ASoC: SOF: imx: Add i.MX8 HW support

Add support for the audio DSP hardware found on NXP i.MX8 platform.

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190821164730.7385-4-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/Kconfig

@@ -173,6 +173,7 @@ config SND_SOC_SOF_PROBE_WORK_QUEUE
 	  When selected, the probe is handled in two steps, for example to
 	  avoid lockdeps if request_module is used in the probe.
 
+source "sound/soc/sof/imx/Kconfig"
 source "sound/soc/sof/intel/Kconfig"
 source "sound/soc/sof/xtensa/Kconfig"
 

sound/soc/sof/Makefile

@@ -18,4 +18,5 @@ obj-$(CONFIG_SND_SOC_SOF_OF) += snd-sof-of.o
 obj-$(CONFIG_SND_SOC_SOF_PCI) += snd-sof-pci.o
 
 obj-$(CONFIG_SND_SOC_SOF_INTEL_TOPLEVEL) += intel/
+obj-$(CONFIG_SND_SOC_SOF_IMX_TOPLEVEL) += imx/
 obj-$(CONFIG_SND_SOC_SOF_XTENSA) += xtensa/

sound/soc/sof/imx/Kconfig

@@ -0,0 +1,22 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+
+config SND_SOC_SOF_IMX_TOPLEVEL
+	bool "SOF support for NXP i.MX audio DSPs"
+	depends on ARM64 && SND_SOC_SOF_OF || COMPILE_TEST
+	help
+          This adds support for Sound Open Firmware for NXP i.MX platforms.
+          Say Y if you have such a device.
+          If unsure select "N".
+
+if SND_SOC_SOF_IMX_TOPLEVEL
+
+config SND_SOC_SOF_IMX8
+	tristate "SOF support for i.MX8"
+	depends on IMX_SCU
+	depends on IMX_DSP
+	help
+          This adds support for Sound Open Firmware for NXP i.MX8 platforms
+          Say Y if you have such a device.
+          If unsure select "N".
+
+endif ## SND_SOC_SOF_IMX_IMX_TOPLEVEL

sound/soc/sof/imx/Makefile

@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+snd-sof-imx8-objs := imx8.o
+
+obj-$(CONFIG_SND_SOC_SOF_IMX8) += snd-sof-imx8.o