namespace phosphor::modbus::rtu::device
+{
+
+class Device;
+
+using SensorValueIntf =
+ sdbusplus::aserver::xyz::openbmc_project::sensor::Value<Device>;
+using PortIntf = phosphor::modbus::rtu::port::BasePort;
+
+class BaseDevice
+{
+ public:
+ BaseDevice() = delete;
+
+ explicit BaseDevice(sdbusplus::async::context& ctx,
+ const config::Config& config, PortIntf& serialPort);
+
+ auto readSensorRegisters() -> sdbusplus::async::task<void>;
+
+ private:
+ auto createSensors() -> void;
+
+ using sensors_map_t =
+ std::unordered_map<std::string, std::unique_ptr<SensorValueIntf>>;
+ sdbusplus::async::context& ctx;
+ const config::Config config;
+ PortIntf& serialPort;
+ sensors_map_t sensors;
+};
+
+} // namespace phosphor::modbus::rtu::device