ASoC: cs47l15: Add codec driver for Cirrus Logic CS47L15

Adds the codec driver for the CS47L15 SmartCodec. This is a
multi-functional codec based on the Cirrus Logic Madera platform.

Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
Signed-off-by: Jaswinder Jassal <jjassal@opensource.wolfsonmicro.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20190725163931.24964-2-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/Kconfig

@@ -70,6 +70,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_CS43130 if I2C
 	select SND_SOC_CS4341 if SND_SOC_I2C_AND_SPI
 	select SND_SOC_CS4349 if I2C
+	select SND_SOC_CS47L15 if MFD_CS47L15
 	select SND_SOC_CS47L24 if MFD_CS47L24
 	select SND_SOC_CS47L35 if MFD_CS47L35
 	select SND_SOC_CS47L85 if MFD_CS47L85
@@ -581,6 +582,9 @@ config SND_SOC_CS4349
 	tristate "Cirrus Logic CS4349 CODEC"
 	depends on I2C
 
+config SND_SOC_CS47L15
+	tristate
+
 config SND_SOC_CS47L24
 	tristate
 
@@ -722,9 +726,11 @@ config SND_SOC_LOCHNAGAR_SC
 
 config SND_SOC_MADERA
 	tristate
+	default y if SND_SOC_CS47L15=y
 	default y if SND_SOC_CS47L35=y
 	default y if SND_SOC_CS47L85=y
 	default y if SND_SOC_CS47L90=y
+	default m if SND_SOC_CS47L15=m
 	default m if SND_SOC_CS47L35=m
 	default m if SND_SOC_CS47L85=m
 	default m if SND_SOC_CS47L90=m

sound/soc/codecs/Makefile

@@ -64,6 +64,7 @@ snd-soc-cs42xx8-i2c-objs := cs42xx8-i2c.o
 snd-soc-cs43130-objs := cs43130.o
 snd-soc-cs4341-objs := cs4341.o
 snd-soc-cs4349-objs := cs4349.o
+snd-soc-cs47l15-objs := cs47l15.o
 snd-soc-cs47l24-objs := cs47l24.o
 snd-soc-cs47l35-objs := cs47l35.o
 snd-soc-cs47l85-objs := cs47l85.o
@@ -346,6 +347,7 @@ obj-$(CONFIG_SND_SOC_CS43130)   += snd-soc-cs43130.o
 obj-$(CONFIG_SND_SOC_CS4341)	+= snd-soc-cs4341.o
 obj-$(CONFIG_SND_SOC_CS4349)	+= snd-soc-cs4349.o
 obj-$(CONFIG_SND_SOC_CS47L24)	+= snd-soc-cs47l24.o
+obj-$(CONFIG_SND_SOC_CS47L15)	+= snd-soc-cs47l15.o
 obj-$(CONFIG_SND_SOC_CS47L35)	+= snd-soc-cs47l35.o
 obj-$(CONFIG_SND_SOC_CS47L85)	+= snd-soc-cs47l85.o
 obj-$(CONFIG_SND_SOC_CS47L90)	+= snd-soc-cs47l90.o

sound/soc/codecs/madera.c

@@ -1041,6 +1041,10 @@ static void madera_configure_input_mode(struct madera *madera)
 	int max_analogue_inputs, max_dmic_sup, i;
 
 	switch (madera->type) {
+	case CS47L15:
+		max_analogue_inputs = 1;
+		max_dmic_sup = 2;
+		break;
 	case CS47L35:
 		max_analogue_inputs = 2;
 		max_dmic_sup = 2;