ASoC: Initial driver for TAS2555 Smart Amplifier

The initial version supports playback via ROM mode1 and FW loading..
Features:
- support for 8-192KHz sampling rates
- support for 16/20/24/32 bit samples
- TDM time slot support support (in DSP interface modes)
- ASI1, ASI2 and ASIM can be selected and configured
- Clocking setup:
 MCLK source cen be selected and depending on the frequency the Amp will be
 configured to bypass or use the PLL. The PLL dividers and MDAC divider is
 calculated by the driver based on the MCLK and smapling frequency.
- The driver will try to load the 'tas2555_uCDSP.bin' firmware when it
is loading.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>

Documentation/devicetree/bindings/sound/ti,tas2555.txt

@@ -0,0 +1,61 @@
+Texas Instruments - tas2555 Class-D Mono Audio Amplifier
+		    http://www.ti.com/product/TAS2555
+
+Required properties:
+- compatible - "ti,tas2555"
+- reg -  I2C slave address
+- supply-*: Required supply regulators are:
+	 "iovdd"	I/O power supply
+	 "avdd"		Analog power supply
+	 "dvdd"		Digital power supply
+
+Optional properties:
+- nreset-gpio - gpio pin to enable/disable the device
+- supply-vbat - Battery power supply
+
+tas2555 can receive it's reference clock via several pin: GPIO1-10, GPI1-3.
+Three digital audio interface is available for connecting to CPU or other
+audio component.
+
+For system integration the dt-bindings/sound/tas2555.h header file provides
+defined values to select the pin for MCLK and predefined values for selecting
+the DAI to be used.
+
+Example:
+
+tas2555: tas2555@4c {
+	#sound-dai-cells = <1>;
+	compatible = "ti,tas2555";
+	reg = <0x4c>;
+	nreset-gpio = <&gpio4 2 GPIO_ACTIVE_HIGH>;
+
+	iovdd-supply = <&boardio_fixed>;
+	avdd-supply = <&aud18v_fixed>;
+	dvdd-supply = <&aud18v_fixed>;
+};
+
+sound {
+	compatible = "simple-audio-card";
+	simple-audio-card,name = "TAS2555 card";
+	simple-audio-card,widgets =
+		"Speaker", "Speaker Port";
+	simple-audio-card,routing =
+		"Speaker Port",	"OUT",
+		"Speaker Port",	"OUT";
+	simple-audio-card,format = "i2s";
+	simple-audio-card,bitclock-master = <&sound_master>;
+	simple-audio-card,frame-master = <&sound_master>;
+
+	status = "okay";
+
+	sound_master: simple-audio-card,cpu {
+		sound-dai = <&mcasp0>;
+		system-clock-frequency = <24000000>;
+		system-clock-id = <MCASP_CLK_HCLK_AUXCLK>;
+	};
+
+	simple-audio-card,codec {
+		sound-dai = <&tas2555 TAS2555_DAI_ASI1>;
+		clocks = <&clkout2_ck>;
+	};
+};

include/dt-bindings/sound/tas2555.h

@@ -0,0 +1,23 @@
+#ifndef __DT_TAS2555_H
+#define __DT_TAS2555_H
+
+#define TAS2555_MCLK_CLKIN_SRC_GPI2	(0)	/* Default for MCLK */
+#define TAS2555_MCLK_CLKIN_SRC_GPIO1	(1)	/* Default for ASI1 BCLK */
+#define TAS2555_MCLK_CLKIN_SRC_GPIO2	(2)
+#define TAS2555_MCLK_CLKIN_SRC_GPIO3	(3)
+#define TAS2555_MCLK_CLKIN_SRC_GPIO4	(4)
+#define TAS2555_MCLK_CLKIN_SRC_GPIO5	(5)
+#define TAS2555_MCLK_CLKIN_SRC_GPIO6	(6)
+#define TAS2555_MCLK_CLKIN_SRC_GPIO7	(7)
+#define TAS2555_MCLK_CLKIN_SRC_GPIO8	(8)
+#define TAS2555_MCLK_CLKIN_SRC_GPIO9	(9)
+#define TAS2555_MCLK_CLKIN_SRC_GPIO10	(10)
+#define TAS2555_MCLK_CLKIN_SRC_GPI1	(11)
+#define TAS2555_MCLK_CLKIN_SRC_GPI3	(12)
+
+/* Digital audio interfaces */
+#define TAS2555_DAI_ASI1		(0)
+#define TAS2555_DAI_ASI2		(1)
+#define TAS2555_DAI_ASIM		(2)
+
+#endif /* __DT_TAS2555_H */

sound/soc/codecs/Kconfig

@@ -204,6 +204,7 @@ config SND_SOC_ALL_CODECS
 	imply SND_SOC_STAC9766
 	imply SND_SOC_STI_SAS
 	imply SND_SOC_TAS2552
+	imply SND_SOC_TAS2555
 	imply SND_SOC_TAS2562
 	imply SND_SOC_TAS2764
 	imply SND_SOC_TAS2770
@@ -1389,6 +1390,11 @@ config SND_SOC_TAS2552
 	tristate "Texas Instruments TAS2552 Mono Audio amplifier"
 	depends on I2C
 
+config SND_SOC_TAS2555
+	tristate "Texas Instruments TAS2555 High Performance 4W Smart Amplifier"
+	depends on I2C
+	select REGMAP_I2C
+
 config SND_SOC_TAS2562
 	tristate "Texas Instruments TAS2562 Mono Audio amplifier"
 	depends on I2C

sound/soc/codecs/Makefile

@@ -323,6 +323,7 @@ snd-soc-max98504-objs := max98504.o
 snd-soc-simple-amplifier-objs := simple-amplifier.o
 snd-soc-tpa6130a2-objs := tpa6130a2.o
 snd-soc-tas2552-objs := tas2552.o
+snd-soc-tas2555-objs := tas2555.o
 snd-soc-tas2562-objs := tas2562.o
 snd-soc-tas2764-objs := tas2764.o
 # Mux
@@ -550,6 +551,7 @@ obj-$(CONFIG_SND_SOC_STA529)   += snd-soc-sta529.o
 obj-$(CONFIG_SND_SOC_STAC9766)	+= snd-soc-stac9766.o
 obj-$(CONFIG_SND_SOC_STI_SAS)	+= snd-soc-sti-sas.o
 obj-$(CONFIG_SND_SOC_TAS2552)	+= snd-soc-tas2552.o
+obj-$(CONFIG_SND_SOC_TAS2555)	+= snd-soc-tas2555.o
 obj-$(CONFIG_SND_SOC_TAS2562)	+= snd-soc-tas2562.o
 obj-$(CONFIG_SND_SOC_TAS2764)	+= snd-soc-tas2764.o
 obj-$(CONFIG_SND_SOC_TAS5086)	+= snd-soc-tas5086.o