ipa: raspberrypi: lux: Supply missing method and remove atomic variable

Supply the missing SetCurrentAperture() method (even though no one is
calling it). If we did call it, it would be called synchronously so
the atomic variable is not required.

Signed-off-by: David Plowman <david.plowman@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/ipa/raspberrypi/controller/rpi/lux.cpp

@@ -46,6 +46,11 @@ void Lux::Read(boost::property_tree::ptree const &params)
 	current_aperture_ = reference_aperture_;
 }
 
+void Lux::SetCurrentAperture(double aperture)
+{
+	current_aperture_ = aperture;
+}
+
 void Lux::Prepare(Metadata *image_metadata)
 {
 	std::unique_lock<std::mutex> lock(mutex_);

src/ipa/raspberrypi/controller/rpi/lux.hpp

@@ -6,7 +6,6 @@
  */
 #pragma once
 
-#include <atomic>
 #include <mutex>
 
 #include "../lux_status.h"
@@ -34,7 +33,7 @@ private:
 	double reference_aperture_; // units of 1/f
 	double reference_Y_; // out of 65536
 	double reference_lux_;
-	std::atomic<double> current_aperture_;
+	double current_aperture_;
 	LuxStatus status_;
 	std::mutex mutex_;
 };