ASoC: stm32: Add SPDIFRX support

Add SPDIFRX support to STM32.
Signed-off-by: olivier moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/stm/Kconfig

@@ -18,4 +18,14 @@ config SND_SOC_STM32_I2S
 	help
 	  Say Y if you want to enable I2S for STM32
 
+config SND_SOC_STM32_SPDIFRX
+	tristate "STM32 S/PDIF receiver (SPDIFRX) support"
+	depends on ARCH_STM32 || COMPILE_TEST
+	depends on SND_SOC
+	select SND_SOC_GENERIC_DMAENGINE_PCM
+	select REGMAP_MMIO
+	select SND_SOC_SPDIF
+	help
+	  Say Y if you want to enable S/PDIF capture for STM32
+
 endmenu

sound/soc/stm/Makefile

@@ -8,3 +8,7 @@ obj-$(CONFIG_SND_SOC_STM32_SAI) += snd-soc-stm32-sai.o
 # I2S
 snd-soc-stm32-i2s-objs := stm32_i2s.o
 obj-$(CONFIG_SND_SOC_STM32_I2S) += snd-soc-stm32-i2s.o
+
+# SPDIFRX
+snd-soc-stm32-spdifrx-objs := stm32_spdifrx.o
+obj-$(CONFIG_SND_SOC_STM32_SPDIFRX) += snd-soc-stm32-spdifrx.o