drivers/audio/cxd56: Move cxd56 sources into arch/cxd56xx

CXD56 audio functions are inside of the CXD56.
So implementation of it should be under arch directory.

arch/arm/src/cxd56xx/Kconfig

@@ -292,6 +292,49 @@ config CXD56_CHARGER_TEMP_PRECISE
 		This option requires libm.
 endif
 
+comment "NuttX style Audio Driver Support"
+
+menu "NX Audio Driver Support"
+
+config AUDIO_CXD56
+	bool "CXD56 audio driver"
+	default n
+	depends on AUDIO
+	select AUDIO_DRIVER_SPECIFIC_BUFFERS
+	---help---
+		Enable support for audio playback using the CXD5247 chip on the
+		CXD56 Spresense board.
+
+if AUDIO_CXD56
+
+if AUDIO_DRIVER_SPECIFIC_BUFFERS
+
+config AUDIO_CXD56_SRC
+	bool "CXD56 audio sample rate converter"
+	select AUDIO_SRC
+	default n
+	---help---
+		Enable support for audio playback using the CXD5247 chip on the
+		CXD56 Spresense board with sample rate converter.
+
+config CXD56_AUDIO_NUM_BUFFERS
+	int "Number of audio buffers to use"
+	default 4
+
+config CXD56_AUDIO_BUFFER_SIZE
+	int "Size of each audio buffer"
+	default 4096
+
+endif # AUDIO_DRIVER_SPECIFIC_BUFFERS
+
+config CXD56_AUDIO_WORKER_STACKSIZE
+	int "Worker thread stack size"
+	default 768
+
+endif # AUDIO_CXD56
+
+endmenu # menu "NX Audio Driver Support"
+
 comment "Peripheral Support"
 
 menu "Peripheral Support"

arch/arm/src/cxd56xx/Make.defs

@@ -120,6 +120,13 @@ ifeq ($(CONFIG_CXD56_CHARGER),y)
 CHIP_CSRCS += cxd56_charger.c
 endif
 
+ifeq ($(CONFIG_AUDIO_CXD56),y)
+CHIP_CSRCS += cxd56_nxaudio.c
+ifeq ($(CONFIG_AUDIO_CXD56_SRC),y)
+CHIP_CSRCS += cxd56_nxaudio_src.c
+endif
+endif
+
 ifeq ($(CONFIG_CXD56_GE2D),y)
 CHIP_CSRCS += cxd56_ge2d.c
 endif

arch/arm/src/cxd56xx/cxd56_nxaudio.c

@@ -43,10 +43,10 @@
 #include <arch/chip/audio.h>
 #include <arch/chip/chip.h>
 
-#include "cxd56.h"
+#include "cxd56_nxaudio.h"
 
 #ifdef CONFIG_AUDIO_CXD56_SRC
-#include "cxd56_src.h"
+#include "cxd56_nxaudio_src.h"
 #endif
 
 /****************************************************************************

arch/arm/src/cxd56xx/cxd56_nxaudio_src.c

@@ -35,8 +35,8 @@
 #include <nuttx/mqueue.h>
 #include <nuttx/queue.h>
 
-#include "cxd56.h"
+#include "cxd56_nxaudio.h"
-#include "cxd56_src.h"
+#include "cxd56_nxaudio_src.h"
 
 /****************************************************************************
  * Pre-processor Definitions

boards/arm/cxd56xx/common/src/cxd56_audio.c

@@ -33,10 +33,10 @@
 
 #include <nuttx/arch.h>
 #include <nuttx/audio/audio.h>
-#include <nuttx/audio/cxd56.h>
 #include <nuttx/audio/pcm.h>
 #include <nuttx/signal.h>
 #include <arch/chip/audio.h>
+#include <arch/chip/nxaudio.h>
 
 #include "chip.h"
 #include "arm_internal.h"

drivers/audio/Kconfig

@@ -27,43 +27,6 @@ if AUDIO_TONE
 
 endif # AUDIO_TONE
 
-config AUDIO_CXD56
-	bool "CXD56 audio driver"
-	default n
-	depends on AUDIO
-	select AUDIO_DRIVER_SPECIFIC_BUFFERS
-	---help---
-		Enable support for audio playback using the CXD5247 chip on the
-		CXD56 Spresense board.
-
-if AUDIO_CXD56
-
-if AUDIO_DRIVER_SPECIFIC_BUFFERS
-
-config AUDIO_CXD56_SRC
-	bool "CXD56 audio sample rate converter"
-	select AUDIO_SRC
-	default n
-	---help---
-		Enable support for audio playback using the CXD5247 chip on the
-		CXD56 Spresense board with sample rate converter.
-
-config CXD56_AUDIO_NUM_BUFFERS
-	int "Number of audio buffers to use"
-	default 4
-
-config CXD56_AUDIO_BUFFER_SIZE
-	int "Size of each audio buffer"
-	default 4096
-
-endif # AUDIO_DRIVER_SPECIFIC_BUFFERS
-
-config CXD56_AUDIO_WORKER_STACKSIZE
-	int "Worker thread stack size"
-	default 768
-
-endif # AUDIO_CXD56
-
 config AUDIO_VS1053
 	bool "VS1053 codec chip"
 	default n

drivers/audio/Make.defs

@@ -22,13 +22,6 @@
 
 ifeq ($(CONFIG_DRIVERS_AUDIO),y)
 
-ifeq ($(CONFIG_AUDIO_CXD56),y)
-CSRCS += cxd56.c
-ifeq ($(CONFIG_AUDIO_CXD56_SRC),y)
-CSRCS += cxd56_src.c
-endif
-endif
-
 ifeq ($(CONFIG_AUDIO_VS1053),y)
 CSRCS += vs1053.c
 endif