ASoC: adds component driver for TAS575xM digital amplifiers

Adds a minimum component driver to run the amplifier in I2S master
mode only from standard audio clocks. Therefore, it only allows
44.1, 88.2, 176.4, 48, 96 and 192ksps with 16, 20, 24 and 32 bits
sample size. Digital volume control and the -6dB and +0.8dB switches
are supported.

Signed-off-by: Joerg Schambacher <joerg@hifiberry.com>

sound/soc/codecs/Kconfig

@@ -217,6 +217,7 @@ config SND_SOC_ALL_CODECS
 	imply SND_SOC_TAS5086
 	imply SND_SOC_TAS571X
 	imply SND_SOC_TAS5720
+	imply SND_SOC_TAS5754M
 	imply SND_SOC_TAS6424
 	imply SND_SOC_TDA7419
 	imply SND_SOC_TFA9879
@@ -1485,6 +1486,13 @@ config SND_SOC_TAS5720
 	  Enable support for Texas Instruments TAS5720L/M high-efficiency mono
 	  Class-D audio power amplifiers.
 
+config SND_SOC_TAS5754M
+	tristate "Texas Instruments TAS5754M Digital Input Audio amplifier"
+	depends on I2C
+	help
+	  Enable support for Texas Instruments TAS5754M digital input
+	  Class-D audio power amplifiers.
+
 config SND_SOC_TAS6424
 	tristate "Texas Instruments TAS6424 Quad-Channel Audio amplifier"
 	depends on I2C

sound/soc/codecs/Makefile

@@ -236,6 +236,7 @@ snd-soc-sti-sas-objs := sti-sas.o
 snd-soc-tas5086-objs := tas5086.o
 snd-soc-tas571x-objs := tas571x.o
 snd-soc-tas5720-objs := tas5720.o
+snd-soc-tas5754m-objs := tas5754m.o
 snd-soc-tas6424-objs := tas6424.o
 snd-soc-tda7419-objs := tda7419.o
 snd-soc-tas2770-objs := tas2770.o
@@ -574,6 +575,7 @@ obj-$(CONFIG_SND_SOC_TAS2764)	+= snd-soc-tas2764.o
 obj-$(CONFIG_SND_SOC_TAS5086)	+= snd-soc-tas5086.o
 obj-$(CONFIG_SND_SOC_TAS571X)	+= snd-soc-tas571x.o
 obj-$(CONFIG_SND_SOC_TAS5720)	+= snd-soc-tas5720.o
+obj-$(CONFIG_SND_SOC_TAS5754M)	+= snd-soc-tas5754m.o
 obj-$(CONFIG_SND_SOC_TAS6424)	+= snd-soc-tas6424.o
 obj-$(CONFIG_SND_SOC_TDA7419)	+= snd-soc-tda7419.o
 obj-$(CONFIG_SND_SOC_TAS2770) += snd-soc-tas2770.o