ASoC: RPi composite driver for PCM512x based cards

Create a new composite driver to support PCM512x based Pi-HAT
DAC soundcards in order to reduce the maintenance overhead
for upstream changes.

This replaces the specific drivers for the following cards:
* Allo Piano DAC
* DionAudio Loco V2
* Justboom DAC
* IQAudioIO DAC

Author: Tim Gover

sound/soc/bcm/Kconfig

@@ -91,6 +91,7 @@ config SND_BCM2708_SOC_JUSTBOOM_DAC
 	tristate "Support for JustBoom DAC"
 	depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 	select SND_SOC_PCM512x
+	select SND_RPI_PCM512x_SOUNDCARD
 	help
 	  Say Y or M if you want to add support for JustBoom DAC.
 
@@ -106,6 +107,7 @@ config SND_BCM2708_SOC_IQAUDIO_DAC
 	tristate "Support for IQaudIO-DAC"
 	depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 	select SND_SOC_PCM512x_I2C
+	select SND_RPI_PCM512x_SOUNDCARD
 	help
 	  Say Y or M if you want to add support for IQaudIO-DAC.
 
@@ -158,13 +160,15 @@ config SND_BCM2708_SOC_DIONAUDIO_LOCO_V2
 	tristate "Support for Dion Audio LOCO-V2 DAC-AMP"
 	depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 	select SND_SOC_PCM5122
+	select SND_RPI_PCM512x_SOUNDCARD
 	help
 	  Say Y or M if you want to add support for Dion Audio LOCO-V2.
 
 config SND_BCM2708_SOC_ALLO_PIANO_DAC
 	tristate "Support for Allo Piano DAC"
 	depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 	select SND_SOC_PCM512x_I2C
+	select SND_RPI_PCM512x_SOUNDCARD
 	help
 	  Say Y or M if you want to add support for Allo Piano DAC.
 
@@ -223,3 +227,9 @@ config SND_RPI_WM8804_SOUNDCARD
 	help
 	  Say Y or M if you want to add support for the Raspberry Pi
           generic driver for WM8804 based soundcards.
+
+config SND_RPI_PCM512x_SOUNDCARD
+	tristate "Support for Raspberry Pi generic PCM512x soundcards"
+	help
+	  Say Y or M if you want to add support for the Raspberry Pi
+          generic driver for PCM512x based soundcards.

sound/soc/bcm/Makefile

@@ -14,41 +14,35 @@ snd-soc-googlevoicehat-codec-objs := googlevoicehat-codec.o
 # BCM2708 Machine Support
 snd-soc-hifiberry-dacplus-objs := hifiberry_dacplus.o
 snd-soc-hifiberry-dacplusadc-objs := hifiberry_dacplusadc.o
-snd-soc-justboom-dac-objs := justboom-dac.o
 snd-soc-rpi-cirrus-objs := rpi-cirrus.o
 snd-soc-rpi-proto-objs := rpi-proto.o
-snd-soc-iqaudio-dac-objs := iqaudio-dac.o
 snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o
 snd-soc-audioinjector-octo-soundcard-objs := audioinjector-octo-soundcard.o
 snd-soc-digidac1-soundcard-objs := digidac1-soundcard.o
 snd-soc-dionaudio-loco-objs := dionaudio_loco.o
-snd-soc-dionaudio-loco-v2-objs := dionaudio_loco-v2.o
 snd-soc-allo-boss-dac-objs := allo-boss-dac.o
-snd-soc-allo-piano-dac-objs := allo-piano-dac.o
 snd-soc-allo-piano-dac-plus-objs := allo-piano-dac-plus.o
 snd-soc-allo-katana-codec-objs := allo-katana-codec.o
 snd-soc-pisound-objs := pisound.o
 snd-soc-fe-pi-audio-objs := fe-pi-audio.o
 snd-soc-rpi-simple-soundcard-objs := rpi-simple-soundcard.o
 snd-soc-rpi-wm8804-soundcard-objs := rpi-wm8804-soundcard.o
+snd-soc-rpi-pcm512x-soundcard-objs := rpi-pcm512x-soundcard.o
 
 obj-$(CONFIG_SND_BCM2708_SOC_GOOGLEVOICEHAT_SOUNDCARD)  += snd-soc-googlevoicehat-codec.o
 obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += snd-soc-hifiberry-dacplus.o
 obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSADC) += snd-soc-hifiberry-dacplusadc.o
-obj-$(CONFIG_SND_BCM2708_SOC_JUSTBOOM_DAC) += snd-soc-justboom-dac.o
 obj-$(CONFIG_SND_BCM2708_SOC_RPI_CIRRUS) += snd-soc-rpi-cirrus.o
 obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO) += snd-soc-rpi-proto.o
-obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o
 obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o
 obj-$(CONFIG_SND_AUDIOINJECTOR_OCTO_SOUNDCARD) += snd-soc-audioinjector-octo-soundcard.o
 obj-$(CONFIG_SND_DIGIDAC1_SOUNDCARD) += snd-soc-digidac1-soundcard.o
 obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO) += snd-soc-dionaudio-loco.o
-obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO_V2) += snd-soc-dionaudio-loco-v2.o
 obj-$(CONFIG_SND_BCM2708_SOC_ALLO_BOSS_DAC) += snd-soc-allo-boss-dac.o
-obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC) += snd-soc-allo-piano-dac.o
 obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC_PLUS) += snd-soc-allo-piano-dac-plus.o
 obj-$(CONFIG_SND_BCM2708_SOC_ALLO_KATANA_DAC) += snd-soc-allo-katana-codec.o
 obj-$(CONFIG_SND_PISOUND) += snd-soc-pisound.o
 obj-$(CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO) += snd-soc-fe-pi-audio.o
 obj-$(CONFIG_SND_RPI_SIMPLE_SOUNDCARD) += snd-soc-rpi-simple-soundcard.o
 obj-$(CONFIG_SND_RPI_WM8804_SOUNDCARD) += snd-soc-rpi-wm8804-soundcard.o
+obj-$(CONFIG_SND_RPI_PCM512x_SOUNDCARD) += snd-soc-rpi-pcm512x-soundcard.o