ASoC:Add Hifiberry Studio DAC8x soundcard driver

This adds a new driver for complex, multi-channel soundcards.
The cards have their own management using an onboard MCU for clock
generation and controls of various DACs or ADCs. Data provided by
the MCU's register via I2C allows flexible configuration of a
number of DAC and ADC channels, volumes, gain settings and other
functions like mute and filter settings.

Signed-off-by: j-schambacher <joerg@hifiberry.com>

Author: j-schambacher

sound/soc/bcm/Kconfig

@@ -100,6 +100,11 @@ config SND_BCM2708_SOC_HIFIBERRY_DACPLUSDSP
         help
          Say Y or M if you want to add support for HifiBerry DSP-DAC.
 
+config SND_BCM2708_SOC_HIFIBERRY_STUDIO_DAC8X
+        tristate "Support for HifiBerry Studio DAC8x soundcards"
+        help
+         Say Y or M if you want to add support for HifiBerry Studio DAC8x soundcards.
+
 config SND_BCM2708_SOC_HIFIBERRY_DIGI
         tristate "Support for HifiBerry Digi"
         select SND_SOC_WM8804

sound/soc/bcm/Makefile

@@ -24,6 +24,7 @@ snd-soc-hifiberry-dacplushd-objs := hifiberry_dacplushd.o
 snd-soc-hifiberry-dacplusadc-objs := hifiberry_dacplusadc.o
 snd-soc-hifiberry-dacplusadcpro-objs := hifiberry_dacplusadcpro.o
 snd-soc-hifiberry-dacplusdsp-objs := hifiberry_dacplusdsp.o
+snd-soc-hifiberry-studio-dac8x-objs := hifiberry_studio_dac8x.o
 snd-soc-justboom-both-objs := justboom-both.o
 snd-soc-justboom-dac-objs := justboom-dac.o
 snd-soc-rpi-cirrus-objs := rpi-cirrus.o
@@ -58,6 +59,7 @@ obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSHD) += snd-soc-hifiberry-dacplushd
 obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSADC) += snd-soc-hifiberry-dacplusadc.o
 obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSADCPRO) += snd-soc-hifiberry-dacplusadcpro.o
 obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSDSP) += snd-soc-hifiberry-dacplusdsp.o
+obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_STUDIO_DAC8X) += snd-soc-hifiberry-studio-dac8x.o
 obj-$(CONFIG_SND_BCM2708_SOC_JUSTBOOM_BOTH) += snd-soc-justboom-both.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